CN111342674A - High-efficiency high-integration high-reliability power supply controller and power supply circuit - Google Patents
High-efficiency high-integration high-reliability power supply controller and power supply circuit Download PDFInfo
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- 239000004065 semiconductor Substances 0.000 claims 1
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- 238000004804 winding Methods 0.000 description 3
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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
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/1213—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for DC-DC converters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/125—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for rectifiers
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
- H02J7/04—Regulation of charging current or voltage
- H02J7/06—Regulation of charging current or voltage using discharge tubes or semiconductor devices
-
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a high-efficiency high-integration high-reliability power supply controller and a power supply circuit, wherein the high-efficiency high-integration high-reliability power supply controller comprises a high-low voltage detection identification module and a logic control module, wherein the high-low voltage detection identification module is connected with a high-voltage power supply end to acquire a voltage value of an input power supply; the logic control module is connected with the high-low voltage detection and identification module to adjust and output PWM pulse frequency according to the voltage value of the input power supply, the PWM pulse signal drives a power transistor/MOS tube, and primary current PWM pulses of a transformer on the power circuit are modulated through the power transistor/MOS tube. Therefore, in the working process, the power supply controller detects the voltage value of the input power supply voltage in real time and adjusts the working PWM pulse frequency in real time according to the input power supply voltage, so that the whole power supply circuit can always work in an optimal state, and the working efficiency of the power supply circuit is improved.
Description
Technical Field
The invention relates to the technical field of power supplies, in particular to a high-efficiency high-integration high-reliability power supply controller and a power supply circuit.
Background
The existing charger for charging battery mainly includes two architectures, namely primary side feedback PSR architecture and secondary side feedback SSR architecture. However, no matter the primary side feedback PSR architecture or the secondary side feedback SSR architecture, the adopted power controllers all work with fixed working frequencies, and when the power circuit is in no-load, the power circuit loss is large. In the working process, the power supply controller cannot detect the voltage value of the input power supply voltage in real time, the power supply circuit is always at a fixed working frequency, and cannot be adjusted in real time according to the input power supply voltage, so that the overall working efficiency of the circuit is low. And the power supply controller can not detect the open circuit or short circuit of each pin of the controller, so that the chip of the power supply controller can be in the short circuit or open circuit, and the chip can not work normally.
In addition, the battery chargers with two existing architectures have the defects of low constant voltage and constant current precision. Wherein, the SSR of the secondary feedback framework can only reach the constant current precision of about +/-5 percent and the constant voltage precision of about +/-3-5 percent. The primary side feedback structure PSR can only reach the constant current precision of about +/-10 percent and the constant voltage precision of about +/-5 percent, has no constant power function, and cannot meet the driving requirements of a battery and a motor.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the invention aims to provide a high-efficiency high-integration high-reliability power supply controller and a charger with the same.
In one aspect, to achieve the above object, a high-efficiency high-integration high-reliability power supply controller according to an embodiment of the present invention includes:
the high-low voltage detection and identification module is connected with a high-voltage power supply end to acquire a voltage value of an input power supply;
and the logic control module is connected with the high-low voltage detection and identification module so as to adjust and output PWM pulse frequency according to the voltage value of the input power supply, the PWM pulse signal drives a power transistor, and primary current of a transformer on a power circuit is PWM pulse-modulated through the power transistor.
Further, according to an embodiment of the present invention, the high-efficiency high-integration high-reliability power supply controller further includes:
and the green energy-saving working mode identification module is respectively connected with the current detection end and the logic control end so as to reduce the PWM pulse frequency when detecting that the power supply circuit is in an idle state.
Further, according to an embodiment of the present invention, the high-efficiency high-integration high-reliability power supply controller further includes: the fault protection module is connected with the logic control module to output a fault signal to the logic control module;
the fault control module comprises a pin open-circuit short-circuit protection module which is respectively connected with each external pin end so as to carry out open-circuit or short-circuit detection on each external pin end, and when the external pin is detected to be open-circuit or short-circuit, the logic control module carries out open-circuit or short-circuit protection on the external pin.
Further, according to an embodiment of the present invention, the fault protection module further includes: the over-current protection module, the short-circuit protection module, the over-temperature protection module and the over-voltage and under-voltage protection module are one or more.
Further, according to an embodiment of the present invention, the high-efficiency high-integration high-reliability power supply controller further includes:
the load current detection module is connected with the current detection end and used for detecting the current amount when the power circuit load is loaded;
the current error detection module is connected with the on-load current detection module so as to compare and output the detected current magnitude with a current reference value;
and the current precision calibration module is connected with the current error detection module and the logic control module in decibels so as to adjust the output precision constant current PWM pulse width through a current error output value.
Further, according to an embodiment of the present invention, the high-efficiency high-integration high-reliability power supply controller further includes:
the voltage error detection module is connected with the voltage feedback end so as to compare and output the feedback voltage quantity with a voltage reference value;
and the voltage precision calibration module is respectively connected with the voltage error detection module and the logic control module so as to adjust the output precision constant voltage PWM pulse width through a voltage error output value.
Further, according to an embodiment of the present invention, the high-efficiency high-integration high-reliability power supply controller further includes:
the valley bottom detection module is connected with the voltage detection end so as to detect valley voltage of the feedback power supply voltage;
the line compensation module is respectively connected with the valley bottom detection module and the logic control module so as to compensate and output the difference between the input line voltage and the inductance of the transformer;
and the soft driving module is respectively connected with the logic control module and the power transistor so as to perform soft driving on the power transistor by valley bottom detection voltage.
Further, according to an embodiment of the present invention, the high-efficiency high-integration high-reliability power supply controller further includes:
the constant current control module is connected with the logic control module so as to output a constant current PWM pulse control signal through the logic control module;
the constant voltage control module is connected with the logic control module and outputs a constant voltage PWM pulse control signal through the logic control module;
the constant power control module is connected with the logic control module so as to output a constant power PWM pulse control signal through the logic control module;
and the working mode detection module is respectively connected with the constant current control module, the constant voltage control module, the constant power control module and the working mode control end so as to collect the setting of the working mode control end and select one of the constant current control module, the constant voltage control module and the constant power control module to control the output of the PWM pulse signal.
Further, according to an embodiment of the present invention, the high-efficiency high-integration high-reliability power supply controller further includes:
the high-voltage starting module is connected with a power supply end and/or a high-voltage power supply end so as to convert a high-voltage input power supply into a power supply of the controller;
and the chip power supply generation module is connected with the high-voltage starting module so as to convert a wide-range input power supply into a power supply of the controller.
On the other hand, an embodiment of the present invention further provides a high-efficiency, high-integration and high-reliability power circuit, including:
and the alternating current-direct current conversion circuit is connected with one end of the primary coil of the transformer so as to convert the commercial power alternating current into the first direct current power supply.
One end of a primary coil of the transformer is connected with the output end of the first direct current power supply;
a power transistor, a collector of which is connected to the other end of the primary coil of the transformer;
in the high-efficiency high-integration high-reliability power supply controller, the pulse output end of the high-efficiency high-integration high-reliability power supply controller is connected with the controlled end of the power transistor;
the output filter circuit is connected with the secondary coil of the transformer so as to stabilize the voltage of the power supply output by the secondary coil of the transformer and output a second direct-current power supply;
the primary voltage feedback circuit is respectively connected with the power supply end of the auxiliary power supply of the transformer so as to feed back the voltage of the auxiliary power supply of the transformer to the high-efficiency high-integration high-reliability power supply controller, and the width of pulse modulation is controlled by the high-efficiency high-integration high-reliability power supply controller, so that the second direct-current power supply is output in a constant voltage mode;
and the primary current feedback circuit is respectively connected with the emitter of the power transistor/or the MOS tube and the reference ground so as to control the width of pulse modulation through the high-efficiency high-integration high-reliability power supply controller and enable the second direct-current power supply to output a constant current.
The power supply controller and the power supply circuit provided by the embodiment of the invention are connected with a high-voltage power supply end through a high-voltage and low-voltage detection identification module so as to obtain the voltage value of an input power supply; the logic control module is connected with the high-low voltage detection and identification module to adjust and output PWM pulse frequency according to the voltage value of the input power supply, the PWM pulse signal drives a power transistor/MOS tube, and primary current PWM pulse modulation of a transformer on the power circuit is carried out through the power transistor/MOS tube. Therefore, in the working process, the power supply controller detects the voltage value of the input power supply voltage in real time and adjusts the working PWM pulse frequency in real time according to the input power supply voltage, so that the whole power supply circuit can always work in an optimal state, and the working efficiency of the power supply circuit is improved.
Drawings
FIG. 1 is a schematic diagram of a high-efficiency, high-integration and high-reliability power circuit according to the present invention;
fig. 2 is a block diagram of a high-efficiency, high-integration and high-reliability controller provided by the present invention.
Reference numerals:
an AC-DC conversion circuit 10;
a transformer 20;
an output filter circuit 30;
an intelligent integrated controller 40;
a built-in high-voltage starting module 401;
a chip power generation module 402;
an operating mode detection module 403;
a constant current control module 404;
a constant voltage control module 405;
a constant power control module 406;
a voltage error detection module 407;
a voltage precision calibration module 408;
a line compensation module 409;
a green energy saving work identification module 410;
a CS on-load current detection module 411;
a DCM/CCM pattern recognition module 412;
a current precision calibration module 413;
a logic control module 414;
a drive module 415;
a fault protection module 416;
a pin open short protection module 4161;
resistance open short detection 41611;
an overvoltage and undervoltage protection module 4162;
an over-temperature protection module 4163;
a short circuit protection module 4164;
an overload protection module 4165;
a high and low voltage detection identification module 417;
a valley bottom detection module 418;
a primary voltage feedback circuit 50;
a primary current feedback circuit 60;
a MOS transistor (power transistor) 70.
The objects, features and advantages of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
In one aspect, referring to fig. 1 and 2, a high-efficiency, high-integration and high-reliability power controller includes: the high-low voltage detection and identification module 417 and the logic control module 414, wherein the high-low voltage detection and identification module 417 is connected with a high-voltage power supply end to acquire a voltage value of an input power supply; as shown in fig. 1 and 2, the high-low voltage detection identification module 417 is connected to the input power supply terminal through the power supply high voltage detection pin terminal of the power supply controller chip to detect the voltage value of the input power supply.
The logic control module 414 is connected to the high/low voltage detection and identification module 417 to adjust the output PWM pulse frequency according to the voltage value of the input power, and the PWM pulse signal drives the power transistor to PWM-pulse the primary current of the transformer 20 on the power circuit through the power transistor. Specifically, after the high-voltage and low-voltage detection and identification module 417 identifies the high voltage and the low voltage of the input power supply voltage, the optimal frequency of the PWM pulse frequency within the full voltage range is adjusted by the high-voltage and low-voltage frequency division function, and the power supply circuit is enabled to work in the most efficient working state. For example, in an embodiment of the present invention, when the high/low voltage detection and identification module 417 identifies that the input power voltage is 90-140V AC input, the PWM pulse frequency may be adjusted to f-65 KHZ full-load operating state. When the high/low voltage detection and identification module 417 identifies that the input power voltage is 141-264V AC input, the PWM pulse frequency can be adjusted to f equal to 100KHZ full-load operating state. Therefore, in the working process, the power supply controller detects the voltage value of the input power supply voltage in real time and adjusts the working PWM pulse frequency in real time according to the input power supply voltage, so that the whole power supply circuit can always work in an optimal state, and the working efficiency of the power supply circuit is improved.
The power controller over-high and low voltage detection and identification module 417 provided by the embodiment of the invention is connected with a high voltage power supply end to acquire a voltage value of an input power supply; the logic control module 414 is connected to the high/low voltage detection and identification module 417 to adjust the output PWM pulse frequency according to the voltage value of the input power, and the PWM pulse signal drives the power transistor to PWM-pulse the primary current of the transformer 20 on the power circuit through the power transistor. Therefore, in the working process, the power supply controller detects the voltage value of the input power supply voltage in real time and adjusts the working PWM pulse frequency in real time according to the input power supply voltage, so that the whole power supply circuit can always work in an optimal state, and the working efficiency of the power supply circuit is improved.
Referring to fig. 2, in an embodiment of the present invention, the high-efficiency, high-integration and high-reliability power supply controller further includes: the green energy-saving working mode identification module 412 and the green energy-saving working mode identification module 412 are respectively connected with the current detection terminal and the logic control terminal to reduce the PWM pulse frequency when detecting that the power circuit is in the no-load state. As shown in fig. 2, the amount of current at the current detection terminal is detected by the green energy saving operation mode recognition module 412. Therefore, the working state of the load of the power supply circuit can be obtained, and when the load is in no load or light load, the output frequency of the PWM pulse can be adjusted to provide the overall working efficiency of the circuit. For example, in an idle state, the power supply controller reduces the number of switching cycles in a hiccup mode to improve the average working efficiency of the system; or under the light load of 10% -25%, the average working efficiency of the whole system of the power circuit is improved in a mode that the switching frequency of the power controller IC is reduced to 25-30 KHZ.
Referring to fig. 2, in an embodiment of the present invention, the high-efficiency, high-integration and high-reliability power supply controller further includes: a fault protection module 416, the fault protection module 416 being connected to the logic control module 414 to output a fault signal to the logic control module 414; that is, when a fault is detected, a fault signal may be output to the logic control module 414, so as to stop outputting the PWM pulse modulation signal through the logic control module 414, so that the circuit is in a shutdown state, thereby protecting the power supply controller and the whole circuit.
The fault control module includes a pin open-short protection module 4161, and the pin open-short protection module 4161 is respectively connected to each external pin end to perform open-circuit or short-circuit detection on each external pin end, and perform open-circuit or short-circuit protection on the external pin through the logic control module 414 when detecting that there is an open circuit or a short circuit of the external pin. Since the pin open-circuit short-circuit protection module 4161 is respectively connected to each external pin of the power controller, the voltage on each external pin can be detected. By the voltage value of each pin, the connection state of each pin can be judged according to the voltage value of each pin. For example, when a pin is detected to be in a high impedance state, the pin may be in an open state. In the using process, the current detection pin of the power supply controller generally needs to be connected with a current by adopting a resistor, so that the feedback current is sampled by the current sampling resistor Cs, and whether the current detection pin of the power supply controller is in a fault state or not can be obtained by detecting open circuit and short circuit of the Cs resistor 41611, and the power supply controller and the power supply circuit are protected.
Further, in one embodiment of the present invention, the fault protection module 416 further comprises: one or more of an over-current protection module, a short-circuit protection module 4164, an over-temperature protection module 4163, and an over-voltage and under-voltage protection module 4162. Various faults generated by the power circuit may be detected by the fault protection module 416, and when a fault occurs, the PWM signal may be controlled by the logic control module 414 by outputting a fault detection signal to the logic control module 414. For example, the power supply controller IC has an over-temperature protection function integrated therein. When the internal temperature of the power supply controller reaches 150 ℃, the thermal protection circuit acts, and the chip of the power supply controller stops working; the power controller chip modules can only resume operation when the junction temperature is below 135 degrees.
Referring to fig. 2, in an embodiment of the present invention, the high-efficiency, high-integration and high-reliability power supply controller further includes: the load current detection module 411, the current error detection module and the current precision calibration module 413 are connected, and the load current detection module 411 is connected with a current detection end and used for detecting the current amount when the power circuit load is loaded; as shown in fig. 1 and 2, the load current detection module 411 is connected to the current detection terminal to detect the feedback current amount information of the circuit, as shown in fig. 1, a resistor R32 is disposed between the MOS transistor 70 and the reference ground to feed the current amount of the primary coil back to the load current detection module 411, and the load current detection module 411 can obtain the current amount of the output terminal when the power circuit is loaded with a load through the current function proportional relationship between the primary coil and the secondary coil of the transformer 20.
The current error detection module is connected with the on-load current detection module 411 to compare and output the detected current amount with a current reference value; the current precision calibration module 413 db is connected to the current error detection module and logic control module 414, so as to adjust the output precision constant current PWM pulse width according to the current error output value. The feedback current amount is compared with a reference value and output through the current error detection module, so that the feedback current amount error is output to the current precision calibration module 413, and after the current output by the constant current is calibrated through the current precision calibration module 413, the constant current PWM pulse width of the output precision is adjusted. The output current of the power supply circuit is high-precision constant current output, and the output constant current precision is higher than +/-3%.
Referring to fig. 2, in an embodiment of the present invention, the high-efficiency, high-integration and high-reliability power supply controller further includes: the voltage error detection module 407 is connected with the voltage feedback end to compare and output the feedback voltage quantity with a voltage reference value; the voltage precision calibration module 408 is respectively connected to the voltage error detection module 407 and the logic control module 414 to adjust the output precision constant voltage PWM pulse width according to the voltage error output value. The feedback voltage amount is compared with the reference value by the voltage error detection module 407 and outputted to the voltage precision calibration module 408, and after the voltage calibration of the constant voltage output is performed by the voltage precision calibration module 408408, the output precision constant voltage PWM pulse width is adjusted. The output voltage of the power supply circuit is high-precision constant-voltage output, and the precision of the output constant voltage is more than or equal to 1 percent.
Referring to fig. 2, in an embodiment of the present invention, the high-efficiency, high-integration and high-reliability power supply controller further includes: the system comprises a valley bottom detection module 418, a line compensation module 409 and a soft drive module 415, wherein the valley bottom detection module 418 is connected with a voltage detection end to detect valley voltage of feedback power supply voltage; through built-in bottom of valley detection module 418 module, whether the detectable driven MOS switch tube goes up the galvanic voltage and is in the bottom of the valley state to when the bottom of the valley state, switch on the operation with the MOS switch tube, so make the little efficient of loss of MOS switch tube.
The line compensation module 409 is respectively connected with the valley detection module 418 and the logic control module 414 to compensate and output the difference between the input line voltage and the inductance of the transformer 20; the line compensation module 409 compensates for the difference between the input line voltage and the inductance of the transformer 20, thus ensuring the stability of the power supply voltage.
The soft driving module 415 is respectively connected to the logic control module 414 and the power transistor/MOS transistor, so as to soft drive the power transistor/MOS transistor with the valley detection voltage. The soft driving module 415 provides driving current for the external MOS, and the soft starting module reduces surge current, so that the output voltage slowly rises, and the influence on the input power supply is reduced. Improved EMI performance/less electromagnetic interference.
Referring to fig. 2, in an embodiment of the present invention, the high-efficiency, high-integration and high-reliability power supply controller further includes: the constant current control module 404 is connected with the logic control module 414 so as to output a constant current PWM pulse control signal through the logic control module 414; the constant voltage control module 405 is connected to the logic control module 414 to output a constant voltage PWM pulse control signal through the logic control module 414; the constant power control module 406 is connected to the logic control module 414 to output a constant power PWM pulse control signal through the logic control module 414; the working mode detection module 403 is respectively connected to the constant current control module 404, the constant voltage control module 405, the constant power control module 406, and the working mode control end, so as to collect the setting of the working mode control end, and select one of the constant current control module 404, the constant voltage control module 405, and the constant power control module 406 to control the output of the PWM pulse signal. As shown in fig. 1, the operation mode control module determines the operation mode by detecting the impedance of the configuration capacitor C13 by connecting the configuration capacitor C13 between the operation mode control terminal and the reference ground. For example, the constant current control module 404, the constant voltage control module 405, or the constant power control module 406 are configured to operate so that the power circuit is in a constant current, constant voltage, or constant power mode of operation.
Referring to fig. 1 and 2, the high-efficiency, high-integration and high-reliability power supply controller further includes: the high-voltage starting module is connected with a power supply end and/or a high-voltage power supply end so as to convert a high-voltage input power supply into a power supply of the controller; the high-voltage starting module can convert the input high-voltage direct current into a power supply VCC of the power supply controller when the power supply controller starts to work and supply power to the power supply controller. After the power controller is started, the high-voltage starting module is closed, and the auxiliary coil of the transformer 2020 supplies power. In addition, a starting power supply voltage can be introduced through a collector terminal of the power tube and is respectively pressed through internal resistors to serve as the starting power supply voltage, so that the external resistor of the starting circuit is reduced.
The chip power supply generation module is connected with the high-voltage starting module so as to convert the wide-range input power into the power supply of the controller. The power supply controller is supplied with power voltage through the chip power supply generation module, and when the secondary output voltage is 0V, the power supply controller IC supplies power to the built-in high-voltage starting module 401 in a switching mode. The power supply controller IC is designed to have VCC power supply range of 5-50V, so as to ensure that the output constant current voltage of the power supply is in CV wide range.
Referring to fig. 1, in another aspect, an embodiment of the present invention further provides a high-efficiency, high-integration and high-reliability power circuit, including: the high-efficiency high-integration high-reliability power supply controller comprises an alternating current-direct current conversion circuit 10, a transformer 20, a power transistor, an output filter circuit 30, a primary voltage feedback circuit 50 and a primary current feedback circuit 60, wherein the alternating current-direct current conversion circuit 10 and the alternating current-direct current conversion circuit 10 are connected with one end of a primary coil of the transformer 20 to convert alternating current of commercial power into a first direct current power supply.
One end of the primary coil of the transformer 20 is connected to the first direct current power supply output terminal.
The collector of the power transistor 70 is connected to the other end of the primary winding of the transformer 20.
The pulse output end of the high-efficiency high-integration high-reliability power supply controller is connected with the controlled end of the power transistor.
The output filter circuit 30 is connected to the secondary winding of the transformer 20 to stabilize the voltage of the power output from the secondary winding of the transformer 20 and output a second dc power.
The primary voltage feedback circuit 50 is respectively connected with the auxiliary power supply end of the transformer 20 to feedback the auxiliary power supply voltage of the transformer 20 to the high-efficiency high-integration high-reliability power supply controller, so that the width of pulse modulation is controlled by the high-efficiency high-integration high-reliability power supply controller, and the second direct-current power supply is output in a constant voltage mode; the primary current feedback circuit 60 is connected to the emitter of the power transistor and the reference ground, respectively, to control the width of the pulse modulation by the high-efficiency, high-integration, and high-reliability power supply controller, so that the second dc power supply is output as a constant current.
The high-efficiency high-integration high-reliability power supply circuit provided by the embodiment of the invention has the advantages that the power supply controller detects the voltage value of the input power supply voltage in real time in the working process of the power supply controller and adjusts the working PWM pulse frequency in real time according to the input power supply voltage, so that the whole power supply circuit can always work in an optimal state, and the working efficiency of the power supply circuit is improved.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A high efficiency high integration high reliability power supply controller, comprising:
the high-low voltage detection and identification module is connected with a high-voltage power supply end to acquire a voltage value of an input power supply;
and the logic control module is connected with the high-low voltage detection and identification module so as to adjust the output PWM pulse frequency according to the voltage value of the input power supply and drive a power transistor/MOS (metal oxide semiconductor) tube by outputting a PWM pulse signal, and the power transistor/MOS tube modulates the primary current PWM pulse of the transformer on the power circuit.
2. A high efficiency, high integration and high reliability power supply controller according to claim 1, further comprising:
and the green energy-saving working mode identification module is respectively connected with the current detection end and the logic control end so as to reduce the PWM pulse frequency when detecting that the power supply circuit is in an idle state.
3. A high efficiency, high integration and high reliability power supply controller according to claim 1 or 2, further comprising: the fault protection module is connected with the logic control module to output a fault signal to the logic control module;
the fault control module comprises a pin open-circuit short-circuit protection module which is respectively connected with each external pin end so as to carry out open-circuit or short-circuit detection on each external pin end, and when the external pin is detected to be open-circuit or short-circuit, the logic control module carries out open-circuit or short-circuit protection on the external pin.
4. A high efficiency, high integration and high reliability power supply controller according to claim 3, wherein said fault protection module further comprises: the over-current protection module, the short-circuit protection module, the over-temperature protection module and the over-voltage and under-voltage protection module are one or more.
5. A high efficiency, high integration and high reliability power supply controller according to claim 1, further comprising:
the load current detection module is connected with the current detection end and used for detecting the current amount when the power circuit load is loaded;
the current error detection module is connected with the on-load current detection module so as to compare and output the detected current magnitude with a current reference value;
and the current precision calibration module is connected with the current error detection module and the logic control module in decibels so as to adjust the output precision constant current PWM pulse width through a current error output value.
6. A high efficiency, high integration and high reliability power supply controller according to claim 5, further comprising:
the voltage error detection module is connected with the voltage feedback end so as to compare and output the feedback voltage quantity with a voltage reference value;
and the voltage precision calibration module is respectively connected with the voltage error detection module and the logic control module so as to adjust the output precision constant voltage PWM pulse width through a voltage error output value.
7. The high efficiency, high integration and high reliability power supply controller of claim 6, further comprising:
the valley bottom detection module is connected with the voltage detection end so as to detect valley voltage of the feedback power supply voltage;
the line compensation module is respectively connected with the valley bottom detection module and the logic control module so as to compensate and output the difference between the input line voltage and the inductance of the transformer;
and the soft driving module is respectively connected with the logic control module and the power transistor so as to perform soft driving on the power transistor by valley bottom detection voltage.
8. The high efficiency, high integration and high reliability power supply controller of claim 6, further comprising:
the constant current control module is connected with the logic control module so as to output a constant current PWM pulse control signal through the logic control module;
the constant voltage control module is connected with the logic control module and outputs a constant voltage PWM pulse control signal through the logic control module;
the constant power control module is connected with the logic control module so as to output a constant power PWM pulse control signal through the logic control module;
and the working mode detection module is respectively connected with the constant current control module, the constant voltage control module, the constant power control module and the working mode control end so as to collect the setting of the working mode control end and select one of the constant current control module, the constant voltage control module and the constant power control module to control the output of the PWM pulse signal.
9. A high efficiency, high integration and high reliability power supply controller according to claim 1, further comprising:
the high-voltage starting module is connected with a power supply end and/or a high-voltage power supply end so as to convert a high-voltage input power supply into a power supply of the controller;
and the chip power supply generation module is connected with the high-voltage starting module so as to convert a wide-range input power supply into a power supply of the controller.
10. A high efficiency, high integration, high reliability power supply circuit, comprising:
and the alternating current-direct current conversion circuit is connected with one end of the primary coil of the transformer so as to convert the commercial power alternating current into the first direct current power supply.
One end of a primary coil of the transformer is connected with the output end of the first direct current power supply;
the collector of the power transistor/MOS tube is connected with the other end of the primary coil of the transformer;
the high efficiency high integrated high reliability power supply controller of any one of claims 1 to 9, a pulse output terminal of the high efficiency high integrated high reliability power supply controller being connected to a controlled terminal of the power transistor;
the output filter circuit is connected with the secondary coil of the transformer so as to stabilize the voltage of the power supply output by the secondary coil of the transformer and output a second direct-current power supply;
the primary voltage feedback circuit is respectively connected with the power supply end of the auxiliary power supply of the transformer so as to feed back the voltage of the auxiliary power supply of the transformer to the high-efficiency high-integration high-reliability power supply controller, and the width of pulse modulation is controlled by the high-efficiency high-integration high-reliability power supply controller, so that the second direct-current power supply is output in a constant voltage mode;
and the primary current feedback circuit is respectively connected with the emitter of the power transistor and the reference ground so as to control the width of pulse modulation through the high-efficiency high-integration high-reliability power supply controller and enable the second direct-current power supply to output a constant current.
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