CN105471291B - A kind of inverse-excitation type AC-DC voltage conversion circuits and inverse-excitation type electric pressure converter - Google Patents
A kind of inverse-excitation type AC-DC voltage conversion circuits and inverse-excitation type electric pressure converter Download PDFInfo
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- CN105471291B CN105471291B CN201511032395.4A CN201511032395A CN105471291B CN 105471291 B CN105471291 B CN 105471291B CN 201511032395 A CN201511032395 A CN 201511032395A CN 105471291 B CN105471291 B CN 105471291B
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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
- H02M1/0048—Circuits or arrangements for reducing losses
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The present invention is suitable for integrated circuit fields, provides a kind of inverse-excitation type AC D/C voltages conversion circuit and inverse-excitation type electric pressure converter, including：Source power tube, input capacitance, output capacitance, resistance and diode in power tube, coil, pair；Source side control unit generates the power tube conducting of fixed turn-on time signal voltage input side, generates the power tube shutdown of pulse period signal voltage input side, and carry out voltage conversion by secondary inductance；Voltage sampling unit samples output voltage；Secondary side control unit generates the conducting of the secondary side power tube of switch frequency signal control according to sampled voltage, and then voltage input side power tube is connected again.The present invention by it is secondary while voltage sampling unit sample generation source while power tube open signal, again by source while source while control unit generate the cut-off signals of voltage input side power tube and realize voltage conversion, without optocoupler, source side auxiliary winding and resistance, cost and stand-by power consumption are reduced, transfer efficiency and heavy duty efficiency are improved.
Description
Technical field
The invention belongs to field of power supplies more particularly to a kind of inverse-excitation type AC-DC voltage conversion circuits and inverse-excitation type voltage to turn
Parallel operation.
Background technology
Flyback voltage converting circuit, also known as Flyback voltage conversion circuits, the circuit store up during main switch is connected
Energy is deposited, energy is transmitted to load during main switch turns off, is particularly suitable for small-power, the application demand of multiple-channel output.
Inverse-excitation type AC-DC voltage conversion circuits mainly use 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 sampled to output voltage, and have compared with
High stand-by power consumption.
Also, existing inverse-excitation type AC-DC voltage conversion circuits need sampling resistor to sample source side electric current, and sample electricity
Resistance will produce power consumption, to reduce transfer efficiency.
Invention content
The embodiment of the present invention is designed to provide a kind of inverse-excitation type AC-DC voltage conversion circuits, it is intended to solve existing anti-
Swash the problem of formula conversion circuit needs sampling resistor to sample source side electric current, reduce transfer efficiency.
The embodiment of the present invention is achieved in that a kind of inverse-excitation type AC-DC voltage conversion circuits, the circuit include：
Source power tube in power tube, coil, pair；And
Source side control unit, for generating fixed turn-on time signal control source side power tube conducting, the source side
One-pulse time signal is generated after power tube conducting, source side power tube turns off at the end of the pulse period signal, and leads to
It crosses the coil and controls its secondary inductance progress voltage conversion output DC output voltage；
Voltage sampling unit generates sampled voltage for being sampled 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 includes：
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 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, the output end ground connection of source side power tube, the source
Output end in control unit is connect with the control terminal of power tube when the source, the control terminal of source side power tube also with it is described
The feedback end of source side control unit connects；
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 is also grounded by the output capacitance Cout, 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 that it includes above-mentioned inverse-excitation type AC-DC voltage conversion circuits to provide a kind of
Inverse-excitation type electric pressure converter.
Power tube while using fixed turn-on time voltage input by source of the embodiment of the present invention, to reach control output voltage
Purpose, and it is secondary while voltage sampling unit output voltage is sampled generate voltage input while power tube open signal, then pass through
Source while source while control unit generate the cut-off signals of voltage input side power tube, and press loop cycle, complete AC-DC voltages and turn
It changes, reduces cost and stand-by power consumption without resistance without optocoupler, source side auxiliary winding, improve transfer efficiency and heavy burden
Carry efficiency.
Description of the drawings
Fig. 1 is the structure chart of inverse-excitation type AC-DC voltage conversion circuits provided in an embodiment of the present invention；
Fig. 2 is the exemplary circuit structure chart of inverse-excitation type AC-DC voltage conversion circuits provided in an embodiment of the present invention.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be 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
It does not constitute a conflict with each other and can be combined with each other.
The embodiment of the present invention by it is secondary while voltage sampling unit sampling generate voltage input while power tube open signal, then
By source while source while control unit generate the cut-off signals of voltage input side power tube, realize the conversion of AC-DC voltages, no light requirement
Coupling, source side auxiliary winding and resistance, reduce cost and stand-by power consumption, improve transfer efficiency and heavy duty efficiency.
Fig. 1 shows the structure of inverse-excitation type AC-DC voltage conversion circuits provided in an embodiment of the present invention, for the ease of saying
Bright, only the parts related to the present invention are shown.
As an embodiment of the present invention, inverse-excitation type AC-DC voltage conversion circuits can be applied to a variety of inverse-excitation type voltages
In converter, such as AC-DC chargers, LED drive control devices etc..
Inverse-excitation type AC-DC voltage conversion circuits include：
Source power tube M2 in power tube M1, coil T, pair；And
Source side control unit 1, for generating the side power tube M1 conductings of fixed turn-on time signal Tc voltage inputs, source side power
One-pulse time signal is generated after pipe M1 conductings, source side power tube M1 is turned off at the end of pulse period signal, and is controlled by coil T
It makes its secondary inductance L1 and carries out voltage conversion output DC output voltage Vout；
Voltage sampling unit 3 generates sampled voltage Vsence for being sampled to DC output voltage Vout；
Secondary side control unit 2, for generating the secondary side power tube of switch frequency signal Tsw controls 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；
Inverse-excitation type AC-DC voltage conversion circuits further include：
Input capacitance Cin, output capacitance Cout, resistance R3 and diode D1；
The Same Name of Ends of the sources coil T side inductance L0 is the input terminal connection input electricity of inverse-excitation type AC-DC voltage conversion circuits
Vin, the Same Name of Ends of the sources coil T side inductance L0 is pressed also to be grounded by input capacitance Cin, the different name end of the sources coil T side inductance L0 is same
Shi Yuyuan is connected in the input terminal of control unit 1 with the input terminal of power tube M1 when source, the output end ground connection of source side power tube M1,
Source is connect in the output end of control unit 1 with the control terminal of power tube M1 when source, source while power tube M1 control terminal also with source while
The feedback end of control unit 1 connects；
The different name end of coil T secondary inductances L1 is that the output end output direct current of inverse-excitation type AC-DC voltage conversion circuits is defeated
Go out voltage Vout, the different name end of coil T secondary inductances L1 is also grounded by output capacitance Cout, and coil T secondary inductances L1's is different
Name end is also connect with the input terminal of voltage sampling unit 3, the input of the output end of voltage sampling unit 3 and secondary side control unit 2
End connection, the secondary output end in control unit 2 with it is secondary while power tube M2 control terminal connect, the input terminal of secondary side power tube M2 and
One end of resistance R3 connects, the other end of resistance R3 while the cathode with the Same Name of Ends and diode D1 of coil T secondary inductances L1
Connection, 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, which is the negative-going pulse signal directly proportional to input voltage vin.
Source power tube M2 in power tube M1 and pair is N-type metal-oxide-semiconductor, and the drain electrode of metal-oxide-semiconductor is source side power tube M1 and pair
The input terminal of side power tube M2, the source electrode of N-type metal-oxide-semiconductor are the output end of source power tube M2 in power tube M1 and pair, N-type MOS
The grid of pipe is source power tube M2 control terminals 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, source power tube M1 when control unit 1 generates fixed turn-on time signal Tc voltage inputs
Conducting generates one-pulse time signal after source side power tube M1 conductings, source side power tube M1 is turned off at the end of pulse period signal,
And its secondary inductance L1 is controlled by coil T and carries out voltage conversion output DC output voltage Vout, voltage sampling unit 3 is to straight
Stream output voltage Vout is sampled, and sampled voltage Vsence is generated, and secondary side control unit 2 is given birth to according to sampled voltage Vsence
At the conducting of switch frequency signal Tsw control pair side power tube M2, secondary power tube M1 when voltage input after the conducting of power tube M2
Again it is connected.
Power tube while using fixed turn-on time voltage input by source of the embodiment of the present invention, to reach control output voltage
Purpose, and it is secondary while voltage sampling unit output voltage is sampled generate voltage input while power tube M1 open signal, then lead to
Cross source while source while control unit generate the cut-off signals of voltage input side power tube M1, and press loop cycle, complete AC-DC voltages
Conversion.
The embodiment of the present invention samples source side without resistance and realizes inverse-excitation type AC-DC without optocoupler, source side auxiliary winding
Voltage is converted, and is reduced cost and stand-by power consumption, is improved transfer efficiency and heavy duty efficiency.
Fig. 2 shows the exemplary circuit structure of inverse-excitation type AC-DC voltage conversion circuits provided in an embodiment of the present invention, in order to
Convenient for explanation, only the parts related to the present invention are shown.
As an embodiment of the present invention, which includes：
Logic control module 12, for generating the side power tube M1 conductings of fixed turn-on time signal Tc voltage inputs；
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；
Turn-on time generation module 13, for generating turn-on time signal Ton, so that Logic control module 12 is according to logic
Digital signal and the fixed turn-on time signal Tc of turn-on time signal Ton adjustment outputs；
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 input terminal of turn-on time generation module 13 are the feedback end of source side control unit 1, the output of turn-on time generation module 13
End is connect with the second input terminal of Logic control module 12.
Preferably, comparator may be used in the first comparison module 11, 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, Logic control module 12 may be used as rest-set flip-flop, and the ends S of rest-set flip-flop are Logic control module 12
First input end, the ends R of rest-set flip-flop are the second input terminal of Logic control module 12, and the ends Q of rest-set flip-flop are 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, voltage source DC, 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 voltage source DC, voltage source DC's
Cathode is grounded, and the output end of the second comparison module 21 is the output end of secondary side control unit 2.
Preferably, comparator may be used in the second comparison module 21, 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, after source side power tube M1 unlatchings, node M 1D generates a pulse period signal, should
Pulse period signal is the negative-going pulse signal directly proportional to the input voltage vin of input terminal AC Input, in the burst length
At the end of signal (rising edge of pulse), source side power tube M1 is turned off, secondary transformer is started to work, to output end DC
Output output currents.
Within the source side power tube M1 turn-off times, 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 is obtained after adder and sampling
Superposition generates a feedback signal FB, and feedback signal FB is compared with the reference voltage V ref that voltage source DC is provided, when feedback electricity
When pressure FB is less than reference voltage V ref and after secondary inductance L1 electric currents have been subjected to zero, the second comparison module 21 generates a pulse
Signal goes to open secondary side power tube M2, pair output voltage when the Same Name of Ends of secondary inductance L1 is connected to secondary by power tube M2
Negative terminal (ground potential).
At the end of the turn-on time of secondary side power tube M2, secondary side power tube M2 shutdowns, source work(when inductance L0 can be by source
The drain electrode M1D of rate pipe M1 is pulled to negative pressure, the drain electrode M1D voltages of the input terminal detection source side power tube M1 of the first comparison module, when
When the M1D voltages that drain are 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 that it includes above-mentioned inverse-excitation type AC-DC voltage conversion circuits to provide a kind of
Inverse-excitation type electric pressure converter.
Power tube while using fixed turn-on time voltage input by source of the embodiment of the present invention, to reach control output voltage
Purpose, and it is secondary while voltage sampling unit output voltage is sampled generate voltage input while power tube M1 open signal, then lead to
Cross source while source while control unit generate the cut-off signals of voltage input side power tube M1, and press loop cycle, complete AC-DC voltages
Conversion.
The embodiment of the present invention samples source side without resistance and realizes inverse-excitation type AC-DC without optocoupler, source side auxiliary winding
Voltage is converted, and is reduced cost and stand-by power consumption, is improved transfer efficiency and heavy duty efficiency.
The above is merely preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
All any modification, equivalent and improvement made by within principle etc., should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of inverse-excitation type AC-DC voltage conversion circuits, which is characterized in that the circuit includes：
Source power tube in power tube, coil, pair；And
Source side control unit, for generating fixed turn-on time signal control source side power tube conducting, source side power
One-pulse time signal is generated after pipe conducting, source side power tube turns off at the end of the pulse period signal, and passes through institute
It states coil and controls its secondary inductance progress voltage conversion output DC output voltage；
Voltage sampling unit generates sampled voltage for being sampled 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；
The circuit further includes：
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 input voltage, coil source side inductance
Same Name of Ends also by the input capacitance Cin be grounded, the coil source while the different name end of inductance simultaneously with the source while control singly
The input terminal of member is connected with the input terminal of source side power tube, the output end ground connection of source side power tube, the source side control
The output end of unit processed is connect with the control terminal of source side power tube, the source while power tube control terminal also with the source while
The feedback end of control unit connects；
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 is also grounded by the output capacitance Cout, 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 connection of resistance R3, the other end of the resistance R3 while the Same Name of Ends with the coil secondary inductance and the diode
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；
Source side control unit includes：
Logic control module, for generating fixed turn-on time signal control source side power tube conducting；
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；
Turn-on time generation module, for generating turn-on time signal, so that the Logic control module is according to the logical number
Word signal and the fixed turn-on time signal of turn-on time signal adjustment output；
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 input terminal of the turn-on time generation module are the feedback end of source side control unit, when the conducting
Between the output end of generation module connect with the second input terminal of the Logic control module.
2. circuit as described in claim 1, which is characterized in that the pulse period signal is directly proportional to the input voltage
Negative-going pulse signal.
3. 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 source side work(
Rate pipe and the secondary side power tube control terminal.
4. circuit as described in claim 1, 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 described in claim 1, which is characterized in that the Logic control module is rest-set flip-flop, the RS triggerings
The ends S of device are the first input end of the Logic control module, and the ends R of the rest-set flip-flop are the of the Logic control module
Two input terminals, the ends Q of the rest-set flip-flop are the output end of the Logic control module.
6. 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.
7. circuit as described in claim 1, which is characterized in that the pair side control unit includes：
Current source, 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 connects with the anode of the voltage source
It connects, the cathode ground connection of the voltage source, the output end of second comparison module is the output end of the secondary side control unit.
8. circuit as claimed in claim 7, 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
Any one of them inverse-excitation type AC-DC voltage conversion circuits.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201511032395.4A CN105471291B (en) | 2015-12-31 | 2015-12-31 | A kind of inverse-excitation type AC-DC voltage conversion circuits and inverse-excitation type electric pressure converter |
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| CN201511032395.4A CN105471291B (en) | 2015-12-31 | 2015-12-31 | A kind of inverse-excitation type AC-DC voltage conversion circuits and inverse-excitation type electric pressure converter |
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| CN105471291B true CN105471291B (en) | 2018-07-20 |
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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 |
| US11476768B2 (en) | 2020-02-19 | 2022-10-18 | Alpha And Omega Semiconductor International Lp | Flyback converter for controlling on time variation |
| TWI761840B (en) * | 2020-05-22 | 2022-04-21 | 加拿大商萬國半導體國際有限合夥公司 | Flyback converter for controlling on-time variation |
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| 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 |
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| CN105471291A (en) | 2016-04-06 |
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