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CN102651613B - System and method used for constant-voltage mode and constant-current mode in flyback supply convertor - Google Patents

System and method used for constant-voltage mode and constant-current mode in flyback supply convertor Download PDF

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CN102651613B
CN102651613B CN201110051423.2A CN201110051423A CN102651613B CN 102651613 B CN102651613 B CN 102651613B CN 201110051423 A CN201110051423 A CN 201110051423A CN 102651613 B CN102651613 B CN 102651613B
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signal
output
receive
sensing
output signal
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CN102651613A (en
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张允超
曹亚明
黄晓敏
张秀红
方烈义
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On Bright Electronics Shanghai Co Ltd
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Abstract

The invention discloses a system and a method used for a constant-voltage mode and a constant-current mode in a flyback supply convertor. The system comprises a first signal generator which is configured for receiving a first sensing signal and generating an output signal related to demagnetization, the first sensing signal is related to a first winding coupled to a secondary winding of the supply convertor, and the secondary winding is at least related to the output current of the supply convertor; in addition, the system comprises a ramp signal generator which is configured for receiving the output signal and generating a ramp signal and a first comparator which is configured for receiving the ramp signal and a first threshold signal and generating a first comparison signal at least based on information related to the ramp signal and the first threshold signal; and furthermore, the system comprises a second comparator which is configured for receiving a second sensing signal and a second threshold signal and generating a second comparison signal.

Description

For the constant voltage of flyback power supply converter and the system and method for constant current mode
Technical field
The present invention relates to integrated circuit.More specifically, the invention provides the system and method for constant voltage mode and constant current mode.As just example, the flyback power supply converter that the present invention has been applied to having primary side sensing (sensing) and has adjusted (regulation).But will recognize, the present invention has much wide range of application.
Background technology
Flyback power supply converter is widely used in low power applications because of its simple structure and low cost.But in classical inverse excitation type converter, conventionally utilize the isolation layout of photoelectrical coupler and TL431 to feed back to carry out output voltage adjustment by primary side.Except increasing system cost, the voltage drop causing due to cable loss is normally difficult to compensate.
Fig. 1 is the simplification tradition diagram of the switching mode flyback power supply transformation system for having primary side control.As shown in Figure 1, PWM controller 110 is used for controlling and driving power MOSFETM1.Make power supply MOSFET M1 conducting and cut-off control the power that is delivered to the load in primary side.Therefore, constant output voltage (CV) pattern and constant output current (CC) pattern can be adjusted and obtained by primary side.
Fig. 2 illustrates the output voltage of flyback power supply transformation system and the simplification of output current characteristic tradition diagram.As shown in Figure 2, if output current I ofrom zero to I max, scope in, system operates in constant voltage (CV) pattern.In CV pattern, output voltage V ofor example equal V max.Alternatively, if output voltage at V maxbelow, system operates in constant current (CC) pattern.In CC pattern, output current I ofor example equal I max.In another example, if the lead-out terminal of system is connected to through discharge battery, system operates in CC pattern.
For reduce switching mode flyback power supply converter cost and size and also in order to improve its efficiency, the supply convertor with primary side adjustment becomes and becomes more and more popular.In primary side is adjusted, carry out sensing output voltage by detecting close-coupled to the voltage of the auxiliary winding of secondary winding.Because the voltage of auxiliary winding reflects the output voltage that (image) is associated with secondary winding, the voltage therefore sensing in auxiliary winding can be used to adjust primary side output voltage.Conventionally do not need the expensive part in TL431 and photoelectrical coupler, therefore can reduce cost and size.In addition, utilize the information of the output voltage sensing, can the internal calculation based on controller adjust output current.Therefore, conventionally do not need the sense resistor for output current, therefore can improve overall conversion efficiency.
Fig. 3 is the simplification tradition diagram with the switching mode flyback power supply transformation system of primary side sensing and modulation.Fig. 4 is that another of switching mode flyback power supply transformation system with primary side sensing and modulation simplified traditional diagram.
As shown in the figure, output voltage V outbe mapped to the DC voltage V at node INV place iNV, therefore pass through V iNVadjustment and be adjusted.In primary side is adjusted, V iNVand V outrelation can be expressed as:
V INV = n × R 2 R 1 + R 2 × ( V out + V D 2 ) - R 2 R 1 + R 2 × V D 1 - - - ( 1 )
Wherein, n is auxiliary umber of turn and the ratio of the secondary winding number of turn.In addition, V d1and V d2it is forward direction diode drop.
Arrange
Figure BSA00000443883900022
therefore, V outprovided by following formula:
V out = k × V INV + 1 n V D 1 - V D 2 - - - ( 2 )
Output voltage is adjusted by the adjustment of the voltage to auxiliary winding.For example, the voltage V sensing iNVby with predetermined voltage level V rEFcompare.V iNVwith V rEFdifference be associated with error signal, this V iNVwith V rEFdifference amplified by error amplifier.Error signal based on through amplifying at least in part, PWM/PFM signal is generated.
The on/off of PWM/PFM signal control power supply switch, therefore controls the power that is delivered to primary side.As a result, V iNVwith V rEFdifference become more and more less, and final, V iNVbecome and equal V rEF.Due to V iNVit is output voltage V outreflection, if therefore some condition is met, output voltage V outcan depend on linearly V iNV, therefore depend on V rEF.
Particularly, as follows, if the forward voltage at diode D1 and D2 two ends is constant, output voltage V outdepend on linearly V rEF.
V out = k × V REF + 1 n V D 1 - V D 2 - - - ( 3 )
But the forward voltage of diode depends on the electric current of this diode of flowing through conventionally.Therefore,, if load current changes, the forward voltage of D2 changes.Even because the electric current of the D1 that flows through is also constant in the time that output load current changes, therefore the forward voltage of D1 is always constant.
Fig. 5 is the traditional diagram of another simplification with the switching mode flyback power supply transformation system of primary side sensing and modulation.Power converting system 2000 comprises armature winding 2010, secondary winding 2012, auxiliary winding 2014, mains switch 2020, current-sense resistor 2030, the equivalent resistor 2040 of output cable, resistor 2050 and 2052, and rectifier diode 2060 and 2062.For example, mains switch 2020 is npn bipolar transistors.In another example, mains switch 2020 is mosfet transistors.In another example, mains switch 2020 is igbt transistors.
As shown in Figure 5, in order to adjust output voltage in preset range, the information relevant with output voltage and output loading need to be extracted conventionally.In interrupted conduction mode (DCM), such information can be extracted by auxiliary winding 2014.In the time of mains switch 2020 conducting, energy is stored in secondary winding 2012.Then, in the time that mains switch 2020 ends, institute's stored energy is released to lead-out terminal, and output voltage in the voltage of auxiliary winding 2014 mapping primary side, as follows.
V FB = 1 k × ( V o + V D 2 + I o × R eq ) - V D 1 k × n - - - ( 4 )
Wherein, V fBrepresent the voltage at node 2054 places.R 1and R 2represent respectively the resistance value of resistor 2050 and 2052.In addition, n represents the turn ratio between auxiliary winding 2014 and secondary winding 2012.Particularly, n equals the number of turn of auxiliary winding 2014 divided by the number of turn of secondary winding 2012.V oand I orepresent respectively output voltage and output current.In addition, respectively, V d1represent the forward voltage of rectifier diode 2062, V d2represent the forward voltage of rectifier diode 2060.In addition R, eqrepresent the resistance value of equivalent resistor 2040, and k represents to equal feedback factor.
Fig. 6 is the simplification diagram that the traditional operation mechanism of flyback power supply transformation system 2000 is shown.As shown in Figure 6, the controller chip of transformation system 2000 uses sampling to keep mechanism.Demagnetization in primary side is processed and is almost completed and the electric current I of secondary winding 2012 secalmost when vanishing, the voltage V at node 2054 places fB(the V of itself and auxiliary winding 2012 auxproportional) be for example sampled at the some A place of Fig. 6.The magnitude of voltage that sampling obtains is kept conventionally until next voltage sample is performed.By negative feedback loop, sample voltage value can become and equal reference voltage V rEF.Therefore,
V FB＝V REF (5)
Combination equation 4 and 5, can obtain following formula:
V o = k × V REF + 1 n V D 1 - V D 2 - I o × R eq - - - ( 6 )
Based on equation 6, output voltage reduces along with the increase of output current.In addition, control program as above is conventionally due to the change of the forward voltage of diode D2 and output voltage is had to poor adjustment.
In addition, if power converting system 2000 operation in interrupted conduction mode (DCM), output current also can be adjusted, to obtain constant output current.As shown in Figure 6, output current equals the electric current I of secondary winding 2012 in each switch periods secmean value, as follows:
I o = 1 2 × I sec _ pk × T Demag T s - - - ( 7 )
Therefore, I o = 1 2 × N × 1 T × ∫ 0 T V cs _ pk R s × T Demag T s dt - - - ( 8 )
Wherein, N represents the turn ratio between armature winding 2010 and secondary winding 2012.Particularly, N equals the number of turn of armature winding 2010 divided by the number of turn of secondary winding 2012.In addition, T represents integration period, and T srepresent the switch periods reciprocal of the switching frequency that equals power converting system 2000.For example, T is equal to or greater than T s.In addition R, srepresent the resistance value of current-sense resistor 2030.And, V cs_pkrepresent the voltage V that current-sense resistor 2030 senses in each switch periods cspeak value, and T demagrepresent the duration of demagnetization processing in each switch periods.According to certain conventional art, output current can depend on the inductance of armature winding; Therefore, output current stands large variation conventionally, and it conventionally can not effectively be compensated in production in enormous quantities.
Therefore, wish very much to improve the technology for output voltage adjustment and output current control, for example, very wish to carry out armature winding inductance compensation.
Summary of the invention
The present invention relates to integrated circuit.More specifically, the invention provides the system and method for constant voltage mode and constant current mode.As just example, the present invention has been applied to having the flyback power supply converter of primary side sensing and adjustment.But will recognize, the present invention has much wide range of application.
According to an embodiment, a kind ofly comprise first signal maker for adjusting the system of supply convertor, be configured at least receive input signal and at least generate and the first output signal being associated and the second output signal being associated with sampling of demagnetizing.In addition, this system comprises sampling component, be configured at least receive input signal and the second output signal, at least the information based on being associated with the second output signal is carried out sampled input signal, and at least generates and one or more the 3rd output signals that are associated through sample size.In addition, this system comprises error amplifier, is configured at least receive the 3rd output signal and first threshold voltage and at least generates the 4th output signal by capacitor, and this capacitor is coupled to this error amplifier.In addition, this system comprises compensation assembly, is configured at least receive the 4th output signal and at least generates compensating signal.Input signal is the combination of compensating signal and the first sensing signal.The first sensing signal is associated with the first winding of the secondary winding that is coupled to supply convertor, and secondary winding is associated with output current and the output voltage of this supply convertor.In addition, this system comprises the first controller at least adjusting output current.For example, the first controller is configured at least receive the first output signal and the 3rd output signal, and at least the information based on being associated with the first output signal and the 3rd output signal at least generates the first control signal.In addition, this system comprises the second controller at least adjusting output voltage.For example, second controller be configured at least receive the 4th output signal and at least the information based on being associated with the 4th output signal at least generate the second control signal and the 3rd control signal.In addition, this system comprises oscillator, be configured at least receive the first control signal and the second control signal and generated clock signal at least, and secondary signal maker, be configured at least receive clock signal, the 3rd control signal and the 4th control signal and at least generate modulation signal.In addition, this system comprises gate driver, is configured at least receive modulation signal and drives signal to export to switch to major general.For example, this switch is configured to the first electric current of the armature winding that affecting flows through is coupled to secondary winding.In addition, this system comprises the 3rd controller, at least adjusting peak current.For example, the 3rd controller is configured to receive the 3rd control signal, the second sensing signal and Second Threshold voltage, and the 4th control signal is exported to secondary signal maker.In another example, the second sensing signal is associated with the first electric current of the armature winding of the supply convertor of flowing through.
According to another embodiment, a kind ofly comprise sampling component for the system of adjusting supply convertor, be configured at least receive input signal, sampled input signal, and at least generate and one or more the first output signals that are associated through sample size.For example, input signal is at least associated with the first winding of the secondary winding that is coupled to supply convertor, and secondary winding is relevant with output current and the output voltage of supply convertor.In addition, this system comprises error amplifier, is configured at least receive the first output signal and threshold voltage and generates the second output signal by capacitor, and generating the 3rd output signal, and this capacitor is coupled to this error amplifier.In addition, this system comprises feed forward assembly, is configured to receive the 3rd output signal, and Information generation the 4th output signal based on being associated with the 3rd output signal at least; And controller, at least adjusting output voltage.For example, controller is configured at least receive the second output signal and the 4th output signal, and at least generates the first control signal.In addition, this system comprises signal generator, be configured at least receive the first control signal and at least the information based on being associated with the first control signal at least generate modulation signal; And gate driver, be configured at least receive modulation signal and drive signal to export to switch to major general.For example, this switch is configured to the first electric current of the armature winding that affecting flows through is coupled to secondary winding.
According to another embodiment, a kind ofly comprise sampling component for the system of adjusting supply convertor, be configured at least receive input signal, sampled input signal, and at least generate and one or more the first output signals that are associated through sample size; And error amplifier, be configured at least receive the first output signal and threshold voltage and generate the second output signal by capacitor, and generating the 3rd output signal, this capacitor is coupled to this error amplifier.In addition, this system comprises feed forward assembly, is configured to receive the 3rd output signal, and Information generation the 4th output signal based on being associated with the 3rd output signal at least; And controller, be configured at least receive the second output signal and the 4th output signal, and at least generate control signal.In addition, this system comprises compensation assembly, be configured at least receive the second output signal and at least the information based on being associated with the second output signal at least generate compensating signal, input signal is the combination of compensating signal and another signal.
According to another embodiment, a kind ofly comprise first signal maker for adjusting the system of supply convertor, be configured at least receive input signal and at least generate and the first output signal being associated and the second output signal being associated with sampling of demagnetizing.For example, input signal is at least associated with the first winding of the secondary winding that is coupled to supply convertor, and secondary winding is relevant with output current and the output voltage of supply convertor.In addition, this system comprises sampling component, be configured at least receive input signal and the second output signal, at least the information based on being associated with the second output signal is carried out sampled input signal, and at least generates and one or more the 3rd output signals that are associated through sample size.In addition, this system comprises the first controller, for at least adjusting output current, this first controller is configured at least receive the first output signal and the 3rd output signal, and at least the information based on being associated with the first output signal and the 3rd output signal at least generates the first control signal.In addition, this system comprises oscillator, be configured at least receive the first control signal and at least the information based on being associated with the first control signal carry out at least generated clock signal; And secondary signal maker, be configured at least receive clock signal and the second control signal, and at least the information based on being associated with clock signal and the second control signal at least generates modulation signal.In addition, this system comprises gate driver, is configured at least receive modulation signal and drives signal to export to switch to major general.For example, switch is configured to the first electric current of the armature winding that affecting flows through is coupled to secondary winding.In addition, this system comprises the 3rd controller at least adjusting peak current, is configured at least receive sensing signal and threshold voltage, and the second control signal is exported to secondary signal maker.For example, sensing signal is associated with the first electric current of the armature winding of the supply convertor of flowing through.Modulation signal is corresponding to switching frequency, and the first output signal is corresponding to demagnetization pulse duration.
According to another embodiment, a kind ofly comprise the controller at least adjusting peak current for adjusting the system of supply convertor.For example, controller is configured at least receive sensing signal and first threshold signal and at least generates the first control signal, and sensing signal is associated with the first electric current of the armature winding of the supply convertor of flowing through.In addition, this system comprises signal generator, is configured at least receive the first control signal and at least generates modulation signal; And gate driver, be configured at least receive modulation signal and drive signal to export to switch to major general.For example, this switch is configured to affect the first electric current.In another example, this controller comprises the first comparator, is configured to receive sensing signal and first threshold voltage, and the Information generation comparison signal based on being associated with sensing signal and first threshold voltage at least; And charge pump, be configured to receive comparison signal and at least the information based on being associated with comparison signal generate the 3rd control signal.In addition, this controller comprises threshold value maker, is configured to receive the second control signal and the Information generation Second Threshold voltage based on being associated with the second control signal at least; And second comparator, be configured to receive Second Threshold voltage and sensing signal, and Information generation the first control signal based on being associated with Second Threshold voltage and sensing signal at least.
According to another embodiment, a kind of for adjust the method for supply convertor comprise by first signal maker at least receive input signal and at least the information based on being associated with input signal at least generate and the first output signal being associated and the second output signal being associated with sampling of demagnetizing.In addition, the method comprises by sampling component and at least receives input signal and the second output signal, at least the information based on being associated with the second output signal is carried out sampled input signal, and at least generates and one or more the 3rd output signals that are associated through sample size; At least received the 3rd output signal and first threshold voltage and at least generated the 4th output signal by capacitor by error amplifier, this capacitor is coupled to this error amplifier.In addition, the method comprise by compensation assembly at least receive the 4th output signal and at least the information based on being associated with the 4th output signal at least generate compensating signal.For example, input signal is the combination of compensating signal and the first sensing signal.In another example, the first sensing signal is associated with the first winding of the secondary winding that is coupled to supply convertor, and secondary winding is associated with output current and the output voltage of this supply convertor.In addition, the method comprises by least receive the first output signal and the 3rd output signal for the first controller of at least adjusting output current, and at least the information based on being associated with the first output signal and the 3rd output signal at least generates the first control signal; By the second controller at least adjusting output voltage at least receive the 4th output signal and at least the information based on being associated with the 4th output signal at least generate the second control signal and the 3rd control signal.In addition, the method comprises by oscillator and at least receives the first control signal and the second control signal and by least generated clock signal of this oscillator; Come at least receive clock signal, the 3rd control signal and the 4th control signal and at least generate modulation signal by this secondary signal maker by secondary signal maker.In addition, the method comprises by gate driver and at least receives modulation signal and drive signal to export to switch with flow through the first electric current of the armature winding that is coupled to secondary winding of impact to major general; By receiving the 3rd control signal, the second sensing signal and Second Threshold voltage for the 3rd controller of at least adjusting peak current, and the 4th control signal is exported to secondary signal maker.For example, the second sensing signal is associated with the first electric current of the armature winding of the supply convertor of flowing through.
According to another embodiment, a kind ofly comprise by sampling component and at least receive input signal for adjusting the method for supply convertor.For example, input signal is at least associated with the first winding of the secondary winding that is coupled to supply convertor, and secondary winding is relevant with output current and the output voltage of supply convertor.In addition, the method comprises by sampling component samples to input signal, at least generates and one or more the first output signals that are associated through sample size; At least received the first output signal and threshold voltage and generated the second output signal by capacitor by error amplifier, this capacitor is coupled to this error amplifier.In addition, the method comprises by error amplifier and generates the 3rd output signal; Receive the 3rd output signal by feed forward assembly, and Information generation the 4th output signal based on being associated with the 3rd output signal at least; At least receive the second output signal and the 4th output signal by the controller at least adjusting output voltage, and at least the information based on being associated with the second output signal and the 4th output signal at least generates the first control signal.In addition, the method comprise by signal generator at least receive the first control signal and at least the information based on being associated with the first control signal at least generate modulation signal; At least receive modulation signal and drive signal to export to switch to major general by gate driver and affect the first electric current of the armature winding that is coupled to secondary winding of flowing through.
According to another embodiment, a kind ofly comprise by sampling component and at least receive input signal for adjusting the method for supply convertor, by this sampling component sampled input signal, and at least generate and one or more the first output signals that are associated through sample size.In addition, the method comprise by error amplifier at least receive the first output signal and threshold voltage and at least the information based on being associated with the first output signal and threshold voltage generate the second output signal by capacitor, and at least Information generation the 3rd output signal based on being associated with the first output signal and threshold voltage, this capacitor is coupled to this error amplifier.In addition, the method comprises by feed forward assembly and receives the 3rd output signal, and Information generation the 4th output signal based on being associated with the 3rd output signal at least; At least receive the second output signal and the 4th output signal by controller, and at least the information based on being associated with the second output signal and the 4th output signal at least generates control signal.In addition, the method comprise by compensation assembly at least receive the second output signal and at least the information based on being associated with the second output signal at least generate compensating signal, input signal is the combination of compensating signal and another signal.
According to another embodiment, a kind ofly comprise by first signal maker and at least receive input signal for adjusting the method for supply convertor.For example, input signal is at least associated with the first winding of the secondary winding that is coupled to supply convertor, and secondary winding is relevant with output current and the output voltage of supply convertor.In addition, the method comprises that at least the information based on being associated with input signal at least generates and the first output signal being associated and the second output signal being associated with sampling of demagnetizing; At least receive input signal and the second output signal by sampling component, at least the information based on being associated with the second output signal is carried out sampled input signal, and at least generates and one or more the 3rd output signals that are associated through sample size.In addition, the method comprises by least receive the first output signal and the 3rd output signal for the first controller of at least adjusting output current, and at least the information based on being associated with the first output signal and the 3rd output signal at least generates the first control signal; By oscillator at least receive the first control signal and at least the information based on being associated with the first control signal carry out at least generated clock signal.In addition, the method comprises by secondary signal maker comes at least receive clock signal and the second control signal, and at least the information based on being associated with clock signal and the second control signal at least generates modulation signal; At least receive modulation signal and drive signal to export to switch with flow through the first electric current of the armature winding that is coupled to secondary winding of impact to major general by gate driver.In addition, the method comprises by least receiving sensing signal and threshold voltage for the 3rd controller of at least adjusting peak current, and the second control signal is exported to secondary signal maker.Sensing signal is associated with the first electric current of the armature winding of the supply convertor of flowing through, and modulation signal is corresponding to switching frequency, and the first output signal is corresponding to demagnetization pulse duration.
According to another embodiment, a kind ofly comprise by the controller at least adjusting peak current and at least receive sensing signal and first threshold signal for adjusting the method for supply convertor.For example, sensing signal is associated with the first electric current of the armature winding of the supply convertor of flowing through.In addition, the method comprises that at least the information based on being associated with sensing signal and first threshold voltage at least generates the first control signal; By signal generator at least receive the first control signal and at least the information based on being associated with the first control signal at least generate modulation signal; At least receive modulation signal and drive signal to export to switch to affect the first electric current to major general by gate driver.Comprise by the first comparator and receive sensing signal and first threshold voltage at least generating the processing of the first control signal, and the Information generation comparison signal based on being associated with sensing signal and first threshold voltage at least; By charge pump receive comparison signal and at least the information based on being associated with comparison signal generate the second control signal; Passing threshold maker receives the second control signal and the Information generation Second Threshold voltage based on being associated with the second control signal at least; Receive Second Threshold voltage and sensing signal by the second comparator, and Information generation the first control signal based on being associated with Second Threshold voltage and sensing signal at least.
Compared with conventional art, many benefits are obtained by the present invention.Some embodiment of the present invention can reduce part counting and/or reduce system cost.Some embodiments of the present invention can improve reliability and/or efficiency.Some embodiment of the present invention can simplify the circuit design in switching mode flyback power supply converter.Some embodiments of the present invention provide primary side sensing and adjustment scheme.For example, primary side sensing and adjustment scheme can be improved adjustment of load.In another example, primary side sensing and adjustment scheme can compensate the variation of armature winding inductance to obtain constant output current in the inverse excitation type converter that adopts primary side adjustment.Some embodiment of the present invention can provide the constant output current not changing along with the change of armature winding inductance in CC pattern.
According to another embodiment, a kind ofly comprise for the system of adjusting supply convertor: first signal maker, is configured to receive the first sensing signal and generates and the output signal of demagnetizing and being associated.Described the first sensing signal is relevant with the first winding of secondary winding that is coupled to supply convertor, and described secondary winding is at least associated with the output current of described supply convertor.In addition, this system comprises ramp signal maker, is configured to receive described output signal and generates ramp signal; And first comparator, be configured to receive described ramp signal and first threshold signal, and at least based on Information generation first comparison signal of described ramp signal and described first threshold signal correction connection.In addition, this system comprises the second comparator, be configured to receive the second sensing signal and Second Threshold signal and generate the second comparison signal, described the second sensing signal is associated with the first electric current of the armature winding of the secondary winding that is coupled to described supply convertor of flowing through.In addition, this system comprises secondary signal maker, is configured at least receive described the first comparison signal and described the second comparison signal and generates modulation signal; And gate driver, be configured to receive described modulation signal and to switch output drive signal.Described switch is configured to affect described first electric current of the described armature winding of flowing through.Described output signal was associated with the demagnetization duration, and described driving signal is associated with switch periods.This system is also configured to make described demagnetization duration and the ratio of described switch periods to keep constant.
According to another embodiment, a kind of for adjust the method for supply convertor comprise receive the first sensing signal.Described the first sensing signal is associated with the first winding of the secondary winding that is coupled to supply convertor, and described secondary winding is at least relevant with the output current of described supply convertor.In addition, the method comprises at least Information generation output signal based on being associated with described the first sensing signal.Described output signal is associated with demagnetization.In addition, the method comprises the described output signal of reception; At least Information generation ramp signal based on being associated with described output signal; Receive described ramp signal and first threshold signal; Process the information with described ramp signal and described first threshold signal correction connection; At least based on Information generation first comparison signal of described ramp signal and described first threshold signal correction connection.In addition, the method comprises reception the second sensing signal and Second Threshold signal.Described the second sensing signal is associated with the first electric current of the armature winding of the secondary winding that is coupled to described supply convertor of flowing through.In addition, the method comprises the information of processing with described the second sensing signal and described Second Threshold signal correction connection; At least based on Information generation second comparison signal of described the second sensing signal and described Second Threshold signal correction connection; Receive described the first comparison signal and described the second comparison signal; Process the information being associated with described the first comparison signal and described the second comparison signal; At least Information generation modulation signal based on being associated with described the first comparison signal and described the second comparison signal.In addition, the method comprises the described modulation signal of reception; At least come to switch output drive signal, to affect described first electric current of the described armature winding of flowing through based on the information being associated with described modulation signal.Described output signal was associated with the demagnetization duration, and described driving signal is associated with switch periods.Make described demagnetization duration and the ratio of described switch periods keep constant.
According to another embodiment, a kind ofly comprise first signal maker for adjusting the system of supply convertor, be configured at least receive input signal and at least generate the output signal being associated with demagnetization, described input signal is at least associated with the output current of supply convertor.In addition, this system comprises the first controller, be configured at least receive described output signal, and at least the information based on being associated with described output signal at least generates the first control signal; Second controller, is configured to receive the first sensing signal and first threshold signal and generates the second control signal.Described the first sensing signal is associated with the first electric current of the armature winding of the described supply convertor of flowing through.In addition, this system comprises oscillator, is configured at least receive described the first control signal, and at least the information based on being associated with described the first control signal is carried out at least generated clock signal; Secondary signal maker, is configured at least receive described clock signal and described the second control signal, and at least generates modulation signal.In addition, this system comprises gate driver, is configured at least receive described modulation signal and at least output drive signal of switch.Described switch is configured to affect described first electric current of the described armature winding of flowing through.Described output signal was associated with the demagnetization duration, and described driving signal is associated with switch periods.This system is also configured to make described demagnetization duration and the ratio of described switch periods to keep constant, and makes the peak value of described the first sensing signal keep in size constant.
According to another embodiment, a kind ofly comprise for the method for adjusting supply convertor: at least receive input signal, and at least the information based on being associated with described input signal is carried out at least generating output signal.Described input signal is at least relevant with the output current of supply convertor, and described output signal is relevant with demagnetization.In addition, the method comprises and at least receives described output signal; Process the information being associated with described output signal; At least the information based on being associated with described output signal is carried out at least generated clock signal.In addition, the method comprises reception sensing signal and threshold signal.Described sensing signal is associated with the first electric current of the armature winding of the described supply convertor of flowing through.In addition, the method comprises the information being associated with described sensing signal and described threshold signal of processing; At least Information generation control signal based on being associated with described sensing signal and described threshold signal; At least receive described clock signal and described control signal; Process the information being associated with described clock signal and described control signal; At least the information based on being associated with described clock signal and described control signal at least generates modulation signal.In addition, the method comprises and at least receives described modulation signal; At least the information based on being associated with described modulation intelligence is at least output drive signal of switch, to affect described first electric current of the described armature winding of flowing through.Described output signal was associated with the demagnetization duration, and described driving signal is associated with switch periods.Make described demagnetization duration and the ratio of described switch periods keep constant, and make the peak value of described the first sensing signal keep in size constant.
According to another embodiment, a kind ofly comprise first signal maker for adjusting the system of supply convertor, be configured to receive the first sensing signal and generate and first output signal of demagnetizing and being associated.Described the first sensing signal is relevant with the first winding of secondary winding that is coupled to supply convertor, and described secondary winding is at least associated with the output current of described supply convertor.In addition, this system comprises the first ramp signal maker, is configured to receive described the first output signal and generates the first ramp signal; The first comparator, is configured to receive described the first ramp signal and first threshold signal, and at least based on Information generation first comparison signal of described the first ramp signal and described first threshold signal correction connection.In addition, this system comprises peak detector, is configured to receive driving signal and the second sensing signal and generates peak signal.Described the second sensing signal is associated with the first electric current of the armature winding of the secondary winding that is coupled to described supply convertor of flowing through.In addition, this system comprises amplifier, is configured to receive described peak signal and Second Threshold signal and generates the second output signal by capacitor, and described capacitor is coupled to described amplifier; The second comparator, is configured to receive described the second output signal and the second ramp signal, and generates the second comparison signal.In addition, this system comprises secondary signal maker, is configured at least receive described the first comparison signal and described the second comparison signal, and generates modulation signal; And gate driver, be configured to receive described modulation signal and export described driving signal to described peak detector and switch.Described switch is configured to affect described first electric current of the described armature winding of flowing through.
According to another embodiment, a kind of for adjust the method for supply convertor comprise receive the first sensing signal.Described the first sensing signal is associated with the first winding of the secondary winding that is coupled to supply convertor, and described secondary winding is at least relevant with the output current of described supply convertor.In addition, the method comprises at least Information generation the first output signal based on being associated with described the first sensing signal; Receive described the first output signal; At least Information generation the first ramp signal based on being associated with described the first output signal.Described the first output signal is relevant with demagnetization.In addition, the method comprises described the first ramp signal of reception and first threshold signal; Process the information with described the first ramp signal and described first threshold signal correction connection; At least based on Information generation first comparison signal of described the first ramp signal and described first threshold signal correction connection; Receive and drive signal and the second sensing signal.Described the second sensing signal is associated with the first electric current of the armature winding of the secondary winding that is coupled to described supply convertor of flowing through.In addition, the method comprises the information being associated with described driving signal and described the second sensing signal of processing; At least Information generation peak signal based on being associated with described driving signal and described the second sensing signal; Receive described peak signal and Second Threshold signal; Process the information with described peak signal and described Second Threshold signal correction connection; At least based on Information generation second output signal of described peak signal and described Second Threshold signal correction connection.In addition, the method comprises described the second output signal of reception and the second ramp signal; Process the information being associated with described the second output signal and described the second ramp signal; At least Information generation the second comparison signal based on being associated with described the second output signal and described the second ramp signal.In addition, the method comprises described the first comparison signal of reception and described the second comparison signal; Process the information being associated with described the first comparison signal and described the second comparison signal; At least Information generation modulation signal based on being associated with described the first comparison signal and described the second comparison signal.In addition, the method comprises the described modulation signal of reception; And at least the information based on being associated with described modulation signal is exported described driving signal, to affect described first electric current of the described armature winding of flowing through.
According to another embodiment, a kind ofly comprise first signal maker for adjusting the system of supply convertor, be configured to receive the first sensing signal and generate and the output signal of demagnetizing and being associated.Described the first sensing signal is associated with the first winding of the secondary winding that is coupled to supply convertor, and described secondary winding is at least relevant with the output current of described supply convertor.In addition, this system comprises peak detector, is configured to receive driving signal and the second sensing signal and generates peak signal.Described the second sensing signal is associated with the first electric current of the armature winding of the secondary winding that is coupled to described supply convertor of flowing through.In addition, this system comprises secondary signal maker, is configured at least process the information being associated with described output signal and described peak signal, and generates modulation signal.In addition, this system comprises gate driver, is configured to receive described modulation signal and exports described driving signal to described peak detector and switch.Described switch is configured to affect described first electric current of the described armature winding of flowing through.Described output signal was associated with the demagnetization duration, and described driving signal is associated with switch periods.This system is also configured to make described demagnetization duration and the ratio of described switch periods to keep constant; And make the mean size of described peak signal keep constant at the first duration.
According to another embodiment, a kind of for adjust the method for supply convertor comprise receive the first sensing signal.Described the first sensing signal is associated with the first winding of the secondary winding that is coupled to supply convertor, and described secondary winding is at least relevant with the output current of described supply convertor.In addition, the method comprises at least Information generation output signal based on being associated with described the first sensing signal; Receive and drive signal and the second sensing signal; And process and the information that drives signal and the second sensing signal to be associated.The first sensing signal is associated with demagnetization, and described the second sensing signal is associated with the first electric current of the armature winding of the secondary winding that is coupled to described supply convertor of flowing through.In addition, the method comprises at least Information generation peak signal based on being associated with described driving signal and described the second sensing signal; At least process the information being associated with described output signal and described peak signal; At least Information generation modulation signal based on being associated with described output signal and described peak signal.In addition, the method comprises the described modulation signal of reception; At least the information based on being associated with described modulation signal is exported described driving signal to switch, at least to affect described first electric current of the described armature winding of flowing through.Described output signal was associated with the demagnetization duration, and described driving signal is associated with switch periods.Make described demagnetization duration and the ratio of described switch periods keep constant; And make the mean size of described peak signal keep constant at the first duration.
According to another embodiment, a kind ofly comprise first signal maker for adjusting the system of supply convertor, be configured to receive the first sensing signal and generate and first output signal of demagnetizing and being associated.Described the first sensing signal is relevant with the first winding of secondary winding that is coupled to supply convertor, and described secondary winding is at least associated with the output current of described supply convertor.In addition, this system comprises peak detector, is configured to receive driving signal and the second sensing signal and generates peak signal.Described the second sensing signal is associated with the first electric current of the armature winding of the secondary winding that is coupled to described supply convertor of flowing through.In addition, this system comprises secondary signal maker, is configured to receive described driving signal, described the first output signal and described peak signal, and generates the second output signal; Amplifier, is configured to receive described the second output signal and threshold signal and generates the 3rd output signal by capacitor, and described capacitor is coupled to described amplifier.In addition, this system comprises comparator, is configured to receive described the 3rd output signal and ramp signal, and generates comparison signal; The 3rd signal generator, is configured at least receive described comparison signal and clock signal, and generates modulation signal.In addition, this system comprises gate driver, is configured to receive described modulation signal and exports described driving signal to described peak detector, described secondary signal maker and switch.Described switch is configured to affect described first electric current of the described armature winding of flowing through.
According to another embodiment, a kind of for adjust the method for supply convertor comprise receive the first sensing signal.Described the first sensing signal is relevant with the first winding of secondary winding that is coupled to supply convertor, and described secondary winding is at least associated with the output current of described supply convertor.In addition, the method comprises the first output signal that generation and demagnetization are associated; Receive and drive signal and the second sensing signal.Described the second sensing signal is associated with the first electric current of the armature winding of the secondary winding that is coupled to described supply convertor of flowing through.In addition, the method comprises the information being associated with described driving signal and described the second sensing signal of processing; At least Information generation peak signal based on being associated with described driving signal and described the second sensing signal.In addition, the method comprises reception described driving signal, described the first output signal and described peak signal; Process the information being associated with described driving signal, described the first output signal and described peak signal; At least Information generation the second output signal based on being associated with described driving signal, described the first output signal and described peak signal.In addition, the method comprises described the second output signal of reception and threshold signal; Process the information being associated with described the second output signal and described threshold signal; At least Information generation the 3rd output signal based on being associated with described the second output signal and described threshold signal.In addition, the method comprises described the 3rd output signal and the ramp signal of reception; Process the information being associated with described the 3rd output signal and described ramp signal; At least Information generation comparison signal based on being associated with described the 3rd output signal and described ramp signal.In addition, the method comprises the described comparison signal of reception and clock signal; Process the information being associated with described comparison signal and described clock signal; At least Information generation modulation signal based on being associated with described comparison signal and described clock signal.In addition, the method comprises the described modulation signal of reception; And at least the information based on being associated with described modulation signal is exported described driving signal, to affect described first electric current of the described armature winding of flowing through.
According to another embodiment, a kind ofly comprise first signal maker for adjusting the system of supply convertor, be configured to receive the first sensing signal and generate and first output signal of demagnetizing and being associated.Described the first sensing signal is associated with the first winding of the secondary winding that is coupled to supply convertor, and described secondary winding is at least relevant with the output current of described supply convertor.In addition, this system comprises peak detector, is configured to receive driving signal and the second sensing signal and generates peak signal.Described the second sensing signal is associated with the first electric current of the armature winding of the secondary winding that is coupled to described supply convertor of flowing through, and secondary signal maker is configured at least receive described driving signal, described the first output signal and described peak signal, and generate the second output signal.In addition, this system comprises amplifier, is configured to receive described the second output signal and threshold signal and generates the 3rd output signal by capacitor; The 3rd signal generator, is configured to receive described the 3rd output signal and the first input signal and generates the 4th output signal.Described capacitor is coupled to described amplifier, and described the first input signal is proportional with the second input signal being received by described armature winding.In addition, this system comprises comparator, is configured to receive described the 4th output signal and the second sensing signal and generates comparison signal; The 4th signal generator, is configured at least receive described comparison signal and clock signal and generates modulation signal.In addition, this system comprises gate driver, is configured to receive described modulation signal and exports described driving signal to described peak detector, described secondary signal maker and switch.Described switch is configured to affect described first electric current of the described armature winding of flowing through.
According to another embodiment, a kind of for adjust the method for supply convertor comprise receive the first sensing signal.Described the first sensing signal is associated with the first winding of the secondary winding that is coupled to supply convertor, and described secondary winding is at least relevant with the output current of described supply convertor.In addition, the method comprises the first output signal that generation and demagnetization are associated; Receive and drive signal and the second sensing signal.Described the second sensing signal is associated with the first electric current of the armature winding of the secondary winding that is coupled to described supply convertor of flowing through.In addition, the method comprises the information being associated with described driving signal and the second sensing signal of processing; At least Information generation peak signal based on being associated with described driving signal and described the second sensing signal.In addition, the method comprises reception described driving signal, described the first output signal and described peak signal; Process the information being associated with described driving signal, described the first output signal and described peak signal; At least Information generation the second output signal based on being associated with described driving signal, described the first output signal and described peak signal.In addition, the method comprises described the second output signal of reception and threshold signal; Process the information being associated with described the second output signal and described threshold signal; At least Information generation the 3rd output signal based on being associated with described the second output signal and described threshold signal; Receive described the 3rd output signal and the first input signal.Described the first input signal is proportional with the second input signal being received by described armature winding.In addition, the method comprises the information being associated with described the 3rd output signal and described the first input signal of processing; At least Information generation the 4th output signal based on being associated with described the 3rd output signal and described the first input signal; Receive described the 4th output signal and the second sensing signal; Process the information being associated with described the 4th output signal and described the second sensing signal; At least Information generation comparison signal based on being associated with described the 4th output signal and described the second sensing signal.In addition, the method comprises and at least receives described comparison signal and clock signal; Process the information being associated with described comparison signal and described clock signal; At least Information generation modulation signal based on being associated with described comparison signal and described clock signal.In addition, the method comprises the described modulation signal of reception; And at least the information based on being associated with described modulation signal is exported described driving signal, to affect described first electric current of the described armature winding of flowing through.
According to another embodiment, a kind ofly comprise for the system of adjusting supply convertor: first signal maker, is configured to receive the first sensing signal and generates and first output signal of demagnetizing and being associated.Described the first sensing signal is associated with the first winding of the secondary winding that is coupled to supply convertor, and described secondary winding is at least relevant with the output current of described supply convertor.In addition, this system comprises peak detector, is configured to receive driving signal and the second sensing signal and generates peak signal.Described the second sensing signal is associated with the first electric current of the armature winding of the secondary winding that is coupled to described supply convertor of flowing through.In addition, this system comprises secondary signal maker, is configured at least receive described driving signal, described the first output signal and described peak signal, and generates the second output signal; Amplifier, is configured to receive described the second output signal and threshold signal and generates the 3rd output signal by capacitor, and described capacitor is coupled to described amplifier.In addition, this system comprises the 3rd signal generator, is configured to receive described the first sensing signal, described the 3rd output signal and described driving signal and generates the 4th output signal; Comparator, is configured to receive described the 4th output signal and described the second sensing signal and generates comparison signal.In addition, this system comprises the 4th signal generator, is configured at least receive described comparison signal and clock signal and generates modulation signal; Gate driver, be configured to receive described modulation signal and export described driving signal to described peak detector, described secondary signal maker, described the 3rd signal generator and switch, described switch is configured to affect described first electric current of the described armature winding of flowing through.
According to another embodiment, a kind of for adjust the method for supply convertor comprise receive the first sensing signal.Described the first sensing signal is associated with the first winding of the secondary winding that is coupled to supply convertor, and described secondary winding is at least relevant with the output current of described supply convertor.In addition, the method comprises the first output signal that generation and demagnetization are associated; Receive and drive signal and the second sensing signal.Described the second sensing signal is associated with the first electric current of the armature winding of the secondary winding that is coupled to described supply convertor of flowing through.In addition, the method comprises the information being associated with described driving signal and the second sensing signal of processing; At least Information generation peak signal based on being associated with described driving signal and described the second sensing signal.In addition, the method comprises reception described driving signal, described the first output signal and described peak signal; Process the information being associated with described driving signal, described the first output signal and described peak signal; At least Information generation the second output signal based on being associated with described driving signal, described the first output signal and described peak signal.In addition, the method comprises described the second output signal of reception and threshold signal; Process the information being associated with described the second output signal and described threshold signal; At least Information generation the 3rd output signal based on being associated with described the second output signal and described threshold signal.In addition, the method comprises reception described the first sensing signal, described the 3rd output signal and described driving signal; Process the information with described the first sensing signal, described the 3rd output signal and described driving signal correction connection; At least based on Information generation the 4th output signal of described the first sensing signal, described the 3rd output signal and described driving signal correction connection.In addition, the method comprises described the 4th output signal of reception and described the second sensing signal; Process the information being associated with described the 4th output signal and described the second sensing signal; At least Information generation comparison signal based on being associated with described the 4th output signal and described the second sensing signal.In addition, the method comprises and at least receives described comparison signal and clock signal; Process the information being associated with described comparison signal and described clock signal; At least Information generation modulation signal based on being associated with described comparison signal and described clock signal.In addition, the method comprises the described modulation signal of reception; And at least the information based on being associated with described modulation signal is exported described driving signal, to affect described first electric current of the described armature winding of flowing through.
According to another embodiment, a kind ofly comprise first signal maker for adjusting the system of supply convertor, be configured to receive the first sensing signal and generate and the output signal of demagnetizing and being associated.Described the first sensing signal is associated with the first winding of the secondary winding that is coupled to supply convertor, and described secondary winding is at least relevant with the output current of described supply convertor.In addition, this system comprises peak detector, is configured to receive driving signal and the second sensing signal and generates peak signal.Described the second sensing signal is associated with the first electric current of the armature winding of the secondary winding that is coupled to described supply convertor of flowing through.In addition, this system comprises secondary signal maker, is configured at least process the information being associated with described output signal and described peak signal, and generates modulation signal; And gate driver, be configured to receive described modulation signal and at least export described driving signal to described peak detector and switch.Described switch is configured to affect described first electric current of the described armature winding of flowing through.Described driving signal is associated with switch periods, and described output signal was associated with the demagnetization duration.The described demagnetization duration equals the peak value that demagnetizes after multiplying each other with described peak signal in size.This system is also configured to make described switch periods to keep constant, makes the mean size of described demagnetization peak value keep constant at the first duration, and makes described output current keep constant.
According to another embodiment, a kind of for adjust the method for supply convertor comprise receive the first sensing signal.Described the first sensing signal is associated with the first winding of the secondary winding that is coupled to supply convertor, and described secondary winding is at least relevant with the output current of described supply convertor.In addition, the method comprises the output signal that generation and demagnetization are associated; Receive and drive signal and the second sensing signal.Described the second sensing signal is associated with the first electric current of the armature winding of the secondary winding that is coupled to described supply convertor of flowing through.In addition, the method comprises the information being associated with described driving signal and described the second sensing signal of processing; At least Information generation peak signal based on being associated with described driving signal and described the second sensing signal; Process the information being associated with described output signal and described peak signal; At least Information generation modulation signal based on being associated with described output signal and described peak signal.In addition, the method comprises the described modulation signal of reception; And at least the information based on being associated with described modulation signal is exported described driving signal, to affect described first electric current of the described armature winding of flowing through.Described driving signal is associated with switch periods, and described output signal was associated with the demagnetization duration.The described demagnetization duration equals the peak value that demagnetizes after multiplying each other with described peak signal in size.Make described switch periods keep constant, make the mean size of described demagnetization peak value keep constant at the first duration, and make described output current keep constant.
Depend on embodiment, can obtain one or more in these benefits.Can understand all sidedly these benefits of the present invention and various other object, feature and advantage with reference to the detailed description and the accompanying drawings below.
Accompanying drawing explanation
Fig. 1 is the simplification tradition diagram of the switching mode flyback power supply transformation system for having primary side control.
Fig. 2 illustrates the output voltage of flyback power supply transformation system and the simplification of output current characteristic tradition diagram.
Fig. 3 is the simplification tradition diagram with the switching mode flyback power supply transformation system of primary side sensing and modulation.
Fig. 4 is that another of switching mode flyback power supply transformation system with primary side sensing and modulation simplified traditional diagram.
Fig. 5 is the traditional diagram of another simplification with the switching mode flyback power supply transformation system of primary side sensing and modulation.
Fig. 6 is the simplification diagram that the traditional operation mechanism of flyback power supply transformation system is shown.
Fig. 7 is the simplification diagram according to an embodiment of the invention with the switched-mode power supply transformation system of primary side sensing and adjustment.
Fig. 8 is according to the signal sampling of being carried out by the assembly as a switched-mode power supply transformation system part of the embodiment of the present invention and the simplified timing diagram of maintenance.
Fig. 9 is the simplification diagram that some assembly of adjusting according to the output voltage for switched-mode power supply transformation system of the embodiment of the present invention is shown.
Figure 10 be illustrate as according to the assembly of a switched-mode power supply transformation system part for the embodiment of the present invention for generating the simplification diagram of some equipment of Demag signal.
Figure 11 be illustrate as according to the assembly of a switched-mode power supply transformation system part for the embodiment of the present invention for generating the simplification diagram of some equipment of Sampling_clk signal.
Figure 12 be illustrate as according to the assembly of a switched-mode power supply transformation system part for the embodiment of the present invention for generating the simplified timing diagram of Sampling_clk signal.
Figure 13 is the simplified timing diagram of switched-mode power supply transformation system according to another embodiment of the present invention.
Figure 14 (a) illustrates as according to the simplification diagram of the assembly of part of the switched-mode power supply transformation system of the embodiment of the present invention and some equipment of error amplifier.
Figure 14 (b) illustrates as according to the simplification diagram of some equipment of the current source of a part for the assembly in the switched-mode power supply transformation system of the embodiment of the present invention.
Figure 15 (a) illustrates as the simplification diagram of the assembly of the part of switched-mode power supply transformation system and some equipment of error amplifier according to another embodiment of the present invention.
Figure 15 (b) illustrates as according to the simplification diagram of some equipment of the current source of a part for the assembly in the switched-mode power supply transformation system of the embodiment of the present invention.
Figure 16 is the simplification diagram illustrating as realizing according to the assembly of part of the switched-mode power supply transformation system of the embodiment of the present invention and the CMOS of error amplifier.
Figure 17 illustrates as according to the simplification diagram of some equipment of the assembly of a part for the switched-mode power supply transformation system of the embodiment of the present invention.
Figure 18 illustrates as according to the simplification diagram of some equipment of the assembly of controlling for constant output current (CC) of a part for the switched-mode power supply transformation system of the embodiment of the present invention.
Figure 19 is for the simplified timing diagram by as copy circuit evolving D2C signal according to the pulse of a part for the switched-mode power supply transformation system of the embodiment of the present invention.
Figure 20 illustrates as according to the simplification diagram of some equipment of the assembly of adjusting for current sense (CS) peak value of a part for the switched-mode power supply transformation system 500 of the embodiment of the present invention.
Figure 21 is according to the simplification diagram of the switched-mode power supply transformation system with primary side sensing and adjustment of further embodiment of this invention.
Figure 22 is as according to the simplification diagram of the demagnetization detection components of a switched-mode power supply transformation system part for the embodiment of the present invention.
Figure 23 is according to the simplified timing diagram of the switched-mode power supply transformation system that comprises the demagnetization detection components as shown in Figure 21 and 22 of the embodiment of the present invention.
Figure 24 is the simplification diagram according to another embodiment of the present invention with the switched-mode power supply transformation system of primary side sensing and adjustment.
Figure 25 illustrates as according to the simplification diagram of some equipment of the assembly of adjusting for current sense (CS) peak value of a part for the switched-mode power supply transformation system of the embodiment of the present invention.
Figure 26 is according to the simplified timing diagram of the switched-mode power supply transformation system of the embodiment of the present invention.
Figure 27 be according to certain embodiments of the invention respectively as the simplified timing diagram of assembly of adjusting for current sense (CS) peak value of a switched-mode power supply transformation system part.
Figure 28 is according to the simplification diagram of the switched-mode power supply transformation system with primary side sensing and adjustment of further embodiment of this invention.
Figure 29 is according to the simplified timing diagram of the switched-mode power supply transformation system of the embodiment of the present invention.
Figure 30 is as according to the simplification diagram of the Cycle by Cycle peak value maker of a power converting system part for the embodiment of the present invention.
Figure 31 is as according to the simplified timing diagram of the Cycle by Cycle peak value maker of a power converting system part for the embodiment of the present invention.
Figure 32 is according to the simplification diagram of the switched-mode power supply transformation system with primary side sensing and adjustment of further embodiment of this invention.
Figure 33 is according to the simplification diagram of the switched-mode power supply transformation system with primary side sensing and adjustment of further embodiment of this invention.
Figure 34 is as according to the simplification diagram of the integrator of a power converting system part for the embodiment of the present invention.
Figure 35 is according to the simplified timing diagram of the switched-mode power supply transformation system that comprises the integrator as shown in Figure 33 and 34 of the embodiment of the present invention.
Figure 36 is as according to the simplification diagram of the oscillator of a power converting system part for the embodiment of the present invention.
Figure 37 is according to the simplified timing diagram of the switched-mode power supply transformation system of the embodiment of the present invention.
Figure 38 is according to the simplified timing diagram of some electric current of the switched-mode power supply transformation system of the embodiment of the present invention.
Figure 39 is according to the simplification diagram of the switched-mode power supply transformation system with primary side sensing and adjustment of further embodiment of this invention.
Figure 40 is the simplification diagram for the switched-mode power supply transformation system to light-emitting diode power supply according to further embodiment of this invention.
Figure 41 is according to the simplification diagram of the switched-mode power supply transformation system with primary side sensing and adjustment of further embodiment of this invention.
Figure 42 is according to the simplified timing diagram of the switched-mode power supply transformation system of the embodiment of the present invention.
Figure 43 is the simplification diagram for the switched-mode power supply transformation system to light-emitting diode power supply according to further embodiment of this invention.
Figure 44 is according to the simplification diagram of the switched-mode power supply transformation system with primary side sensing and adjustment of further embodiment of this invention.
Figure 45 is the simplification diagram for the switched-mode power supply transformation system to light-emitting diode power supply according to further embodiment of this invention.
Embodiment
The present invention relates to integrated circuit.More specifically, the invention provides the system and method for constant voltage mode and constant current mode.As just example, the present invention has been applied to having the flyback power supply converter of primary side sensing and adjustment.But will recognize, the present invention has much wide range of application.
Fig. 7 is the simplification diagram according to an embodiment of the invention with the switched-mode power supply transformation system of primary side sensing and adjustment.This diagram is only example, and it should not limit the scope of claim undeservedly.Those skilled in the art will recognize that many variants, substitutions and modifications.
Switched-mode power supply transformation system 500 comprises armature winding 502, secondary winding 504 and auxiliary winding 506.In addition, transformation system 500 comprises resistor 510,512 and 580.In addition, transformation system 500 comprises capacitor 526, switch 550 and diode 554.In addition, transformation system 500 comprises following assembly:
● for generating the assembly 520 of Demag signal and Sampling_clk signal;
● for sampling and keeping the assembly 522 of one or more signals;
● error amplifier 524;
● for the assembly 532 of load compensation;
● the assembly 534 of controlling for constant voltage (CV);
● for generating the assembly 538 of PWM/PFM modulation signal;
● the assembly 540 of adjusting for current sense (CS) peak value;
● the assembly 542 of controlling for constant current (CC);
● for generating the assembly 546 of gate drive signal;
● oscillator 562; And
● for the assembly 568 of feed forward.
In one embodiment, assembly 520,522,532,534,538,540,542,546 and 568, error amplifier 524 and oscillator 562 are positioned on chip 590.For example, chip 590 at least comprises terminal 516,530,552 and 566.Although utilize selected one group of assembly for system 500 to illustrate above, however can also exist manyly substitute, modification and variant.For example, some in assembly can be expanded and/or combine.Other assembly can be inserted in those assemblies above-mentioned.Depend on embodiment, the arrangement of assembly can be exchanged with other assembly being replaced.For example, system 500 is switching mode flyback power supply transformation systems.The further details of these assemblies can, at this specification, more specifically can find below.
As shown in Figure 7, according to embodiments of the invention, output voltage V outprimary side by transformation system 500 is carried out sensing.For example, output voltage V outsensing depend at least in part the turn ratio between secondary winding 504 and auxiliary winding 506.For example, secondary winding 504 is closely coupled to auxiliary winding 506.In another example, secondary winding 504 is to diode 554 transmitted signals 556, and is coupled to the output of transformation system 500 by diode 554.
In one embodiment, the output signal 508 use V of auxiliary winding 506 aUXrepresent.In another embodiment, output signal 508 is through comprising resistor 510 (, R 1) and resistor 512 (, R 2) the processing of voltage divider.Output signal 514 (, V iNV) be fed to terminal 516 (, terminal INV) from this voltage divider.For example, output signal 514 has been carried out load compensation by assembly 532.In another example, be fed to assembly 520 and 522 in both through the signal 514 of compensation.
According to an embodiment, assembly 532 comprises the one or more equipment as shown in Figure 14 (a), 14 (b), 15 (a) and/or 15 (b).According to another embodiment, assembly 520 comprises some equipment as shown in FIG. 10 and 11.For example, Sampling_clk signal is exported to assembly 522 by assembly 520.Utilize Sampling_clk, assembly 522 generates Holding_clk signal.
In one embodiment, assembly 522, and keeps through sampled signal based on Holding_clk signal sampling through compensating signal 514 based on Sampling_clk signal.For example, assembly 522 demagnetization while nearly finishing to sampling through compensating signal 514, and keep through sampled signal until sampling next time.In another example, this sampling and maintenance are processed shown in Figure 8.
In addition, as shown in Figure 7, through the signal V of sampling and maintenance sampbe sent to error amplifier 524 from assembly 522.According to some embodiment, assembly 524 comprises some equipment as shown in Figure 14 (a), 14 (b), 15 (a) and/or 15 (b).Error amplifier 524 also receives reference signal V ref.For example, reference signal V refoutput loading based on transformation system 500 is compensated.In another example, signal V sampby with reference signal V refcompare, and its difference is amplified by error amplifier 524.In one embodiment, error amplifier 524 is by capacitor 526 generating output signals 528.For example, capacitor 526 is connected to error amplifier 524 by terminal 530 (, terminal COMP).In another example, output signal 528 (, V cOMP) reflect loading condition.In another example, V cOMPbe used to affect PWM/PFM switching frequency and PWM/PFM pulsewidth, to adjust output voltage V out.
As shown in Figure 7, output signal 528 is sent to assembly 532 and 534.For example, assembly 534 makes output voltage V in constant voltage (CV) pattern outkeep constant.In another example, control signal 536 is sent to assembly 538 by assembly 534, and control signal 558 is sent to oscillator 562.As response, oscillator 562 is to assembly 538 clock signals 560.
In addition, in one embodiment, error amplifier 524 is also to assembly 568 output signals 570, and as response, assembly 658 generates signal 572 and sends to assembly 534.In another embodiment, assembly 534 receive signal 572 and signal 528 both.
As shown in Figure 7, assembly 520 also sends to assembly 542 by Demag signal, and assembly 542 also receives signal V samp.As response, assembly 542 is exported control signal 592.According to an embodiment, control signal 592 is used to make output current I in constant current (CC) pattern outkeep constant.For example, assembly 542 comprises one or more equipment as shown in figure 17.In another example, assembly 542 carrys out locking switch frequency by oscillator 562 according to armature winding inductance, and therefore compensates the variation of armature winding inductance.In another example, make the output current I in constant current (CC) pattern outbe independent of armature winding inductance.
According to an embodiment, assembly 538 at least receives signal 560,536 and 592, and from the signal 574 of assembly 540.Assembly 540, except receiving beyond the signal 564 from terminal 566 (, terminal CS), also receives Vth_oc.For example, Vth_oc represents predetermined threshold voltage levels.In another example, signal 564 is voltage signals.As response, assembly 538 is exported control signal 544 to assembly 546, assembly 546 and then send and drive signals 548 to switch 550.For example, control signal 544 is modulation signals.In another example, switch is power supply MOSFET.In another example, switch is power supply BJT.In another example, switch is connected to assembly 546 by terminal 552 (, terminal Gate).In another example, drive signal 548 by V gaterepresent.
According to an embodiment, control signal 544 is used to determine ON time and the switching frequency that PWM/PFM controls.For example, larger V cOMPsize can produce longer ON time, and therefore generation is delivered to the higher power level of output.In another example, larger V cOMPsize can produce higher switching frequency, and therefore generation is delivered to the higher power level of output.According to another embodiment, the ON time that PWM/PFM controls is determined by assembly 538, and the switching frequency that PWM/PFM controls is determined by oscillator 562.
As discussed above and here further emphasize, Fig. 7 is only example, and it should not limit the scope of claim undeservedly.Those skilled in the art will recognize that many variants, substitutions and modifications.For example, transformation system 500 also comprises one or more assemblies not shown in Figure 5.In another example, transformation system 500 also comprises one or more connections not shown in Figure 5.In another example, transformation system 500 comprises the one or more assemblies different from the assembly shown in Fig. 5.In another example, transformation system 500 comprises the one or more connections different from the connection shown in Fig. 5.In another example, capacitor 526 can be used to another circuit of loop stability compensation and replace.
Fig. 8 be according to the embodiment of the present invention by the signal sampling of carrying out as the assembly 522 of switched-mode power supply transformation system 500 parts and the simplified timing diagram of maintenance.This diagram is only example, and it should not limit the scope of claim undeservedly.Those skilled in the art will recognize that many variants, substitutions and modifications.
As shown in Figure 8, waveform 610 represents the V as the function of time gate, waveform 620 represents the V as the function of time aUX, waveform 630 represents the V as the function of time iNV, and waveform 660 represents the V as the function of time samp.In addition, waveform 640 represents the Sampling_clk signal as the function of time, and waveform 650 represents the Holding_clk signal as the function of time.
With reference to figure 7, the signal V as shown in waveform 610 gatebe sent to switch 550.For example, according to embodiments of the invention, pass through V at switch 550 gateand after cut-off, be stored in energy in armature winding 502 be just sent to auxiliary winding 506 and secondary winding 504 both.In another example, the signal V as shown in waveform 620 aUXthe signal 556 at simulation secondary winding 504 places.In one embodiment, signal 556 has reflected output voltage V when closing on each demagnetization period finishes out.In another example, the signal V as shown in waveform 630 iNVsimulate the signal V as shown in waveform 620 during the each demagnetization period aUX.
In addition, according to one embodiment of the invention, the pulse that waveform 640 shows signal Sampling_clk is generated in the time that the demagnetization period finishes.According to another embodiment, the pulse that waveform 650 shows signal Holding_clk is generated in the time that the demagnetization period finishes.
According to an embodiment, as shown in waveform 630, signal V iNVtrailing edge at Sampling_clk signal is sampled, and is kept during the remainder of clock cycle.For example, signal V iNVthrough sampling and keep value be used to generate signal V samp.In another example, signal amplitude V areflect the output voltage of assembly 522.
Further emphasize as discussed above and here, Fig. 8 is only example, and it should not limit the scope of claim undeservedly.Those skilled in the art will recognize that many variants, substitutions and modifications.For example, V achange therefore V from a sampling clock cycle to another sampling clock cycle sampalso change from a sampling clock cycle to another sampling clock cycle in size.
Fig. 9 is the simplification diagram that some assembly of adjusting according to the output voltage for switched-mode power supply transformation system 500 of the embodiment of the present invention is shown.This diagram is only example, and it should not limit the scope of claim undeservedly.Those skilled in the art will recognize that many variants, substitutions and modifications.
As shown in Fig. 7 and 9, according to an embodiment, voltage divider receives the signal 508 from auxiliary winding 506, and to terminal INV output signal 514.In another embodiment, signal 514 is carried out load compensation by assembly 532.Through the signal 514 of compensation be fed to assembly 520 and 522 both.
For example, assembly 522 to sampling through compensating signal 514, and keeps through sampled signal until next time sampling in the time closing on demagnetization and finish.Through the signal V of sampling and maintenance sampbe sent to error amplifier 524 from assembly 522, error amplifier 524 also receives reference signal V ref.Signal V sampby with reference signal V refcompare, and its difference is amplified by error amplifier 524.
In one embodiment, error amplifier 524 is by capacitor 526 generating output signals 528.For example, capacitor 526 is connected to error amplifier 524 by terminal 530 (, terminal COMP).In another example, output signal 528 (, V cOMP) reflect loading condition, and affect PWM/PFM switching frequency and PWM/PFM pulsewidth, to adjust output voltage V out.
As shown in Fig. 7 and 9, according to an embodiment, output signal 528 (, V cOMP) be sent to assembly 534.For example, control signal 536 is sent to assembly 538 by assembly 534, and control signal 558 is sent to oscillator 562.In one embodiment, control signal 558 is the electric currents that are injected into oscillator 562.As response, oscillator 562 processing control signals 558 are to determine the frequency of clock signal 560, and to assembly 538 clock signals 560.In another example, assembly 538 receive signal 560 and 536 both, and export control signal 544 to assembly 546.Assembly 546 is processed this control signal 544 to determine PWM/PFM switching frequency and PWM/PFM pulsewidth.In one embodiment, PWM/PFM pulsewidth is used for determining the electric current of armature winding 502.The electric current of armature winding 502 is used to adjust output voltage together with PWM/PFM switching frequency, and in CV pattern, maintains its constant size.
According to an embodiment, if V compsize be less than predetermined value, power converting system 500 is in CV pattern.For example,, if voltage V sampequal in size V ref, V compbe less than predetermined value.In CV pattern, V compbe used for regulating PWM/PFM switching frequency and/or pulsewidth.For example, PWM/PFM switching frequency and PWM/PFM pulsewidth are controlled, to make output voltage V outkeep constant.
According to another embodiment, if V compsize exceed predetermined value, power converting system 500 is in CC pattern.For example,, if voltage V sampin size lower than V ref, V compto exceed predetermined value.In CC pattern, in order to adjust output current I out, voltage V sampbe used to control switch frequency.For example, PWM/PFM switching frequency and V samplinearly proportional, V sampand then and output voltage V outratio.
As discussed above, according to some embodiments of the invention, with reference to figure 7, assembly 520 comprises equipment as shown in FIG. 10 and 11.
Figure 10 be illustrate as according to the assembly 520 of switched-mode power supply transformation system 500 parts for the embodiment of the present invention for generating the simplification diagram of some equipment of Demag signal.This diagram is only example, and it should not limit the scope of claim undeservedly.Those skilled in the art will recognize that many variants, substitutions and modifications.
As shown in Fig. 7 and 10, signal V iNVreceive and compared with two threshold voltages by assembly 520.A threshold voltage is V th1, another threshold voltage is V samp-V th2.V th1and V th2predetermined constant, and V sampthe previous voltage of sampling out receiving from assembly 522.At least in part based on signal V iNVwith the comparison of two threshold voltages, Demag signal is generated.For example, the demagnetization period is detected, to generate Demag signal.
Figure 11 be illustrate as according to the assembly 520 of switched-mode power supply transformation system 500 parts for the embodiment of the present invention for generating the simplification diagram of some equipment of Sampling_clk signal.This diagram is only example, and it should not limit the scope of claim undeservedly.Those skilled in the art will recognize that many variants, substitutions and modifications.
As shown in figure 10, Demag signal is generated.At least in part based on Demag signal, other signal P in1, P in2, S ync1, S ync2, Samp1 and Samp2 are also generated, as shown in figure 11.The Duration Information of Demag signal is integrated device storage.For example, integrator comprises switch and capacitor 910 and 920 (, being respectively capacitor C1 and C2).In another example, the voltage of capacitor C1 and C2 is respectively the V at node 912 places c1v with node 922 places c2.
In one embodiment, switch is by signal P in1and P in2control.The Duration Information of the Demag signal of storing in another embodiment, is used to determine the timing of next pulse of Sampling_clk signal.For example, next pulse of Sampling_clk signal is appearance before the demagnetization period finishes just in time, as shown in Figure 8.In addition, the width of next pulse is determined by monostable (one-shot) device 930.
Figure 12 be illustrate as according to the assembly 520 of switched-mode power supply transformation system 500 parts for the embodiment of the present invention for generating the simplified timing diagram of Sampling_clk signal.This diagram is only example, and it should not limit the scope of claim undeservedly.Those skilled in the art will recognize that many variants, substitutions and modifications.
As shown in figure 12, waveform 1010 represents the Sampling_clk signal as the function of time, and waveform 1020 represents the Tpau signal as the function of time, and waveform 1030 represents the Samp1 signal as the function of time.In addition, waveform 1040 represents the V as the function of time c2.In addition, waveform 1050 represents the S as the function of time ync2signal, waveform 1060 represents the P as the function of time in1signal, and waveform 1070 represents the Demag signal as the function of time.For example, Sampling_clk signal, Tpau signal, Samp1 signal, S ync2signal, P in1signal and Demag signal.
According to an embodiment, the timing of Sampling_clk signal is to determine timing and the duration of the Demag signal interim based on the last week, and P in1and P in2signal each generates the duration of the Demag signal based in current period at least in part.For example, the duration of Demag signal is the pulsewidth of Demag signal as shown in figure 12.According to another embodiment, Samp1 signal has the pulsewidth identical with Samp2 signal.For example, pulsewidth equals the time interval between the cut-off of switch 550 and next sampling.In another example, Samp1 and Samp2 signal are used to determine the timing of Sampling_clk signal.
In one embodiment, P in1relation between signal and Samp2 signal can be described by following poor equation.
βP in1(k-1)-α*Samp 2(k-1)-A*δ(k)＝Samp 2(k) (9)
Wherein, P in1represent P in1signal, and Samp 2represent Samp2 signal.This relation can further be described by Z-transformation below:
βP in1(Z)Z -1-α*Samp 2(Z)Z -1-A＝Samp 2(Z) (10)
With Samp 2 ( Z ) = β * P in 1 ( Z ) Z - - A 1 + α * Z - 1 = β * P in 1 ( Z ) Z - 1 1 + α * Z - 1 - A 1 + α * Z - 1 - - - ( 11 )
Wherein, A is constant initial value.
In addition, Section 2 (time → ∞); Therefore
Samp 2 ≈ β * P in 1 Z - 1 1 + α * Z - 1 - - - ( 12 )
Can find out from equation 12, the pulsewidth of Samp2 signal each cycle according to the last week interim Demag signal duration be updated,
Figure 13 is the simplified timing diagram of switched-mode power supply transformation system 500 according to another embodiment of the present invention.This diagram is only example, and it should not limit the scope of claim undeservedly.Those skilled in the art will recognize that many variants, substitutions and modifications.
As shown in figure 13, waveform 1110 represents the V as the function of time out, waveform 1120 represents the V as the function of time iNV, and waveform 1130 represents the Demag signal as the function of time.In addition, waveform 1140 represents the voltage level as the signal 564 at the terminal CS place of the function of time, and waveform 1150 represents the signal 548 as the terminal Gate place of the function of time.
As discussed above, according to certain embodiments of the invention, with reference to figure 7, assembly 532 comprises the one or more equipment as shown in Figure 14 (a), 14 (b), 15 (a) and/or 15 (b), and assembly 524 comprises some equipment as shown in Figure 14 (a), 14 (b), 15 (a) and/or 15 (b).
Figure 14 (a) illustrates as according to the simplification diagram of some equipment of the assembly 532 of the part of the switched-mode power supply transformation system 500 of the embodiment of the present invention and error amplifier 524.This diagram is only example, and it should not limit the scope of claim undeservedly.Those skilled in the art will recognize that many variants, substitutions and modifications.
As shown in Figure 14 (a), assembly 532 comprises current source 1230, and error amplifier 524 comprises assembly 1210 and trsanscondutance amplifier 1220.For example, assembly 1210 is determined two input signals difference in size.
For example, assembly 1210 receiver voltage signal V sampwith reference signal V ref, and generation size equals V ref-V sampsignal 570.In another example, trsanscondutance amplifier 1220 amplifying signals 570 are with generating output signal 528.According to an embodiment, output signal 528 is received by capacitor 526.For example, capacitor 526 use act on the low pass filter of closed circuit.In addition, provide zero as the assembly 568 of a feed forward path part to closed circuit, to improve the operational stability of transformation system 500.
Current source 1230 generates the electric current I _ COMPEN_P changing along with output loading.Electric current I _ COMPEN_P flow through terminal INV and resistor 512.For example, electric current I _ COMPEN_P is used for voltage drop that compensation causes because of cable and along with output current I outother voltage loss changing.In another example, I_COMPEN_P electric current reaches its maximum in the time of no-load condition, and vanishing in the time of full-load conditions.
According to an embodiment, by load compensation, output voltage V outcan be expressed as follows.
V out = k · V Ref + 1 n V D 1 - k · ICOMPEN _ P · ( R 1 / / R 2 ) - - - ( 13 )
Wherein, n is the turn ratio between auxiliary winding 506 and secondary winding 504.In addition, V d1the forward direction diode drop of diode 554, and
k = R 1 + R 2 n · R 2 - - - ( 14 )
For example, last expression in equation 13 is for offsetting the compensating factor of the voltage drop causing because of cable.
Figure 14 (b) illustrates as according to the simplification diagram of some equipment of the current source 1230 of a part for the assembly 532 in the switched-mode power supply transformation system 500 of the embodiment of the present invention.This diagram is only example, and it should not limit the scope of claim undeservedly.Those skilled in the art will recognize that many variants, substitutions and modifications.
With reference to Figure 14 (a), assembly 532 comprises current source 1230.As shown in Figure 14 (b), current source 1230 comprises that voltage is to current converter 1240, constant-current source 1250 and assembly 1260.For example, assembly 1260 is determined two input signals difference in size.
For example, signal 528 (, V cOMP) receive and be converted into electric current I _ COMPEN by voltage to current converter 1240.In another example, constant-current source 1250 generates constant current Icc.Electric current I cc and I_COMPEN are received by assembly 1260, and assembly 1260 generates electric current I _ COMPEN_P.In one embodiment, electric current I _ COMPEN_P equals Icc-I_COMPEN.In another embodiment, if V cOMPbecome large, electric current I _ COMPEN_P diminishes.
Figure 15 (a) illustrates as the simplification diagram of the assembly 532 of the part of switched-mode power supply transformation system 500 and some equipment of error amplifier 524 according to another embodiment of the present invention.This diagram is only example, and it should not limit the scope of claim undeservedly.Those skilled in the art will recognize that many variants, substitutions and modifications.
As shown in Figure 15 (a), assembly 532 comprises current sink 1330, and error amplifier 524 comprises assembly 1310 and trsanscondutance amplifier 1320.For example, assembly 1310 is determined two input signals difference in size.
For example, assembly 1310 receiver voltage signal V sampwith reference signal V ref, and generation size equals V ref-V sampsignal 570.In another example, trsanscondutance amplifier 1320 amplifying signals 570 are with generating output signal 528.According to an embodiment, output signal 528 is received by capacitor 526.For example, capacitor 526 use act on the low pass filter of closed circuit.In addition, provide zero as the assembly 568 of a feed forward path part to closed circuit, to improve the operational stability of transformation system 500.
Current sink 1330 generates the electric current I _ COMPEN_N changing along with output loading.Electric current I _ COMPEN_N flow through resistor 510 and terminal INV.For example, electric current I _ COMPEN_N is used for voltage drop that compensation causes because of cable and along with output current I outother voltage loss changing.In another example, I_COMPEN_N electric current reaches its maximum in the time of full-load conditions, and vanishing in the time of no-load condition.
Figure 15 (b) illustrates as according to the simplification diagram of some equipment of the current sink 1330 of a part for the assembly 532 in the switched-mode power supply transformation system 500 of the embodiment of the present invention.This diagram is only example, and it should not limit the scope of claim undeservedly.Those skilled in the art will recognize that many variants, substitutions and modifications.
With reference to Figure 15 (a), assembly 532 comprises current sink 1330.As shown in Figure 15 (b), current sink 1330 comprises voltage to current converter 1340 and comprises the current mirror of resistor 1350 and 1360.For example, signal 528 (, V cOMP) receive and be converted into electric current I _ COMPEN by voltage to current converter 1340.In another example, electric current I _ COMPEN is received by current mirror, and current mirror generates electric current I _ COMPEN_N.In one embodiment, electric current I _ COMPEN_N equals m × I_COMPEN, and m is positive integer.In another embodiment, if V cOMPbecome large, electric current I _ COMPEN_N also becomes large.
Figure 16 is the simplification diagram illustrating as realizing according to the CMOS of the assembly 568 of the part of the switched-mode power supply transformation system 500 of the embodiment of the present invention and error amplifier 524.This diagram is only example, and it should not limit the scope of claim undeservedly.Those skilled in the art will recognize that many variants, substitutions and modifications.
Figure 17 illustrates as according to the simplification diagram of some equipment of the assembly 542 of the part of the switched-mode power supply transformation system 500 of the embodiment of the present invention.This diagram is only example, and it should not limit the scope of claim undeservedly.Those skilled in the art will recognize that many variants, substitutions and modifications.
As shown in figure 17, assembly 542 comprises that voltage is to current converter 1510, assembly 1520 and phase-locked loop 1530.For example, assembly 1520 is determined two input signals difference in size.In another example, assembly 1520 receives from voltage and arrives the signal 1512 of current converter 1510 and the signal 1534 from phase-locked loop 1530, and output represents the signal 1522 of the difference of the size of signal 1512 and signal 1534.
As shown in Fig. 7 and 17, assembly 522 sampled signals 514 and generation signal V samp.In addition, Demag signal is generated by assembly 520.In one embodiment, the electric current of the duration of Demag signal and armature winding 502 is proportional and also proportional with the electric current of secondary winding 504.For example, the duration of Demag signal is the pulsewidth of Demag signal as shown in figure 12.
In one embodiment, if signal V sampbe less than in size signal V ref, V compsize exceed predetermined value, and power converting system 500 is in CC pattern.For example, V compsize while reaching its maximum, CC pattern is detected.In another embodiment, in CC pattern, PWM/PFM switching frequency is by voltage V sampcontrol.For example, PWM/PFM switching frequency and V samplinearly proportional, V sampand then and output voltage V outratio.
For example, in CC pattern, the V under interrupted conduction mode (DCM) outprovided by following formula:
Po = Vo * Io = 1 2 η L P F SW I p 2 - - - ( 15 )
Wherein, Po represents the power output of transformation system 500.In addition, Vo and Io represent respectively output voltage V outwith output current I out.In addition, Lp represents the inductance of armature winding 502, and Fsw represents switching frequency, and Ip represents the peak current of armature winding 502.η is constant.
If Fsw and V sampproportional, Fsw is also proportional with Vo, as follows.
F SW＝εVo (16)
Wherein, ε is constant.Combination equation 15 and 16,
Io = 1 2 η L P F SW Vo I p 2 = 1 2 η L P ϵ I p 2 - - - ( 17 )
Due to η and be ε constant, if therefore Ip and Lp are accurately controlled, output current Io is constant.But, if Lp is not accurately controlled, even if Io also may change in CC pattern.
Alternatively, if L p = F SW Vo = α - - - ( 18 )
Wherein, α is constant,
Io = 1 2 ηα I p 2 - - - ( 19 )
Therefore, and if if Ip is accurately controlled equation 18 to be satisfied, can make Io constant.
In addition, for inverse-excitation type operation, according to an embodiment, can pass through inductance L s, the peak current I of secondary winding 504 of secondary winding 504 p_secand output voltage V o determine demagnetization the duration, as follows.For example, the demagnetization duration is identical with the duration (pulsewidth of example Demag signal as shown in figure 12) of Demag signal.
T Demag = Ls × I P _ sec Vo - - - ( 20 )
Due to Ls and Lp is proportional and I p_secproportional with Ip, therefore
T Demag = β Lp × I P Vo - - - ( 21 )
Wherein, β is constant.If met equation 18,
T Demag × F SW = β Lp × I P Vo × F SW = αβ I p - - - ( 22 )
Therefore, if Ip is accurately controlled,
T Demag×F SW＝γ (23)
And I p = γ αβ - - - ( 24 )
Wherein, γ is constant.Combination equation 19 and 24,
Io = 1 2 β ηγ I p - - - ( 25 )
According to an embodiment, as shown in Fig. 7 and 17, in CC pattern, PWM/PFM switching frequency is locked by phase-locked loop 1530.
For example, F SW = γ T Demag - - - ( 26 )
And Io ∝ γ I p(27)
According to another embodiment, by according to equation 26 based on T demagregulate F sw, it is constant that γ keeps.For example, be to be equal to or greater than 0.25 and be equal to or less than 0.75 constant.Therefore, need only according to equation 27 I except γ palso control as constant, output current Io is retained as constant.
For example, assembly 542 carrys out locking switch frequency F according to the inductance of armature winding 502 sW, and therefore compensated the variation of armature winding inductance.In another example, make the output current I in constant current (CC) pattern outbe independent of armature winding inductance.According to an embodiment, as shown in Fig. 7 and 17, oscillator 562 is from the signal 1522 of the assembly 1520 as assembly 542 parts, and to the phase-locked loop 1530 tranmitting data register signals 1532 as assembly 542 parts.
Figure 18 illustrates as according to the simplification diagram of some equipment of the assembly 542 of controlling for constant output current (CC) of a part for the switched-mode power supply transformation system 500 of the embodiment of the present invention.This diagram is only example, and it should not limit the scope of claim undeservedly.Those skilled in the art will recognize that many variants, substitutions and modifications.
As shown in figure 18, assembly 542 comprises pulse copy circuit 1620, phase detectors 1630, charge pump 1640 and self-calibration circuit 1650.In one embodiment, pulse copy circuit 1620 receives from the signal of assembly 520 and from the clock signal 1614 of Clock dividers 1610, and generates signal 1629.Clock signal 1614 use CLK4 represent, and signal 1629 use D2C represent.For example, D2C signal is the copy of Demag signal, but synchronizes with clock signal clk 4.
In another embodiment, pulse copy circuit 1620 comprises NAND (with non-) door 1622, MOS transistor 1624 and 1626, and capacitor 1628.For example, NAND door 1622 receives Demag signal and clock signal 1614, and formation voltage signal D2.As shown in figure 18, voltage signal D2 controls MOS transistor 1624.For example, if signal D2 is logic low, MOS transistor 1624 is passed through electric current I p2capacitor 1628 is charged.In another example, if signal D2 is logic high, MOS transistor 1626 is passed through electric current I n2capacitor 1628 is discharged.According to an embodiment, before being close to such electric discharge, the pulsewidth when voltage of capacitor 1628 has reflected signal D2 low voltage level.According to another embodiment, electric current I p2equal electric current I n2.For example, pulsewidth when, pulsewidth when signal D2 low voltage level is with signal D2C high-voltage level is identical.In another example, the rising edge of signal D2C is synchronizeed with the trailing edge of clock signal 1614.In another example, the rising edge of signal D2C is synchronizeed with the trailing edge of the clock signal 1612 being represented by CLK2.
Figure 19 is for the simplified timing diagram by as generate D2C signal according to the pulse copy circuit 1620 of a part for the switched-mode power supply transformation system 500 of the embodiment of the present invention.This diagram is only example, and it should not limit the scope of claim undeservedly.Those skilled in the art will recognize that many variants, substitutions and modifications.
Waveform 1710 represents the clock signal clk 2 as the function of time, and waveform 1720 represents the clock signal clk 4 as the function of time, and waveform 1730 represents the Demag signal as the function of time.In addition, waveform 1740 represents the D2 signal as the function of time, and waveform 1750 represents the D2C signal as the function of time.
As shown in figure 19, result, the rising edge of D2C signal is synchronizeed with the trailing edge of clock signal clk 2 and the trailing edge of clock signal clk 4.In addition, as shown in figure 19, the pulsewidth of pulsewidth when Demag signal high-voltage level during with D2C signal high-voltage level is identical.
With reference to Figure 18, signal 1629 is outputed to phase detectors 1630 from pulse copy circuit 1620.Phase detectors 1630 comprise d type flip flop 1632.The pulsewidth of for example, pulsewidth when, d type flip flop 1632 is by D2C signal high-voltage level during with clock signal clk 2 low voltage level compared.
In one embodiment, if pulsewidth when pulsewidth when D2C signal high-voltage level is greater than clock signal clk 2 low voltage level, the signal 1634 at Q terminal place is high-voltage level, and the signal 1636 at QN terminal place is low voltage level.In another embodiment, if pulsewidth when pulsewidth when D2C signal high-voltage level is less than clock signal clk 2 low voltage level, the signal 1634 at Q terminal place is low voltage level, and the signal 1636 at QN terminal place is high-voltage level.
As shown in figure 18, signal 1634 and 1636 is received by charge pump 1640.Charge pump 1640 comprises capacitor 1642.For example, capacitor 1642 in response to signal 1634 and 1636 by charge or discharge.In another example, the charging and discharging of capacitor 1642 is used to adjust by I ccthe current signal 1644 representing.
According to an embodiment, current signal 1644 is received by oscillator 562, oscillator 562 generated clock signals 1660.For example, current signal 1644 is used to adjust the bias current of oscillator 562, to adjust the frequency of clock signal 1660.
As discussed above and further emphasize at this, Fig. 7 is only example, and it should not limit the scope of claim undeservedly.Those skilled in the art will recognize that many variants, substitutions and modifications.For example, as shown in figure 18, transformation system 500 comprises Clock dividers 1610, its receive clock signal 1660 and generated clock signal 1612 and 1614.
According to an embodiment, the frequency of clock signal 1612 is half of the frequency of clock signal 1660.According to another embodiment, the frequency of clock signal 1612 is that the twice of frequency of clock signal 1614 is large.For example, as shown in figure 19, the trailing edge of the trailing edge of clock signal 1614 (, clock signal clk 4) and clock signal 1612 (, clock signal clk 2) is synchronous.
Return to Figure 18, clock signal 1612 and 1614 is output to assembly 542 and controls for constant current (CC).For example, clock signal 1532 as shown in figure 17 represents clock signal 1612 and 1614.In another example, although Fig. 7 and 17 does not clearly illustrate Clock dividers 1610, but according to an embodiment, Clock dividers 1610 is parts of transformation system 500.
As response, assembly 542 generates the current signal 1644 being received by oscillator 562.For example, current signal 1644 is signals 1534 as shown in figure 17.According to an embodiment, oscillator 562, Clock dividers 1610 and assembly 542 form loop.
For example, this loop has sufficiently high gain.In another example, this loop become stable after, two double-lengths of the pulsewidth when cycle of clock signal 1612 is locked into Demag signal high-voltage level.In one embodiment, pulsewidth when pulsewidth when Demag signal high-voltage level and clock signal 1612 (, clock signal clk 2) high-voltage level is identical, as shown in figure 19.In another embodiment, the pulsewidth when cycle of clock signal 1612 equals a constant and is multiplied by Demag signal high-voltage level.For example, this constant equals 1/ γ..
In addition, as shown in figure 19 and as discussed above, according to embodiments of the invention, the pulsewidth of pulsewidth when Demag signal high-voltage level during with D2C signal high-voltage level is identical.Therefore, for example, the pulsewidth of pulsewidth when D2C signal high-voltage level during with clock signal clk 2 high-voltage level is identical.
Refer again to Figure 18, self-calibration circuit 1650 is configured to calibration current I p2size and electric current I n2size.For example, electric current I p2size equal electric current I n2size.
According to an embodiment, as shown in figure 18, Demag signal and clock signal clk 4 are fed to the loop that comprises oscillator 562, Clock dividers 1610 and assembly 542.The frequency of this loop adjustment clock signal clk 2, to make the frequency of clock signal clk 2 be locked into the frequency of Demag signal.For example, the frequency of clock signal clk 2 equals to drive the switching frequency of signal 548, as shown in equation 26.
As discussed above, in one embodiment, output current I outthe peak current I of the armature winding 502 while cut-off by switch 550 pdetermine.But, peak current I pmay be due to the propagation delay of control circuit for example, along with ac input voltage (, the VAC in Fig. 7) changes.For example, higher ac input voltage will produce higher peak current I p, vice versa.Therefore, according to an embodiment, regardless of inputting AC voltage, peak current I pall should be accurately controlled in constant level.
Figure 20 illustrates as according to the simplification diagram of some equipment of the assembly 540 of adjusting for current sense (CS) peak value of a part for the switched-mode power supply transformation system 500 of the embodiment of the present invention.This diagram is only example, and it should not limit the scope of claim undeservedly.Those skilled in the art will recognize that many variants, substitutions and modifications.
As shown in figure 20, assembly 540 comprises high-speed comparator 1810, charge pump 1820, dynamic threshold maker 1830 and overcurrent protection (OCP) comparator 1840.
In one embodiment, high-speed comparator 1810, except receiving outside the signal 564 from terminal 566 (, terminal CS), also receives Vth_oc.For example, the electric current of the armature winding 502 of flowing through is by resistor 580 sensings, and the resistance of resistor 580 represents with Rs.As shown in Figure 7, the electric current 582 that its size is represented by the Is resistor 580 of flowing through, and as response, resistor 580 generates the voltage signal 564 that its sizes represent with Vcs.In another example, in the time that switch 550 has just ended, Vcs is compared with Vth_oc.
In another embodiment, high-speed comparator 1810 is compared Vth_oc with signal 564, and generates comparison signal 1812.Comparison signal 1812 is represented by OCP_det.For example, comparison signal 1812 is received by charge pump 1820.In another example, charge pump 1820 comprises RS latch 1822 and capacitor 1824.In one embodiment, RS latch 1822 receives comparison signal 1812, and as the charging and discharging that responds control capacitor 1824.In another embodiment, capacitor 1824 provides voltage signal 1826, and it is received by dynamic threshold maker 1830.
In another embodiment, voltage signal 1826 is converted to current signal by dynamic threshold maker 1830.For example, the current signal after conversion is by current mirror processing, and this current mirror generates dynamic current signal 1832.Dynamic current signal 1832 use Iocp_PWM represent.In another example, current signal 1832 is received by dynamic electric resistor device 1834, and dynamic electric resistor device 1834 is represented by R2.In one embodiment, dynamic electric resistor device 1834 comprises linear resistor 1836 and transistor 1838 and 1839.For example, transistor 1838 and 1839 provides the resnstance transformer relevant with temperature.
In another embodiment, current signal 1832 is converted to voltage signal 1835 by dynamic electric resistor device 1834.Voltage signal 1835 use OCP_ref represent.For example, if Vth_oc is less than voltage signal 564 in size, voltage signal 1835 will be adjusted lowlyer by dynamic threshold maker 1830.In another example, if Vth_oc is greater than voltage signal 564 in size, voltage signal 1835 will be adjusted highlyer by dynamic threshold maker 1830.
As shown in figure 20, voltage signal 1835 is received by overcurrent protection (OCP) comparator 1840.OCP comparator 1840 also receives the signal 564 from terminal 566 (, terminal CS).For example, OCP comparator 1840 is compared OCP_ref with signal 564, and generates signal 574.In another example, signal 574 is received by assembly 538, to adjust the peak current of armature winding 502.
As discussed above, signal 564 is for example compared with Vth_OC by high-speed comparator 1810, and is compared with OCP_ref by OCP comparator 1840.In one embodiment, high-speed comparator 1810, charge pump 1820, dynamic threshold maker 1830, OCP comparator 1840 and other assembly have formed the loop with high-gain.In another embodiment, even if the change of line voltage causes the change of the slope of signal 564, the peak current of armature winding 502 is also maintained at constant level.In another embodiment, even if the propagation delay of PWM/PFM signal changes, the peak current of armature winding 502 is also maintained at constant level.
According to another embodiment, as shown in figure 20, comparison signal 1812 is used to control charge pump 1820, to regulate the voltage signal 1835 being represented by OCP_ref.For example, voltage signal 1835 is as the threshold voltage of OCP comparator 1840.As a result, according to certain embodiments of the invention, the peak current of armature winding 502 is adjusted into peak current is equaled by inner loop
Figure BSA00000443883900411
and the size of pipeline voltage is not how.Therefore,, based on equation 25, constant output current is for example as follows.
Io = 1 2 β ηγ Vth _ oc Rs - - - ( 28 )
In another example, by adjusting by V iNVthe output signal 514 representing is controlled output voltage V o.Therefore, according to some embodiments of the invention, can in CV pattern and CC pattern, obtain respectively constant voltage Vo and constant current Io.For example, CC pattern can be applicable to charge until the voltage of battery reaches pre-sizing for battery.
According to another embodiment, a kind of for the system of adjusting supply convertor (for example, as shown in Figure 7) (for example comprise first signal maker, as shown in assembly 520), be configured at least receive input signal and at least generate the first output signal being associated with demagnetization and the second output signal being associated in sampling.In addition, this system comprises that sampling component (for example, as shown in assembly 522), be configured at least receive input signal and the second output signal, at least the information based on being associated with the second output signal is carried out sampled input signal, and at least generates and one or more the 3rd output signals that are associated through sample size.In addition, this system comprises that error amplifier (for example, as shown in assembly 524), be configured at least receive the 3rd output signal and first threshold voltage and at least generate the 4th output signal by capacitor, this capacitor is coupled to this error amplifier.In addition, this system comprises compensation assembly (for example, as shown in assembly 532), is configured at least receive the 4th output signal and at least generates compensating signal.Input signal is the combination of compensating signal and the first sensing signal.The first sensing signal is associated with the first winding of the secondary winding that is coupled to supply convertor, and secondary winding is associated with output current and the output voltage of this supply convertor.In addition, this system comprises the first controller (for example,, as shown in assembly 542) at least adjusting output current.For example, the first controller is configured at least receive the first output signal and the 3rd output signal, and at least the information based on being associated with the first output signal and the 3rd output signal at least generates the first control signal.In addition, this system comprises the second controller (for example,, as shown in assembly 534) at least adjusting output voltage.For example, second controller be configured at least receive the 4th output signal and at least the information based on being associated with the 4th output signal (for example at least generate the second control signal, as shown in signal 558) and the 3rd control signal (for example,, as shown in signal 536).In addition, this system comprises that oscillator (for example, as shown in assembly 562), be configured at least receive the first control signal and the second control signal and generated clock signal at least, and secondary signal maker (for example, as shown in assembly 538), be configured at least receive clock signal, the 3rd control signal and the 4th control signal and at least generate modulation signal.In addition, this system comprises gate driver (for example, as shown in assembly 546), is configured at least receive modulation signal and drives signal to export to switch to major general.For example, this switch is configured to the first electric current of the armature winding that affecting flows through is coupled to secondary winding.In addition, this system comprises the 3rd controller (for example, as shown in assembly 540), at least adjusting peak current.For example, the 3rd controller is configured to receive the 3rd control signal, the second sensing signal and Second Threshold voltage, and the 4th control signal is exported to secondary signal maker.In another example, the second sensing signal is associated with the first electric current of the armature winding of the supply convertor of flowing through.
For example, this system (for example also comprises feed forward assembly, as shown in assembly 568), from error amplifier (be for example configured to, as shown in assembly 524) reception the 5th output signal, and the 6th output signal is exported to second controller (for example,, as shown in assembly 534).In another example, this system is configured to, in the time that the 4th output signal is greater than predetermined value in size, output current is adjusted into constant current level, and in the time that the 4th output signal is less than this predetermined value in size, output voltage is adjusted into constant voltage level.In another example, sampling component (for example, as shown in assembly 522) be configured to finish be or approach the demagnetization period and income signal is carried out to sampling processing at least one times while finishing in the demagnetization period, generate first through sample size, and keep this first through sample size until second be generated through sample size, first is one or more in sample size two through sample size and second through sample size.In another example, first signal maker (for example, as shown in assembly 520 and as shown in Fig. 7 and 10) be also configured to finish the 3rd output signal, at least the information based on being associated with the 3rd output signal is determined the 3rd threshold voltage, the 3rd threshold voltage and income signal are compared in size, and at least based on Information generation first output signal of the 3rd threshold voltage and income signal correction connection.
According to another embodiment, a kind of for the system of adjusting supply convertor (for example, as shown in Fig. 7 and 9) comprise that sampling component is (for example, as shown in assembly 522), be configured at least receive input signal, sampled input signal, and at least generate and one or more the first output signals that are associated through sample size.For example, input signal is at least associated with the first winding of the secondary winding that is coupled to supply convertor, and secondary winding is relevant with output current and the output voltage of supply convertor.In addition, this system comprises that error amplifier (for example, as shown in assembly 524), be configured at least receive the first output signal and threshold voltage and generate the second output signal by the circuit compensating for loop stability, and generating the 3rd output signal.For example, capacitor (for example, as shown in capacitor 526) during for the circuit of loop stability compensation, and this capacitor is coupled to this error amplifier.In addition, this system comprises feed forward assembly (for example, as shown in assembly 568), is configured to receive the 3rd output signal, and Information generation the 4th output signal based on being associated with the 3rd output signal at least; And controller (for example, as shown in assembly 534), at least adjusting output voltage.For example, controller is configured at least receive the second output signal and the 4th output signal, and at least generates the first control signal.In addition, this system comprises signal generator (for example, as shown in assembly 538), be configured at least receive the first control signal and at least the information based on being associated with the first control signal at least generate modulation signal; And gate driver (for example, as shown in assembly 546), be configured at least receive modulation signal and drive signal to export to switch to major general.For example, this switch is configured to the first electric current of the armature winding that affecting flows through is coupled to secondary winding.
For example, this controller (for example,, as shown in assembly 534) is also configured to, in the time that the second output signal is less than predetermined value in size, output voltage is adjusted into constant voltage level.In another example, this system also comprises compensation assembly (for example, as shown in assembly 532), is configured at least receive the second output signal and the Information generation compensating signal based on being associated with the second output signal at least.For example, the combination of compensating signal and sensing signal when input signal, and sensing signal is at least associated with the first winding that is coupled to secondary winding.
According to another embodiment, a kind of for the system of adjusting supply convertor for example by Fig. 7,14 (a) and 14 (b) or by shown in Fig. 7,15 (a) and 15 (b).This system comprises sampling component (for example, as shown in assembly 522), is configured at least receive input signal, sampled input signal, and at least generate and one or more the first output signals that are associated through sample size; And error amplifier (for example, as shown in assembly 524), be configured at least receive the first output signal and threshold voltage and generate the second output signal by capacitor, and generating the 3rd output signal, this capacitor is coupled to this error amplifier.In addition, this system comprises feed forward assembly (for example, as shown in assembly 568), is configured to receive the 3rd output signal, and Information generation the 4th output signal based on being associated with the 3rd output signal at least; And controller (for example, as shown in assembly 534), be configured at least receive the second output signal and the 4th output signal, and at least generate control signal.In addition, this system comprises that compensation assembly (for example, as shown in assembly 532), be configured at least receive the second output signal and at least the information based on being associated with the second output signal at least generate compensating signal, input signal is the combination of compensating signal and another signal.
For example, voltage signal when the second output signal, and current signal when compensating signal.Another example person, this system also comprises signal generator (for example, as shown in assembly 538), be configured at least reception control signal, and at least the information based on being associated with control signal at least generates modulation signal; And gate driver (for example, as shown in assembly 546), being configured at least receive modulation signal, and driving signal to export to switch to major general, this switch is configured to the flow through electric current of armature winding of supply convertor of impact.
According to another embodiment, a kind of for the system of adjusting supply convertor (for example, as shown in Fig. 7 and 17) (for example comprise first signal maker, as shown in assembly 520), be configured at least receive input signal and at least generate the first output signal being associated with demagnetization and the second output signal being associated with sampling.For example, input signal is at least associated with the first winding of the secondary winding that is coupled to supply convertor, and secondary winding is relevant with output current and the output voltage of supply convertor.In addition, this system comprises that sampling component (for example, as shown in assembly 522), be configured at least receive input signal and the second output signal, at least the information based on being associated with the second output signal is carried out sampled input signal, and at least generates and one or more the 3rd output signals that are associated through sample size.In addition, this system (for example comprises the first controller, as shown in assembly 542), for at least adjusting output current, this first controller is configured at least receive the first output signal and the 3rd output signal, and at least the information based on being associated with the first output signal and the 3rd output signal at least generates the first control signal.In addition, this system comprises oscillator (for example, as shown in assembly 562), be configured at least receive the first control signal and at least the information based on being associated with the first control signal carry out at least generated clock signal; And secondary signal maker (for example, as shown in assembly 538), be configured at least receive clock signal and the second control signal, and at least the information based on being associated with clock signal and the second control signal at least generates modulation signal.In addition, this system comprises gate driver (for example, as shown in assembly 546), is configured at least receive modulation signal and drives signal to export to switch to major general.For example, switch is configured to the first electric current of the armature winding that affecting flows through is coupled to secondary winding.In addition, this system comprises that the 3rd controller at least adjusting peak current (for example, as shown in assembly 540), be configured at least receive sensing signal and threshold voltage, and the second control signal is exported to secondary signal maker (for example,, as shown in assembly 538).For example, sensing signal is associated with the first electric current of the armature winding of the supply convertor of flowing through.Modulation signal is corresponding to switching frequency, and the first output signal is corresponding to demagnetization pulse duration.
For example, switching frequency with demagnetization pulse duration be inversely proportional to, switch periods with demagnetize pulse duration be directly proportional, and output current and peak current proportional.In another example, peak current is constant, and output current is constant.In another example, in the system of claim 12 (for example, as shown in Fig. 7 and 17) in, the first controller (for example, as shown in assembly 542) comprise that voltage is to current converter (for example, as shown in assembly 1510), be configured to finish the 3rd output signal and claim the second electric current; Phase-locked loop (for example, as shown in assembly 1530), is configured at least receive the first output signal and clock signal and generates the 3rd electric current; And definite assembly (for example, as shown in assembly 1520), be configured to receive the second electric current and the 3rd electric current, determine the second electric current and the 3rd electric current difference in size, and Information generation the first control signal based on being associated with the second electric current and the 3rd electric current at least.
According to another embodiment, a kind ofly for example, comprise the controller (for example,, as shown in assembly 540) at least adjusting peak current for adjusting the system (, as shown in Fig. 7 and 20) of supply convertor.For example, controller is configured at least receive sensing signal and first threshold signal and at least generates the first control signal, and sensing signal is associated with the first electric current of the armature winding of the supply convertor of flowing through.In addition, this system comprises signal generator (for example, as shown in assembly 538), is configured at least receive the first control signal and at least generates modulation signal; And gate driver (for example, as shown in assembly 546), be configured at least receive modulation signal and drive signal to export to switch to major general.For example, this switch is configured to affect the first electric current.In another example, this controller (for example, as shown in assembly 540) (for example comprise the first comparator, as shown in assembly 1810), be configured to receive sensing signal and first threshold voltage, and the Information generation comparison signal based on being associated with sensing signal and first threshold voltage at least; And charge pump (for example, as shown in assembly 1820), be configured to receive comparison signal and at least the information based on being associated with comparison signal generate the second control signal.In addition, this controller (for example, as shown in assembly 540) comprise threshold value maker (for example, as shown in assembly 1830), be configured to receive the second control signal and the Information generation Second Threshold voltage based on being associated with the second control signal at least; And second comparator (for example, as shown in assembly 1840), be configured to receive Second Threshold voltage and sensing signal, and Information generation the first control signal based on being associated with Second Threshold voltage and sensing signal at least.
According to another embodiment, a kind of for the method for adjusting supply convertor (for example, as Fig. 7 realize) comprise by first signal maker (for example,, as shown in assembly 520) at least receive input signal and at least the information based on being associated with input signal at least generate and the first output signal being associated and the second output signal being associated with sampling of demagnetizing.In addition, the method by sampling component (for example comprises, as shown in assembly 522) at least receive input signal and the second output signal, at least the information based on being associated with the second output signal is carried out sampled input signal, and at least generates and one or more the 3rd output signals that are associated through sample size; For example, at least received the 3rd output signal and first threshold voltage and at least generated the 4th output signal by capacitor by error amplifier (, as shown in assembly 524), this capacitor is coupled to this error amplifier.In addition, the method comprise by compensation assembly (for example,, as shown in assembly 532) at least receive the 4th output signal and at least the information based on being associated with the 4th output signal at least generate compensating signal.For example, input signal is the combination of compensating signal and the first sensing signal.In another example, the first sensing signal is associated with the first winding of the secondary winding that is coupled to supply convertor, and secondary winding is associated with output current and the output voltage of this supply convertor.In addition, the method by the first controller at least adjusting output current (for example comprises, as shown in assembly 542) at least receive the first output signal and the 3rd output signal, and at least the information based on being associated with the first output signal and the 3rd output signal at least generates the first control signal; By the second controller at least adjusting output voltage (for example, as shown in assembly 534) at least receive the 4th output signal and at least the information based on being associated with the 4th output signal (for example at least generate the second control signal, as shown in signal 558) and the 3rd control signal (for example,, as shown in signal 536).In addition, the method for example comprises, by oscillator (, as shown in assembly 562) and at least receives the first control signal and the second control signal and for example, by least generated clock signal of this oscillator (, as shown in assembly 562); By secondary signal maker (for example, as shown in assembly 538) come at least receive clock signal, the 3rd control signal and the 4th control signal and for example, at least generate modulation signal by this secondary signal maker (, as shown in assembly 538).In addition, the method for example comprises, by gate driver (, as shown in assembly 546) and at least receives modulation signal and drive signal to export to switch with flow through the first electric current of the armature winding that is coupled to secondary winding of impact to major general; For example, receive the 3rd control signal, the second sensing signal and Second Threshold voltage by the 3rd controller at least adjusting peak current (, as shown in assembly 540), and the 4th control signal is exported to secondary signal maker.For example, the second sensing signal is associated with the first electric current of the armature winding of the supply convertor of flowing through.
In another example, the method by feed forward assembly (for example also comprises, as shown in assembly 568) from error amplifier (for example receive, as shown in assembly 524) the 5th output signal, and at least for example come, to second controller (, as shown in assembly 534) output the 6th output signal based on the information being associated with the 5th output signal.In another example, the method is also included in when the 4th output signal is greater than predetermined value in size output current is adjusted into constant current level, and in the time that the 4th output signal is less than predetermined value in size, output voltage is adjusted into constant voltage level.In another example, be included in for the first demagnetization period while finishing or approaching the first demagnetization period sampled input signal while finishing for the processing of sampled input signal, generate with first demagnetize the period corresponding first through sample size, or approach the second demagnetization period sampled input signal while finishing, and generate demagnetize with second that the period is associated second through sample size.First is one or more in sample size two through sample size and second through sample size.In another example, at least generate the processing of the 3rd output signal comprise keep first through sample size until second be generated through sample size.In another example, in the method (for example, as Fig. 7 and 10 realizes) in, comprise reception the 3rd output signal at least generating the processing of the first output signal being associated with demagnetization and the second output signal being associated in sampling, at least the information based on being associated with the 3rd output signal is determined the 3rd threshold voltage, the 3rd threshold voltage and input signal are compared in size, and Information generation the first output signal based on being associated with the 3rd threshold voltage and input signal at least.
According to another embodiment, a kind ofly for example, for example comprise, by sampling component (, as shown in assembly 522) and at least receive input signal for adjusting the method (, as shown in Fig. 7 and 9) of supply convertor.For example, input signal is at least associated with the first winding of the secondary winding that is coupled to supply convertor, and secondary winding is relevant with output current and the output voltage of supply convertor.In addition, the method for example comprises, by sampling component (, as shown in assembly 522) input signal sampling, at least generation and one or more the first output signals that are associated through sample size; For example, at least received the first output signal and threshold voltage and generated the second output signal by capacitor by error amplifier (, as shown in assembly 524), this capacitor is coupled to this error amplifier.In addition, the method comprises by error amplifier and generates the 3rd output signal; Receive the 3rd output signal by feed forward assembly, and Information generation the 4th output signal based on being associated with the 3rd output signal at least; By the controller at least adjusting output voltage (for example, as shown in assembly 534) at least receive the second output signal and the 4th output signal, and at least the information based on being associated with the second output signal and the 4th output signal at least generates the first control signal.In addition, the method comprise by signal generator (for example,, as shown in assembly 538) at least receive the first control signal and at least the information based on being associated with the first control signal at least generate modulation signal; For example, at least receive modulation signal and drive signal to export to switch to major general by gate driver (, as shown in assembly 546) and affect the first electric current of the armature winding that is coupled to secondary winding of flowing through.
For example, the method also comprises if the second output signal is less than predetermined value in size, output voltage is adjusted into constant voltage level.In another example, the method for example comprises, by compensation assembly (, as shown in assembly 532) and at least receives the second output signal, and the Information generation compensating signal based on being associated with the second output signal at least.The combination of compensating signal and sensing signal when input signal, and sensing signal is at least associated with the first winding that is coupled to secondary winding.
According to another embodiment, a kind of for the method for adjusting supply convertor for example by Fig. 7,14 (a) and 14 (b) or by shown in Fig. 7,15 (a) and 15 (b).The method by sampling component (for example comprises, as shown in assembly 522) at least receive input signal, by this sampling component (for example, as shown in assembly 522) sampled input signal, and at least generate and one or more the first output signals that are associated through sample size.In addition, the method by error amplifier (for example comprises, as shown in assembly 524) at least receive the first output signal and threshold voltage and at least the information based on being associated with the first output signal and threshold voltage generate the second output signal by capacitor, and at least Information generation the 3rd output signal based on being associated with the first output signal and threshold voltage, this capacitor is coupled to this error amplifier.In addition, the method for example comprises, by feed forward assembly (, as shown in assembly 568) and receives the 3rd output signal, and Information generation the 4th output signal based on being associated with the 3rd output signal at least; For example, at least receive the second output signal and the 4th output signal by controller (, as shown in assembly 534), and at least the information based on being associated with the second output signal and the 4th output signal at least generates control signal.In addition, the method by compensation assembly (for example comprises, as shown in assembly 532) at least receive the second output signal and at least the information based on being associated with the second output signal at least generate compensating signal, input signal is the combination of compensating signal and another signal.
For example, voltage signal when the second output signal, and compensating signal is current signal.In another example, the method by signal generator (for example also comprises, as shown in assembly 538) reception control signal at least, at least the information based on being associated with control signal at least generates modulation signal, by gate driver (for example, as shown in assembly 546) at least receive modulation signal, and drive signal to export to switch with the flow through electric current of armature winding of supply convertor of impact to major general.
According to another embodiment, a kind ofly for example comprise, by first signal maker (, as shown in assembly 520) and at least receive input signal for the method (for example,, as Fig. 7 and 17 realizes) of adjusting supply convertor.For example, input signal is at least associated with the first winding of the secondary winding that is coupled to supply convertor, and secondary winding is relevant with output current and the output voltage of supply convertor.In addition, the method comprises that at least the information based on being associated with input signal at least generates and the first output signal being associated and the second output signal being associated with sampling of demagnetizing; By sampling component (for example, as shown in assembly 522) at least receive input signal and the second output signal, at least the information based on being associated with the second output signal is carried out sampled input signal, and at least generates and one or more the 3rd output signals that are associated through sample size.In addition, the method by the first controller at least adjusting output current (for example comprises, as shown in assembly 542) at least receive the first output signal and the 3rd output signal, and at least the information based on being associated with the first output signal and the 3rd output signal at least generates the first control signal; By oscillator (for example,, as shown in assembly 562) at least receive the first control signal and at least the information based on being associated with the first control signal carry out at least generated clock signal.In addition, the method by secondary signal maker (for example comprises, as shown in assembly 538) come at least receive clock signal and the second control signal, and at least the information based on being associated with clock signal and the second control signal at least generates modulation signal; For example, at least receive modulation signal and drive signal to export to switch with flow through the first electric current of the armature winding that is coupled to secondary winding of impact to major general by gate driver (, as shown in assembly 546).In addition, the method by the 3rd controller at least adjusting peak current (for example comprises, as shown in assembly 540) at least receive sensing signal and threshold voltage, and the second control signal is exported to secondary signal maker (for example,, as shown in assembly 538).Sensing signal is associated with the first electric current of the armature winding of the supply convertor of flowing through, and modulation signal is corresponding to switching frequency, and the first output signal is corresponding to demagnetization pulse duration.
For example, switching frequency is inversely proportional to demagnetization pulse duration, and output current is directly proportional to peak current.In another example, peak current is constant, and output current is constant.
In another example, for example, by shown in Fig. 7 and 17, comprise by voltage and (for example arrive current converter at least generating the processing of the first control signal, as shown in assembly 1510) receive the 3rd output signal, at least Information generation the second electric current based on being associated with the 3rd output signal, by phase-locked loop (for example, as shown in assembly 1530) at least receive the first output signal and clock signal, and Information generation the 3rd electric current based on being associated with the first output signal and clock signal at least.In addition, for example comprise, by (determining assembly at least generating the processing of the first control signal, as shown in assembly 1520) receive the second electric current and the 3rd electric current, and at least Information generation the first control signal based on being associated with the second electric current and the 3rd electric current, this determines that assembly is configured to determine the second electric current and the 3rd electric current difference in size.
According to another embodiment, a kind of for the method for adjusting supply convertor (for example, as shown in Fig. 7 and 20) for example comprise, by the controller at least adjusting peak current (, as shown in assembly 540) and at least receive sensing signal and first threshold signal.For example, sensing signal is associated with the first electric current of the armature winding of the supply convertor of flowing through.In addition, the method comprises that at least the information based on being associated with sensing signal and first threshold voltage at least generates the first control signal; By signal generator (for example,, as shown in assembly 538) at least receive the first control signal and at least the information based on being associated with the first control signal at least generate modulation signal; For example, at least receive modulation signal and drive signal to export to switch to affect the first electric current to major general by gate driver (, as shown in assembly 546).By the first comparator (for example comprise for the processing that at least generates the first control signal, as shown in assembly 1810) receive sensing signal and first threshold voltage, and the Information generation comparison signal based on being associated with sensing signal and first threshold voltage at least; By charge pump (for example,, as shown in assembly 1820) receive comparison signal and at least the information based on being associated with comparison signal generate the second control signal; Passing threshold maker (for example,, as shown in assembly 1830) receives the second control signal and the Information generation Second Threshold voltage based on being associated with the second control signal at least; For example, receive Second Threshold voltage and sensing signal by the second comparator ((, as shown in assembly 1840)), and Information generation the first control signal based on being associated with Second Threshold voltage and sensing signal at least.
Compared with conventional art, many benefits are obtained by the present invention.Some embodiment of the present invention can reduce part counting and/or reduce system cost.Some embodiments of the present invention can improve reliability and/or efficiency.Some embodiment of the present invention can simplify the circuit design in switching mode flyback power supply converter.Some embodiments of the present invention provide primary side sensing and adjustment scheme.For example, primary side sensing and adjustment scheme can be improved adjustment of load.In another example, primary side sensing and adjustment scheme can compensate the variation of armature winding inductance to obtain constant output current in the inverse excitation type converter that adopts primary side adjustment.Some embodiment of the present invention can provide the constant output current not changing along with the change of armature winding inductance in CC pattern.
With reference to equation 8, if N is constant, in order to make I okeep constant, also should make
Figure BSA00000443883900511
keep constant.Due to R sbe constant, therefore at least exist following method to make
Figure BSA00000443883900512
keep constant:
(a) make V cs_pkkeep constant and make
Figure BSA00000443883900513
keep constant;
(b) make
Figure BSA00000443883900514
keep constant and make
Figure BSA00000443883900515
keep constant; Or
(c) make
Figure BSA00000443883900516
keep constant and make T skeep constant;
Some embodiment of the present invention uses method (a) above, (b) or (c) realizes constant current (CC) pattern, wherein, output current is maintained at constant level, and no matter the inductance level of armature winding, secondary winding and auxiliary winding and output voltage how.
Figure 21 is according to the simplification diagram of the switched-mode power supply transformation system with primary side sensing and adjustment of further embodiment of this invention.This diagram is only example, and it should not limit the scope of claim undeservedly.Those skilled in the art will recognize that many variants, substitutions and modifications.
Power converting system 2100 comprises armature winding 2110, secondary winding 2112, auxiliary winding 2114, resistor 2120,2122 and 2124, switch 2130, demagnetization detection components 2150, current source 2160, current sink 2162, switch 2164 and 2166, NOT (non-) door 2170, capacitor 2172, comparator 2180 and 2182, trigger assembly 2190, and driven unit 2192.For example, demagnetization detection components 2150, current source 2160, current sink 2162, switch 2164 and 2166, NOT door 2170, capacitor 2172, comparator 2180 and 2182, trigger assembly 2190, and driven unit 2192 is positioned on chip 2140.In another example, chip 2140 at least comprises terminal 2142,2144 and 2146.In another example, system 2100 is switching mode flyback power supply transformation systems.
As discussed above and emphasize at this, Figure 21 is only example, and it should not limit the scope of claim undeservedly.Those skilled in the art will recognize that many variants, substitutions and modifications.For example, lead-edge-blanking (leading-edge blanking) assembly is inserted between terminal 2146 and comparator 2180, and the lead-edge-blanking assembly inserting reception outputs to comparator 2180 from the signal of terminal 2146 and by signal 2147.
Figure 22 is as according to the simplification diagram of the demagnetization detection components 2150 of switched-mode power supply transformation system 2100 parts for the embodiment of the present invention.This diagram is only example, and it should not limit the scope of claim undeservedly.Those skilled in the art will recognize that many variants, substitutions and modifications.This demagnetization detection components 2150 comprises comparator 2210, trigger assembly 2220 and 2222, NOT door 2230 and 2232, and AND door 2240.
Figure 23 is according to the simplified timing diagram of the switched-mode power supply transformation system 2100 that comprises the demagnetization detection components 2150 as shown in Figure 21 and 22 of the embodiment of the present invention.This diagram is only example, and it should not limit the scope of claim undeservedly.Those skilled in the art will recognize that many variants, substitutions and modifications.
As shown in figure 23, waveform 2310 represents feedback signal 2143 (for example, the V as the function of time fB), waveform 2320 represents the Demag signal 2151 as the function of time, and waveform 2330 represents ramp signal 2165 (for example, the V as the function of time ramp).In addition, waveform 2340 represents the control signal 2185 as the function of time, and waveform 2350 represents the driving signal 2193 as the function of time, and waveform 2360 represents sensing signal 2147 (for example, the V as the function of time cs).
As shown in Figure 21 and 23, when driving signal 2193 (corresponding to waveform 2350) while being logic high, switch 2130 conductings and being therefore closed.According to an embodiment, the electric current 2111 of the armature winding 2110 of flowing through tilts to rise linearly, and signal 2147 (for example V cs) also tilt to rise linearly.For example, signal 2147 (for example V cs) received by comparator 2180, comparator 2180 is gone back receive threshold signal 2181 (for example V thoc).In another example, comparator 2180 for example, by signal 2147 (V cs) and threshold signal 2181 (for example V thoc) compare, and comparison signal 2187 is exported to trigger assembly 2190.In one embodiment, trigger assembly 2190 also receives the control signal 2185 from comparator 2182, and generates modulation signal 2191.In another embodiment, modulation signal 2191 is received by actuator assembly 2192, and as response, actuator assembly 2192 generates and drives signal 2193.
As shown in waveform 2350 and 2360, for example, if signal 2147 (V cs) reach in size threshold signal 2181 (for example V thoc), drive signal 2193 to become logic low from logic high, and switch 2130 end and is therefore disconnected.For example, in the time that switch 2130 ends, the energy of storing is delivered to the output of power converting system 2100, and beginning is processed in demagnetization.In another example, during demagnetization is processed, the electric current of the armature winding 2112 of flowing through tilts to decline linearly.
As shown in figure 21, output voltage (for example, the V of auxiliary winding 2114 aux) reflect output voltage (for example, the V of power converting system 2100 o), and be converted to feedback signal 2143 (for example, V by resistor 2120 and 2122 fB).For example, feedback signal 2143 (for example, V fB) by receiving as the comparator 2210 of demagnetization detection components 2150 parts.In another example, comparator 2210 for example, by feedback signal 2143 (, V fB) for example, compare with threshold signal 2211 (, 0.1V).
As shown in waveform 2310 and 2320, for example, as feedback signal 2143 (, V fB) rising to threshold signal 2211 (for example, 0.1V) when above, Demag signal 2151 becomes logic high, the beginning that its indication demagnetization is processed.In addition, for example, as feedback signal 2143 (, V fB) dropping to threshold signal 2211 (for example, 0.1V) when following, Demag signal 2151 becomes logic low, the end that its indication demagnetization is processed.For example, when the electric current of the secondary winding 2112 of flowing through drops to when almost nil, demagnetization processing finishes.In another example, after demagnetization processing finishes, power converting system 2100 enters resonance oscillations state, and feedback signal 2143 (for example, V fB) (corresponding to waveform 2310) be approximately sinusoidal wave.
As shown in figure 21, Demag signal 2151 is received by switch 2166 and NOT door 2170, and NOT door 2170 is exported to switch 2164 as response by signal 2171.For example, if Demag signal 2151 is logic high, switch 2164 disconnects and switch 2166 closures.Therefore, according to an embodiment, capacitor 2172 is discharged by current sink 2162, and ramp signal 2165 (for example, V ramp) decline linearly.In another example, if Demag signal 2151 is logic low, switch 2164 closures and switch 2166 disconnect.Therefore, according to another embodiment, capacitor 2172 is charged by current source 2160, and ramp signal 2165 (for example, V ramp) rise linearly.
According to another embodiment, ramp signal 2165 (for example, V ramp) received by comparator 2182, comparator 2182 is gone back receive threshold signal 2183 (for example, V ref).For example, comparator 2182 for example, by ramp signal 2165 (, V ramp) and threshold signal 2183 (for example, V ref) compare, and export control signal 2185 to trigger assembly 2190.As shown in waveform 2330 and 2350, for example, if ramp signal 2165 (, V ramp) reach in size threshold signal 2183 (for example, V ref), drive signal 2193 to become logic high from logic low, and switch 2130 conductings.
As shown in Figure 21,22 and 23, for example, the switch periods of power converting system 2100 is as follows:
T s = I 2 + I 1 I 1 × T Demag - - - ( 29 )
Wherein, T srepresent switch periods, and T demagrepresent the duration that demagnetization is processed.I 2represent the size of the charging current of current source 2160, and I 1represent the size of the discharging current of current sink 2162.
In one embodiment, if
V cs_pk＝V thoc (30)
I p = V thoc R s - - - ( 31 )
Wherein, V cs_pkrepresent signal 2147 (for example V cs) peak value, and V thocrepresent the size of threshold signal 2181.In addition, I pthe peak value of electric current 2111 of armature winding 2110 and R represent to flow through srepresent the resistance value of resistor 2124.In another embodiment, suppose that the efficiency between armature winding 2110 and secondary winding 2112 is 100%, output current is:
I o = 1 2 × N × I p × T Demag T s - - - ( 32 )
Wherein, I orepresent output current, and N represents the turn ratio between armature winding 2110 and secondary winding 2112.Utilize equation 29 and 31, equation 32 becomes:
I o = 1 2 × I 1 I 0 + I 1 × V thoc R s - - - ( 33 )
For example,, based on equation 33, due to I 1, I 2, V thocand R sfor constant, therefore output current I oconstant.In another example, power converting system 2100 intentions make V cs_pkwith
Figure BSA00000443883900545
both keep constant, to make output current I okeep constant.
Figure 24 is the simplification diagram according to another embodiment of the present invention with the switched-mode power supply transformation system of primary side sensing and adjustment.This diagram is only example, and it should not limit the scope of claim undeservedly.Those skilled in the art will recognize that many variants, substitutions and modifications.
Switched-mode power supply transformation system 2400 comprises following assembly:
● for generating the assembly 2420 of Demag signal and Sampling_clk signal;
● for sampling and keeping the assembly 2422 of one or more signals;
● for generating the assembly 2438 of PWM/PFM modulation signal;
● the assembly 2440 of adjusting for current sense (CS) peak value;
● for generating the assembly 2446 of gate drive signal;
● oscillator 2462;
● voltage is to current converter 2510;
● for determining the assembly 2520 of two input signals difference in size;
● Clock dividers 2610;
● pulse copy circuit 2620; And
● phase detectors and charge pump 2635.
In one embodiment, assembly 2420,2422,2438,2440 and 2446, oscillator 2462, voltage is to current converter 2510, assembly 2520, Clock dividers 2610, pulse copy circuit 2620, and phase detectors and charge pump 2635 are positioned on chip 2490.For example, chip 2490 at least comprises terminal 2416,2452 and 2466.
Although utilize selected one group of assembly for system 2400 to illustrate above, however can also exist manyly substitute, modification and variant.For example, some in assembly can be expanded and/or combine.In another example, lead-edge-blanking assembly is inserted between terminal 2466 and assembly 2440, and the lead-edge-blanking assembly inserting reception is exported to assembly 2440 from the signal of terminal 2466 and by signal 2464.Depend on embodiment, the arrangement of assembly can be exchanged with other assembly being replaced.The further details of these assemblies can find in this manual.
For example, switched-mode power supply transformation system 2400 is identical with switched-mode power supply transformation system 500.In another example, chip 2490 is identical with chip 590.In another example, terminal 2416,2452 and 2466 is identical with terminal 516,552 and 566 respectively.
In another example, assembly 2420,2422,2438,2440 and 2446 is identical with assembly 520,522,538,540 and 546 respectively, and oscillator 2462 is identical with oscillator 562.In another example, voltage is identical to current converter 1510 with voltage to current converter 2510, and assembly 2520 is identical with assembly 1520.In another example, Clock dividers 2610 and pulse copy circuit 2620 is identical with pulse copy circuit 1620 with Clock dividers 1610 respectively, and phase detectors and charge pump 2635 comprise phase detectors 1630 and charge pump 1640.Referring back to Figure 17 and 18, according to an embodiment, assembly 542 comprises that voltage is to current converter 1510, assembly 1520 and phase-locked loop 1530, and phase-locked loop 1530 at least comprises pulse copy circuit 1620, phase detectors 1630 and charge pump 1640.
In another example, signal 2414,2444,2448,2460,2464 and 2474 is identical with signal 514,544,548,560,564 and 574 respectively.In another example, signal 2512 and 2522 is identical with signal 1512 and 1522 respectively.In another example, signal 2612,2614,2629,2644 and 2660 is identical with signal 1612,1614,1629,1644 and 1660.
Figure 25 illustrates as according to the simplification diagram of some equipment of the assembly 2440 of adjusting for current sense (CS) peak value of a part for the switched-mode power supply transformation system 2400 of the embodiment of the present invention.This diagram is only example, and it should not limit the scope of claim undeservedly.Those skilled in the art will recognize that many variants, substitutions and modifications.As shown in figure 25, assembly 2440 comprises high-speed comparator 2710, logic control assembly 2722, charge pump 2724, dynamic threshold maker 2730 and overcurrent protection (OCP) comparator 2740.
For example, assembly 2440 comprises the high-speed comparator 2710 identical with high-speed comparator 1810, dynamic threshold maker 1830 and overcurrent protection (OCP) comparator 1840, dynamic threshold maker 2730 and overcurrent protection (OCP) comparator 2740.In another example, logic control assembly 2722 and charge pump 2724 form charge pump 1820.In another example, signal 2464 and 2474 is identical with signal 564 and 574 respectively.In another example, signal 2712,2726 and 2735 is identical with signal 1812,1826 and 1835 respectively.
Return to Figure 24, according to an embodiment, switched-mode power supply transformation system 2400 is flyback power supply converters.In another embodiment, switched-mode power supply transformation system 2400 comprises the one or more assemblies for control switch frequency, and for controlling one or more assemblies of peak current of the armature winding of flowing through.For example, peak current is adjusted to predetermined level, and route of pipe line ac input voltage is not how.
According to another embodiment, the output voltage of switched-mode power supply transformation system 2400 for example, for example, by passing through signal 2414 (, the V of terminal 2416 (, terminal FB) fB) represent.For example, signal 2414 (for example, V fB) sampled and keep by assembly 2422, the output V of assembly 2422 sampreceived to current converter 2510 by voltage.In another example, voltage generates signal 2522 together with assembly 2520 to current converter 2510, and signal 2522 is used for determining the frequency of the signal 2660 that generates of oscillator 2462.
According to another embodiment, signal 2414 (for example, V fB) received by assembly 2420.For example, assembly 2420 is exported Demag signal to pulse copy circuit 2620, and duration (for example, the T of Demag signal indication demagnetization processing demag).In another example, signal is by a phase-locked loop processing, and this phase-locked loop comprises oscillator 2462, Clock dividers 2610, pulse copy circuit 2620, phase detectors and charge pump 2635 and assembly 2520.In another example, the frequency of oscillation of this phase-locked loop conditioning signal 2660, to make
F sw = 1 β × T Demag - - - ( 34 )
Wherein, β is constant.In another example, β equals 2.
Figure 26 is according to the simplified timing diagram of the switched-mode power supply transformation system 2400 of the embodiment of the present invention.This diagram is only example, and it should not limit the scope of claim undeservedly.Those skilled in the art will recognize that many variants, substitutions and modifications.
As shown in figure 26, waveform 2680 represents the signal 2612 (for example, CLK2) as the function of time, and waveform 2682 represents the signal 2614 (for example, CLK4) as the function of time.In addition, waveform 2684 represents the Demag signal as the function of time, and waveform 2686 represents the signal 2629 as the function of time, and waveform 2688 represents the signal 2522 as the function of time.
For example, at the falling edge of signal 2614 (corresponding to waveform 2682), Demag signal (corresponding to waveform 2684) is synchronized to signal 2629 (corresponding to waveform 2686).In another example, at the falling edge of signal 2629 (corresponding to waveform 2686), signal 2612 (corresponding to waveform 2680) is sampled.
According to an embodiment, duration (for example, the T of processing if the value of sampling out from signal 2612, corresponding to logic low, is demagnetized demag) be less than the half period of signal 2612 (corresponding to waveform 2680).According to another embodiment, as response, signal 2522 (corresponding to waveform 2688) reduces in size, thereby causes the frequency of signal 2612 (corresponding to waveform 2680) also to reduce.
Figure 25 and/or Figure 20 show according to some embodiment for adjusting one or more implementations of peak current of armature winding.For example, in constant current (CC) pattern, voltage (for example, the V sensing cs) peak value be adjusted to predetermined level by feedback, and route of pipe line ac input voltage and/or time of delay is not how.
In another example, as shown in figure 25, for example, in the time that mains switch (, switch 550) just ends, signal 2464 (for example, V cs) for example, by comparator 2710 and predetermined threshold signal value (, V th_oc) compare.According to an embodiment, comparator 2710 output signals 2712, for example, so that conditioning signal 2735 (, signal OCP_ref), signal 2735 is used as the threshold voltage of comparator 2740.According to another embodiment, voltage (for example, the V sensing cs) peak value be adjusted to predetermined level (for example, V by such feedback th_oc), to make the output current of switched-mode power supply transformation system 2400 keep constant.
Figure 27 be according to certain embodiments of the invention respectively as the simplified timing diagrams of assembly 540 or 2440 of adjusting for current sense (CS) peak value of switched-mode power supply transformation system 500 or 2400 parts.This diagram is only example, and it should not limit the scope of claim undeservedly.Those skilled in the art will recognize that many variants, substitutions and modifications.
With reference to Figure 27 and 20, according to an embodiment, waveform 2780 represents the signal 560 (for example, CLK) as the function of time, and waveform 2782 represents the signal 564 (for example, CS) as the function of time.According to another embodiment, waveform 2784 represents the signal LEB_b as the function of time, and waveform 2786 represents the signal 1812 (for example, OCP_det) as the function of time.According to another embodiment, waveform 2790 represent as the function of time, as the signal of signal Charge_con_b and signal Charge phase and result (AND) (for example, UP), and waveform 2792 represent as the function of time, as signal Charge_con and signal Charge_b phase and the signal (for example, DOWN) of result.For example, signal Charge and signal Charge_b are short pulse signals.According to another embodiment, waveform 2794 represents signal 1826 (for example, the V as the function of time control), and waveform represents to do the signal 1835 (for example, OCP_ref) of 2796 functions that are the time.
As shown in figure 27, according to an embodiment, for example, if the peak value of signal 564 (corresponding to waveform 2782) (is less than Vth_oc, 0.9V), signal 1812 (corresponding to waveform 2786) is logic low, and signal 1835 (corresponding to waveform 2796) progressively increases.According to another embodiment, for example, if signal 564 (corresponding to waveform 2782) becomes and (is greater than Vth_oc during a period, 0.9V), signal 1812 (corresponding to waveform 2786) is logic high during this same period, and signal 1835 (corresponding to waveform 2796) progressively reduces, so that dynamically for example, at predetermined level (, V th_oc) locate to obtain sensing voltage (for example, V cs) constant peak value.
Figure 28 is according to the simplification diagram of the switched-mode power supply transformation system with primary side sensing and adjustment of further embodiment of this invention.This diagram is only example, and it should not limit the scope of claim undeservedly.Those skilled in the art will recognize that many variants, substitutions and modifications.
Power converting system 2800 comprises armature winding 2810, secondary winding 2812, auxiliary winding 2814, resistor 2820,2822 and 2824, switch 2830, slope maker 2832, trsanscondutance amplifier 2834, Cycle by Cycle (cycle-by-cycle) peak value maker 2836, lead-edge-blanking assembly 2838, demagnetization detection components 2850, current source 2860, current sink 2862, switch 2864 and 2866, NOT (non-) door 2870, capacitor 2872 and 2858, comparator 2880 and 2882, trigger assembly 2890, and driven unit 2892.
For example, slope maker 2832, trsanscondutance amplifier 2834, Cycle by Cycle peak value maker 2836, lead-edge-blanking assembly 2838, demagnetization detection components 2850, current source 2860, current sink 2862, switch 2864 and 2866, NOT door 2870, capacitor 2872, comparator 2880 and 2882, trigger assembly 2890 and driven unit 2892 are positioned on chip 2840.In another example, chip 2840 at least comprises terminal 2842,2844,2846 and 2848.In another example, system 2800 is switching mode flyback power supply transformation systems.In another example, demagnetization detection components 2850 is identical with demagnetization detection components 2150 as shown in figure 22.
Figure 29 is according to the simplified timing diagram of the switched-mode power supply transformation system 2800 of the embodiment of the present invention.This diagram is only example, and it should not limit the scope of claim undeservedly.Those skilled in the art will recognize that many variants, substitutions and modifications.
As shown in figure 29, waveform 2910 represents input signal 2813 (for example, the V as the function of time in), waveform 2920 represents ramp signal 2833 (for example, the V as the function of time b), and waveform 2922 represents the signal 2881 (for example, CMP) as the function of time.In addition, waveform 2930 represents sensing signal 2847 (for example, the V as the function of time cs), and waveform 2940 represents peak signal 2837 (for example, the V as the function of time c2).
In addition, waveform 2950 represents feedback signal 2843 (for example, the V as the function of time fB), and waveform 2960 represents the Demag signal 2851 as the function of time, and waveform 2970 represents another ramp signal 2865 (for example, the V as the function of time a).In addition, waveform 2980 represents the control signal 2885 as the function of time, and waveform 2990 represents the driving signal 2893 as the function of time.
As shown in Figure 28 and Figure 29, in the time driving signal 2893 (corresponding to waveform 2990) to be logic high, switch 2830 conductings.According to an embodiment, the electric current 2811 of the armature winding 2810 of flowing through tilts to rise linearly, and signal 2847 (for example, V cs) also tilt to rise linearly by lead-edge-blanking assembly 2838.For example, signal 2847 (for example, V cs) received by Cycle by Cycle peak detector 2836, detector 2836 detects peak value and the output peak signal 2837 (corresponding to waveform 2940) of the signal 2847 in each switch periods, and peak signal 2837 represents the peak value of the signal 2847 detecting.In another example, peak signal 2837 (for example, V c2) received by trsanscondutance amplifier 2834, trsanscondutance amplifier 2834 also receives reference signal 2835 (for example V ref2).
According to an embodiment, peak signal 2837 (for example, V c2) and reference signal 2835 (for example V ref2) between voltage difference be exaggerated and be converted into current signal, this current signal and then be converted to voltage signal 2881 (for example, CMP) by capacitor 2858.According to another embodiment, voltage signal 2881 (corresponding to waveform 2922) is received by comparator 2880, and comparator 2880 also receives ramp signal 2833 (corresponding to waveform 2920).
For example, the size of voltage signal 2881 (for example, CMP) is along with the time is constant.In another example, comparator 2880 is compared voltage signal 2881 (corresponding to waveform 2922) with ramp signal 2833 (corresponding to waveform 2920), and exports comparison signal 2887 to trigger assembly 2890.In one embodiment, trigger assembly 2890 also receives control signal 2885 and the generation modulation signal 2891 from comparator 2882.In another embodiment, modulation signal 2891 is received by actuator assembly 2892, and as response, actuator assembly 2892 generates and drives signal 2893.
As shown in waveform 2920 and 2990, for example, if ramp signal 2833 (, V b) reach voltage signal 2881 (for example, CMP), drive signal 2893 to become logic low and switch 2830 ends from logic high.For example, in the time that switch 2830 ends, institute's stored energy is delivered to output and the demagnetization of power converting system 2800 and processes beginning.In another example, during demagnetization is processed, the electric current of the secondary winding 2812 of flowing through tilts to decline linearly.
As shown in figure 28, output voltage (for example, the V of auxiliary winding 2814 aux) reflection power converting system 2800 output voltage (for example, V o), and be converted to feedback signal 2843 (for example, V by resistor 2820 and 2822 fB).For example, feedback signal 2843 (for example, V fB) received by demagnetization detection components 2850, assembly 2850 for example, by feedback signal 2843 (, V fB) for example, compare with threshold signal (, 0.1V).
According to an embodiment, as shown in waveform 2950 and 2960, for example, as feedback signal 2843 (, V fB) rising to threshold signal (for example, 0.1V) when above, Demag signal 2851 becomes logic high, the beginning that its indication demagnetization is processed.According to another embodiment, for example, as feedback signal 2843 (, V fB) dropping to threshold signal (for example, 0.1V) when following, Demag signal 2851 becomes logic low, the end that its indication demagnetization is processed.For example, when the electric current of the secondary winding 2812 of flowing through drops to when almost nil, demagnetization processing finishes.In another example, after demagnetization processing finishes, power converting system 2800 enters resonance oscillations state, and feedback signal 2843 (for example, V fB) (corresponding to waveform 2310) be approximately sinusoidal wave.
As shown in figure 28, Demag signal 2851 is received by switch 2866 and NOT door 2870, and NOT door 2870 is exported to switch 2864 as response by signal 2871.For example, if Demag signal 2851 is logic high, switch 2864 disconnects and switch 2866 closures.Therefore, according to an embodiment, capacitor 2872 is discharged by current sink 2862, and ramp signal 2865 (for example, V a) decline linearly.In another example, if Demag signal 2851 is logic low, switch 2864 closures and switch 2866 disconnect.Therefore, according to another embodiment, capacitor 2872 is charged by current source 2860, and ramp signal 2865 (for example, V a) rise linearly.
According to another embodiment, ramp signal 2865 (for example, V a) received by comparator 2882, comparator 2882 is gone back receive threshold signal 2883 (for example, V ref1).For example, comparator 2882 for example, by ramp signal 2865 (, V a) and threshold signal 2883 (for example, V ref1) compare, and export control signal 2885 to trigger assembly 2890.As shown in waveform 2970 and 2990, for example, if ramp signal 2865 (, V a) reach in size threshold signal 2883 (for example, V ref1), drive signal 2893 to become logic high from logic low, and switch 2830 conductings.
Figure 30 is as according to the simplification diagram of the Cycle by Cycle peak value maker 2836 of power converting system 2800 parts for the embodiment of the present invention.This diagram is only example, and it should not limit the scope of claim undeservedly.Those skilled in the art will recognize that many variants, substitutions and modifications.
In one embodiment, Cycle by Cycle peak value maker 2836 comprises comparator 3010, switch 3020,3022 and 3024, buffer 3030, capacitor 3040 and 3042, current source 3050, and monostable maker 3060.In another embodiment, switch 3022 and 3024 is controlled by signal 3062 and 3064 respectively, and signal 3062 and 3064 is that monostable maker 3060 is in response to driving signal 2893 to generate.For example, signal 3062 and 3064 respectively has the monostable signal of 300ns pulsewidth naturally.
Figure 31 is as according to the simplified timing diagram of the Cycle by Cycle peak value maker 2836 of power converting system 2800 parts for the embodiment of the present invention.This diagram is only example, and it should not limit the scope of claim undeservedly.Those skilled in the art will recognize that many variants, substitutions and modifications.
As shown in figure 31, waveform 3110 represents the driving signal 2893 as the function of time, and waveform 3120 represents sensing signal 2847 (for example, the V as the function of time cs).In addition, waveform 3130 represents the monostable signal 3062 as the function of time, and waveform 3140 represents the monostable signal 3064 as the function of time.In addition, waveform 3150 represents signal 3023 (for example, the V as the function of time c1), and waveform 3160 represents the signal 3031 as the function of time.In addition, waveform 3180 represents peak signal 2837 (for example, the V as the function of time c2).
As shown in Figure 30 and 31, monostable maker 3060 receives and drives signal 2893 (corresponding to waveform 3110), and generates monostable signal 3062 (corresponding to waveforms 3130) in response to the rising edge that drives signal 2893.For example, monostable signal 3062 has the pulsewidth of 300ns.In another example, in the time that monostable signal 3062 is logic high, switch 3022 is closed; Therefore, capacitor 3040 is discharged and signal 3023 (corresponding to waveform 3150) drops to logic low.
In another example, signal 3023 (corresponding to waveform 3150) is received by comparator 3010, and comparator 3010 is compared signal 3023 with signal 2847 (corresponding to waveform 3120).According to an embodiment, if signal 2847 is greater than signal 3023 in size, switch 3020 closures and capacitor 3022 are charged by current source 3050.According to another embodiment, if signal 3023 reaches signal 2847 in size, switch 3020 disconnects; Therefore, signal 3023 represents the peak value of signal 2874 in the corresponding signal period, until switch 3022 next pulse by monostable signal 3022 is by closure again.According to another embodiment, signal 3023 is received by buffer 3030, and buffer 3030 generates signal 3031 (corresponding to waveform 3160).
According to another embodiment, monostable maker 3060 receives and drives signal 2893 (corresponding to waveform 3110), and generates monostable signal 3064 (corresponding to waveforms 3140) in response to the trailing edge that drives signal 2893.For example, monostable signal 3064 has the pulsewidth of 300ns.In another example, in the time that monostable signal 3064 is logic high, switch 3024 is closed; Therefore, capacitor 3042 is charged and signal 2837 (corresponding to waveform 3170) is used to signal 3031 to sample.In another example, be maintained on capacitor 3042 and as signal 2837 and be output through the signal 3031 of sampling, signal 2837 represents the peak value of the signal 2874 in the corresponding signal cycle until drive next pulse of signal 2844 to arrive.
With reference to Figure 28, for example, the switch periods of power converting system 2800 is as follows:
T s = I 2 + I 1 I 1 × T Demag - - - ( 35 )
Wherein, T srepresent switch periods, and T demagrepresent the duration that demagnetization is processed.I 2represent the size of the charging current of current source 2860, and I 1represent the size of the discharging current of current sink 2862.
According to an embodiment, AC input signal 2815 is converted into input signal 2813 (for example, the V through rectification in), as follows:
V in = | 2 × V rms × sin ( 2 π T AC × t ) | - - - ( 36 )
Wherein, V inrepresent the input signal 2813 through rectification.In addition, V rmsrepresent the root mean square size of AC input signal 2815, and T aCrepresent the cycle of AC input signal 2815.For example, T aCequal 20ms.
In another example, therefore, peak signal 2837 is
V c 2 = | 2 × V rms × sin ( 2 π T AC × t ) | L p × t on × R s - - - ( 37 )
Wherein, V c2represent peak signal 2837.In addition, t onrepresent to drive the pulsewidth of signal 2893, and R srepresent the resistance value of resistor 2824.In addition L, prepresent the inductance of armature winding 2810.
In another example, as shown in figure 28, peak signal 2837 quilts are average and make the mean value of peak signal 2837 equal reference signal 2835.According to an embodiment, if
g m 2 &pi; &times; C cmp < 1 K &times; T AC - - - ( 38 )
, V ref 2 = V cs _ ave = 1 T &times; &Integral; 0 T V c 2 dt = 1 T &times; &Integral; 0 T V cs _ pk dt - - - ( 39 )
Wherein, g mthe transconductance value of trsanscondutance amplifier 2834, and C cmpit is the capacitance of capacitor 2858.In addition, T represents integration period, and K is the positive integer much larger than 1.For example, T is equal to or greater than T aC.In another example, K is not less than 3.In another example, K equals 3,5, and 6,10 or 20.In another example, the bandwidth of trsanscondutance amplifier 2834 is much smaller than the frequency of AC input signal 2815.In addition V, cs_averepresent the mean value of peak signal 2837, and V ref2represent reference signal 2835.In addition V, cs_pkthe peak value that represents signal 2847, it for example equals V c2.
According to another embodiment, as shown in figure 28,
I o = 1 2 &times; N &times; 1 T &times; &Integral; 0 T V cs _ pk R s &times; T Demag T s dt - - - ( 40 )
Wherein, I 0represent the output current of switched-mode power supply transformation system 2800, and N represents the turn ratio between armature winding 2810 and secondary winding 2812.In addition, R srepresent the resistance value of resistor 2824, and T srepresent the switch periods of power converting system 2800.In addition T, demagrepresent the duration of the demagnetization processing in each switch periods.
According to another embodiment, by equation 35 and 39 and equation 40 combine, can obtain following formula:
I 0 = 1 2 &times; N &times; 1 R s &times; I 1 I 2 + I 1 &times; V ref 2 - - - ( 41 )
For example,, based on equation 41, due to I 1, I 2, V ref2, R swith N be all constant, therefore output current I oconstant.In another example, power converting system 2800 makes
Figure BSA00000443883900645
with
Figure BSA00000443883900646
keep constant, to make output current I okeep constant.In one embodiment, make by least meeting equation 38 keep constant.In another embodiment, make by least meeting equation 35 keep constant.
As discussed above and emphasize at this, Figure 28 is only example, and it should not limit the scope of claim undeservedly.Those skilled in the art will recognize that many variants, substitutions and modifications.For example, power converting system 2800 comprises the one or more large value capacitors for AC input signal 2815 being converted to the DC signal being received by armature winding 2810, shown in figure 32.
Figure 32 is according to the simplification diagram of the switched-mode power supply transformation system with primary side sensing and adjustment of further embodiment of this invention.This diagram is only example, and it should not limit the scope of claim undeservedly.Those skilled in the art will recognize that many variants, substitutions and modifications.
For example, except power converting system 3200 also comprises capacitor 3210 and 3220, resistor 3230 and inductor 3240, power converting system 3200 is identical with power converting system 2800.In another example, capacitor 3210 and 3220, resistor 3230 and inductor 3240 are used for AC input signal 3215 to be converted to DC input signal 3213 (for example, V in).
According to an embodiment, the advantage of power converting system 2800 is without using one or more large value capacitors and AC input signal being converted to the DC input signal being received by armature winding 2810.According to another embodiment, however, power converting system 2800 can utilize one or more such large value capacitors to operate, shown in figure 32.
Figure 33 is according to the simplification diagram of the switched-mode power supply transformation system with primary side sensing and adjustment of further embodiment of this invention.This diagram is only example, and it should not limit the scope of claim undeservedly.Those skilled in the art will recognize that many variants, substitutions and modifications.
Power converting system 3300 comprises armature winding 3310, secondary winding 3312, auxiliary winding 3314, resistor 3320,3322 and 3324, switch 3330, trsanscondutance amplifier 3334, Cycle by Cycle peak value maker 3336, lead-edge-blanking assembly 3338, demagnetization detection components 3350, oscillator 3360, AND door 3366, capacitor 3358, integrator 3370, comparator 3382, trigger assembly 3390 and driven unit 3392.
For example, trsanscondutance amplifier 3334, Cycle by Cycle peak value maker 3336, lead-edge-blanking assembly 3338, demagnetization detection components 3350, oscillator 3360, AND door 3366, integrator 3370, comparator 3382, trigger assembly 3390 and driven unit 3392 are positioned on chip 3340.In another example, chip 3340 at least comprises terminal 3342,3344,3346 and 3348.In another example, system 3300 is switching mode flyback power supply transformation systems.In another example, demagnetization detection components 3350 is identical with demagnetization detection components 2150 as shown in figure 22.In another example, Cycle by Cycle peak value maker 3336 is identical with Cycle by Cycle peak value maker 2836 as shown in figure 30.In another example, integrator 3370 is Cycle by Cycle integrators that (for example, when, the demagnetization processing in each switch periods finishes) is reset after each switch periods.
Figure 34 is as according to the simplification diagram of the integrator 3370 of power converting system 3300 parts for the embodiment of the present invention.This diagram is only example, and it should not limit the scope of claim undeservedly.Those skilled in the art will recognize that many variants, substitutions and modifications.
In one embodiment, integrator 3370 comprises switch 3420,3422 and 3424, capacitor 3440 and 3442, transistor 3450,3452 and 3454, amplifier 3460, monostable maker 3460 and 3462, and resistor 3470.In another embodiment, switch 3320 is controlled by Demag signal 3351.In another embodiment, switch 3422 and 3424 is controlled by signal 3461 and 3463 respectively.For example, signal 3461 is generated in response to driving signal 3393 by monostable maker 3460.In another example, signal 3463 is generated in response to Demag signal 3351 by monostable maker 3462.
Figure 35 is according to the simplified timing diagram of the switched-mode power supply transformation system 3300 that comprises the integrator 3370 as shown in Figure 33 and 34 of the embodiment of the present invention.This diagram is only example, and it should not limit the scope of claim undeservedly.Those skilled in the art will recognize that many variants, substitutions and modifications.
As shown in figure 35, waveform 3510 represents the driving signal 3393 as the function of time, and waveform 3520 represents sensing signal 3347 (for example, the V as the function of time cs), and waveform 3530 represents peak signal 3337 (for example, the V as the function of time c2).In addition, waveform 3540 represents the monostable signal 3461 as the function of time, and waveform 3550 represents the monostable signal 3463 as the function of time.In addition, waveform 3560 represents the Demag signal 3351 as the function of time.In addition, waveform 3570 represents the signal 3423 as the function of time, and waveform 3580 represents the signal 3372 as the function of time.
As shown in FIG. 34 and 35, monostable maker 3460 receives and drives signal 3393 (corresponding to waveform 3510) and generate signal 3461 (corresponding to waveform 3540) in response to the rising edge that drives signal 3393.For example, signal 3461 is monostable signals.In another example, in the time that monostable signal 3461 is logic high, switch 3422 is closed; Therefore, capacitor 3440 is discharged and signal 3423 (corresponding to waveform 3570) drops to logic low.
According to an embodiment, in the time that Demag signal 3351 (corresponding to waveform 3560) is logic high, switch 3420 closures.According to another embodiment, peak signal 3337 (corresponding to waveform 3530) is received by amplifier 3460, the peak signal 3337 as voltage signal is converted to current signal by amplifier 3460, in the time that switch 3420 is closed by Demag signal 3351, this current signal is used for capacitor 3440 to charge.For example, capacitor 3440 output signals 3423 (corresponding to waveform 3570).In another example, signal 3423 is received by buffer 3030, and buffer 3030 generates signal 3431.
According to another embodiment, monostable maker 3462 receives Demag signal 3351 (corresponding to waveform 3560), and generates signal 3463 (corresponding to waveform 3550) in response to the trailing edge of Demag signal 3351.For example, signal 3463 is monostable signals.In another example, in the time that monostable signal 3463 is logic high, switch 3424 is closed; Therefore, capacitor 3442 is charged and signal 3372 (corresponding to waveform 3580) is used to signal 3431 to sample.In another example, be maintained on capacitor 3442 and as signal 3372 and be output until drive next pulse of signal 3344 to arrive through sampled signal 3431.
According to another embodiment, signal 3372 is
V c 4 = &Integral; 0 T Demag V c 2 R 3 &times; 1 C 3 dt = V c 2 &times; T Demag R 3 &times; C 3 - - - ( 42 )
Wherein, V c4represent signal 3372, and V c2represent peak signal 3337.In addition, T demagrepresent the duration of the demagnetization processing in each switch periods.In addition R, 3represent the resistance value of resistor 3470, and C 3represent the capacitance of capacitor 3440.
Figure 36 is as according to the simplification diagram of the oscillator 3360 of power converting system 3300 parts for the embodiment of the present invention.This diagram is only example, and it should not limit the scope of claim undeservedly.Those skilled in the art will recognize that many variants, substitutions and modifications.
In one embodiment, oscillator 3360 at least comprises resistor 3640 and capacitor 3650.In another embodiment, oscillator 3360 receives reference signal 3610,3620 and 3630, and generated clock signal 3362 and ramp signal 3364.In another embodiment, the cycle of clock signal 3362 and ramp signal 3364 is determined by following formula:
T osc = 2 &times; R 5 &times; C 5 &times; V ref 2 - V ref 3 V ref 1 - - - ( 43 )
Wherein, T oscrepresent the cycle of clock signal 3362 and ramp signal 3364.In addition, V ref1, V ref2and V ref3represent respectively reference signal 3610,3620 and 3630.In addition R, 5represent the resistance value of resistor 3640, and C 5represent the capacitance of capacitor 3650.
In another embodiment, the switch periods of power converting system 3300 equals the cycle of clock signal 3362 and ramp signal 3364, and switching frequency is confirmed as follows:
F sw = V ref 1 2 &times; R 5 &times; C 5 &times; ( V ref 2 - V ref 3 ) - - - ( 44 )
Wherein, F swrepresent the switching frequency of power converting system 3300.For example, the switching frequency operation of power converting system 3300 to fix.
Figure 37 is according to the simplified timing diagram of the switched-mode power supply transformation system 3300 of the embodiment of the present invention.This diagram is only example, and it should not limit the scope of claim undeservedly.Those skilled in the art will recognize that many variants, substitutions and modifications.
As shown in figure 37, waveform 3710 represents input signal 3313 (for example, the V as the function of time in), and waveform 3720 represents the driving signal 3393 as the function of time.In addition, waveform 3730 represents the clock signal 3362 as the function of time, and waveform 3740 represents the ramp signal 3364 as the function of time, and waveform 3742 represents the signal 3381 (for example, CMP) as the function of time.In addition, waveform 3750 represents sensing signal 3347 (for example, the V as the function of time cs), and waveform 3760 represents peak signal 3337 (for example, the V as the function of time c2).In addition, waveform 3770 represents the Demag signal 3351 as the function of time, and waveform 3780 represents the signal 3372 as the function of time.
As shown in Figure 33 and 37, at the rising edge place of signal 3362 (corresponding to waveform 3730), drive signal 3393 (corresponding to waveform 3720) to become logic high and switch 3330 conductings.According to an embodiment, the electric current 3311 of the armature winding 3310 of flowing through tilts to rise linearly, and signal 3347 (for example, V cs) also tilt to rise linearly by lead-edge-blanking assembly 3338.For example, signal 3347 (for example, V cs) received by Cycle by Cycle peak detector 3336, detector 3336 detects peak value and the output peak signal 3337 (corresponding to waveform 3760) of the signal 3347 in each switch periods, and peak signal 3337 represents the peak value of the signal 3347 detecting.In another example, peak signal 3337 (for example, V c2) received by integrator 3370, integrator 3370 also receives and drives signal 3393 (corresponding to waveform 3720) and Demag signal 3351 (corresponding to waveform 3770), and to trsanscondutance amplifier 3334 output signals 3372 (corresponding to waveform 3780).
According to an embodiment, trsanscondutance amplifier 3334 also receives reference signal 3335 (for example V ref), and as response, for example, by signal 3372 (, V c4) and reference signal 3335 (for example V ref) between voltage difference amplify and be converted to current signal, this current signal and then be converted to voltage signal 3381 (for example, CMP) by capacitor 3358.According to another embodiment, voltage signal 3381 (corresponding to waveform 3742) is received by comparator 3382, and comparator 3382 also receives ramp signal 3364 (corresponding to waveform 3740).
For example, the size of voltage signal 3381 (for example, CMP) is along with the time is constant.In another example, comparator 3382 is compared voltage signal 3381 (corresponding to waveform 3742) with ramp signal 3364 (corresponding to waveform 3740), and exports comparison signal 3385 to trigger assembly 3390.In one embodiment, trigger assembly 3390 also at least receives the clock signal 3362 from oscillator 3360, and generates signal 3391.In another embodiment, signal 3391 is received by AND door 3366, and AND door 3366 is gone back receive clock signal 3362 and generated modulation signal 3368.In another embodiment, actuator assembly 3392 receives modulation signal 3368, and generates driving signal 3393.
As shown in waveform 3720,3740 and 3742, for example, if ramp signal 3364 reaches voltage signal 3381 (, CMP), drive signal 3393 to become logic low and switch 3330 ends from logic high.For example, in the time that switch 3330 ends, institute's stored energy is delivered to output and the demagnetization of power converting system 3300 and processes beginning.In another example, during demagnetization is processed, the electric current of the secondary winding 3312 of flowing through tilts to decline linearly.
As shown in figure 33, output voltage (for example, the V of auxiliary winding 3314 aux) reflection power converting system 3300 output voltage (for example, V o), and be converted to feedback signal 3343 (for example, V by resistor 3320 and 3322 fB).For example, feedback signal 3343 (for example, V fB) received by demagnetization detection components 3350, assembly 3350 for example, by feedback signal 3343 (, V fB) for example, compare with threshold signal (, 0.1V).
According to an embodiment, for example, as feedback signal 3343 (, V fB) rising to threshold signal (for example, 0.1V) when above, Demag signal 3351 becomes logic high, the beginning that its indication demagnetization is processed, as shown in waveform 3770.According to another embodiment, for example, as feedback signal 3343 (, V fB) dropping to threshold signal (for example, 0.1V) when following, Demag signal 3351 becomes logic low, the end that its indication demagnetization is processed.For example, when the electric current of the secondary winding 3312 of flowing through drops to when almost nil, demagnetization processing finishes.In another example, after demagnetization processing finishes, power converting system 3300 enters resonance oscillations state, and feedback signal 3343 (for example, V fB) be approximately sinusoidal wave.According to another embodiment, as shown in waveform 3720 and 3730, at next rising edge place of clock signal 3362, drive signal 3393 again to become logic high and switch 3330 conducting again.
In one embodiment, AC input signal 3315 is converted into input signal 3313 (for example, the V through rectification in), as follows:
V in = | 2 &times; V rms &times; sin ( 2 &pi; T AC &times; t ) | - - - ( 45 )
Wherein, V inrepresent the input signal 3313 through rectification.In addition, V rmsrepresent the root mean square size of AC input signal 3315, and T aCrepresent the cycle of AC input signal 3315.For example, T aCequal 20ms.
In another example, peak signal 3337 is
V c 2 = V in L p &times; t on &times; R s - - - ( 46 )
Wherein, V c2represent peak signal 3337.In addition, t onrepresent to drive the pulsewidth of signal 3393, and R srepresent the resistance value of resistor 3324.In addition L, prepresent the inductance of armature winding 3310.
In another example, based on equation 42, signal 3372 equals
V c 4 = V c 2 &times; T Demag R 3 &times; C 3 = V cs _ pk &times; T Demag R 3 &times; C 3 - - - ( 47 )
Wherein, V c4represent signal 3372, and T demagrepresent the duration of the demagnetization processing in each switch periods.In addition, R 3represent the resistance value of resistor 3470, and C 3represent the capacitance of capacitor 3440.In addition V, cs_pkthe peak value that represents signal 3347, it for example equals V c2.
In another example, as shown in figure 33, signal 3372 quilts are average and make the mean value of signal 3372 equal reference signal 3335.According to an embodiment, if
g m 2 &pi; &times; C cmp < 1 K &times; T AC - - - ( 48 )
, V ref = V c 4 _ ave = 1 T &times; &Integral; 0 T V c 4 dt - - - ( 49 )
Wherein, g mthe transconductance value of trsanscondutance amplifier 3334, and C cmpit is the capacitance of capacitor 3358.In addition, T represents integration period, and K is the positive integer much larger than 1.For example, T is equal to or greater than T aC.In another example, K is not less than 3.In another example, K equals 3,5,6,10 or 20.In another example, the bandwidth of trsanscondutance amplifier 3334 is much smaller than the frequency of AC input signal 3315.In addition V, c4_averepresent the mean value of signal 3372, and V refrepresent reference signal 3335.
According to another embodiment, combination equation 47 and 49, can obtain following formula:
1 T &times; &Integral; 0 T V cs pk &times; T Demag dt = R 3 &times; C 3 &times; V ref - - - ( 50 )
According to another embodiment, based on equation 44, power converting system 3300 is with fixed switching frequency operation,
I o = 1 2 &times; N &times; 1 T &times; &Integral; 0 T V cs _ pk R s &times; T Demag T s dt = N 2 &times; R s &times; T s &times; 1 T &times; &Integral; 0 T V cs _ pk &times; T Demag dt - - - ( 51 )
Wherein, I 0represent the output current of switched-mode power supply transformation system 3300, and N represents the turn ratio between armature winding 3310 and secondary winding 3312.In addition, R sthe resistance value that represents resistor 3324, it is constant.In addition T, sthe switch periods that represents power converting system 3300, it is to equal 1/F swconstant.
According to another embodiment, by equation 44 and 50 and equation 51 combine, can obtain following formula:
I 0 = 1 2 &times; N &times; 1 R s &times; 1 2 &times; R 5 &times; C 5 &times; V ref 1 V ref 2 - V ref 3 &times; R 3 &times; C 3 &times; V ref - - - ( 52 )
If K 0 = R 3 &times; C 3 2 &times; R 5 &times; C 5 &times; V ref 1 V ref 2 - V ref 3 - - - ( 53 )
I 0 = 1 2 &times; N &times; 1 R s &times; K 0 &times; V ref - - - ( 54 )
For example,, based on equation 54, due to K 0, V ref, R swith N be all constant, therefore output current I oconstant.In another example, power converting system 3300 intentions make
Figure BSA00000443883900716
and T skeep constant, to make output current I okeep constant.In one embodiment, make by least meeting equation 48
Figure BSA00000443883900717
keep constant.In another embodiment, make T by least meeting equation 44 skeep constant.
As shown in figure 33, in one embodiment, for example, through rectification input voltage 3313 (, V in) determined by following formula
V in = | 2 &times; V rms &times; sin ( 2 &pi; T AC &times; t ) | - - - ( 55 )
In another embodiment, the flow through peak value of electric current 3311 of armature winding 3310 is determined by following formula
I p = V in L p &times; t on - - - ( 56 )
Wherein, I prepresent the peak value of electric current 3311, and L prepresent the inductance of armature winding 3310.In addition, t onrepresent to drive the pulsewidth of signal 3393.
Figure 38 is according to the simplified timing diagram of some electric current of the switched-mode power supply transformation system 3300 of the embodiment of the present invention.This diagram is only example, and it should not limit the scope of claim undeservedly.Those skilled in the art will recognize that many variants, substitutions and modifications.
For example, waveform 3810 represents the electric current 3311 as the function of time, and waveform 3820 represent as the function of time for example, through rectification input current 3317 (, I in).In another example, for example, through rectification input current 3317 (, I in) corresponding to as shown in figure 33 for example, through rectification input voltage 3313 (, V in).
As shown in figure 38, in one embodiment, for example, through rectification input current 3317 (, I in) be
I in = ( 1 2 &times; I p &times; t on ) / T s - - - ( 57 )
Wherein, I inrepresent through rectification input current 3317.In another embodiment, combination equation 56 and equation 57, can obtain:
I in = V in &times; t on 2 2 &times; L p &times; T s - - - ( 58 )
In another embodiment,
t on = 1 2 &times; V cmp - V ref 3 V ref 2 - V ref 3 - - - ( 59 )
Wherein, V cmprepresent signal 3381.In addition, V ref2and V ref3it is the constant that represents respectively reference signal 3620 and 3630.For example,, based on equation 59, if meet equation 48, t onwithin at least one cycle of AC input signal 3315, be constant, and therefore, V cmpwithin at least one cycle of AC input signal 3315, be constant.
If M = t on 2 2 &times; L p &times; T s - - - ( 60 )
, according to equation 58,
I in＝M×V in
(61)
According to an embodiment, as shown in figure 38, based on equation 44, the switch periods T of power converting system 3300 sconstant; Therefore, M is also positive integer within least one cycle of AC input signal 3315, and the power factor of power converting system 3300 (PF) equals 1 or be substantially equal to 1.For example, the power factor of power converting system 3300 (PF) is equal to or greater than 0.9.According to another embodiment, by least meeting equation 44 and 48, the power factor (PF) of power converting system 3300 is close to 1.
As discussed above and emphasize at this, Figure 33 is only example, and it should not limit the scope of claim undeservedly.Those skilled in the art will recognize that many variants, substitutions and modifications.For example, power converting system 3300 comprises the one or more large value capacitors for AC input signal 3315 being converted to the DC signal being received by armature winding 3310, as shown in figure 39.
Figure 39 is according to the simplification diagram of the switched-mode power supply transformation system with primary side sensing and adjustment of further embodiment of this invention.This diagram is only example, and it should not limit the scope of claim undeservedly.Those skilled in the art will recognize that many variants, substitutions and modifications.
For example, except power converting system 3900 also comprises capacitor 3910 and 3920, resistor 3930 and inductor 3940, power converting system 3900 is identical with power converting system 3300.In another example, capacitor 3910 and 3920, resistor 3930 and inductor 3940 are used for AC input signal 3915 to be converted to DC input signal 3913 (for example, V in).
With reference to Figure 33 and 39, according to an embodiment, power converting system 3900 can equal 1 or obtain constant output current be substantially equal to 1 in the situation that in power factor.For example, the power factor of power converting system 3900 (PF) is equal to or greater than 0.9.According to another embodiment, power converting system 3300 is used to provide power to one or more light-emitting diodes, as shown in figure 40.
Figure 40 is the simplification diagram for the switched-mode power supply transformation system 3300 to light-emitting diode power supply according to further embodiment of this invention.This diagram is only example, and it should not limit the scope of claim undeservedly.Those skilled in the art will recognize that many variants, substitutions and modifications.For example, power converting system 3300 is used to provide power to one or more light-emitting diodes 4010.
Figure 41 is according to the simplification diagram of the switched-mode power supply transformation system with primary side sensing and adjustment of further embodiment of this invention.This diagram is only example, and it should not limit the scope of claim undeservedly.Those skilled in the art will recognize that many variants, substitutions and modifications.
Power converting system 4100 comprises armature winding 4110, secondary winding 4112, auxiliary winding 4114, resistor 4120,4122,4124,4126 and 4128, switch 4130, trsanscondutance amplifier 4134, Cycle by Cycle peak value maker 4136, lead-edge-blanking assembly 4138, demagnetization detection components 4150, oscillator 4160, AND door 4166, capacitor 4158, integrator 4170, comparator 4182, multiplier 4184, trigger assembly 4190 and driven unit 4192.
For example, trsanscondutance amplifier 4134, Cycle by Cycle peak value maker 4136, lead-edge-blanking assembly 4138, demagnetization detection components 4150, oscillator 4160, AND door 4166, integrator 4170, comparator 4182, multiplier 4184, trigger assembly 4190 and driven unit 4192 are positioned on chip 4140.In another example, chip 4140 at least comprises terminal 4142,4144,4146,4148 and 4149.In another example, system 4100 is switching mode flyback power supply transformation systems.
In another example, demagnetization detection components 4150 is identical with demagnetization detection components 2150 as shown in figure 22.In another example, Cycle by Cycle peak value maker 4136 is identical with Cycle by Cycle peak value maker 2836 as shown in figure 30.In another example, integrator 4170 is identical with integrator 3370 as shown in figure 34.In another example, oscillator 4160 is identical with oscillator 3360 as shown in figure 36.In another example, integrator 4170 is Cycle by Cycle integrators that (for example, when, the demagnetization processing in each switch periods finishes) is reset after each switch periods.
Figure 42 is according to the simplified timing diagram of the switched-mode power supply transformation system 4100 of the embodiment of the present invention.This diagram is only example, and it should not limit the scope of claim undeservedly.Those skilled in the art will recognize that many variants, substitutions and modifications.
As shown in figure 42, waveform 4210 represents input signal 4113 (for example, the V as the function of time in), and waveform 4220 represents the driving signal 4193 as the function of time, and waveform 4230 represents the clock signal 4162 as the function of time.In addition, waveform 4240 represents 4183 (for example, MULT) as the function of time, and waveform 4242 represents the signal 4181 (for example, CMP) as the function of time.In addition, waveform 4250 represents sensing signal 4147 (for example, the V as the function of time cs), and waveform 4260 represents peak signal 4137 (for example, the V as the function of time c2), and waveform 4262 represents the signal 4185 as the function of time.In addition, waveform 4270 represents the Demag signal 4151 as the function of time, and waveform 4280 represents the signal 4172 as the function of time.
As shown in Figure 41 and 42, at the rising edge place of signal 4162 (corresponding to waveform 4230), drive signal 4193 (corresponding to waveform 4220) to become logic high and switch 4130 conductings.According to an embodiment, the electric current 4111 of the armature winding 4110 of flowing through tilts to rise linearly, and signal 4147 (for example, V cs) also tilt to rise linearly by lead-edge-blanking assembly 4138.For example, signal 4147 (for example, V cs) received by Cycle by Cycle peak detector 4136, detector 4136 detects peak value and the output peak signal 4137 (corresponding to waveform 4260) of the signal 4147 in each switch periods, and peak signal 4137 represents the peak value of the signal 4147 detecting.In another example, peak signal 4137 (for example, V c2) received by integrator 4170, integrator 4170 also receives and drives signal 4193 (corresponding to waveform 4220) and Demag signal 4151 (corresponding to waveform 4270), and to trsanscondutance amplifier 4134 output signals 4172 (corresponding to waveform 4280).
According to an embodiment, trsanscondutance amplifier 4134 also receives reference signal 4135 (for example V ref), and as response, for example, by signal 4172 (, V c4) and reference signal 4135 (for example V ref) between voltage difference amplify and be converted to current signal, this current signal and then be converted to voltage signal 4181 (for example, CMP) by capacitor 4158.For example, voltage signal 4181 (for example, CMP) is in size along with the time is constant.In another example, voltage signal 4181 (corresponding to waveform 4242) is received by multiplier 4184, and multiplier 4184 also receives signal 4183 (corresponding to waveform 4240).In another example, signal 4183 by resistor 4126 and 4128 and with input signal 4113 (for example, V in) proportional.
According to another embodiment, multiplier 4184 is as response to comparator 4182 output signals 4185 (corresponding to waveform 4262), and comparator 4182 also receives sensing signal 4147 (corresponding to waveform 4250).For example, comparator 4182 is compared signal 4185 (corresponding to waveform 4262) with sensing signal 4147 (corresponding to waveform 4250), and exports comparison signal 4187 to trigger assembly 4190.In one embodiment, trigger assembly 4190 also at least receives the clock signal 4162 from oscillator 4160, and generates signal 4191.In another embodiment, signal 4191 is received by AND door 4166, and AND door 4166 is gone back receive clock signal 4162 and generated modulation signal 4168.In another embodiment, actuator assembly 4192 receives modulation signal 4168, and generates driving signal 4193.
As shown in waveform 4220,4250 and 4262, if signal 4147 reaches signal 4185, drive signal 4193 to become logic low and switch 4130 ends from logic high.For example, in the time that switch 4130 ends, institute's stored energy is delivered to output and the demagnetization of power converting system 4100 and processes beginning.In another example, during demagnetization is processed, the electric current of the secondary winding 4112 of flowing through tilts to decline linearly.
As shown in figure 41, output voltage (for example, the V of auxiliary winding 4114 aux) reflection power converting system 4100 output voltage (for example, V o), and be converted to feedback signal 4143 (for example, V by resistor 4120 and 4122 fB).For example, feedback signal 4143 (for example, V fB) received by demagnetization detection components 4150, assembly 4150 for example, by feedback signal 4143 (, V fB) for example, compare with threshold signal (, 0.1V).
According to an embodiment, for example, as feedback signal 4143 (, V fB) rising to threshold signal (for example, 0.1V) when above, Demag signal 4151 becomes logic high, the beginning that its indication demagnetization is processed, as shown in waveform 4270.According to another embodiment, for example, as feedback signal 4143 (, V fB) dropping to threshold signal (for example, 0.1V) when following, Demag signal 4151 becomes logic low, the end that its indication demagnetization is processed.For example, when the electric current of the secondary winding 4112 of flowing through drops to when almost nil, demagnetization processing finishes.In another example, after demagnetization processing finishes, power converting system 4100 enters resonance oscillations state, and feedback signal 4143 (for example, V fB) be approximately sinusoidal wave.According to another embodiment, as shown in waveform 4220 and 4230, at next rising edge place of clock signal 4162, drive signal 4193 again to become logic high and switch 4130 conducting again.
In one embodiment, as shown in figure 41, output current is
I 0 = 1 2 &times; N &times; 1 R s &times; K 0 &times; V ref - - - ( 62 )
Wherein, I 0represent the output current of switched-mode power supply transformation system 4100.In addition, N is the constant that represents the turn ratio between armature winding 4110 and secondary winding 4112.In addition R, srepresent the resistance value of resistor 4124, and V refrepresent reference signal 4135, R sand V refall constant.In addition K, 0it is constant.
For example, in order to obtain equation 62, power converting system 4100 operates with fixed switching frequency, and
g m 2 &pi; &times; C cmp < 1 K &times; T AC - - - ( 63 )
Wherein, g mthe transconductance value of trsanscondutance amplifier 4134, and C cmpit is the capacitance of capacitor 4158.In addition, T aCrepresent the cycle of AC input signal 4115, and K is the positive integer much larger than 1.For example, K is not less than 3.In another example, K equals 3,5,6,10 or 20.In another example, the bandwidth of trsanscondutance amplifier 4134 is much smaller than the frequency of AC input signal 4115.
In another example, based on equation 62, due to K 0, V ref, R swith N be all constant, therefore output current I oconstant.In another example, power converting system 4100 intentions make
Figure BSA00000443883900771
and T skeep constant, to make output current I okeep constant.I represents integration period.For example, T is equal to or greater than T aC.In one embodiment, make by least meeting equation 63
Figure BSA00000443883900772
keep constant.In another embodiment, make T by oscillator 3360 skeep constant.
As shown in figure 41, in one embodiment, signal 4185 is confirmed as follows:
V cs _ pk = V mp = a &times; V cmp &times; V mult = a &times; V cmp &times; ( R 4 R 3 + R 4 &times; V in ) - - - ( 64 )
Wherein, V cs_pkrepresent the peak value of sensing signal 4147, and V mprepresent signal 4185.In addition, α is the constant coefficients of multiplier 4184.In addition V, cmprepresent signal 4181, and V multrepresent signal 4183.In addition R, 3and R 4represent respectively the resistance value of resistor 4126 and 4128, and V inrepresent through rectification input voltage 4113.
In another example, the peak value of sensing signal 4147 is
V cs _ pk = V in L p &times; t on &times; R s - - - ( 65 )
Wherein, t onrepresent to drive the pulsewidth of signal 4193, and R srepresent the resistance value of resistor 4124.In addition, L prepresent the inductance of armature winding 4110.
Combination equation 64 and 65, can obtain following formula:
t on = a &times; V cmp &times; R 4 R 3 + R 4 &times; L p R s - - - ( 66 )
For example,, based on equation 66, if meet equation 63, t onwithin at least one cycle of AC input signal 4115, be constant, and therefore, V cmpwithin at least one cycle of AC input signal 4115, be constant.
In another example, as shown in figure 41, and for example, through rectification input voltage 4113 (, V in) corresponding for example, through rectification input current 4117 (, I in) be
I in = V in &times; t on 2 2 &times; L p &times; T s - - - ( 67 )
Wherein, I inrepresent through rectification input current 4117, and T srepresent the switch periods of power converting system 4100.
If M = t on 2 2 &times; L p &times; T s - - - ( 68 )
, according to equation 67,
I in＝M×V in
(69)
According to an embodiment, as shown in figure 41, the switch periods T of power converting system 4100 sconstant, and t onwithin at least one cycle of AC input signal 4115, be constant; Therefore, M is also positive integer within least one cycle of AC input signal 4115, and the power factor of power converting system 4100 (PF) equals 1 or be substantially equal to 1.For example, the power factor of power converting system 4100 (PF) is equal to or greater than 0.9.According to another embodiment, by least making switching frequency keep constant and meet equation 63, the power factor (PF) of power converting system 4100 equals 1 or be substantially equal to 1.
As discussed above and emphasize at this, Figure 41 is only example, and it should not limit the scope of claim undeservedly.Those skilled in the art will recognize that many variants, substitutions and modifications.For example, power converting system 4100 comprises the one or more large value capacitors for AC input signal 4115 being converted to the DC signal being received by armature winding 4110.
With reference to Figure 41, according to an embodiment, power converting system 4100 can equal 1 or obtain constant output current be substantially equal to 1 in the situation that in power factor.According to another embodiment, power converting system 4100 is used to provide power to one or more light-emitting diodes, as shown in figure 43.
Figure 43 is the simplification diagram for the switched-mode power supply transformation system 4100 to light-emitting diode power supply according to further embodiment of this invention.This diagram is only example, and it should not limit the scope of claim undeservedly.Those skilled in the art will recognize that many variants, substitutions and modifications.For example, power converting system 4100 is used to provide power to one or more light-emitting diodes 4310.
Figure 44 is according to the simplification diagram of the switched-mode power supply transformation system with primary side sensing and adjustment of further embodiment of this invention.This diagram is only example, and it should not limit the scope of claim undeservedly.Those skilled in the art will recognize that many variants, substitutions and modifications.
Power converting system 4400 comprises armature winding 4410, secondary winding 4412, auxiliary winding 4414, resistor 4420,4422 and 4424, switch 4126, amplifier 4128, switch 4430, trsanscondutance amplifier 4434, Cycle by Cycle peak value maker 4436, lead-edge-blanking assembly 4438, demagnetization detection components 4450, oscillator 4460, AND door 4466, capacitor 4458, integrator 4470, comparator 4482, multiplier 4484, trigger assembly 4490 and driven unit 4492.
For example, trsanscondutance amplifier 4434, Cycle by Cycle peak value maker 4436, lead-edge-blanking assembly 4438, demagnetization detection components 4450, oscillator 4460, AND door 4466, integrator 4470, comparator 4482, multiplier 4484, trigger assembly 4490 and driven unit 4492 are positioned on chip 4440.In another example, chip 4440 at least comprises terminal 4442,4444,4446 and 4448.In another example, system 4400 is switching mode flyback power supply transformation systems.In another example, integrator 4470 is Cycle by Cycle integrators that (for example, when, the demagnetization processing in each switch periods finishes) is reset after each switch periods.
According to an embodiment, armature winding 4410, secondary winding 4412, auxiliary winding 4414, resistor 4420, 4422 and 4424, switch 4430, trsanscondutance amplifier 4434, Cycle by Cycle peak value maker 4436, lead-edge-blanking assembly 4438, demagnetization detection components 4450, oscillator 4460, AND door 4466, capacitor 4458, integrator 4470, comparator 4482, trigger assembly 4490 and driven unit 4492 are identical with following assembly respectively: armature winding 4110, secondary winding 4112, auxiliary winding 4114, resistor 4120, 4122 and 4124, switch 4130, trsanscondutance amplifier 4134, Cycle by Cycle peak value maker 4136, lead-edge-blanking assembly 4138, demagnetization detection components 4150, oscillator 4160, AND door 4166, capacitor 4158, integrator 4170, comparator 4182, trigger assembly 4190 and driven unit 4192.
According to another embodiment, switch 4493 is by driving signal 4493 to control.For example, be logic high if drive signal 4493, switch 4493 closures.In another embodiment, in the time that switch 4493 is closed, feedback signal 4443 (for example, V fB) for example, be clamped to ground level by amplifier 4428 (, operational amplifier).In another example, feedback signal 4443 (for example, V fB) be set to zero, and current signal 4483 is determined by following formula
I FB = V aux R 1 = ( N aux N p &times; V in ) / R 1 &Proportional; V in - - - ( 70 )
Wherein, I fBrepresent current signal 4483.In addition, V inrepresent through rectification input voltage 4413, and V auxrepresent boost voltage 4419.In addition N, auxthe number of turn of auxiliary winding 4414, and N pit is the number of turn of armature winding 4410.In addition R, 1represent the resistance value of resistor 4420.
In another example, based on equation 70, current signal 4483 is with proportional through rectification input voltage 4413, as follows:
I FB∝V in (71)
According to another embodiment, current signal 4483 is received by multiplier 4484, and multiplier 4484 is gone back receiver voltage signal 4481 and to comparator 4482 output signals 4485.For example, signal 4485 is determined by following formula:
V mo＝b×V cmp×I FB (72)
Wherein, V morepresent signal 4485.In addition, V cmprepresent voltage signal 4481, and b is the constant coefficients of multiplier 4484.
In another example, equation 72 can be found out with equation 64 is combined, signal 4485 with signal 4185 similar and with voltage signal 4481 and long-pending proportional, as follows through rectification input voltage 4413:
V mo∝V cmp×V in (73)
According to an embodiment, power converting system 4400 intentions make
Figure BSA00000443883900801
and T skeep constant, to make output current I okeep constant.For example, make by least meeting equation 63
Figure BSA00000443883900802
keep constant.In another example, make T by oscillator 4460 skeep constant.
According to another embodiment, as shown at least equation 73, by least making switching frequency keep constant and meet equation 63, the power factor (PF) of power converting system 4400 equals 1 or be substantially equal to 1.For example, the power factor of power converting system 4400 (PF) is equal to or greater than 0.9.
As discussed above and emphasize at this, Figure 44 is only example, and it should not limit the scope of claim undeservedly.Those skilled in the art will recognize that many variants, substitutions and modifications.For example, power converting system 4400 comprises the one or more large value capacitors for AC input signal 4415 being converted to the DC signal being received by armature winding 4410.
With reference to Figure 44, according to an embodiment, power converting system 4400 can equal 1 or obtain constant output current be substantially equal to 1 in the situation that in power factor.According to another embodiment, power converting system 4400 is used to provide power to one or more light-emitting diodes, as shown in figure 45.
Figure 45 is the simplification diagram for the switched-mode power supply transformation system 4400 to light-emitting diode power supply according to further embodiment of this invention.This diagram is only example, and it should not limit the scope of claim undeservedly.Those skilled in the art will recognize that many variants, substitutions and modifications.For example, power converting system 4400 is used to provide power to one or more light-emitting diodes 4510.
According to another embodiment, a kind of for the system of adjusting supply convertor (for example, comprising as shown in figure 21): first signal maker (for example, as shown in assembly 2150), is configured to receive the first sensing signal and generates the output signal being associated with demagnetization.Described the first sensing signal is relevant with the first winding of secondary winding that is coupled to supply convertor, and described secondary winding is at least associated with the output current of described supply convertor.In addition, this system (for example comprises ramp signal maker, as shown in the combination of assembly 2170,2160,2162,2164,2166 and 2172), be configured to receive described output signal and generate ramp signal (for example,, as shown in signal 2165); And first comparator (for example, as shown in assembly 2182), (be for example configured to receive described ramp signal and first threshold signal, as shown in signal 2183), and at least based on Information generation first comparison signal of described ramp signal and described first threshold signal correction connection.In addition, this system comprises the second comparator (for example, as shown in assembly 2180), is configured to receive the second sensing signal (for example,, as shown in signal 2147) and Second Threshold signal and generates the second comparison signal.Described the second sensing signal is associated with the first electric current of the armature winding of the secondary winding that is coupled to described supply convertor of flowing through.In addition, this system comprises secondary signal maker (for example, as shown in assembly 2190), is configured at least receive described the first comparison signal and described the second comparison signal and generates modulation signal (for example,, as shown in signal 2191); And gate driver (for example, as shown in assembly 2192), be configured to receive described modulation signal and for example, to switch output drive signal (, as shown in signal 2193).Described switch is configured to affect described first electric current of the described armature winding of flowing through.Described output signal and demagnetization duration (for example, T demag) be associated, and described driving signal and switch periods (for example, T s) be associated.This system is also configured to make described demagnetization duration and the ratio of described switch periods to keep constant.
According to another embodiment, a kind ofly for example, comprise and receive the first sensing signal for adjusting the method (, as Figure 21 realize) of supply convertor.Described the first sensing signal is associated with the first winding of the secondary winding that is coupled to supply convertor, and described secondary winding is at least relevant with the output current of described supply convertor.In addition, the method comprises at least Information generation output signal based on being associated with described the first sensing signal.Described output signal is associated with demagnetization.In addition, the method comprises the described output signal of reception; At least Information generation ramp signal based on being associated with described output signal; Receive described ramp signal and first threshold signal; Process the information with described ramp signal and described first threshold signal correction connection; At least based on Information generation first comparison signal of described ramp signal and described first threshold signal correction connection.In addition, the method comprises reception the second sensing signal and Second Threshold signal.Described the second sensing signal is associated with the first electric current of the armature winding of the secondary winding that is coupled to described supply convertor of flowing through.In addition, the method comprises the information of processing with described the second sensing signal and described Second Threshold signal correction connection; At least based on Information generation second comparison signal of described the second sensing signal and described Second Threshold signal correction connection; Receive described the first comparison signal and described the second comparison signal; Process the information being associated with described the first comparison signal and described the second comparison signal; At least Information generation modulation signal based on being associated with described the first comparison signal and described the second comparison signal.In addition, the method comprises the described modulation signal of reception; At least come to switch output drive signal, to affect described first electric current of the described armature winding of flowing through based on the information being associated with described modulation signal.Described output signal was associated with the demagnetization duration, and described driving signal is associated with switch periods.Make described demagnetization duration and the ratio of described switch periods keep constant.
According to another embodiment, a kind of for the system of adjusting supply convertor (for example, as shown in Fig. 7 or Figure 24) (for example comprise first signal maker, as shown in assembly 520 or assembly 2420), be configured at least receive input signal and at least generate the output signal being associated with demagnetization, described input signal is at least associated with the output current of supply convertor.In addition, this system (for example comprises the first controller, as assembly 542 or as shown in the combination of assembly 2510,2520,2620 and 2635), be configured at least receive described output signal, and at least the information based on being associated with described output signal at least generates the first control signal; Second controller (for example, as shown in assembly 540 or assembly 2440), is configured to receive the first sensing signal and first threshold signal and generates the second control signal.Described the first sensing signal is associated with the first electric current of the armature winding of the described supply convertor of flowing through.In addition, this system comprises oscillator (for example, as shown in assembly 562 or assembly 2462), be configured at least receive described the first control signal, and at least the information based on being associated with described the first control signal is carried out at least generated clock signal; Secondary signal maker (for example, as shown in assembly 538 or assembly 2438), is configured at least receive described clock signal and described the second control signal, and at least generates modulation signal.In addition, this system comprises gate driver (for example, as shown in assembly 546 or assembly 2446), is configured at least receive described modulation signal and at least output drive signal of switch.Described switch is configured to affect described first electric current of the described armature winding of flowing through.Described output signal and demagnetization duration (for example, T demag) be associated, and described driving signal and switch periods (for example, T s) be associated.This system is also configured to make described demagnetization duration and the ratio of described switch periods to keep constant, and makes the peak value of described the first sensing signal keep in size constant.
According to another embodiment, a kind ofly comprising for the method (for example,, as Fig. 7 or Figure 24 realize) of adjusting supply convertor: at least receive input signal, and at least the information based on being associated with described input signal is carried out at least generating output signal.Described input signal is at least relevant with the output current of supply convertor, and described output signal is relevant with demagnetization.In addition, the method comprises and at least receives described output signal; Process the information being associated with described output signal; At least the information based on being associated with described output signal is carried out at least generated clock signal.In addition, the method comprises reception sensing signal and threshold signal.Described sensing signal is associated with the first electric current of the armature winding of the described supply convertor of flowing through.In addition, the method comprises the information being associated with described sensing signal and described threshold signal of processing; At least Information generation control signal based on being associated with described sensing signal and described threshold signal; At least receive described clock signal and described control signal; Process the information being associated with described clock signal and described control signal; At least the information based on being associated with described clock signal and described control signal at least generates modulation signal.In addition, the method comprises and at least receives described modulation signal; At least the information based on being associated with described modulation intelligence is at least output drive signal of switch, to affect described first electric current of the described armature winding of flowing through.Described output signal was associated with the demagnetization duration, and described driving signal is associated with switch periods.Make described demagnetization duration and the ratio of described switch periods keep constant, and make the peak value of described the first sensing signal keep in size constant.
According to another embodiment, a kind of for the system of adjusting supply convertor (for example, as shown in Figure 28 or 32) (for example comprise first signal maker, as shown in assembly 2850), be configured to receive the first sensing signal and generate the first output signal being associated with demagnetization.Described the first sensing signal is relevant with the first winding of secondary winding that is coupled to supply convertor, and described secondary winding is at least associated with the output current of described supply convertor.In addition, this system (for example comprises the first ramp signal maker, as shown in the combination of assembly 2860,2862,2864,2866,2870 and 2872), be configured to receive described the first output signal and generate the first ramp signal (for example,, as shown in signal 2865); The first comparator (for example, as shown in assembly 2882), (be for example configured to receive described the first ramp signal and first threshold signal, as shown in signal 2883), and at least based on Information generation first comparison signal (for example,, as shown in signal 2885) of described the first ramp signal and described first threshold signal correction connection.In addition, this system comprises that peak detector (for example, as shown in assembly 2836), be configured to receive and (for example drive signal, as shown in signal 2893) and the second sensing signal is (for example, as shown in signal 2847) and generate peak signal (for example,, as shown in signal 2837).Described the second sensing signal is associated with the first electric current of the armature winding of the secondary winding that is coupled to described supply convertor of flowing through.In addition, this system comprises that amplifier (for example, as shown in assembly 2834), (be for example configured to receive described peak signal and Second Threshold signal, as shown in signal 2835) and (for example generate the second output signal by capacitor, as shown in signal 2881), described capacitor is coupled to described amplifier; The second comparator (for example, as shown in assembly 2880), be configured to receive described the second output signal and the second ramp signal (for example,, as shown in signal 2833), and generate the second comparison signal (for example,, as shown in signal 2887).In addition, this system comprises secondary signal maker (for example, as shown in assembly 2890), is configured at least receive described the first comparison signal and described the second comparison signal, and generates modulation signal (for example,, as shown in signal 2891); And gate driver (for example, as shown in assembly 2892), be configured to receive described modulation signal and export described driving signal to described peak detector and switch.Described switch is configured to affect described first electric current of the described armature winding of flowing through.
According to another embodiment, a kind ofly comprise and receive the first sensing signal for adjusting the method (for example,, as Figure 28 or Figure 32 realize) of supply convertor.Described the first sensing signal is associated with the first winding of the secondary winding that is coupled to supply convertor, and described secondary winding is at least relevant with the output current of described supply convertor.In addition, the method comprises at least Information generation the first output signal based on being associated with described the first sensing signal; Receive described the first output signal; At least Information generation the first ramp signal based on being associated with described the first output signal.Described the first output signal is relevant with demagnetization.In addition, the method comprises described the first ramp signal of reception and first threshold signal; Process the information with described the first ramp signal and described first threshold signal correction connection; At least based on Information generation first comparison signal of described the first ramp signal and described first threshold signal correction connection; Receive and drive signal and the second sensing signal.Described the second sensing signal is associated with the first electric current of the armature winding of the secondary winding that is coupled to described supply convertor of flowing through.In addition, the method comprises the information being associated with described driving signal and described the second sensing signal of processing; At least Information generation peak signal based on being associated with described driving signal and described the second sensing signal; Receive described peak signal and Second Threshold signal; Process the information with described peak signal and described Second Threshold signal correction connection; At least based on Information generation second output signal of described peak signal and described Second Threshold signal correction connection.In addition, the method comprises described the second output signal of reception and the second ramp signal; Process the information being associated with described the second output signal and described the second ramp signal; At least Information generation the second comparison signal based on being associated with described the second output signal and described the second ramp signal.In addition, the method comprises described the first comparison signal of reception and described the second comparison signal; Process the information being associated with described the first comparison signal and described the second comparison signal; At least Information generation modulation signal based on being associated with described the first comparison signal and described the second comparison signal.In addition, the method comprises the described modulation signal of reception; And at least the information based on being associated with described modulation signal is exported described driving signal, to affect described first electric current of the described armature winding of flowing through.
According to another embodiment, a kind of for the system of adjusting supply convertor (for example, as shown in Figure 28 or 32) (for example comprise first signal maker, as shown in assembly 2850), be configured to receive the first sensing signal and generate the output signal (for example,, as shown in signal 2851) being associated with demagnetization.Described the first sensing signal is associated with the first winding of the secondary winding that is coupled to supply convertor, and described secondary winding is at least relevant with the output current of described supply convertor.In addition, this system comprises peak detector (for example, as shown in assembly 2836), is configured to receive driving signal and the second sensing signal and generates peak signal (for example,, as shown in signal 2837).Described the second sensing signal is associated with the first electric current of the armature winding of the secondary winding that is coupled to described supply convertor of flowing through.In addition, this system (for example comprises secondary signal maker, as shown in assembly 2890), be configured at least process with described output signal (for example, as shown in signal 2851) and as described in peak signal (for example, as shown in signal 2837) information that is associated, and generate modulation signal (for example,, as shown in signal 2891).In addition, this system comprises gate driver (for example, as shown in assembly 2892), is configured to receive described modulation signal and exports described driving signal to described peak detector and switch.Described switch is configured to affect described first electric current of the described armature winding of flowing through.Described output signal and demagnetization duration (for example, T demag) be associated, and described driving signal and switch periods (for example, T s) be associated.This system is also configured to make described demagnetization duration and the ratio of described switch periods to keep constant; And make the mean size of described peak signal for example, keep constant during the first duration (, T).
According to another embodiment, a kind of for adjust supply convertor method (for example, as Figure 28 or 32 realize) comprise receive the first sensing signal.Described the first sensing signal is associated with the first winding of the secondary winding that is coupled to supply convertor, and described secondary winding is at least relevant with the output current of described supply convertor.In addition, the method comprises at least Information generation output signal based on being associated with described the first sensing signal; Receive and drive signal and the second sensing signal; And process and the information that drives signal and the second sensing signal to be associated.The first sensing signal is associated with demagnetization, and described the second sensing signal is associated with the first electric current of the armature winding of the secondary winding that is coupled to described supply convertor of flowing through.In addition, the method comprises at least Information generation peak signal based on being associated with described driving signal and described the second sensing signal; At least process the information being associated with described output signal and described peak signal; At least Information generation modulation signal based on being associated with described output signal and described peak signal.In addition, the method comprises the described modulation signal of reception; At least the information based on being associated with described modulation signal is exported described driving signal to switch, at least to affect described first electric current of the described armature winding of flowing through.Described output signal and demagnetization duration (for example, T demag) be associated, and described driving signal and switch periods (for example, T s) be associated.Make described demagnetization duration and the ratio of described switch periods keep constant; And make the mean size of described peak signal for example, keep constant during the first duration (, T).
According to another embodiment, a kind of for the system of adjusting supply convertor (for example, as shown in Figure 33, Figure 39 or Figure 40) (for example comprise first signal maker, as shown in assembly 3350), be configured to receive the first sensing signal and generate the first output signal being associated with demagnetization.Described the first sensing signal is relevant with the first winding of secondary winding that is coupled to supply convertor, and described secondary winding is at least associated with the output current of described supply convertor.In addition, this system comprises that peak detector (for example, as shown in assembly 3336), be configured to receive and (for example drive signal, as shown in signal 3393) and the second sensing signal is (for example, as shown in signal 3347) and generate peak signal (for example,, as shown in signal 3337).Described the second sensing signal is associated with the first electric current of the armature winding of the secondary winding that is coupled to described supply convertor of flowing through.In addition, this system comprises secondary signal maker (for example, as shown in assembly 3370), is configured to receive described driving signal, described the first output signal and described peak signal, and generate the second output signal (for example,, as shown in signal 3372); Amplifier (for example, as shown in assembly 3334), (be for example configured to receive described the second output signal and threshold signal, as shown in signal 3335) and (for example generate the 3rd output signal by capacitor, as shown in signal 3381), described capacitor is coupled to described amplifier.In addition, this system comprises comparator (for example,, as shown in assembly 3382), (be for example configured to receive described the 3rd output signal and ramp signal, as shown in signal 3364), and generate comparison signal (for example,, as shown in signal 3385); The 3rd signal generator (for example, as shown in the combination of assembly 3366 and 3390), be configured at least receive described comparison signal and clock signal (for example,, as shown in assembly 3362), and generate modulation signal (for example,, as shown in assembly 3368).In addition, this system comprises gate driver (for example, as shown in assembly 3392), is configured to receive described modulation signal and exports described driving signal to described peak detector, described secondary signal maker and switch.Described switch is configured to affect described first electric current of the described armature winding of flowing through.
According to another embodiment, a kind ofly comprise and receive the first sensing signal for adjusting the method (for example,, as Figure 33, Figure 39 or Figure 40 realize) of supply convertor.Described the first sensing signal is relevant with the first winding of secondary winding that is coupled to supply convertor, and described secondary winding is at least associated with the output current of described supply convertor.In addition, the method comprises the first output signal that generation and demagnetization are associated; Receive and drive signal and the second sensing signal.Described the second sensing signal is associated with the first electric current of the armature winding of the secondary winding that is coupled to described supply convertor of flowing through.In addition, the method comprises the information being associated with described driving signal and described the second sensing signal of processing; At least Information generation peak signal based on being associated with described driving signal and described the second sensing signal.In addition, the method comprises reception described driving signal, described the first output signal and described peak signal; Process the information being associated with described driving signal, described the first output signal and described peak signal; At least Information generation the second output signal based on being associated with described driving signal, described the first output signal and described peak signal.In addition, the method comprises described the second output signal of reception and threshold signal; Process the information being associated with described the second output signal and described threshold signal; At least Information generation the 3rd output signal based on being associated with described the second output signal and described threshold signal.In addition, the method comprises described the 3rd output signal and the ramp signal of reception; Process the information being associated with described the 3rd output signal and described ramp signal; At least Information generation comparison signal based on being associated with described the 3rd output signal and described ramp signal.In addition, the method comprises the described comparison signal of reception and clock signal; Process the information being associated with described comparison signal and described clock signal; At least Information generation modulation signal based on being associated with described comparison signal and described clock signal.In addition, the method comprises the described modulation signal of reception; And at least the information based on being associated with described modulation signal is exported described driving signal, to affect described first electric current of the described armature winding of flowing through.
According to another embodiment, a kind of for the system of adjusting supply convertor (for example, as shown in Figure 41 or 43) (for example comprise first signal maker, as shown in assembly 4150), (be for example configured to receive the first sensing signal, as shown in signal 4143) and generate the first output signal (for example,, as shown in signal 4151) being associated with demagnetization.Described the first sensing signal is associated with the first winding of the secondary winding that is coupled to supply convertor, and described secondary winding is at least relevant with the output current of described supply convertor.In addition, this system comprises that peak detector (for example, as shown in assembly 4136), be configured to receive and (for example drive signal, as shown in signal 4193) and the second sensing signal is (for example, as shown in signal 4147) and generate peak signal (for example,, as shown in signal 4137).Described the second sensing signal is associated with the first electric current of the armature winding of the secondary winding that is coupled to described supply convertor of flowing through, and secondary signal maker (for example, as shown in assembly 4170) be configured at least receive as described in driving signal, as described in the first output signal and as described in peak signal, and generate the second output signal (for example,, as shown in signal 4172).In addition, this system comprises that amplifier (for example, as shown in assembly 4134), (be for example configured to receive described the second output signal and threshold signal, as shown in signal 4135) and generate the 3rd output signal (for example,, as shown in signal 4181) by capacitor; The 3rd signal generator (for example, as shown in assembly 4184), be configured to receive described the 3rd output signal and the first input signal (for example,, as shown in signal 4183) and generate the 4th output signal (for example,, as shown in signal 4185).Described capacitor is coupled to described amplifier, and described the first input signal is for example, with the second input signal (, as shown in signal 4113) being received by described armature winding proportional.In addition, this system comprises comparator (for example, as shown in assembly 4182), is configured to receive described the 4th output signal and the second sensing signal and generates comparison signal (for example,, as shown in signal 4187); The 4th signal generator (for example, as shown in the combination of assembly 4166 and 4190), be configured at least receive described comparison signal and clock signal (for example,, as shown in signal 4162) and generate modulation signal (for example,, as shown in signal 4168).In addition, this system comprises gate driver (for example, as shown in signal 4192), is configured to receive described modulation signal and exports described driving signal to described peak detector, described secondary signal maker and switch.Described switch is configured to affect described first electric current of the described armature winding of flowing through.
According to another embodiment, a kind of for adjust supply convertor method (for example, as Figure 41 or 43 realize) comprise receive the first sensing signal.Described the first sensing signal is associated with the first winding of the secondary winding that is coupled to supply convertor, and described secondary winding is at least relevant with the output current of described supply convertor.In addition, the method comprises the first output signal that generation and demagnetization are associated; Receive and drive signal and the second sensing signal.Described the second sensing signal is associated with the first electric current of the armature winding of the secondary winding that is coupled to described supply convertor of flowing through.In addition, the method comprises the information being associated with described driving signal and the second sensing signal of processing; At least Information generation peak signal based on being associated with described driving signal and described the second sensing signal.In addition, the method comprises reception described driving signal, described the first output signal and described peak signal; Process the information being associated with described driving signal, described the first output signal and described peak signal; At least Information generation the second output signal based on being associated with described driving signal, described the first output signal and described peak signal.In addition, the method comprises described the second output signal of reception and threshold signal; Process the information being associated with described the second output signal and described threshold signal; At least Information generation the 3rd output signal based on being associated with described the second output signal and described threshold signal; Receive described the 3rd output signal and the first input signal.Described the first input signal is proportional with the second input signal being received by described armature winding.In addition, the method comprises the information being associated with described the 3rd output signal and described the first input signal of processing; At least Information generation the 4th output signal based on being associated with described the 3rd output signal and described the first input signal; Receive described the 4th output signal and the second sensing signal; Process the information being associated with described the 4th output signal and described the second sensing signal; At least Information generation comparison signal based on being associated with described the 4th output signal and described the second sensing signal.In addition, the method comprises and at least receives described comparison signal and clock signal; Process the information being associated with described comparison signal and described clock signal; At least Information generation modulation signal based on being associated with described comparison signal and described clock signal.In addition, the method comprises the described modulation signal of reception; And at least the information based on being associated with described modulation signal is exported described driving signal, to affect described first electric current of the described armature winding of flowing through.
According to another embodiment, a kind of for the system of adjusting supply convertor (for example, as shown in Figure 44 or 45) comprising: first signal maker is (for example, as shown in assembly 4450), (be for example configured to receive the first sensing signal, as shown in signal 4443) and generate the first output signal (for example,, as shown in signal 4451) being associated with demagnetization.Described the first sensing signal is associated with the first winding of the secondary winding that is coupled to supply convertor, and described secondary winding is at least relevant with the output current of described supply convertor.In addition, this system comprises that peak detector (for example, as shown in assembly 4436), be configured to receive and (for example drive signal, as shown in signal 4493) and the second sensing signal is (for example, as shown in signal 4447) and generate peak signal (for example,, as shown in signal 4437).Described the second sensing signal is associated with the first electric current of the armature winding of the secondary winding that is coupled to described supply convertor of flowing through.In addition, this system comprises secondary signal maker (for example, as shown in assembly 4470), is configured at least receive described driving signal, described the first output signal and described peak signal, and generate the second output signal (for example,, as shown in signal 4472); Amplifier (for example, as shown in assembly 4434), (be for example configured to receive described the second output signal and threshold signal, as shown in signal 4435) and (for example generate the 3rd output signal by capacitor, as shown in signal 4481), described capacitor is coupled to described amplifier.In addition, this system (for example comprises the 3rd signal generator, as assembly 4426, shown in 4428 and 4484 combination), be configured to receive described the first sensing signal, described the 3rd output signal and described driving signal and generate the 4th output signal (for example,, as shown in signal 4485); Comparator (for example, as shown in assembly 4482), is configured to receive described the 4th output signal and described the second sensing signal and generates comparison signal.In addition, this system (for example comprises the 4th signal generator, as shown in the combination of assembly 4466 and 4490), (be for example configured at least receive described comparison signal and clock signal, as shown in signal 4462) and generate modulation signal (for example,, as shown in signal 4468); Gate driver (for example, as shown in assembly 4492), be configured to receive described modulation signal and export described driving signal to described peak detector, described secondary signal maker, described the 3rd signal generator and switch, described switch is configured to affect described first electric current of the described armature winding of flowing through.
According to another embodiment, a kind of for adjust supply convertor method (for example, as Figure 44 or 45 realize) comprise receive the first sensing signal.Described the first sensing signal is associated with the first winding of the secondary winding that is coupled to supply convertor, and described secondary winding is at least relevant with the output current of described supply convertor.In addition, the method comprises the first output signal that generation and demagnetization are associated; Receive and drive signal and the second sensing signal.Described the second sensing signal is associated with the first electric current of the armature winding of the secondary winding that is coupled to described supply convertor of flowing through.In addition, the method comprises the information being associated with described driving signal and the second sensing signal of processing; At least Information generation peak signal based on being associated with described driving signal and described the second sensing signal.In addition, the method comprises reception described driving signal, described the first output signal and described peak signal; Process the information being associated with described driving signal, described the first output signal and described peak signal; At least Information generation the second output signal based on being associated with described driving signal, described the first output signal and described peak signal.In addition, the method comprises described the second output signal of reception and threshold signal; Process the information being associated with described the second output signal and described threshold signal; At least Information generation the 3rd output signal based on being associated with described the second output signal and described threshold signal.In addition, the method comprises reception described the first sensing signal, described the 3rd output signal and described driving signal; Process the information with described the first sensing signal, described the 3rd output signal and described driving signal correction connection; At least based on Information generation the 4th output signal of described the first sensing signal, described the 3rd output signal and described driving signal correction connection.In addition, the method comprises described the 4th output signal of reception and described the second sensing signal; Process the information being associated with described the 4th output signal and described the second sensing signal; At least Information generation comparison signal based on being associated with described the 4th output signal and described the second sensing signal.In addition, the method comprises and at least receives described comparison signal and clock signal; Process the information being associated with described comparison signal and described clock signal; At least Information generation modulation signal based on being associated with described comparison signal and described clock signal.In addition, the method comprises the described modulation signal of reception; And at least the information based on being associated with described modulation signal is exported described driving signal, to affect described first electric current of the described armature winding of flowing through.
According to another embodiment, a kind of for the system of adjusting supply convertor (for example, as shown in Figure 33, Figure 39, Figure 40, Figure 41, Figure 43, Figure 44 or Figure 45) (for example comprise first signal maker, as shown in assembly 3350), be configured to receive the first sensing signal and generate the output signal being associated with demagnetization.Described the first sensing signal is associated with the first winding of the secondary winding that is coupled to supply convertor, and described secondary winding is at least relevant with the output current of described supply convertor.In addition, this system comprises peak detector (for example, as shown in assembly 3336), is configured to receive driving signal and the second sensing signal and generates peak signal (for example,, as shown in signal 3337).Described the second sensing signal is associated with the first electric current of the armature winding of the secondary winding that is coupled to described supply convertor of flowing through.In addition, this system (for example comprises secondary signal maker, as shown in the combination of assembly 3366 and 3390), be configured at least process with described output signal (for example, as shown in signal 3351) and as described in peak signal (for example, as shown in signal 3337) information that is associated, and generate modulation signal (for example,, as shown in signal 3368); And gate driver (for example, as shown in assembly 3392), be configured to receive described modulation signal and at least export described driving signal to described peak detector and switch.Described switch is configured to affect described first electric current of the described armature winding of flowing through.Described driving signal and switch periods (for example, T s) be associated, and described output signal and demagnetization duration (for example, T demag) be associated.The described demagnetization duration equals the peak value that demagnetizes after multiplying each other with described peak signal in size.This system is also configured to make described switch periods to keep constant, makes the mean size of described demagnetization peak value for example, keep constant during the first duration (, T), and makes described output current keep constant.
According to another embodiment, a kind ofly comprise and receive the first sensing signal for adjusting the method (for example,, as Figure 33, Figure 39, Figure 40, Figure 41, Figure 43, Figure 44 or Figure 45 realize) of supply convertor.Described the first sensing signal is associated with the first winding of the secondary winding that is coupled to supply convertor, and described secondary winding is at least relevant with the output current of described supply convertor.In addition, the method comprises the output signal that generation and demagnetization are associated; Receive and drive signal and the second sensing signal.Described the second sensing signal is associated with the first electric current of the armature winding of the secondary winding that is coupled to described supply convertor of flowing through.In addition, the method comprises the information being associated with described driving signal and described the second sensing signal of processing; At least Information generation peak signal based on being associated with described driving signal and described the second sensing signal; Process the information being associated with described output signal and described peak signal; At least Information generation modulation signal based on being associated with described output signal and described peak signal.In addition, the method comprises the described modulation signal of reception; And at least the information based on being associated with described modulation signal is exported described driving signal, to affect described first electric current of the described armature winding of flowing through.Described driving signal and switch periods (for example, T s) be associated, and described output signal and demagnetization duration (for example, T demag) be associated.The described demagnetization duration equals the peak value that demagnetizes after multiplying each other with described peak signal in size.Make described switch periods keep constant, make the mean size of described demagnetization peak value for example, keep constant during the first duration (, T), and make described output current keep constant.
Although described specific embodiment of the present invention, but it will be apparent to one skilled in the art that other embodiment that existence and described embodiment are equal to.Therefore, will understand, the present invention is not subject to the restriction of shown specific embodiment, but is only limited by the scope of claims.

Claims (62)

1. for adjusting a system for supply convertor, this system comprises:
First signal maker, be configured to receive the first sensing signal and generate the output signal being associated with demagnetization, described the first sensing signal is relevant with the first winding of secondary winding that is coupled to supply convertor, and described secondary winding is at least associated with the output current of described supply convertor;
Ramp signal maker, is configured to receive described output signal and generates ramp signal;
The first comparator, is configured to receive described ramp signal and first threshold signal, and at least based on Information generation first comparison signal of described ramp signal and described first threshold signal correction connection;
The second comparator, is configured to receive the second sensing signal and Second Threshold signal and generates the second comparison signal, and described the second sensing signal is associated with the first electric current of the armature winding of the secondary winding that is coupled to described supply convertor of flowing through;
Secondary signal maker, is configured at least receive described the first comparison signal and described the second comparison signal and generates modulation signal; And
Gate driver, is configured to receive described modulation signal and to switch output drive signal, described switch is configured to affect described first electric current of the described armature winding of flowing through;
Wherein:
Described output signal was associated with the demagnetization duration;
Described driving signal is associated with switch periods; And
This system is also configured to make described demagnetization duration and the ratio of described switch periods to keep constant.
2. the system as claimed in claim 1, is also configured to make the peak value of described the second sensing signal to keep in size constant.
3. system as claimed in claim 2, is also configured to make described output current to keep constant.
4. the system as claimed in claim 1, wherein:
Described ramp signal maker comprises capacitor, current source and current sink;
Wherein:
Described capacitor is configured to be discharged by described current sink in the time that described output signal is the first logic level, and is charged by described current source in the time that described output signal is the second logic level; And
Described capacitor is also configured to export described ramp signal.
5. system as claimed in claim 4, wherein:
Described the first logic level is logic high; And
Described the second logic level is logic low.
6. the system as claimed in claim 1, wherein, described secondary signal maker comprises trigger assembly.
7. for adjusting a method for supply convertor, the method comprises:
Receive the first sensing signal, described the first sensing signal is associated with the first winding of the secondary winding that is coupled to supply convertor, and described secondary winding is at least relevant with the output current of described supply convertor;
At least Information generation output signal based on being associated with described the first sensing signal, described output signal is associated with demagnetization;
Receive described output signal;
At least Information generation ramp signal based on being associated with described output signal;
Receive described ramp signal and first threshold signal;
Process the information with described ramp signal and described first threshold signal correction connection;
At least based on Information generation first comparison signal of described ramp signal and described first threshold signal correction connection;
Receive the second sensing signal and Second Threshold signal, described the second sensing signal is associated with the first electric current of the armature winding of the secondary winding that is coupled to described supply convertor of flowing through;
Process the information with described the second sensing signal and described Second Threshold signal correction connection;
At least based on Information generation second comparison signal of described the second sensing signal and described Second Threshold signal correction connection;
Receive described the first comparison signal and described the second comparison signal;
Process the information being associated with described the first comparison signal and described the second comparison signal;
At least Information generation modulation signal based on being associated with described the first comparison signal and described the second comparison signal;
Receive described modulation signal;
At least come to switch output drive signal, to affect described first electric current of the described armature winding of flowing through based on the information being associated with described modulation signal;
Wherein:
Described output signal was associated with the demagnetization duration;
Described driving signal is associated with switch periods; And
Make described demagnetization duration and the ratio of described switch periods keep constant.
8. for adjusting a system for supply convertor, this system comprises:
First signal maker, is configured at least receive input signal and at least generates the output signal being associated with demagnetization, and described input signal is at least associated with the output current of supply convertor;
The first controller, is configured at least receive described output signal, and at least the information based on being associated with described output signal at least generates the first control signal;
Second controller, is configured to receive the first sensing signal and first threshold signal and generates the second control signal, and described the first sensing signal is associated with the first electric current of the armature winding of the described supply convertor of flowing through;
Oscillator, is configured at least receive described the first control signal, and at least the information based on being associated with described the first control signal is carried out at least generated clock signal;
Secondary signal maker, is configured at least receive described clock signal and described the second control signal, and at least generates modulation signal;
Gate driver, is configured at least receive described modulation signal and at least output drive signal of switch, described switch is configured to affect described first electric current of the described armature winding of flowing through;
Wherein:
Described output signal was associated with the demagnetization duration; And
Described driving signal is associated with switch periods;
Wherein, described system is also configured to:
Make described demagnetization duration and the ratio of described switch periods keep constant; And
Make the peak value of described the first sensing signal keep in size constant.
9. system as claimed in claim 8, also comprises:
Compensation assembly, is configured at least generate compensating signal;
Wherein:
Described input signal is the combination of described compensating signal and the second sensing signal;
Described the second sensing signal is associated with the first winding of the secondary winding that is coupled to described supply convertor;
Described secondary winding is at least relevant with the described output current of described supply convertor.
10. for adjusting a method for supply convertor, the method comprises:
At least receive input signal, described input signal is at least relevant with the output current of supply convertor;
At least the information based on being associated with described input signal is carried out at least generating output signal, and described output signal is relevant with demagnetization;
At least receive described output signal;
Process the information being associated with described output signal;
At least the information based on being associated with described output signal is carried out at least generated clock signal;
Receive sensing signal and threshold signal, described sensing signal is associated with the first electric current of the armature winding of the described supply convertor of flowing through;
Process the information being associated with described sensing signal and described threshold signal;
At least Information generation control signal based on being associated with described sensing signal and described threshold signal;
At least receive described clock signal and described control signal;
Process the information being associated with described clock signal and described control signal;
At least the information based on being associated with described clock signal and described control signal at least generates modulation signal;
At least receive described modulation signal;
At least the information based on being associated with described modulation signal is at least output drive signal of switch, to affect described first electric current of the described armature winding of flowing through;
Wherein:
Described output signal was associated with the demagnetization duration;
Described driving signal is associated with switch periods;
Make described demagnetization duration and the ratio of described switch periods keep constant; And
Make the peak value of described the first sensing signal keep in size constant.
11. 1 kinds for adjusting the system of supply convertor, and this system comprises:
First signal maker, be configured to receive the first sensing signal and generate the first output signal being associated with demagnetization, described the first sensing signal is relevant with the first winding of secondary winding that is coupled to supply convertor, and described secondary winding is at least associated with the output current of described supply convertor;
The first ramp signal maker, is configured to receive described the first output signal and generates the first ramp signal;
The first comparator, is configured to receive described the first ramp signal and first threshold signal, and at least based on Information generation first comparison signal of described the first ramp signal and described first threshold signal correction connection;
Peak detector, is configured to receive and drives signal and the second sensing signal and generate peak signal, and described the second sensing signal is associated with the first electric current of the armature winding of the secondary winding that is coupled to described supply convertor of flowing through;
Amplifier, is configured to receive described peak signal and Second Threshold signal and generates the second output signal by capacitor, and described capacitor is coupled to described amplifier;
The second comparator, is configured to receive described the second output signal and the second ramp signal, and generates the second comparison signal;
Secondary signal maker, is configured at least receive described the first comparison signal and described the second comparison signal, and generates modulation signal; And
Gate driver, is configured to receive described modulation signal and exports described driving signal to described peak detector and switch, and described switch is configured to affect described first electric current of the described armature winding of flowing through.
12. systems as claimed in claim 11, wherein:
Described the first output signal was associated with the demagnetization duration;
Described driving signal is associated with switch periods; And
This system is also configured to make described demagnetization duration and the ratio of described switch periods to keep constant.
13. systems as claimed in claim 12, are also configured to make the mean size of described peak signal to keep constant at the first duration.
14. systems as claimed in claim 13, are also configured to make described output current to keep constant.
15. systems as claimed in claim 11, wherein, described peak signal is illustrated in the peak value size of interior described second sensing signal of each switch periods of described driving signal.
16. systems as claimed in claim 11, wherein:
Described the first ramp signal maker comprises capacitor, current source and current sink;
Wherein:
Described capacitor is configured to be discharged by described current sink in the time that described the first output signal is the first logic level, and is charged by described current source in the time that described the first output signal is the second logic level; And
Described capacitor is also configured to export described the first ramp signal.
17. systems as claimed in claim 16, wherein:
Described the first logic level is logic high; And
Described the second logic level is logic low.
18. systems as claimed in claim 11, wherein, described secondary signal maker comprises trigger assembly.
19. systems as claimed in claim 11, also comprise the second ramp signal maker, are configured to generate described the second ramp signal.
20. systems as claimed in claim 11, wherein, described amplifier comprises trsanscondutance amplifier.
21. 1 kinds for adjusting the method for supply convertor, and the method comprises:
Receive the first sensing signal, described the first sensing signal is associated with the first winding of the secondary winding that is coupled to supply convertor, and described secondary winding is at least relevant with the output current of described supply convertor;
At least Information generation the first output signal based on being associated with described the first sensing signal, described the first output signal is relevant with demagnetization;
Receive described the first output signal;
At least Information generation the first ramp signal based on being associated with described the first output signal;
Receive described the first ramp signal and first threshold signal;
Process the information with described the first ramp signal and described first threshold signal correction connection;
At least based on Information generation first comparison signal of described the first ramp signal and described first threshold signal correction connection;
Receive and drive signal and the second sensing signal, described the second sensing signal is associated with the first electric current of the armature winding of the secondary winding that is coupled to described supply convertor of flowing through;
Process the information being associated with described driving signal and described the second sensing signal;
At least Information generation peak signal based on being associated with described driving signal and described the second sensing signal;
Receive described peak signal and Second Threshold signal;
Process the information with described peak signal and described Second Threshold signal correction connection;
At least based on Information generation second output signal of described peak signal and described Second Threshold signal correction connection;
Receive described the second output signal and the second ramp signal;
Process the information being associated with described the second output signal and described the second ramp signal;
At least Information generation the second comparison signal based on being associated with described the second output signal and described the second ramp signal;
Receive described the first comparison signal and described the second comparison signal;
Process the information being associated with described the first comparison signal and described the second comparison signal;
At least Information generation modulation signal based on being associated with described the first comparison signal and described the second comparison signal;
Receive described modulation signal; And
At least the information based on being associated with described modulation signal is exported described driving signal, to affect described first electric current of the described armature winding of flowing through.
22. 1 kinds for adjusting the system of supply convertor, and this system comprises:
First signal maker, be configured to receive the first sensing signal and generate the output signal being associated with demagnetization, described the first sensing signal is associated with the first winding of the secondary winding that is coupled to supply convertor, and described secondary winding is at least relevant with the output current of described supply convertor;
Peak detector, is configured to receive and drives signal and the second sensing signal and generate peak signal, and described the second sensing signal is associated with the first electric current of the armature winding of the secondary winding that is coupled to described supply convertor of flowing through;
Secondary signal maker, is configured at least process the information being associated with described output signal and described peak signal, and generates modulation signal; And
Gate driver, is configured to receive described modulation signal and exports described driving signal to described peak detector and switch, and described switch is configured to affect described first electric current of the described armature winding of flowing through;
Wherein:
Described output signal was associated with the demagnetization duration; And
Described driving signal is associated with switch periods;
Wherein, this system is also configured to:
Make described demagnetization duration and the ratio of described switch periods keep constant; And
Make the mean size of described peak signal keep constant at the first duration.
23. the system as claimed in claim 22, are also configured to make described output current to keep constant.
24. 1 kinds for adjusting the method for supply convertor, and the method comprises:
Receive the first sensing signal, described the first sensing signal is associated with the first winding of the secondary winding that is coupled to supply convertor, and described secondary winding is at least relevant with the output current of described supply convertor;
At least Information generation output signal based on being associated with described the first sensing signal, described the first sensing signal is relevant with demagnetization;
Receive and drive signal and the second sensing signal;
Process the information that is associated with described driving signal and described the second sensing signal, described the second sensing signal is associated with the first electric current of the armature winding of the secondary winding that is coupled to described supply convertor of flowing through;
At least Information generation peak signal based on being associated with described driving signal and described the second sensing signal;
At least process the information being associated with described output signal and described peak signal;
At least Information generation modulation signal based on being associated with described output signal and described peak signal;
Receive described modulation signal;
At least the information based on being associated with described modulation signal is exported described driving signal to switch, at least to affect described first electric current of the described armature winding of flowing through;
Wherein:
Described output signal was associated with the demagnetization duration;
Described driving signal is associated with switch periods;
Make described demagnetization duration and the ratio of described switch periods keep constant; And
Make the mean size of described peak signal keep constant at the first duration.
25. 1 kinds for adjusting the system of supply convertor, and this system comprises:
First signal maker, be configured to receive the first sensing signal and generate the first output signal being associated with demagnetization, described the first sensing signal is relevant with the first winding of secondary winding that is coupled to supply convertor, and described secondary winding is at least associated with the output current of described supply convertor;
Peak detector, is configured to receive and drives signal and the second sensing signal and generate peak signal, and described the second sensing signal is associated with the first electric current of the armature winding of the secondary winding that is coupled to described supply convertor of flowing through;
Secondary signal maker, is configured to receive described driving signal, described the first output signal and described peak signal, and generates the second output signal;
Amplifier, is configured to receive described the second output signal and threshold signal and generates the 3rd output signal by capacitor, and described capacitor is coupled to described amplifier;
Comparator, is configured to receive described the 3rd output signal and ramp signal, and generates comparison signal;
The 3rd signal generator, is configured at least receive described comparison signal and clock signal, and generates modulation signal;
Gate driver, is configured to receive described modulation signal and exports described driving signal to described peak detector, described secondary signal maker and switch, and described switch is configured to affect described first electric current of the described armature winding of flowing through.
26. systems as claimed in claim 25, wherein:
Described driving signal is associated with switch periods; And
This system is also configured to make described switch periods to keep constant.
27. systems as claimed in claim 26, wherein:
Described the first output signal was associated with the demagnetization duration;
After multiplying each other, described demagnetization duration and described peak signal equal in size the peak value that demagnetizes; And
This system is also configured to make the mean size of described demagnetization peak value to keep constant at the first duration.
28. systems as claimed in claim 27, are also configured to make described output current to keep constant.
29. systems as claimed in claim 25, are also configured to:
Make described output current keep constant; And
Make power factor keep equaling 1.
30. systems as claimed in claim 29, are also configured to offer one or more light-emitting diodes to output current described in major general.
31. systems as claimed in claim 25, also comprise oscillator, are configured to generate described clock signal and described ramp signal.
32. systems as claimed in claim 25, wherein, described the 3rd signal generator comprises the trigger assembly being coupled to door.
33. systems as claimed in claim 25, wherein, described the second output signal long-pending proportional with described demagnetization duration and described peak signal in size.
34. systems as claimed in claim 25, wherein, described peak signal is illustrated in the peak value size of interior described second sensing signal of each switch periods of described driving signal.
35. systems as claimed in claim 25, wherein, described amplifier comprises trsanscondutance amplifier.
36. systems as claimed in claim 25, wherein, described secondary signal maker comprises Cycle by Cycle integrator, described Cycle by Cycle integrator is reset for each switch periods.
37. 1 kinds for adjusting the method for supply convertor, and the method comprises:
Receive the first sensing signal, described the first sensing signal is relevant with the first winding of secondary winding that is coupled to supply convertor, and described secondary winding is at least associated with the output current of described supply convertor;
Generate the first output signal being associated with demagnetization;
Receive and drive signal and the second sensing signal, described the second sensing signal is associated with the first electric current of the armature winding of the secondary winding that is coupled to described supply convertor of flowing through;
Process the information being associated with described driving signal and described the second sensing signal;
At least Information generation peak signal based on being associated with described driving signal and described the second sensing signal;
Receive described driving signal, described the first output signal and described peak signal;
Process the information being associated with described driving signal, described the first output signal and described peak signal;
At least Information generation the second output signal based on being associated with described driving signal, described the first output signal and described peak signal;
Receive described the second output signal and threshold signal;
Process the information being associated with described the second output signal and described threshold signal;
At least Information generation the 3rd output signal based on being associated with described the second output signal and described threshold signal;
Receive described the 3rd output signal and ramp signal;
Process the information being associated with described the 3rd output signal and described ramp signal;
At least Information generation comparison signal based on being associated with described the 3rd output signal and described ramp signal;
Receive described comparison signal and clock signal;
Process the information being associated with described comparison signal and described clock signal;
At least Information generation modulation signal based on being associated with described comparison signal and described clock signal;
Receive described modulation signal; And
At least the information based on being associated with described modulation signal is exported described driving signal, to affect described first electric current of the described armature winding of flowing through.
38. 1 kinds for adjusting the system of supply convertor, and this system comprises:
First signal maker, be configured to receive the first sensing signal and generate the first output signal being associated with demagnetization, described the first sensing signal is associated with the first winding of the secondary winding that is coupled to supply convertor, and described secondary winding is at least relevant with the output current of described supply convertor;
Peak detector, is configured to receive and drives signal and the second sensing signal and generate peak signal, and described the second sensing signal is associated with the first electric current of the armature winding of the secondary winding that is coupled to described supply convertor of flowing through;
Secondary signal maker, is configured at least receive described driving signal, described the first output signal and described peak signal, and generates the second output signal;
Amplifier, is configured to receive described the second output signal and threshold signal and generates the 3rd output signal by capacitor, and described capacitor is coupled to described amplifier;
The 3rd signal generator, is configured to receive described the 3rd output signal and the first input signal and generates the 4th output signal, and described the first input signal is proportional with the second input signal being received by described armature winding;
Comparator, is configured to receive described the 4th output signal and the second sensing signal and generates comparison signal;
The 4th signal generator, is configured at least receive described comparison signal and clock signal and generates modulation signal;
Gate driver, is configured to receive described modulation signal and exports described driving signal to described peak detector, described secondary signal maker and switch, and described switch is configured to affect described first electric current of the described armature winding of flowing through.
39. systems as claimed in claim 38, wherein, described the 3rd signal generator comprises the multiplier for generating described the 4th output signal, described the 4th output signal equals in size described the 3rd output signal and is multiplied by described the first input signal.
40. systems as claimed in claim 38, wherein:
Described driving signal is associated with switch periods; And
This system is also configured to make described switch periods to keep constant.
41. systems as claimed in claim 38, wherein:
Described the first output signal was associated with the demagnetization duration;
After multiplying each other, described demagnetization duration and described peak signal equal in size the peak value that demagnetizes; And
This system is also configured to make the mean size of described demagnetization peak value to keep constant at the first duration.
42. systems as claimed in claim 38, are also configured to make described output current to keep constant.
43. systems as claimed in claim 38, are also configured to:
Make described output current keep constant; And
Make power factor keep equaling 1.
44. systems as claimed in claim 38, are also configured to offer one or more light-emitting diodes to output current described in major general.
45. systems as claimed in claim 38, wherein, described the second output signal long-pending proportional with described demagnetization duration and described peak signal in size.
46. systems as claimed in claim 38, wherein, described peak signal is illustrated in the peak value size of interior described second sensing signal of each switch periods of described driving signal.
47. systems as claimed in claim 38, wherein, described secondary signal maker comprises Cycle by Cycle integrator, described Cycle by Cycle integrator is reset for each switch periods.
48. 1 kinds for adjusting the method for supply convertor, and the method comprises:
Receive the first sensing signal, described the first sensing signal is associated with the first winding of the secondary winding that is coupled to supply convertor, and described secondary winding is at least relevant with the output current of described supply convertor;
Generate the first output signal being associated with demagnetization;
Receive and drive signal and the second sensing signal, described the second sensing signal is associated with the first electric current of the armature winding of the secondary winding that is coupled to described supply convertor of flowing through;
Process the information being associated with described driving signal and the second sensing signal;
At least Information generation peak signal based on being associated with described driving signal and described the second sensing signal;
Receive described driving signal, described the first output signal and described peak signal;
Process the information being associated with described driving signal, described the first output signal and described peak signal;
At least Information generation the second output signal based on being associated with described driving signal, described the first output signal and described peak signal;
Receive described the second output signal and threshold signal;
Process the information being associated with described the second output signal and described threshold signal;
At least Information generation the 3rd output signal based on being associated with described the second output signal and described threshold signal;
Receive described the 3rd output signal and the first input signal, described the first input signal is proportional with the second input signal being received by described armature winding;
Process the information being associated with described the 3rd output signal and described the first input signal;
At least Information generation the 4th output signal based on being associated with described the 3rd output signal and described the first input signal;
Receive described the 4th output signal and the second sensing signal;
Process the information being associated with described the 4th output signal and described the second sensing signal;
At least Information generation comparison signal based on being associated with described the 4th output signal and described the second sensing signal;
At least receive described comparison signal and clock signal;
Process the information being associated with described comparison signal and described clock signal;
At least Information generation modulation signal based on being associated with described comparison signal and described clock signal;
Receive described modulation signal; And
At least the information based on being associated with described modulation signal is exported described driving signal, to affect described first electric current of the described armature winding of flowing through.
49. 1 kinds for adjusting the system of supply convertor, and this system comprises:
First signal maker, be configured to receive the first sensing signal and generate the first output signal being associated with demagnetization, described the first sensing signal is associated with the first winding of the secondary winding that is coupled to supply convertor, and described secondary winding is at least relevant with the output current of described supply convertor;
Peak detector, is configured to receive and drives signal and the second sensing signal and generate peak signal, and described the second sensing signal is associated with the first electric current of the armature winding of the secondary winding that is coupled to described supply convertor of flowing through;
Secondary signal maker, is configured at least receive described driving signal, described the first output signal and described peak signal, and generates the second output signal;
Amplifier, is configured to receive described the second output signal and threshold signal and generates the 3rd output signal by capacitor, and described capacitor is coupled to described amplifier;
The 3rd signal generator, is configured to receive described the first sensing signal, described the 3rd output signal and described driving signal and generates the 4th output signal;
Comparator, is configured to receive described the 4th output signal and described the second sensing signal and generates comparison signal;
The 4th signal generator, is configured at least receive described comparison signal and clock signal and generates modulation signal;
Gate driver, be configured to receive described modulation signal and export described driving signal to described peak detector, described secondary signal maker, described the 3rd signal generator and switch, described switch is configured to affect described first electric current of the described armature winding of flowing through.
50. systems as claimed in claim 49, wherein, described the 3rd signal generator comprises:
Switch, is configured to receive described the first sensing signal and by described driving signal controlling;
Multiplier, is configured to export described the 4th output signal; And
Operational amplifier, is coupled to described switch and described multiplier.
51. systems as claimed in claim 49, wherein:
Described driving signal is associated with switch periods; And
This system is also configured to make described switch periods to keep constant.
52. systems as claimed in claim 51, wherein:
Described the first output signal was associated with the demagnetization duration;
After multiplying each other, described demagnetization duration and described peak signal equal in size the peak value that demagnetizes; And
This system is also configured to make the mean size of described demagnetization peak value to keep constant at the first duration.
53. systems as claimed in claim 52, are also configured to make described output current to keep constant.
54. systems as claimed in claim 49, are also configured to:
Make described output current keep constant; And
Make power factor keep equaling 1.
55. systems as claimed in claim 49, are also configured to offer one or more light-emitting diodes to output current described in major general.
56. systems as claimed in claim 49, wherein, described the second output signal long-pending proportional with described demagnetization duration and described peak signal in size.
57. systems as claimed in claim 49, wherein, described peak signal is illustrated in the peak value size of interior described second sensing signal of each switch periods of described driving signal.
58. systems as claimed in claim 49, wherein, described secondary signal maker comprises Cycle by Cycle integrator, described Cycle by Cycle integrator is reset for each switch periods.
59. 1 kinds for adjusting the method for supply convertor, and the method comprises:
Receive the first sensing signal, described the first sensing signal is associated with the first winding of the secondary winding that is coupled to supply convertor, and described secondary winding is at least relevant with the output current of described supply convertor;
Generate the first output signal being associated with demagnetization;
Receive and drive signal and the second sensing signal, described the second sensing signal is associated with the first electric current of the armature winding of the secondary winding that is coupled to described supply convertor of flowing through;
Process the information being associated with described driving signal and the second sensing signal;
At least Information generation peak signal based on being associated with described driving signal and described the second sensing signal;
Receive described driving signal, described the first output signal and described peak signal;
Process the information being associated with described driving signal, described the first output signal and described peak signal;
At least Information generation the second output signal based on being associated with described driving signal, described the first output signal and described peak signal;
Receive described the second output signal and threshold signal;
Process the information being associated with described the second output signal and described threshold signal;
At least Information generation the 3rd output signal based on being associated with described the second output signal and described threshold signal;
Receive described the first sensing signal, described the 3rd output signal and described driving signal;
Process the information with described the first sensing signal, described the 3rd output signal and described driving signal correction connection;
At least based on Information generation the 4th output signal of described the first sensing signal, described the 3rd output signal and described driving signal correction connection;
Receive described the 4th output signal and described the second sensing signal;
Process the information being associated with described the 4th output signal and described the second sensing signal;
At least Information generation comparison signal based on being associated with described the 4th output signal and described the second sensing signal;
At least receive described comparison signal and clock signal;
Process the information being associated with described comparison signal and described clock signal;
At least Information generation modulation signal based on being associated with described comparison signal and described clock signal;
Receive described modulation signal; And
At least the information based on being associated with described modulation signal is exported described driving signal, to affect described first electric current of the described armature winding of flowing through.
60. 1 kinds for adjusting the system of supply convertor, and this system comprises:
First signal maker, be configured to receive the first sensing signal and generate the output signal being associated with demagnetization, described the first sensing signal is associated with the first winding of the secondary winding that is coupled to supply convertor, and described secondary winding is at least relevant with the output current of described supply convertor;
Peak detector, is configured to receive and drives signal and the second sensing signal and generate peak signal, and described the second sensing signal is associated with the first electric current of the armature winding of the secondary winding that is coupled to described supply convertor of flowing through;
Secondary signal maker, is configured at least process the information being associated with described output signal and described peak signal, and generates modulation signal; And
Gate driver, is configured to receive described modulation signal and at least exports described driving signal to described peak detector and switch, and described switch is configured to affect described first electric current of the described armature winding of flowing through;
Wherein:
Described driving signal is associated with switch periods;
Described output signal was associated with the demagnetization duration; And
After multiplying each other, described demagnetization duration and described peak signal equal in size the peak value that demagnetizes;
Wherein, this system is also configured to:
Make described switch periods keep constant;
Make the mean size of described demagnetization peak value keep constant at the first duration; And
Make described output current keep constant.
61. systems as claimed in claim 60, are also configured to make power factor to keep equaling 1.
62. 1 kinds for adjusting the method for supply convertor, and the method comprises:
Receive the first sensing signal, described the first sensing signal is associated with the first winding of the secondary winding that is coupled to supply convertor, and described secondary winding is at least relevant with the output current of described supply convertor;
Generate the output signal being associated with demagnetization;
Receive and drive signal and the second sensing signal, described the second sensing signal is associated with the first electric current of the armature winding of the secondary winding that is coupled to described supply convertor of flowing through;
Process the information being associated with described driving signal and described the second sensing signal;
At least Information generation peak signal based on being associated with described driving signal and described the second sensing signal;
Process the information being associated with described output signal and described peak signal;
At least Information generation modulation signal based on being associated with described output signal and described peak signal;
Receive described modulation signal; And
At least the information based on being associated with described modulation signal is exported described driving signal, to affect described first electric current of the described armature winding of flowing through;
Wherein:
Described driving signal is associated with switch periods;
Described output signal was associated with the demagnetization duration; And
After multiplying each other, described demagnetization duration and described peak signal equal in size the peak value that demagnetizes;
Wherein:
Make described switch periods keep constant;
Make the mean size of described demagnetization peak value keep constant at the first duration; And make described output current keep constant.
CN201110051423.2A 2008-10-21 2011-02-28 System and method used for constant-voltage mode and constant-current mode in flyback supply convertor Active CN102651613B (en)

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CN201110051423.2A CN102651613B (en) 2011-02-28 2011-02-28 System and method used for constant-voltage mode and constant-current mode in flyback supply convertor
US13/071,384 US8488342B2 (en) 2008-10-21 2011-03-24 Systems and methods for constant voltage mode and constant current mode in flyback power converters with primary-side sensing and regulation
TW100129097A TWI448060B (en) 2011-02-28 2011-08-15 A system and method for adjusting a power converter
US13/857,836 US9350252B2 (en) 2008-10-21 2013-04-05 Systems and methods for protecting power conversion systems based on at least feedback signals
US13/915,477 US9385612B2 (en) 2008-10-21 2013-06-11 Systems and methods for constant voltage mode and constant current mode in flyback power converters with primary-side sensing and regulation
US15/099,419 US10008939B2 (en) 2008-10-21 2016-04-14 Systems and methods for protecting power conversion systems based on at least feedback signals
US15/152,362 US10277132B2 (en) 2008-10-21 2016-05-11 Systems and methods for constant voltage mode and constant current mode in flyback power converters with primary-side sensing and regulation

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