CN105471231B - A kind of Flyback ac-dc converter circuit and inverse-excitation type electric pressure converter - Google Patents
A kind of Flyback ac-dc converter circuit and inverse-excitation type electric pressure converter Download PDFInfo
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- CN105471231B CN105471231B CN201511031312.XA CN201511031312A CN105471231B CN 105471231 B CN105471231 B CN 105471231B CN 201511031312 A CN201511031312 A CN 201511031312A CN 105471231 B CN105471231 B CN 105471231B
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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
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
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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
- 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
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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)
- Dc-Dc Converters (AREA)
- Rectifiers (AREA)
Abstract
The present invention is suitable for integrated circuit fields, provides a kind of Flyback ac-dc converter circuit and inverse-excitation type electric pressure converter, comprising: sampling resistor, source while power tube, coil, it is secondary while power tube, input capacitance, output capacitance, resistance and diode；Source side control unit, according to detection voltage voltage input side power tube shutdown, output conversion voltage；Voltage sampling unit samples output voltage；Secondary side control unit generates the conducting that switch frequency signal controls secondary side power tube according to sampled voltage, completes voltage conversion.The present invention obtains detection voltage by sampling resistor, and according to detection voltage voltage input side power tube shutdown output DC voltage, again by it is secondary while voltage sampling unit unlatching source is sampled to output voltage while power tube, loop cycle completes voltage conversion, without optocoupler or source side auxiliary winding feedback, reduce costs and stand-by power consumption.
Description
Technical field
The invention belongs to field of power supplies more particularly to a kind of Flyback ac-dc converter circuit and inverse-excitation type voltage to convert
Device.
Background technique
Flyback voltage converting circuit, also known as Flyback voltage conversion circuit, the circuit store up during main switch is connected
Energy is deposited, energy is transmitted to load during main switch shutdown, is particularly suitable for small-power, the application demand of multiple-channel output.
Inverse-excitation type AC-DC voltage conversion circuit mainly uses following two control method at present:
1, opto-coupled feedback, but this mode usually requires one optic coupling element of external connection, cost is relatively high；
2, source side is fed back, but this mode usually requires an auxiliary winding and samples to output voltage, and have compared with
High stand-by power consumption.
Summary of the invention
The embodiment of the present invention is designed to provide a kind of Flyback ac-dc converter circuit, it is intended to solve existing flyback
Formula conversion circuit is fed back using optocoupler or source side, leads to problem at high cost, that stand-by power consumption is big.
The embodiments of the present invention are implemented as follows, a kind of Flyback ac-dc converter circuit, and the circuit includes:
Source power tube in power tube, coil, pair；And
Sampling resistor R4 obtains detection voltage for sampling in current sampling port；
Source side control unit is closed for controlling source side power tube when the detection voltage is greater than the first reference voltage
It is disconnected, its secondary inductance is controlled by the coil and carries out voltage conversion output DC output voltage；
Voltage sampling unit generates sampled voltage for sampling to the DC output voltage；
Secondary side control unit controls the secondary side power tube for generating switch frequency signal according to the sampled voltage
Conducting, power tube is connected again when the pair controls the source after the conducting of power tube；
The circuit further include:
Input capacitance Cin, output capacitance Cout, resistance R3 and diode D1；
The Same Name of Ends of coil source side inductance is that the input terminal of the circuit connects AC-input voltage, the coil source
The Same Name of Ends of side inductance is also grounded by the input capacitance Cin, the different name end of coil source side inductance simultaneously with the source
Input terminal in control unit is connected with the input terminal of power tube when the source, the output end of source side control unit with it is described
The control terminal of source side power tube connects, and the source controls single when the output end of power tube is the current sampling port and the source
The test side connection of member, the output end of source side power tube also pass through the sampling resistor R4 ground connection；
The different name end of the coil secondary inductance is that the output end of the circuit exports DC output voltage, the coil pair
The different name end of side inductance also by the output capacitance Cout be grounded, the different name end of the coil secondary inductance also with the voltage
The input terminal of sampling unit connects, and the output end of the voltage sampling unit is connect with the input terminal of the secondary side control unit,
The secondary output end in control unit with it is described secondary while power tube control terminal connect, the input terminal of the secondary side power tube and
One end of the resistance R3 connects, the other end of the resistance R3 simultaneously with the Same Name of Ends of the coil secondary inductance and described two
The cathode of pole pipe D1 connects, and the output end of the anode of the diode D1 and the secondary side power tube is grounded simultaneously.
The another object of the embodiment of the present invention is, provides a kind of including the anti-of above-mentioned Flyback ac-dc converter circuit
Swash formula electric pressure converter.
The embodiment of the present invention obtains detection voltage by the sampling resistor on source side, and according to detection voltage voltage input side power
Pipe shutdown output DC voltage, then it is secondary while voltage sampling unit output voltage is sampled generate voltage input while power tube unlatching
Signal, realize loop cycle complete AC-DC voltage conversion, be not necessarily to optocoupler or source side auxiliary winding feedback, reduce costs and to
Machine power consumption.
Detailed description of the invention
Fig. 1 is the structure chart of Flyback ac-dc converter circuit provided in an embodiment of the present invention；
Fig. 2 is the exemplary circuit structure chart of Flyback ac-dc converter circuit provided in an embodiment of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below
Not constituting a conflict with each other can be combined with each other.
The embodiment of the present invention obtains detection voltage by sampling resistor, and according to detection voltage voltage input side power tube shutdown
Export DC voltage, then by it is secondary while voltage sampling unit unlatching source is sampled to output voltage while power tube, realize that the period is followed
Ring completes the conversion of AC-DC voltage, is not necessarily to optocoupler or source side auxiliary winding feedback, reduces costs and stand-by power consumption.
Fig. 1 shows the structure of Flyback ac-dc converter circuit provided in an embodiment of the present invention, for ease of description,
Only the parts related to the present invention are shown.
As an embodiment of the present invention, which can be applied to a variety of inverse-excitation type voltages turn
In parallel operation, such as AC-DC charger, LED drive control device etc..
The Flyback ac-dc converter circuit includes:
Source power tube M2 in power tube M1, coil T, pair；And
Sampling resistor R4 obtains detection voltage for sampling in current sampling port CS；
Source side control unit 1, for the pass voltage input side power tube M1 when detecting voltage and being greater than the first reference voltage Vref1
It is disconnected, its secondary inductance L1 is controlled by coil T and carries out voltage conversion output DC output voltage Vout；
Voltage sampling unit 3 generates sampled voltage Vsence for sampling to DC output voltage Vout；
Secondary side control unit 2 controls secondary side power tube for generating switch frequency signal Tsw according to sampled voltage Vsence
The conducting of M2, secondary power tube M1 is connected again when voltage input after the conducting of power tube M2；
The Flyback ac-dc converter circuit further include:
Input capacitance Cin, output capacitance Cout, resistance R3 and diode D1；
The Same Name of Ends of the source coil T side inductance L0 is the input terminal connection exchange input of the Flyback ac-dc converter circuit
Voltage Vin, the Same Name of Ends of the source coil T side inductance L0 also pass through input capacitance Cin and are grounded, the different name end of the source coil T side inductance L0
Simultaneously at input terminal and the source of control unit 1, the input terminal of power tube M1 connect with source, the output end of source side control unit 1 and
The control terminal of source side power tube M1 connects, source control unit 1 when the output end of power tube M1 is current sampling port CS and source
Test side connection, the output end of source side power tube M1 also pass through sampling resistor R4 and are grounded；
The different name end of coil T secondary inductance L1 is that the output end of the Flyback ac-dc converter circuit exports direct current output
Voltage Vout, the different name end of coil T secondary inductance L1 also pass through output capacitance Cout and are grounded, the different name of coil T secondary inductance L1
End is also connect with the input terminal of voltage sampling unit 3, the input terminal of the output end of voltage sampling unit 3 and secondary side control unit 2
Connection, the secondary output end in control unit 2 are connect with the control terminal of power tube M2 when pair, the input terminal and electricity of secondary side power tube M2
One end connection of R3 is hindered, the other end of resistance R3 connects with the cathode of the Same Name of Ends of coil T secondary inductance L1 and diode D1 simultaneously
It connects, the anode of diode D1 and the output end of pair side power tube M2 are grounded simultaneously.
As an embodiment of the present invention, source power tube M2 in power tube M1 and pair is N-type metal-oxide-semiconductor, N-type metal-oxide-semiconductor
Drain electrode is the input terminal of source power tube M2 in power tube M1 and pair, and the source electrode of N-type metal-oxide-semiconductor is source function in power tube M1 and pair
The output end of rate pipe M2, the grid of p-type metal-oxide-semiconductor are source power tube M2 control terminal in power tube M1 and pair.
As an embodiment of the present invention, can by source, in control unit 1 and source, power tube M1 is integrated in a chip,
The secondary power tube M2 and resistance R3 in control unit 2, voltage sampling unit 3, pair is integrated in another chip.
In embodiments of the present invention, sampling resistor R4 is sampled in current sampling port CS, obtains detection voltage, and the control of source side is single
The voltage input side power tube M1 when detecting voltage and being greater than the first reference voltage Vref1 of member 1 is turned off, and controls its pair by coil T
Side inductance L1 carries out voltage conversion output DC output voltage Vout, and voltage sampling unit 3 carries out DC output voltage Vout
Sampling, generates sampled voltage Vsence, and secondary side control unit 2 generates switch frequency signal Tsw control according to sampled voltage Vsence
The conducting of pair side power tube M2 is made, secondary power tube M1 is connected again when voltage input after the conducting of power tube M2.
The embodiment of the present invention obtains detection voltage by the sampling resistor on source side, and according to detection voltage voltage input side power
Pipe M1 shutdown, exports DC voltage, then by it is secondary while voltage sampling unit output voltage is sampled generate voltage input while power
The open signal of pipe M1 realizes loop cycle, completes the conversion of AC-DC voltage.
The embodiment of the present invention is not necessarily to optocoupler or source side auxiliary winding feedback, and source side uses constant peak current, to reach control
The purpose of output voltage processed, reduces costs, and very low stand-by power consumption may be implemented.
Fig. 2 shows the exemplary circuit structures of Flyback ac-dc converter circuit provided in an embodiment of the present invention, in order to just
In explanation, only the parts related to the present invention are shown.
As an embodiment of the present invention, which includes:
First voltage source DC1, for providing the first reference voltage Vref1；
Third comparison module 13 is greater than the in detection voltage for will test voltage compared with the first reference voltage Vref1
Comparison signal is exported when one reference voltage Vref1；
First comparison module 11, for the input terminal voltage of source side power tube M1 compared with ground voltage, to be generated logical number
Word signal；
Logic control module 12, for being turned off according to comparison signal and logic digital signal voltage input side power tube M1；
The input terminal of first comparison module 11 is the input terminal of source side control unit 1, the output end of the first comparison module 11
It is connect with the first input end of Logic control module 12, the output end of Logic control module 12 is the output of source side control unit 1
End, the positive input of third comparison module 13 are the test side of source side control unit 1, the reversed input of third comparison module 13
End connect with the anode of first voltage source DC1, and the cathode of first voltage source DC1 is grounded, the output end of third comparison module 13 and
Second input terminal of Logic control module 12 connects.
Preferably, the first comparison module 11 can use comparator, and the reverse input end of comparator is the first comparison module
11 input terminal, the positive input ground connection of comparator, the output end of comparator is the output end of the first comparison module 11.
Preferably, third comparison module 13 is comparator, and the reverse input end of comparator is the anti-of third comparison module 13
To input terminal, the positive input of comparator is the positive input of third comparison module 13, and the output end of comparator is third ratio
Compared with the output end of module 13.
Preferably, Logic control module 12 can be adopted as rest-set flip-flop, and the end S of rest-set flip-flop is Logic control module 12
First input end, the end R of rest-set flip-flop is the second input terminal of Logic control module 12, and the end Q of rest-set flip-flop is logic control
The output end of molding block 12.
As an embodiment of the present invention, which includes:
Resistance R1, resistance R2；
One end of resistance R1 is the input terminal of voltage sampling unit 3, and the other end of resistance R1 is the defeated of voltage sampling unit 3
Outlet is grounded by resistance R2.
As an embodiment of the present invention, which includes:
Current source Iramp, the second voltage source DC2, adder and the second comparison module 21；
The input terminal of current source Iramp connects supply voltage, the output end of current source Iramp and the first input of adder
End connection, the second input terminal of adder are the input terminal of secondary side control unit 2, the output end of adder and the second comparison module
21 first input end connection, the second input terminal of the second comparison module 21 are connect with the anode of the second voltage source DC2, the second electricity
The cathode of potential source DC2 is grounded, and the output end of the second comparison module 21 is the output end of secondary side control unit 2.
Preferably, the second comparison module 21 can use comparator, and the reverse input end of comparator is the second comparison module
21 first input end, the positive input of comparator are the second input terminal of the second comparison module 21, the output end of comparator
For the output end of the second comparison module 21.
In embodiments of the present invention, within the source side power tube M1 opening time, current sampling port CS voltage is detected, detection is worked as
When voltage is greater than the first reference voltage Vref1, source side power tube M1 is turned off, secondary transformer is started to work, to output end DC
Output exports electric current.
Within the source side power tube M1 turn-off time, current source Iramp generates a downward ramp voltage, the ramp voltage
Slope be proportional to DC output voltage, and the ramp voltage is passed through into the sampled voltage Vsence that obtains after adder and sampling
Superposition, generate a feedback signal FB, feedback signal FB compared with the reference voltage Vref that the second voltage source DC2 is provided, when
When feedback voltage FB is less than reference voltage Vref and after secondary inductance L1 electric current has been subjected to zero, the second comparison module 21 generates one
A pulse signal goes to open secondary side power tube M2, which exports when the Same Name of Ends of secondary inductance L1 is connected to secondary by power tube M2
The negative terminal (ground potential) of voltage.
At the end of the turn-on time of secondary side power tube M2, secondary side power tube M2 shutdown, source side inductance L0 can be by source Bian Gong
The drain electrode M1D of rate pipe M1 is pulled to negative pressure, the drain electrode M1D voltage of the input terminal detection source side power tube M1 of the first comparison module, when
When the M1D voltage that drains is less than source side ground potential, a new switch periods are opened, open source side power tube M1.
The another object of the embodiment of the present invention is, provides a kind of including the anti-of above-mentioned Flyback ac-dc converter circuit
Swash formula electric pressure converter.
The embodiment of the present invention obtains detection voltage by the sampling resistor on source side, and according to detection voltage voltage input side power
Pipe M1 shutdown, exports DC voltage, then by it is secondary while voltage sampling unit output voltage is sampled generate voltage input while power
The open signal of pipe M1 realizes loop cycle, completes the conversion of AC-DC voltage.
The embodiment of the present invention is not necessarily to optocoupler or source side auxiliary winding feedback, and source side uses constant peak current, to reach control
The purpose of output voltage processed, reduces costs, and very low stand-by power consumption may be implemented.
The above is merely preferred embodiments of the present invention, be not intended to limit the invention, it is all in spirit of the invention and
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within principle.
Claims (9)
1. a kind of Flyback ac-dc converter circuit, which is characterized in that the circuit includes:
Source power tube in power tube, coil, pair；And
Sampling resistor R4 obtains detection voltage for sampling in current sampling port；
Source side control unit, for controlling power tube shutdown in the source side when the detection voltage is greater than the first reference voltage,
Its secondary inductance, which is controlled, by the coil carries out voltage conversion output DC output voltage；
Voltage sampling unit generates sampled voltage for sampling to the DC output voltage；
Secondary side control unit controls leading for the secondary side power tube for generating switch frequency signal according to the sampled voltage
Logical, power tube is connected again when the pair controls the source after the conducting of power tube；
Pair side control unit includes: current source, the second voltage source, adder and the second comparison module；
The input terminal of the current source connects supply voltage, and the output end of the current source and the first input end of adder connect
Connect, the second input terminal of the adder is the input terminal of the secondary side control unit, the output end of the adder with it is described
The first input end of second comparison module connects, and the second input terminal of second comparison module and the second voltage source are just
Pole connection, the cathode ground connection of the second voltage source, the output end of second comparison module are the secondary side control unit
Output end；
The circuit further include:
Input capacitance Cin, output capacitance Cout, resistance R3 and diode D1；
The Same Name of Ends of coil source side inductance is that the input terminal of the circuit connects AC-input voltage, coil source side electricity
The Same Name of Ends of sense also by the input capacitance Cin be grounded, the coil source while the different name end of inductance simultaneously with the source while control
The input terminal of unit processed is connected with the input terminal of source side power tube, and the source is at output end and the source of control unit
The control terminal of power tube connects, source control unit when the output end of power tube is the current sampling port and the source
Test side connection, the output end of source side power tube also pass through the sampling resistor R4 ground connection；
The different name end of the coil secondary inductance is that the output end of the circuit exports DC output voltage, the coil pair side electricity
The different name end of sense also by the output capacitance Cout be grounded, the different name end of the coil secondary inductance also with the voltage sample
The input terminal of unit connects, and the output end of the voltage sampling unit is connect with the input terminal of the secondary side control unit, described
The secondary output end in control unit with it is described secondary while power tube control terminal connect, the input terminal of the secondary side power tube with it is described
One end of resistance R3 connects, the other end of the resistance R3 while Same Name of Ends and the diode with the coil secondary inductance
The cathode of D1 connects, and the output end of the anode of the diode D1 and the secondary side power tube is grounded simultaneously.
2. circuit as described in claim 1, which is characterized in that source power tube in power tube and the pair is N-type
Metal-oxide-semiconductor, the drain electrode of the N-type metal-oxide-semiconductor are the input terminal of source power tube in power tube and the pair, the N-type metal-oxide-semiconductor
Source electrode be the source while power tube and it is described secondary while power tube output end, the grid of the N-type metal-oxide-semiconductor is the source Bian Gong
Rate pipe and the secondary side power tube control terminal.
3. circuit as described in claim 1, which is characterized in that source side control unit includes:
First voltage source, for providing the first reference voltage；
Third comparison module, for the detection voltage compared with first reference voltage, to be greater than in the detection voltage
Comparison signal is exported when first reference voltage；
First comparison module, for the input terminal voltage of source side power tube compared with ground voltage, to be generated to logic number letter
Number；
Logic control module is turned off for the source side power tube according to comparison signal and the logic Digital Signals；
The input terminal of first comparison module is the input terminal of source side control unit, the output of first comparison module
End is connect with the first input end of the Logic control module, and the output end of the Logic control module is that source side control is single
The output end of member, the positive input of the third comparison module are the test side of source side control unit, the third ratio
Anode compared with the reverse input end of module and the first voltage source connect, and the cathode of the first voltage source is grounded, and described the
The output end of three comparison modules is connect with the second input terminal of the Logic control module.
4. circuit as claimed in claim 3, which is characterized in that first comparison module is comparator, the comparator
Reverse input end is the input terminal of first comparison module, and the positive input of the comparator is grounded, the comparator
Output end is the output end of first comparison module.
5. circuit as claimed in claim 3, which is characterized in that the third comparison module is comparator, the comparator
Reverse input end is the reverse input end of the third comparison module, and the positive input of the comparator is that the third compares mould
The positive input of block, the output end of the comparator are the output end of the third comparison module.
6. circuit as claimed in claim 3, which is characterized in that the Logic control module is rest-set flip-flop, the RS triggering
The end S of device is the first input end of the Logic control module, and the end R of the rest-set flip-flop is the of the Logic control module
Two input terminals, the end Q of the rest-set flip-flop are the output end of the Logic control module.
7. circuit as described in claim 1, which is characterized in that the voltage sampling unit includes:
Resistance R1, resistance R2；
One end of the resistance R1 is the input terminal of the voltage sampling unit, and the other end of the resistance R1 is that the voltage is adopted
The output end of sample unit is grounded by the resistance R2.
8. circuit as described in claim 1, which is characterized in that second comparison module is comparator, the comparator
Reverse input end is the first input end of second comparison module, and the positive input of the comparator compares for described second
Second input terminal of module, the output end of the comparator are the output end of second comparison module.
9. a kind of inverse-excitation type electric pressure converter, which is characterized in that the inverse-excitation type electric pressure converter includes such as claim 1 to 8
Described in any item Flyback ac-dc converter circuits.
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| Application Number | Priority Date | Filing Date | Title |
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| 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 |
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| 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 |
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| CN105471231A CN105471231A (en) | 2016-04-06 |
| CN105471231B true CN105471231B (en) | 2019-03-08 |
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| 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 |
| 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 |
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| CN202713156U (en) * | 2012-05-08 | 2013-01-30 | 成都芯源系统有限公司 | Isolated voltage conversion circuit |
| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9154039B2 (en) * | 2012-09-20 | 2015-10-06 | Dialog Semiconductor Inc. | Switching power converter with secondary-side dynamic load detection and primary-side feedback and control |
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Patent Citations (3)
| 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 |
| 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 |
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