CN105407583B - Single-pole quasi-resonance LED driving device based on Buck-Boost circuit and Flyback circuit - Google Patents
Single-pole quasi-resonance LED driving device based on Buck-Boost circuit and Flyback circuit Download PDFInfo
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- CN105407583B CN105407583B CN201511023290.2A CN201511023290A CN105407583B CN 105407583 B CN105407583 B CN 105407583B CN 201511023290 A CN201511023290 A CN 201511023290A CN 105407583 B CN105407583 B CN 105407583B
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/40—Details of LED load circuits
- H05B45/44—Details of LED load circuits with an active control inside an LED matrix
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
- H02M1/4208—Arrangements for improving power factor of AC input
- H02M1/4241—Arrangements for improving power factor of AC input using a resonant converter
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33523—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
- H02M1/0054—Transistor switching losses
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention provides a single-pole quasi-resonance LED driving device based on a Buck-Boost circuit and a Flyback circuit, belonging to the field of LED driving and solving the problems that a single-pole LED driver based on a Buck-Boost circuit and a Flyback circuit is low in system efficiency and large in loss because a switch tube works at the hard switching state. The driving device enters into the work state of quasi-resonance when the transformer secondary side current is zero, the leakage inductor of the transformer primary side and the parasitic capacitor of an MOSFET form a resonance circuit, and the main resonance pathway is the leakage inductor of the transformer primary side, a sixth diode, a second inductor, and the parasitic capacitor of the MOSFET. The driving device reduces the switching loss of the MOSFET and improves the system efficiency through the quasi-resonance switching mode. The single-pole quasi-resonance LED driving device is particularly suitable for the constant current driving of LEDs.
Description
Technical field
The present invention relates to a kind of one pole quasi-resonance LED drive device based on Buck-Boost circuits and Flyback circuits,
Belong to field of LED drive.
Background technology
The advantages of LED is because of long working life, environment friendly and pollution-free, the photochromic pure and high working efficiency that lights, is widely used
In multiple fields such as street lighting, room lighting and LCD backlight light sources.With the continuous maturation of LED encapsulation technologies, LED is
Present the trend for replacing conventional fluorescent.The characteristic of LED constant current driving is followed, the LED drive circuit of efficient stable is subject to
The extensive concern of researcher.
Existing LED drive circuit can be divided into unipolar drive circuits and the two poles of the earth drive circuit, the front pole of the two poles of the earth drive circuit
For PFC power factor correction modules, after extremely DC-DC converter, because in front and back the two poles of the earth use respective power tube, therefore the two poles of the earth drive
The volume of circuit is larger, and system reliability is low, high cost.Existing unipolar drive circuits solve the two poles of the earth drive circuit volume compared with
Greatly, system reliability is low, the problem of high cost, but still has deficiency：For example based on Buck-Boost circuits and Flyback circuits
One pole LED driver, its switching tube are operated in hard switching state, are unfavorable for the raising of system effectiveness, are lost excessive.
The content of the invention
The invention aims to solve the existing one pole LED based on Buck-Boost circuits and Flyback circuits
The problem that system effectiveness is low and loss is big that driver is caused because switching tube is operated in hard switching state, it is proposed that one kind is based on
The one pole quasi-resonance LED drive device of Buck-Boost circuits and Flyback circuits.
A kind of one pole quasi-resonance LED based on Buck-Boost circuits and Flyback circuits of the present invention drives dress
Put, it includes AC power AC, the first inductance L1, the second inductance L2, the first diode D1, the second diode D2, the 3rd diode
D3, the 4th diode D4, the 5th diode D5, the 6th diode D6, the 7th diode D7, the first electric capacity C1, the first electrochemical capacitor
C2, the second electrochemical capacitor C3, the 3rd electrochemical capacitor C4, first resistor R1, second resistance R2, metal-oxide half field effect transistor Q1, amplify
Device AMP, load feedback unit 1, drive control unit 2 and transformer M；
One end of AC power AC and the first inductance L1One end connection, the first inductance L1The other end it is simultaneously electric with first
Hold C1One end, the first diode D1Positive pole and the 3rd diode D3Positive pole connection, the first diode D1Negative pole and second
Diode D2Positive pole connection, the first diode D1With the second diode D2Common port simultaneously with the 5th diode D5Positive pole
With the second electrochemical capacitor C3Positive pole connection, the second diode D2Negative pole and the 4th diode D4Negative pole connection, the two or two pole
Pipe D2With the 4th diode D4Common port simultaneously with the first electric capacity C1The other end and AC power AC other end connection, the
Five diode D5Negative pole simultaneously with the 6th diode D6Negative pole and the second inductance L2One end connection, the second inductance L2It is another
One end simultaneously with the first electrochemical capacitor C2Positive pole, metal-oxide half field effect transistor Q1Drain D and metal-oxide half field effect transistor Q1's
Parasitic capacitance C5One end connection, the 6th diode D6Positive pole and the first electrochemical capacitor C2Former limit of the negative pole with transformer M
Inductance LPDifferent name end connection, the secondary inductance L of transformer MSDifferent name end and the 7th diode D7Positive pole connection, the seven or two
Pole pipe D7Negative pole and the 3rd electrochemical capacitor C4Positive pole connection, the 7th diode D7With the 3rd electrochemical capacitor C4Common port make
For the incoming end of the positive pole of LED, the secondary inductance L of transformer MSSame Name of Ends, the 3rd electrochemical capacitor C4Negative pole and second resistance
R2One end be digitally connected, second resistance R2The other end be connected with the in-phase input end of amplifier AMP, second resistance
R2With the common port of amplifier AMP as the negative pole of LED incoming end, the out-phase input of amplifier AMP accesses reference voltage
Vref, the output end of amplifier AMP is connected with the input of load feedback unit 1, the output end of load feedback unit 1 and driving
The input connection of control unit 2,2 output end of drive control unit and metal-oxide half field effect transistor Q1Grid G connection, first
Resistance R1One end simultaneously with metal-oxide half field effect transistor Q1Source S and metal-oxide half field effect transistor Q1Parasitic capacitance C5's
The other end connects, the 3rd diode D3Negative pole, the 4th diode D4Positive pole, the second electrochemical capacitor C3Negative pole, first resistor
R1The other end and transformer M primary inductor LPSame Name of Ends with simulation be connected.
A kind of one pole quasi-resonance LED based on Buck-Boost circuits and Flyback circuits of the present invention drives dress
Put, resonant tank is formed by parasitic capacitance of the former limit leakage inductance of transformer M with metal-oxide half field effect transistor, quasi-resonance is realized
Switching mode, reduce the switching loss of metal-oxide half field effect transistor, in nominal load, the condition of nominal input voltage 220V
Under, average system efficiency is 87.72%, and highest system effectiveness can reach 90.91%, solve existing based on Buck-Boost
System effectiveness that the one pole LED driver of circuit and Flyback circuits is caused because switching tube is operated in hard switching state it is low and
The big problem of loss.
Description of the drawings
Fig. 1 is that the one pole quasi-resonance LED based on Buck-Boost circuits and Flyback circuits described in embodiment one drives
The circuit theory diagrams of dynamic device；
Fig. 2 is the discontinuous current oscillogram of Buck-Boost circuits in embodiment one；
Fig. 3 is the key operation waveforms figure of Flyback circuits in embodiment one；
Fig. 4 is the circuit theory diagrams of load feedback unit in embodiment five；
Fig. 5 is the control function module map of NCP1207 chips in embodiment six；
Fig. 6 is the control signal oscillogram of NCP1207 chips in embodiment six；
Fig. 7 is the input voltage and input current oscillogram of power factor correction unit in embodiment seven；
Fig. 8 is the oscillogram of metal-oxide half field effect transistor quasi-resonant switching in embodiment eight.
Specific embodiment
Specific embodiment one：Present embodiment, a kind of base described in present embodiment are illustrated with reference to Fig. 1, Fig. 2 and Fig. 3
In the one pole quasi-resonance LED drive device of Buck-Boost circuits and Flyback circuits, it includes AC power AC, first electric
Sense L1, the second inductance L2, the first diode D1, the second diode D2, the 3rd diode D3, the 4th diode D4, the 5th diode
D5, the 6th diode D6, the 7th diode D7, the first electric capacity C1, the first electrochemical capacitor C2, the second electrochemical capacitor C3, the 3rd electrolysis
Electric capacity C4, first resistor R1, second resistance R2, metal-oxide half field effect transistor Q1, amplifier AMP, load feedback unit 1, drive control
Unit processed 2 and transformer M；
One end of AC power AC and the first inductance L1One end connection, the first inductance L1The other end it is simultaneously electric with first
Hold C1One end, the first diode D1Positive pole and the 3rd diode D3Positive pole connection, the first diode D1Negative pole and second
Diode D2Positive pole connection, the first diode D1With the second diode D2Common port simultaneously with the 5th diode D5Positive pole
With the second electrochemical capacitor C3Positive pole connection, the second diode D2Negative pole and the 4th diode D4Negative pole connection, the two or two pole
Pipe D2With the 4th diode D4Common port simultaneously with the first electric capacity C1The other end and AC power AC other end connection, the
Five diode D5Negative pole simultaneously with the 6th diode D6Negative pole and the second inductance L2One end connection, the second inductance L2It is another
One end simultaneously with the first electrochemical capacitor C2Positive pole, metal-oxide half field effect transistor Q1Drain D and metal-oxide half field effect transistor Q1's
Parasitic capacitance C5One end connection, the 6th diode D6Positive pole and the first electrochemical capacitor C2Former limit of the negative pole with transformer M
Inductance LPDifferent name end connection, the secondary inductance L of transformer MSDifferent name end and the 7th diode D7Positive pole connection, the seven or two
Pole pipe D7Negative pole and the 3rd electrochemical capacitor C4Positive pole connection, the 7th diode D7With the 3rd electrochemical capacitor C4Common port make
For the incoming end of the positive pole of LED, the secondary inductance L of transformer MSSame Name of Ends, the 3rd electrochemical capacitor C4Negative pole and second resistance
R2One end be digitally connected, second resistance R2The other end be connected with the in-phase input end of amplifier AMP, second resistance
R2With the common port of amplifier AMP as the negative pole of LED incoming end, the out-phase input of amplifier AMP accesses reference voltage
Vref, the output end of amplifier AMP is connected with the input of load feedback unit 1, the output end of load feedback unit 1 and driving
The input connection of control unit 2,2 output end of drive control unit and metal-oxide half field effect transistor Q1Grid G connection, first
Resistance R1One end simultaneously with metal-oxide half field effect transistor Q1Source S and metal-oxide half field effect transistor Q1Parasitic capacitance C5's
The other end connects, the 3rd diode D3Negative pole, the 4th diode D4Positive pole, the second electrochemical capacitor C3Negative pole, first resistor
R1The other end and transformer M primary inductor LPSame Name of Ends with simulation be connected.
5th diode D5, the 6th diode D6, the second inductance L2, the first electrochemical capacitor C2, metal-oxide half field effect transistor Q1
With first resistor R1Constitute the power factor correction unit of Buck-Boost circuits, described power factor correction unit work
In DCM patterns, the current waveform of Buck-Boost circuits is as shown in Figure 2.In metal-oxide half field effect transistor Q1The T1 periods of conducting,
Input current is through the 5th diode D5, flow through the second inductance L2, the second inductance L2Electric current it is linearly increasing, while to first electric
Solution electric capacity C2Charge.By first resistor R1By the second inductance L2Peak point current be converted to corresponding magnitude of voltage, the magnitude of voltage is made
One of parameter for peak value comparison method；In metal-oxide half field effect transistor Q1The T2 periods of shut-off, the electric current in circuit are reduced, and are remained
Remaining transformer primary side leakage inductance LleakBy the 6th diode D6With the second inductance L2Feed back to the first electrochemical capacitor C2In, carry out
Energy afterflow, reduces the loss of the working stage of Buck-Boost circuits.While the 5th diode D5It is prevented from golden oxygen half
Field-effect transistor Q1During disconnection, the secondary inductance L of transformer M in Flyback circuitsSIn primary inductor LPThe reflection electricity that place produces
Pressure VORImpact to input.Reflected voltage VORClamp can input voltage, cause input current to be 0, be unfavorable for input
Current tracking input voltage so that circuit drives system power factor further cannot be improved.Through a period of time, the second inductance
L2Electric current be reduced to zero；The 3rd T3 period, it is the interrupted stage of Buck-Boost circuits, is understood according to formula (1),
Under the mode of operation of DCM, there is no phase difference in input current tracking input voltage.Therefore, when Buck-Boost circuits are worked in
When under DCM patterns, the function of preferable PFC can be played；
Iin_avgT () is average current input；
D is dutycycle；
VmIt is the voltage after input rectifying；
L2It is the second inductance；
fsIt is operating frequency；
W is power frequency 50Hz*2 π.
First electrochemical capacitor C2, metal-oxide half field effect transistor Q1, transformer M, the 7th diode D7With the 3rd electrochemical capacitor C4
Flyback circuits are constituted, its operation mode mainly there are following several stages：A) metal-oxide half field effect transistor Q1Conducting phase,
First electrochemical capacitor C2As the input power of Flyback circuits, to the primary inductor L of transformer MpCharge, primary inductor Lp's
Electric current is linearly increasing, and the LED of access is by the 3rd electrochemical capacitor C4Energy is provided；B) metal-oxide half field effect transistor Q1After disconnection, transformation
The former limit energy transmission of device M is to secondary, now, secondary inductance LsIn primary inductor LpSide produces reflected voltage VOR.By the 5th
Diode D5Avoid reflected voltage VORImpact.Now, primary inductor LpElectric current and metal-oxide half field effect transistor Q1During conducting
Reversely, leakage inductance LleakEnergy pass through the 6th diode D6, the second inductance L2Feed back to the first electrochemical capacitor C2, this portion of energy
Not over absorbing circuit consumption, it is to avoid the loss of energy.The continuous current circuit, and the afterflow of Buck-Boost circuits work
Path.Two parts circuit shares same afterflow passage, reduces topology design cost；C) when the electricity of the secondary of transformer M
When stream is zero, Flyback circuits enter the working condition of quasi-resonance, leakage inductance L of transformer primary sideleakWith MOSFET crystal
Pipe Q1Parasitic capacitance C5, resonant tank is formed, its main resonance path is Lleak-D6-L2-C5.In the path, resonance rank
Section is in metal-oxide half field effect transistor Q1Drain D, can detect to form resonant voltage waveforms between source S.D) by detecting resonance
The lowest point, now metal-oxide half field effect transistor Q1The voltage at two ends is relatively low, opens metal-oxide half field effect transistor Q1The loss for causing is most
It is little.Open position is generally less than input voltage size, metal-oxide half field effect transistor Q1It is similar to be operated in the low of ZVT
Voltage opening state, reduces switching loss, improves the efficiency of system, key operation waveforms such as Fig. 3 institutes of Flyback circuits
Show.
In Fig. 2, the implication of each parameter is：
Ibuck-boostIt is the electric current in Buck-Boost circuits；
4 is the voltage after rectification；
3 is input average current；
T1 is metal-oxide half field effect transistor ON time；
T2 is the metal-oxide half field effect transistor turn-off time；
T3 is the discontinuous current time.
In Fig. 3, the implication of each parameter is：
VDCIt is the first electrochemical capacitor C2The voltage at two ends；
N is the turn ratio of transformer M original secondary；
Vo is output voltage；
IflybackIt is the electric current in Flyback circuits；
Io is output current；
VdsIt is metal-oxide half field effect transistor Q1Drain D and source S between voltage；
IPKIt is peak point current.
Specific embodiment two：Embodiment be to the one kind described in embodiment one based on Buck-Boost circuits and
The further restriction of the one pole quasi-resonance LED drive device of Flyback circuits, the 5th diode D5, the 6th diode D6With the 7th
Diode D7It is the diode of MUR1560 models.
Specific embodiment three：Embodiment be to the one kind described in embodiment one based on Buck-Boost circuits and
The further restriction of the one pole quasi-resonance LED drive device of Flyback circuits, metal-oxide half field effect transistor Q1It is 17N80C models
Transistor.
Specific embodiment four：Embodiment be to the one kind described in embodiment one based on Buck-Boost circuits and
The further restriction of the one pole quasi-resonance LED drive device of Flyback circuits, the second inductance L2Inductance value be 231.61uH.
Specific embodiment five：Present embodiment is illustrated with reference to Fig. 4, present embodiment is to described in embodiment one
Plant the further restriction of the one pole quasi-resonance LED drive device based on Buck-Boost circuits and Flyback circuits, load feedback
Unit 1 compares amplifying circuit using TL431 benchmark, and the Constant Electric Current flow valuve of load end is converted to voltage, by divider resistance electricity
Road is compared with the 2.49V reference voltages inside TL431, so as to produce error signal.Drive is being fed back to through optocoupler PC817
Dynamic control unit 2.As a example by loading the output of 50V 1A, the parameter value of its main device is as shown in table 1.
1 TL431 amplifying circuit main devices parameters of table
Specific embodiment six：With reference to Fig. 5 and Fig. 6 explanation present embodiments, present embodiment is to one institute of embodiment
A kind of further restriction of the one pole quasi-resonance LED drive device based on Buck-Boost circuits and Flyback circuits stated, drives
, from NCP1207 chips as main control chip, its control function module map is as shown in Figure 5 for dynamic control unit 2.FB pins
The sample voltage value of receiving transformer M secondary output currents, CS pins are received and flow through metal-oxide half field effect transistor Q1Peak value electricity
The sample voltage value of stream, when the magnitude of voltage that the sampling of CS pins is obtained is equal to the magnitude of voltage that the sampling of FB pins is obtained, MOS field
Effect transistor Q1Shut-off；Demag pins detect metal-oxide half field effect transistor Q1D, S two ends quasi-resonance voltage waveform, humorous
" trough " for shaking, exports pwm pulse, makes the open-minded of metal-oxide half field effect transistor, its control control signal oscillogram such as Fig. 6 institute
Show.
Specific embodiment seven：Present embodiment is illustrated with reference to Fig. 7, present embodiment is to described in embodiment one
Plant the further restriction of the one pole quasi-resonance LED drive device based on Buck-Boost circuits and Flyback circuits, power factor
Correction unit realizes higher power factor, can reach more than 0.99, in the range of input voltage 110V～260V, THD
Within 10%, the standard of world IEC6100-3-2 is met, and its input voltage and input current waveform is as shown in fig. 7,5 is input AC
Voltage, 6 input AC electric currents.
Specific embodiment eight：Present embodiment is illustrated with reference to Fig. 8, the one kind described in present embodiment is based on Buck-
The one pole quasi-resonance LED drive device of Boost circuit and Flyback circuits, realizes the switching mode of quasi-resonance, reduces golden oxygen
The switching loss of half field effect transistor.Under conditions of nominal load, nominal input voltage 220V, system effectiveness is 87.72%.
Efficiency ranges up to 90.91%, and metal-oxide half field effect transistor quasi-resonant switching waveform is as shown in figure 8,7 is MOSFET crystal
Pipe Q1Drain D and source S between voltage, 8 be resonance " trough " export pwm pulse driving voltage.
Specific embodiment nine：A kind of described in present embodiment is based on Buck-Boost circuits and Flyback circuits
One pole quasi-resonance LED drive device, the parameter of main devices are as shown in table 2.
The main devices parameter of 2 drive circuit of table
Claims (4)
1. a kind of one pole quasi-resonance LED drive device based on Buck-Boost circuits and Flyback circuits, it is characterised in that：
It includes AC power (AC), the first inductance (L1), the second inductance (L2), the first diode (D1), the second diode (D2),
Three diode (D3), the 4th diode (D4), the 5th diode (D5), the 6th diode (D6), the 7th diode (D7), it is first electric
Hold (C1), the first electrochemical capacitor (C2), the second electrochemical capacitor (C3), the 3rd electrochemical capacitor (C4), first resistor (R1), second resistance
(R2), metal-oxide half field effect transistor (Q1), amplifier (AMP), load feedback unit (1), drive control unit (2) and transformer
(M)；
One end of AC power (AC) and the first inductance (L1) one end connection, the first inductance (L1) the other end simultaneously with first
Electric capacity (C1) one end, the first diode (D1) positive pole and the 3rd diode (D3) positive pole connection, the first diode (D1)
Negative pole and the second diode (D2) positive pole connection, the first diode (D1) and the second diode (D2) common port simultaneously with the
Five diode (D5) positive pole and the second electrochemical capacitor (C3) positive pole connection, the second diode (D2) negative pole and the four or two pole
Pipe (D4) negative pole connection, the second diode (D2) and the 4th diode (D4) common port simultaneously with the first electric capacity (C1) it is another
The other end connection of one end and AC power (AC), the 5th diode (D5) negative pole simultaneously with the 6th diode (D6) negative pole
With the second inductance (L2) one end connection, the second inductance (L2) the other end simultaneously with the first electrochemical capacitor (C2) positive pole, golden oxygen
Half field effect transistor (Q1) drain electrode (D) and metal-oxide half field effect transistor (Q1) parasitic capacitance (C5) one end connection, the six or two
Pole pipe (D6) positive pole and the first electrochemical capacitor (C2) former limit inductance (L of the negative pole with transformer (M)P) different name end connection,
Secondary inductance (the L of transformer (M)S) different name end and the 7th diode (D7) positive pole connection, the 7th diode (D7) negative pole
With the 3rd electrochemical capacitor (C4) positive pole connection, the 7th diode (D7) and the 3rd electrochemical capacitor (C4) common port as LED's
The incoming end of positive pole, the secondary inductance (L of transformer (M)S) Same Name of Ends, the 3rd electrochemical capacitor (C4) negative pole and second resistance
(R2) one end be digitally connected, second resistance (R2) the other end be connected with the in-phase input end of amplifier (AMP),
Two resistance (R2) with the common port of amplifier (AMP) as the negative pole of LED incoming end, the out-phase input of amplifier (AMP)
Access reference voltage (Vref), the output end of amplifier (AMP) is connected with the input of load feedback unit (1), load feedback list
The output end of first (1) is connected with the input of drive control unit (2), drive control unit (2) output end and MOSFET
Transistor (Q1) grid (G) connection, first resistor (R1) one end simultaneously with metal-oxide half field effect transistor (Q1) source electrode (S)
With metal-oxide half field effect transistor (Q1) parasitic capacitance (C5) the other end connection, the 3rd diode (D3) negative pole, the four or two pole
Pipe (D4) positive pole, the second electrochemical capacitor (C3) negative pole, first resistor (R1) the other end and transformer (M) former limit inductance
(LP) Same Name of Ends with simulation be connected；
5th diode (D5), the 6th diode (D6), the second inductance (L2), the first electrochemical capacitor (C2), MOSFET crystal
Pipe (Q1) and first resistor (R1) constitute the power factor correction unit of Buck-Boost circuits, described PFC
Cell operation is in DCM patterns；
First electrochemical capacitor (C2), metal-oxide half field effect transistor (Q1), transformer (M), the 7th diode (D7) and the 3rd electrolysis electricity
Hold (C4) constitute Flyback circuits.
2. a kind of one pole quasi-resonance LED based on Buck-Boost circuits and Flyback circuits according to claim 1 drives
Dynamic device, it is characterised in that：5th diode (D5), the 6th diode (D6) and the 7th diode (D7) it is MUR1560 models
Diode.
3. a kind of one pole quasi-resonance LED based on Buck-Boost circuits and Flyback circuits according to claim 1 drives
Dynamic device, it is characterised in that：Metal-oxide half field effect transistor (Q1) be 17N80C models transistor.
4. a kind of one pole quasi-resonance LED based on Buck-Boost circuits and Flyback circuits according to claim 1 drives
Dynamic device, it is characterised in that：Second inductance (L2) inductance value be 231.61uH.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511023290.2A CN105407583B (en) | 2015-12-30 | 2015-12-30 | Single-pole quasi-resonance LED driving device based on Buck-Boost circuit and Flyback circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511023290.2A CN105407583B (en) | 2015-12-30 | 2015-12-30 | Single-pole quasi-resonance LED driving device based on Buck-Boost circuit and Flyback circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105407583A CN105407583A (en) | 2016-03-16 |
| CN105407583B true CN105407583B (en) | 2017-03-22 |
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| CN106332355B (en) * | 2016-09-06 | 2018-06-01 | 上海大学 | A kind of non-isolated no electrolytic capacitor LED drive power integrated based on Boost and Flyback circuits |
| CN106793255A (en) * | 2016-11-29 | 2017-05-31 | 广西大学 | A kind of new explosion-proof mining locomotive illuminating lamp |
| CN107493638B (en) * | 2017-09-25 | 2019-10-01 | 江苏大学 | Based on BOOST-BUCK Converter Interleaving Parallel no electrolytic capacitor LED drive power and switching method |
| CN110061638B (en) * | 2018-01-19 | 2020-12-18 | 无锡华润矽科微电子有限公司 | AC-DC driving circuit and packaging structure |
| CN111130352A (en) * | 2019-12-24 | 2020-05-08 | 安克创新科技股份有限公司 | Control method of flyback switching power supply |
| CN113179021B (en) * | 2021-04-28 | 2022-07-01 | 中国民航大学 | Two-switch AC/DC LED driving device based on Flyback-Class E converter |
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| CN103636109B (en) * | 2011-06-03 | 2016-08-17 | 塞瑞斯逻辑公司 | For operating method and apparatus and the electric power distribution system of switched power transducer |
| CN103200725B (en) * | 2012-01-05 | 2016-03-30 | 金威贸易有限公司 | Piezo-electric resonance type LED driving circuit |
| CN104821729A (en) * | 2014-12-12 | 2015-08-05 | 武汉绿鼎天舒科技发展有限公司 | High-reliability illuminating device |
| CN104780692B (en) * | 2015-04-28 | 2017-06-06 | 福州大学 | A kind of single-stage is without the double Boost of bridge and Flyback integrated LED drive circuit |
| CN105163465B (en) * | 2015-10-12 | 2018-01-30 | 天津理工大学 | A kind of high-power LED street lamp power circuit system and lighting power intelligent adjusting method |
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