CN105471231A - Flyback AC-DC conversion circuit and flyback voltage converter - Google Patents
Flyback AC-DC conversion circuit and flyback voltage converter Download PDFInfo
- Publication number
- CN105471231A CN105471231A CN201511031312.XA CN201511031312A CN105471231A CN 105471231 A CN105471231 A CN 105471231A CN 201511031312 A CN201511031312 A CN 201511031312A CN 105471231 A CN105471231 A CN 105471231A
- Authority
- CN
- China
- Prior art keywords
- voltage
- output
- input
- source
- power tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
-
- 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
-
- 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
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0006—Arrangements for supplying an adequate voltage to the control circuit of converters
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
- Rectifiers (AREA)
Abstract
The invention is applicable to the field of integrated circuits, and provides a flyback AC-DC conversion circuit and a flyback voltage converter. The flyback AC-DC conversion circuit comprises a sampling resistor, a primary power tube, a coil, a secondary power tube, an input capacitor, an output capacitor, a resistor, a diode, a primary control unit, a voltage sampling unit and a secondary control unit, wherein the primary control unit controls on and off of the primary power tube according to a detection voltage and outputs a conversion voltage; the voltage sampling unit samples the output voltage; the secondary control unit generates a switching frequency signal to control on and off of the secondary power tube according to the sampled voltage and finishes voltage conversion. The flyback AC-DC conversion circuit obtains the detection voltage through the sampling resistor, controls on and off of the primary power tube to output a direct-current voltage according to the detection voltage, samples the output voltage through the voltage sampling unit of a secondary side to start the primary power tube, and finishes the voltage conversion through a periodic cycle; and an optocoupler or a primary side is not needed to assist winding feedback, so that the cost and the stand-by power consumption are reduced.
Description
Technical field
The invention belongs to field of power supplies, particularly relate to a kind of Flyback ac-dc converter circuit and inverse-excitation type electric pressure converter.
Background technology
Flyback voltage converting circuit, also known as Flyback voltage conversion circuit, this circuit, in main switch conduction period storage power, at main switch blocking interval to load transfer energy, is particularly suitable for the application demand of small-power, multiple-channel output.
Current inverse-excitation type AC-DC voltage conversion circuit mainly adopts two kinds of control methods below:
1, opto-coupled feedback, but this mode needs an outside connection optic coupling element usually, and cost compare is high;
2, limit, source feedback, but this mode needs an auxiliary winding to sample to output voltage usually, and have higher stand-by power consumption.
Summary of the invention
The object of the embodiment of the present invention is to provide a kind of Flyback ac-dc converter circuit, is intended to solve existing inverse-excitation type change-over circuit and adopts optocoupler or limit, source feedback, cause the problem that cost is high, stand-by power consumption is large.
The embodiment of the present invention is achieved in that a kind of Flyback ac-dc converter circuit, and described circuit comprises:
Limit, source power tube, coil, secondary power tube; And
Sampling resistor R4, in the sampling of current sample end, obtains and detects voltage;
Limit, source control unit, turns off for controlling limit, described source power tube when described detection voltage is greater than the first reference voltage, controls its secondary inductance carry out voltage transitions output VD by described coil;
Voltage sampling unit, for sampling to described VD, generates sampled voltage;
Secondary control unit, for generating according to described sampled voltage the conducting that switch frequency signal controls described secondary power tube, controls the conducting again of limit, described source power tube after the conducting of described secondary power tube;
Described circuit also comprises:
Input capacitance Cin, output capacitance Cout, resistance R3 and diode D1;
The Same Name of Ends of limit, described coil source inductance is the input connection AC-input voltage of described circuit, the Same Name of Ends of limit, described coil source inductance is also by described input capacitance Cin ground connection, the different name end of limit, described coil source inductance is connected with the input of limit, described source control unit and the input of limit, described source power tube simultaneously, the output of limit, described source control unit is connected with the control end of limit, described source power tube, the output of limit, described source power tube is that described current sample end is connected with the test side of limit, described source control unit, the output of limit, described source power tube is also by described sampling resistor R4 ground connection,
The different name end of described coil secondary inductance is the output output VD of described circuit, the different name end of described coil secondary inductance is also by described output capacitance Cout ground connection, the different name end of described coil secondary inductance is also connected with the input of described voltage sampling unit, the output of described voltage sampling unit is connected with the input of described secondary control unit, the output of described secondary control unit is connected with the control end of described secondary power tube, the input of described secondary power tube is connected with one end of described resistance R3, the other end of described resistance R3 is connected with the Same Name of Ends of described coil secondary inductance and the negative electrode of described diode D1 simultaneously, the anode of described diode D1 and the output of described secondary power tube ground connection simultaneously.
Another object of the embodiment of the present invention is, provides a kind of inverse-excitation type electric pressure converter comprising above-mentioned Flyback ac-dc converter circuit.
The embodiment of the present invention is obtained by the sampling resistor on limit, source and detects voltage, and turn off output dc voltage according to detection limit, voltage control source power tube, the voltage sampling unit of secondary generates the start signal of limit, control source power tube to output voltage sampling again, circulated performance period AC-DC voltage transitions, without the need to optocoupler or limit, source auxiliary winding feedback, reduce cost and stand-by power consumption.
Accompanying drawing explanation
The structure chart of the Flyback ac-dc converter circuit that Fig. 1 provides for the embodiment of the present invention;
The exemplary circuit structure chart of the Flyback ac-dc converter circuit that Fig. 2 provides for the embodiment of the present invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.In addition, if below in described each execution mode of the present invention involved technical characteristic do not form conflict each other and just can mutually combine.
The embodiment of the present invention is obtained by sampling resistor and detects voltage, and turn off output dc voltage according to detection limit, voltage control source power tube, pass through the voltage sampling unit of secondary again to output voltage sampling limit, unlatching source power tube, circulated performance period AC-DC voltage transitions, without the need to optocoupler or limit, source auxiliary winding feedback, reduce cost and stand-by power consumption.
Fig. 1 shows the structure of the Flyback ac-dc converter circuit that the embodiment of the present invention provides, and for convenience of explanation, illustrate only part related to the present invention.
As one embodiment of the invention, this Flyback ac-dc converter circuit can be applied in multiple inverse-excitation type electric pressure converter, such as AC-DC charger, LED driving governor etc.
This Flyback ac-dc converter circuit comprises:
Limit, source power tube M1, coil T, secondary power tube M2; And
Sampling resistor R4, for sampling at current sample end CS, obtaining and detecting voltage;
Limit, source control unit 1, turns off for controlling limit, source power tube M1 when detection voltage is greater than the first reference voltage V ref1, controls its secondary inductance L1 carry out voltage transitions output VD Vout by coil T;
Voltage sampling unit 3, for sampling to VD Vout, generates sampled voltage Vsence;
Secondary control unit 2, for generating according to sampled voltage Vsence the conducting that switch frequency signal Tsw controls secondary power tube M2, controls limit, source power tube M1 conducting again after the conducting of secondary power tube M2;
This Flyback ac-dc converter circuit also comprises:
Input capacitance Cin, output capacitance Cout, resistance R3 and diode D1;
The Same Name of Ends of limit, coil T source inductance L 0 is the input connection AC-input voltage Vin of this Flyback ac-dc converter circuit, the Same Name of Ends of limit, coil T source inductance L 0 is also by input capacitance Cin ground connection, the different name end of limit, coil T source inductance L 0 is connected with the input of limit, source control unit 1 and the input of limit, source power tube M1 simultaneously, the output of limit, source control unit 1 is connected with the control end of limit, source power tube M1, the output of limit, source power tube M1 is that current sample end CS is connected with the test side of limit, source control unit 1, the output of limit, source power tube M1 is also by sampling resistor R4 ground connection,
The different name end of coil T secondary inductance L1 is the output output VD Vout of this Flyback ac-dc converter circuit, the different name end of coil T secondary inductance L1 is also by output capacitance Cout ground connection, the different name end of coil T secondary inductance L1 is also connected with the input of voltage sampling unit 3, the output of voltage sampling unit 3 is connected with the input of secondary control unit 2, the output of secondary control unit 2 is connected with the control end of secondary power tube M2, the input of secondary power tube M2 is connected with one end of resistance R3, the other end of resistance R3 is connected with the Same Name of Ends of coil T secondary inductance L1 and the negative electrode of diode D1 simultaneously, the anode of diode D1 and the output of secondary power tube M2 ground connection simultaneously.
As one embodiment of the invention, limit, source power tube M1 and secondary power tube M2 is N-type metal-oxide-semiconductor, the drain electrode of N-type metal-oxide-semiconductor is the input of limit, source power tube M1 and secondary power tube M2, the source electrode of N-type metal-oxide-semiconductor is the output of limit, source power tube M1 and secondary power tube M2, and the grid of P type metal-oxide-semiconductor is limit, source power tube M1 and secondary power tube M2 control end.
As one embodiment of the invention, can limit, source control unit 1 and limit, source power tube M1 be integrated in a chip, secondary control unit 2, voltage sampling unit 3, secondary power tube M2 and resistance R3 are integrated in another chip.
In embodiments of the present invention, sampling resistor R4 samples at current sample end CS, obtain and detect voltage, limit, source control unit 1 controls limit, source power tube M1 when detection voltage is greater than the first reference voltage V ref1 and turns off, and by coil T control its secondary inductance L1 carry out voltage transitions export VD Vout, voltage sampling unit 3 couples of VD Vout sample, generate sampled voltage Vsence, secondary control unit 2, the conducting that switch frequency signal Tsw controls secondary power tube M2 is generated according to sampled voltage Vsence, limit, source power tube M1 conducting is again controlled after the conducting of secondary power tube M2.
The embodiment of the present invention is obtained by the sampling resistor on limit, source and detects voltage, and turn off according to detection limit, voltage control source power tube M1, output dc voltage, the voltage sampling unit passing through secondary again generates the start signal of limit, control source power tube M1 to output voltage sampling, performance period circulates, and completes AC-DC voltage transitions.
The embodiment of the present invention is without the need to optocoupler or limit, source auxiliary winding feedback, and limit, source adopts constant peak current, to reach the object controlling output voltage, reduces cost, and can realize very low stand-by power consumption.
Fig. 2 shows the exemplary circuit structure of the Flyback ac-dc converter circuit that the embodiment of the present invention provides, and for convenience of explanation, illustrate only part related to the present invention.
As one embodiment of the invention, this limit, source control unit 1 comprises:
First voltage source DC1, for providing the first reference voltage V ref1;
3rd comparison module 13, for being compared with the first reference voltage V ref1 by detection voltage, exports comparison signal when detection voltage is greater than the first reference voltage V ref1;
First comparison module 11, for the input terminal voltage of limit, source power tube M1 is compared with ground voltage, formation logic digital signal;
Logic control module 12, for turning off according to comparison signal and limit, logic Digital Signals source power tube M1;
The input of the first comparison module 11 is the input of limit, source control unit 1, the first input end of the output andlogic control module 12 of the first comparison module 11 connects, the output of Logic control module 12 is the output of limit, source control unit 1, the positive input of the 3rd comparison module 13 is the test side of limit, source control unit 1, the reverse input end of the 3rd comparison module 13 is connected with the positive pole of the first voltage source DC1, the minus earth of the first voltage source DC1, the second input of the output andlogic control module 12 of the 3rd comparison module 13 connects.
Preferably, the first comparison module 11 can adopt comparator, and the reverse input end of comparator is the input of the first comparison module 11, the positive input ground connection of comparator, and the output of comparator is the output of the first comparison module 11.
Preferably, 3rd comparison module 13 is comparator, the reverse input end of comparator is the reverse input end of the 3rd comparison module 13, and the forward of comparator is input as the positive input of the 3rd comparison module 13, and the output of comparator is the output of the 3rd comparison module 13.
Preferably, Logic control module 12 can be adopted as rest-set flip-flop, the S end of rest-set flip-flop is the first input end of Logic control module 12, and the R end of rest-set flip-flop is the second input of Logic control module 12, and the Q end of rest-set flip-flop is the output of Logic control module 12.
As one embodiment of the invention, this voltage sampling unit 3 comprises:
Resistance R1, resistance R2;
One end of resistance R1 is the input of voltage sampling unit 3, and the other end of resistance R1 is that the output of voltage sampling unit 3 is by resistance R2 ground connection.
As one embodiment of the invention, this secondary control unit 2 comprises:
Current source Iramp, the second voltage source DC2, adder and the second comparison module 21;
The input of current source Iramp connects supply voltage, the output of current source Iramp is connected with the first input end of adder, second input of adder is the input of secondary control unit 2, the output of adder is connected with the first input end of the second comparison module 21, second input of the second comparison module 21 is connected with the positive pole of the second voltage source DC2, the minus earth of the second voltage source DC2, the output of the second comparison module 21 is the output of secondary control unit 2.
Preferably, second comparison module 21 can adopt comparator, the reverse input end of comparator is the first input end of the second comparison module 21, and the positive input of comparator is the second input of the second comparison module 21, and the output of comparator is the output of the second comparison module 21.
In embodiments of the present invention, within the power tube M1 opening time of limit, source, detect current sample end CS voltage, when detecting voltage and being greater than the first reference voltage V ref1, turn off limit, source power tube M1, secondary transformer is started working, to output DCOutput output current.
Within the power tube M1 turn-off time of limit, source, current source Iramp produces a downward ramp voltage, the slope of this ramp voltage is proportional to VD, and this ramp voltage is superposed with the sampled voltage Vsence obtained after sampling by adder, produce a feedback signal FB, the reference voltage V ref that this feedback signal FB provides with the second voltage source DC2 compares, when feedback voltage FB is less than reference voltage V ref and secondary inductance L1 electric current after zero passage, second comparison module 21 produces a pulse signal and goes to open secondary power tube M2, the Same Name of Ends of secondary inductance L1 is connected to the negative terminal (earth potential) of secondary output voltage by this secondary power tube M2.
At the end of the ON time of secondary power tube M2, secondary power tube M2 turns off, the drain electrode M1D of limit, source power tube M1 can be pulled to negative pressure by limit, source inductance L 0, the drain electrode M1D voltage of the input detection resources limit power tube M1 of the first comparison module, when the M1D voltage that drains is less than limit, source earth potential, open a new switch periods, open limit, source power tube M1.
Another object of the embodiment of the present invention is, provides a kind of inverse-excitation type electric pressure converter comprising above-mentioned Flyback ac-dc converter circuit.
The embodiment of the present invention is obtained by the sampling resistor on limit, source and detects voltage, and turn off according to detection limit, voltage control source power tube M1, output dc voltage, the voltage sampling unit passing through secondary again generates the start signal of limit, control source power tube M1 to output voltage sampling, performance period circulates, and completes AC-DC voltage transitions.
The embodiment of the present invention is without the need to optocoupler or limit, source auxiliary winding feedback, and limit, source adopts constant peak current, to reach the object controlling output voltage, reduces cost, and can realize very low stand-by power consumption.
These are only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a Flyback ac-dc converter circuit, is characterized in that, described circuit comprises:
Limit, source power tube, coil, secondary power tube; And
Sampling resistor R4, in the sampling of current sample end, obtains and detects voltage;
Limit, source control unit, turns off for controlling limit, described source power tube when described detection voltage is greater than the first reference voltage, controls its secondary inductance carry out voltage transitions output VD by described coil;
Voltage sampling unit, for sampling to described VD, generates sampled voltage;
Secondary control unit, for generating according to described sampled voltage the conducting that switch frequency signal controls described secondary power tube, controls the conducting again of limit, described source power tube after the conducting of described secondary power tube;
Described circuit also comprises:
Input capacitance Cin, output capacitance Cout, resistance R3 and diode D1;
The Same Name of Ends of limit, described coil source inductance is the input connection AC-input voltage of described circuit, the Same Name of Ends of limit, described coil source inductance is also by described input capacitance Cin ground connection, the different name end of limit, described coil source inductance is connected with the input of limit, described source control unit and the input of limit, described source power tube simultaneously, the output of limit, described source control unit is connected with the control end of limit, described source power tube, the output of limit, described source power tube is that described current sample end is connected with the test side of limit, described source control unit, the output of limit, described source power tube is also by described sampling resistor R4 ground connection,
The different name end of described coil secondary inductance is the output output VD of described circuit, the different name end of described coil secondary inductance is also by described output capacitance Cout ground connection, the different name end of described coil secondary inductance is also connected with the input of described voltage sampling unit, the output of described voltage sampling unit is connected with the input of described secondary control unit, the output of described secondary control unit is connected with the control end of described secondary power tube, the input of described secondary power tube is connected with one end of described resistance R3, the other end of described resistance R3 is connected with the Same Name of Ends of described coil secondary inductance and the negative electrode of described diode D1 simultaneously, the anode of described diode D1 and the output of described secondary power tube ground connection simultaneously.
2. circuit as claimed in claim 1, it is characterized in that, described source limit power tube and described secondary power tube are N-type metal-oxide-semiconductor, the drain electrode of described N-type metal-oxide-semiconductor is the input of described source limit power tube and described secondary power tube, the source electrode of described N-type metal-oxide-semiconductor is the output of described source limit power tube and described secondary power tube, and the grid of described N-type metal-oxide-semiconductor is described source limit power tube and described secondary power tube control end.
3. circuit as claimed in claim 1, it is characterized in that, limit, described source control unit comprises:
First voltage source, for providing the first reference voltage;
3rd comparison module, for being compared with described first reference voltage by described detection voltage, exports comparison signal when described detection voltage is greater than described first reference voltage;
First comparison module, for the input terminal voltage of limit, described source power tube is compared with ground voltage, formation logic digital signal;
Logic control module, turns off for limit, source power tube according to comparison signal and described logic Digital Signals;
The input of described first comparison module is the input of limit, described source control unit, the output of described first comparison module is connected with the first input end of described Logic control module, the output of described Logic control module is the output of limit, described source control unit, the positive input of described 3rd comparison module is the test side of limit, described source control unit, the reverse input end of described 3rd comparison module is connected with the positive pole of described first voltage source, the minus earth of described first voltage source, the described output of the 3rd comparison module is connected with the second input of described Logic control module.
4. circuit as claimed in claim 3, it is characterized in that, described first comparison module is comparator, the reverse input end of described comparator is the input of described first comparison module, the positive input ground connection of described comparator, the output of described comparator is the output of described first comparison module.
5. circuit as claimed in claim 3, it is characterized in that, described 3rd comparison module is comparator, the reverse input end of described comparator is the reverse input end of described 3rd comparison module, the forward of described comparator is input as the positive input of described 3rd comparison module, and the output of described comparator is the output of described 3rd comparison module.
6. circuit as claimed in claim 3, it is characterized in that, described Logic control module is rest-set flip-flop, the S end of described rest-set flip-flop is the first input end of described Logic control module, the R end of described rest-set flip-flop is the second input of described Logic control module, and the Q end of described rest-set flip-flop is the output of described Logic control module.
7. circuit as claimed in claim 1, it is characterized in that, described voltage sampling unit comprises:
Resistance R1, resistance R2;
One end of described resistance R1 is the input of described voltage sampling unit, and the other end of described resistance R1 is that the output of described voltage sampling unit is by described resistance R2 ground connection.
8. circuit as claimed in claim 1, it is characterized in that, described secondary control unit comprises:
Current source, the second voltage source, adder and the second comparison module;
The input of described current source connects supply voltage, the output of described current source is connected with the first input end of adder, second input of described adder is the input of described secondary control unit, the output of described adder is connected with the first input end of described second comparison module, second input of described second comparison module is connected with the positive pole of described second voltage source, the minus earth of described second voltage source, the output of described second comparison module is the output of described secondary control unit.
9. circuit as claimed in claim 8, it is characterized in that, described second comparison module is comparator, the reverse input end of described comparator is the first input end of described second comparison module, the positive input of described comparator is the second input of described second comparison module, and the output of described comparator is the output of described second comparison module.
10. an inverse-excitation type electric pressure converter, is characterized in that, described inverse-excitation type electric pressure converter comprises the Flyback ac-dc converter circuit as described in any one of claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511031312.XA CN105471231B (en) | 2015-12-31 | 2015-12-31 | A kind of Flyback ac-dc converter circuit and inverse-excitation type electric pressure converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511031312.XA CN105471231B (en) | 2015-12-31 | 2015-12-31 | A kind of Flyback ac-dc converter circuit and inverse-excitation type electric pressure converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105471231A true CN105471231A (en) | 2016-04-06 |
| CN105471231B CN105471231B (en) | 2019-03-08 |
Family
ID=55608647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511031312.XA Active CN105471231B (en) | 2015-12-31 | 2015-12-31 | A kind of Flyback ac-dc converter circuit and inverse-excitation type electric pressure converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105471231B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107196272A (en) * | 2017-07-07 | 2017-09-22 | 成都启臣微电子股份有限公司 | A kind of continuous protection device of Switching Power Supply armature winding peak point current depth |
| CN110391733A (en) * | 2019-08-28 | 2019-10-29 | 芯好半导体(成都)有限公司 | A kind of power supply circuit, method of supplying power to and power supply device |
| CN112039316A (en) * | 2020-08-10 | 2020-12-04 | 珠海格力电器股份有限公司 | Primary side feedback type switching power supply circuit, control method and switching power supply |
| CN112952925A (en) * | 2019-11-26 | 2021-06-11 | 康舒科技股份有限公司 | Power supply device with multiple groups of wide-range voltage outputs and control method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202713156U (en) * | 2012-05-08 | 2013-01-30 | 成都芯源系统有限公司 | Isolated voltage conversion circuit |
| US20140078789A1 (en) * | 2012-09-20 | 2014-03-20 | Iwatt Inc. | Switching power converter with secondary-side dynamic load detection and primary-side feedback and control |
| CN103872918A (en) * | 2012-12-11 | 2014-06-18 | 戴乐格半导体公司 | Digital Communication Link Between Secondary Side and Primary Side of Switching Power Converter |
| CN205356129U (en) * | 2015-12-31 | 2016-06-29 | 深圳宝砾微电子有限公司 | Flyback ac - DC converter circuit and sharp formula voltage converter that turns over |
-
2015
- 2015-12-31 CN CN201511031312.XA patent/CN105471231B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202713156U (en) * | 2012-05-08 | 2013-01-30 | 成都芯源系统有限公司 | Isolated voltage conversion circuit |
| US20140078789A1 (en) * | 2012-09-20 | 2014-03-20 | Iwatt Inc. | Switching power converter with secondary-side dynamic load detection and primary-side feedback and control |
| CN103872918A (en) * | 2012-12-11 | 2014-06-18 | 戴乐格半导体公司 | Digital Communication Link Between Secondary Side and Primary Side of Switching Power Converter |
| CN205356129U (en) * | 2015-12-31 | 2016-06-29 | 深圳宝砾微电子有限公司 | Flyback ac - DC converter circuit and sharp formula voltage converter that turns over |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107196272A (en) * | 2017-07-07 | 2017-09-22 | 成都启臣微电子股份有限公司 | A kind of continuous protection device of Switching Power Supply armature winding peak point current depth |
| CN107196272B (en) * | 2017-07-07 | 2018-12-07 | 成都启臣微电子股份有限公司 | A kind of continuous protective device of Switching Power Supply armature winding peak point current depth |
| CN110391733A (en) * | 2019-08-28 | 2019-10-29 | 芯好半导体(成都)有限公司 | A kind of power supply circuit, method of supplying power to and power supply device |
| CN112952925A (en) * | 2019-11-26 | 2021-06-11 | 康舒科技股份有限公司 | Power supply device with multiple groups of wide-range voltage outputs and control method thereof |
| CN112039316A (en) * | 2020-08-10 | 2020-12-04 | 珠海格力电器股份有限公司 | Primary side feedback type switching power supply circuit, control method and switching power supply |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105471231B (en) | 2019-03-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109245569B (en) | Flyback converter and control circuit thereof | |
| US9997988B2 (en) | Zero-crossing detection circuit | |
| CN101552560B (en) | Switch voltage stabilizing circuit and control method thereof | |
| US9882500B2 (en) | Power supply device | |
| CN110212771B (en) | Control module and method for controlling a switching converter | |
| CN103887986B (en) | The control circuit of the time prediction control of flyback power converter | |
| US9667132B2 (en) | Flyback converter | |
| CN102185501B (en) | Adaptive synchronous rectification control circuit | |
| US9525357B2 (en) | Control and drive circuit and method | |
| CN101552570B (en) | Switch voltage stabilizing circuit with frequency limiting function and method | |
| CN102185484A (en) | Switching power supply and control circuit and control method thereof | |
| US9385603B2 (en) | Control method and control circuit for switching power supply | |
| CN101635511A (en) | Switch voltage stabilizing circuit with frequency spectrum shaping function and method | |
| CN108880296A (en) | power conversion system | |
| TW201417488A (en) | AC-DC power converter | |
| CN105375798A (en) | Self-adaptive sampling circuit, primary side feedback constant voltage system and switching power supply system | |
| US20110309682A1 (en) | Switching power supply circuit | |
| CN113726165B (en) | Flyback converter and control method thereof | |
| US20120014149A1 (en) | Power conversion apparatus and method | |
| CN105471231A (en) | Flyback AC-DC conversion circuit and flyback voltage converter | |
| US20170133926A1 (en) | Single-stage ac-to-dc converter | |
| CN108880259B (en) | Secondary side current mode control for converters | |
| CN109067206B (en) | AC-DC power supply and control circuit of synchronous rectifier tube thereof | |
| CN107834875A (en) | A kind of frequency control circuit and its control method and switched mode converter | |
| KR102143254B1 (en) | Pwm controlling apparatus for flyback converter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |