CN113258781A - Synchronous rectification drive circuit of flyback converter - Google Patents
Synchronous rectification drive circuit of flyback converter Download PDFInfo
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- CN113258781A CN113258781A CN202110513595.0A CN202110513595A CN113258781A CN 113258781 A CN113258781 A CN 113258781A CN 202110513595 A CN202110513595 A CN 202110513595A CN 113258781 A CN113258781 A CN 113258781A
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 84
- 230000003321 amplification Effects 0.000 claims abstract description 59
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 59
- 238000004804 winding Methods 0.000 claims abstract description 36
- 239000003990 capacitor Substances 0.000 claims abstract description 33
- 230000003071 parasitic effect Effects 0.000 claims abstract description 20
- 239000004065 semiconductor Substances 0.000 claims description 8
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000004075 alteration Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
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- 238000001514 detection method Methods 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
- H02M3/33592—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer having a synchronous rectifier circuit or a synchronous freewheeling circuit at the secondary side of an isolation transformer
-
- 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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- 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 invention relates to a synchronous rectification drive circuit of a flyback converter, which is connected between a power supply and a load and comprises: the flyback converter comprises a flyback converter main circuit and a synchronous rectification drive circuit, wherein the input side and the output side of the flyback converter main circuit are respectively connected with a power supply and a load, the flyback converter main circuit comprises a synchronous rectifier tube and a switching tube, the switching tube is arranged on the input side of the flyback converter, the control end of the switching tube is used for being connected with an external controller, the synchronous rectifier tube is arranged on the output side of the flyback converter, and the synchronous rectifier tube is provided with a parasitic capacitor; the synchronous rectification driving circuit comprises a driving winding, a first current amplification switching unit and a second current amplification switching unit, the driving winding is coupled with the input side of the flyback converter main circuit, one end of each of the first current amplification switching unit and the second current amplification switching unit is connected with the driving winding, and the other end of each of the first current amplification switching unit and the second current amplification switching unit is connected with the control end of the synchronous rectification tube. The efficiency of the flyback converter can be improved through the action of the two current amplification units.
Description
Technical Field
The invention relates to the field of driving circuits, in particular to a synchronous rectification driving circuit of a flyback converter.
Background
With the continuous reduction of the size of modern high-speed super-large-scale integrated circuits and the requirement of continuous reduction of power consumption, the voltage requirement of a power supply is lower and lower, and the output current is higher and higher. In a low-voltage and high-current DC/DC converter, because the adopted rectifier diode can generate larger on-state loss, the traditional diode rectification mode is not suitable for the low-voltage and high-current and high-efficiency converter. Therefore, a flyback converter with synchronous rectification is generated, a power MOSFET with extremely low on-resistance is adopted in the synchronous rectification circuit to replace a rectifier diode and a fly-wheel diode in an original converter output circuit, the on-voltage drop and the on-loss can be greatly reduced, the overall conversion efficiency of the circuit is obviously improved, and the effect is more obvious in the occasions of low voltage and large current.
The existing synchronous rectification driving method can be divided into voltage type driving and current type driving according to the driving type. However, the current mode driving method has large driving additional loss due to the use of a current detection element, is not suitable for high-frequency operation, and has high cost; the voltage-type driving method has a complicated structure, and fails to significantly increase the on/off speed of the synchronous rectifier, and thus fails to improve the efficiency of the flyback converter.
Disclosure of Invention
The invention provides a synchronous rectification driving circuit of a flyback converter, aiming at solving the problem of low efficiency of the existing flyback converter.
The technical scheme adopted by the invention for solving the technical problems is as follows: in a first aspect, a synchronous rectification driving circuit of a flyback converter is provided, which is connected between a power supply and a load, and includes: the flyback converter comprises a flyback converter main circuit and a synchronous rectification drive circuit, wherein the input side and the output side of the flyback converter main circuit are respectively connected with the power supply and the load, the flyback converter main circuit comprises a synchronous rectification tube and a switching tube, the switching tube is arranged on the input side of the flyback converter main circuit, the control end of the switching tube is used for being connected with an external controller, the synchronous rectification tube is arranged on the output side of the flyback converter main circuit, and the synchronous rectification tube is provided with a parasitic capacitor; the synchronous rectification driving circuit comprises a driving winding, a first current amplification switching unit and a second current amplification switching unit, the driving winding is coupled with the input side of the flyback converter main circuit, one end of each of the first current amplification switching unit and the second current amplification switching unit is connected with the driving winding, and the other end of each of the first current amplification switching unit and the second current amplification switching unit is connected with the control end of the synchronous rectification tube; when the switch tube is conducted, the driving winding drives the first current amplification switch unit to be conducted, and the parasitic capacitor discharges under the action of current amplification of the first current amplification switch unit; when the switch tube is cut off, the driving winding drives the second current amplification switch unit to be conducted, and the parasitic capacitor is charged under the action of the current amplified by the second current amplification switch unit.
Furthermore, the main circuit of the flyback converter also comprises an input filter capacitor, a high-frequency transformer, a magnetic reset circuit and an output filter capacitor, the magnetic reset circuit is connected in parallel with the primary side of the high-frequency transformer, the dotted terminal of the primary side of the high-frequency transformer is used for being connected with the anode of the power supply, the synonym end of the primary side of the high-frequency transformer is connected with the output end of a switching tube, the input end of the switching tube is used for being connected with the negative electrode of the power supply, the input filter capacitor is respectively connected with the positive pole of the power supply and the negative pole of the power supply, the synonym end of the secondary side of the high-frequency transformer is used for being connected with one end of the output filter capacitor and the positive pole of the load, the dotted terminal of the secondary side of the high-frequency transformer is used for being connected with the output end of the synchronous rectifier tube, and the input end of the synchronous rectifier tube is used for being connected with the other end of the output filter capacitor and the negative electrode of the load.
Further, the first current amplification switch unit is a first triode, the second current amplification switch unit is a second triode, the synchronous rectification circuit further comprises a current-limiting resistor, the dotted end of the driving winding is connected with the ground, the dotted end of the driving winding is connected with one end of the current-limiting resistor, the base of the first triode and the base of the second triode are connected and then connected with the other end of the current-limiting resistor, the collector of the first triode and the collector of the second triode are connected and then connected with one end of the current-limiting resistor, and the emitter of the first triode and the emitter of the second triode are connected and then connected with the control end of the synchronous rectification tube.
Further, the switch tube is a full-control type power semiconductor device.
Further, the fully-controlled power semiconductor device is a MOSFET.
Furthermore, the MOSFET is an N-type MOS tube, the grid electrode of the MOSFET is used for being connected with an external controller, the source electrode of the MOSFET is grounded, and the drain electrode of the MOSFET is connected with the synonym end of the primary side of the high-frequency transformer.
Furthermore, the synchronous rectifier tube is an N-type MOS tube, a gate of the synchronous rectifier tube is connected to an emitter of the first triode, a source of the synchronous rectifier tube is connected to the other end of the output filter capacitor, and a drain of the synchronous rectifier tube is connected to a dotted terminal of the secondary side of the high-frequency transformer.
Further, the first triode is a PNP triode and the second triode is an NPN triode.
The synchronous rectifier tube is arranged at one end of the output side of the main circuit of the flyback converter, the synchronous rectifier tube is provided with a parasitic capacitor, the synchronous rectifier tube is connected to a synchronous rectifier driving circuit, when the switching tube is conducted, the driving winding drives the first current amplification switching unit to be conducted, and the parasitic capacitor discharges under the action of the current amplified by the first current amplification switching unit; when the switching tube is cut off, the driving winding drives the second current amplification switching unit to be conducted, and the parasitic capacitor is charged under the action of the current amplified by the second current amplification switching unit. Therefore, the on-off speed of the synchronous rectifier tube can be effectively increased through the current amplification effect of the first current amplification switch unit and the second current amplification switch unit, and the efficiency of the flyback converter is improved.
Drawings
The following detailed description of embodiments of the invention will be made with reference to the accompanying drawings and examples, in which:
fig. 1 is an overall circuit schematic diagram of a synchronous rectification driving circuit of a flyback converter according to the present invention.
In the figure: 1. a flyback converter; 11. a flyback converter main circuit; 12. a synchronous rectification drive circuit; 121. a first current amplification switching unit; 122. a second current amplifying switching unit.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
Referring to fig. 1, a flyback converter synchronous rectification driving circuit 1 is provided, which is connected between a power supply and a load, and includes: the flyback converter comprises a flyback converter main circuit 11 and a synchronous rectification drive circuit 12, wherein the input side and the output side of the flyback converter main circuit 11 are respectively connected with a power supply and a load, the flyback converter main circuit 11 comprises a synchronous rectification tube Q2 and a switching tube Q1, the switching tube Q1 is arranged on the input side of the flyback converter main circuit 11, the control end of the switching tube Q1 is used for being connected with an external controller, the synchronous rectification tube Q2 is arranged on the output side of the flyback converter main circuit 11, and the synchronous rectification tube Q2 is provided with a parasitic capacitor Cgs; the synchronous rectification driving circuit 12 includes a driving winding Nd, a first current amplification switching unit 121, and a second current amplification switching unit 122, where the driving winding Nd is coupled to an input side of the flyback converter main circuit 11, one end of each of the first current amplification switching unit 121 and the second current amplification switching unit 122 is connected to the driving winding Nd, and the other end is connected to a control end of the synchronous rectification tube Q2.
Further, when the switching tube Q1 is turned on, the driving winding Nd drives the first current amplifying switching unit 121 to be turned on, and the parasitic capacitor Cgs discharges under the action of the current amplified by the first current amplifying switching unit 121; when the switching tube Q1 is turned off, the driving winding Nd drives the second current amplification switching unit 122 to be turned on, and the parasitic capacitance Cgs is charged by the current amplified by the second current amplification switching unit 122. Alternatively, the external controller may be a PWM controller.
By providing a synchronous rectifier Q2 at one end of the output side of the flyback converter main circuit 11, the synchronous rectifier Q2 has a parasitic capacitance Cgs, and the synchronous rectifier Q2 is connected to a synchronous rectification driving circuit 12, when the switching tube is turned on Q1, the driving winding Nd drives the first current amplification switching unit 121 to be turned on, and the parasitic capacitance Cgs is discharged under the action of the current amplified by the first current amplification switching unit 121; when the switching tube Q1 is turned off, the driving winding Nd drives the second current amplification switching unit 122 to be turned on, and the parasitic capacitance Cgs is charged by the current amplified by the second current amplification switching unit 122. Therefore, the on and off speeds of the synchronous rectifier Q2 can be effectively increased by the current amplification action of the first current amplification switching unit 121 and the second current amplification switching unit 122, and the efficiency of the flyback converter 1 is improved.
In one embodiment, referring to fig. 1, the flyback converter main circuit 11 further includes an input filter capacitor C1, a high frequency transformer T, the magnetic reset circuit is connected in parallel to the primary side of the high-frequency transformer T, the dotted end of the primary side of the high-frequency transformer T is used for being connected with the positive electrode of a power supply, the unlike end of the primary side of the high-frequency transformer T is connected with the output end of the switch tube Q1, the input end of the switch tube Q1 is used for being connected with the negative electrode of the power supply, the input filter capacitor C1 is respectively connected with the positive electrode of the power supply and the negative electrode of the power supply, the unlike end of the secondary side of the high-frequency transformer T is used for being connected with one end of the output filter capacitor C2 and the positive electrode of a load, the dotted end of the secondary side of the high-frequency transformer T is used for being connected with the output end of the synchronous rectifier tube Q2, and the input end of the synchronous rectifier tube Q2 is used for being connected with the other end of the output filter capacitor C2 and the negative electrode of the load.
In a specific embodiment, referring to fig. 1, the first current amplifying switch unit 121 is a first transistor Q3, the second current amplifying switch unit 122 is a second transistor Q4, the synchronous rectification circuit further includes a current limiting resistor R, a dotted terminal of the driving winding Nd is connected to ground, a dotted terminal of the driving winding Nd is connected to one end of the current limiting resistor R, a base of the first transistor Q3 is connected to a base of the second transistor Q4 and then connected to the other end of the current limiting resistor R, a collector of the first transistor Q3 is connected to a collector of the second transistor Q4 and then connected to one end of the current limiting resistor R, and an emitter of the first transistor Q3 is connected to an emitter of the second transistor Q4 and then connected to a control terminal of the synchronous rectification transistor Q2.
Preferably, the switching tube Q1 is a fully-controlled power semiconductor device. The on or off of the semiconductor device itself can be conveniently controlled by using a fully controlled power semiconductor device.
Further, the fully-controlled power semiconductor device is a MOSFET.
Preferably, the MOSFET is an N-type MOS transistor, a gate of the MOSFET is used for connecting to an external controller, a source of the MOSFET is grounded, and a drain of the MOSFET is connected to the synonym terminal of the primary side of the high-frequency transformer TT.
Preferably, the synchronous rectifier Q2 is an N-type MOS transistor, the gate of which is connected to the emitter of the first transistor Q3, the source of the synchronous rectifier Q2 is connected to the other end of the output filter capacitor C2, and the drain of the synchronous rectifier Q2 is connected to the same-name end of the secondary side of the high-frequency transformer T.
Further, the first transistor Q3 is a PNP transistor, and the second transistor Q4 is an NPN transistor.
With continued reference to fig. 1, the flyback converter of the present invention operates as follows:
during the on period of the switching tube Q1, the input voltage is applied to the primary winding, the inductor current increases linearly, and the high frequency transformer T stores the electric energy in the form of magnetic energy in the primary inductor. At the moment, the voltage of the primary side winding is positive, negative and positive, the voltages of the secondary side winding and the driving winding Nd are both negative, negative and positive, the direction of current on the driving winding Nd is from top to bottom, and the voltage of the base electrode of the first triode Q3 is lower than the voltage of the emitter electrode, so that the first triode Q3 is conducted, and the gate-source parasitic capacitor Cgs of the synchronous rectifier tube Q2 discharges; the current amplification of the first transistor Q3 is utilized to increase the discharging speed of the parasitic capacitor Cgs, so as to make the turn-off speed of the synchronous rectifier Q2 faster. This phase ends until the synchronous rectifier Q2 is turned off.
During the off period of the switching tube Q1, the energy stored in the primary side inductor is coupled to the secondary side. At this time, the voltage of the primary winding of the transformer is positive, negative and negative, and the voltage of the secondary winding and the voltage of the driving winding Nd are positive, negative and positive. At this time, the gate voltage of the first transistor Q3 is higher than the emitter voltage, so the first transistor Q3 does not conduct; the collector voltage of the second triode Q4 is greater than the gate voltage and greater than the emitter voltage, the second triode Q4 is turned on, and at this time, the parasitic capacitor Cgs between the gate and the source of the synchronous rectifier Q2 is charged, and the charging speed of the parasitic capacitor Cgs can be increased by utilizing the current amplification effect of the second triode Q4, so that the switching-on speed of the synchronous rectifier Q2 is increased. The synchronous rectifier Q2 is turned on, the transformer releases energy, and the secondary side current linearly decreases. This phase continues until the next cycle begins.
Therefore, the on and off speeds of the synchronous rectifier Q2 can be effectively increased by the current amplification action of the first current amplification switching unit 121 and the second current amplification switching unit 122, and the efficiency of the flyback converter 1 is improved.
It should be understood that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same, and those skilled in the art can modify the technical solutions described in the above embodiments, or make equivalent substitutions for some technical features; and all such modifications and alterations are intended to fall within the scope of the appended claims.
Claims (8)
1. A flyback converter synchronous rectification drive circuit connected between a power supply and a load, comprising:
the input side and the output side of the flyback converter main circuit are respectively connected with the power supply and the load, the flyback converter main circuit comprises a synchronous rectifier tube and a switch tube, the switch tube is arranged on the input side of the flyback converter main circuit, the control end of the switch tube is used for being connected with an external controller, the synchronous rectifier tube is arranged on the output side of the flyback converter main circuit, and the synchronous rectifier tube is provided with a parasitic capacitor;
the synchronous rectification driving circuit comprises a driving winding, a first current amplification switching unit and a second current amplification switching unit, wherein the driving winding is coupled with the input side of the flyback converter main circuit, one end of each of the first current amplification switching unit and the second current amplification switching unit is connected with the driving winding, and the other end of each of the first current amplification switching unit and the second current amplification switching unit is connected with the control end of the synchronous rectification tube;
when the switch tube is conducted, the driving winding drives the first current amplification switch unit to be conducted, and the parasitic capacitor discharges under the action of current amplification of the first current amplification switch unit; when the switch tube is cut off, the driving winding drives the second current amplification switch unit to be conducted, and the parasitic capacitor is charged under the action of the current amplified by the second current amplification switch unit.
2. The flyback converter synchronous rectification drive circuit of claim 1, wherein: the main circuit of the flyback converter also comprises an input filter capacitor, a high-frequency transformer, a magnetic reset circuit and an output filter capacitor, the magnetic reset circuit is connected in parallel with the primary side of the high-frequency transformer, the dotted terminal of the primary side of the high-frequency transformer is used for being connected with the anode of the power supply, the synonym end of the primary side of the high-frequency transformer is connected with the output end of a switching tube, the input end of the switching tube is used for being connected with the negative electrode of the power supply, the input filter capacitor is respectively connected with the positive pole of the power supply and the negative pole of the power supply, the synonym end of the secondary side of the high-frequency transformer is used for being connected with one end of the output filter capacitor and the positive pole of the load, the dotted terminal of the secondary side of the high-frequency transformer is used for being connected with the output end of the synchronous rectifier tube, and the input end of the synchronous rectifier tube is used for being connected with the other end of the output filter capacitor and the negative electrode of the load.
3. The flyback converter synchronous rectification drive circuit of claim 2, wherein: the first current amplification switch unit is a first triode, the second current amplification switch unit is a second triode, the synchronous rectification circuit further comprises a current-limiting resistor, the dotted end of the driving winding is connected with the ground, the dotted end of the driving winding is connected with one end of the current-limiting resistor, the base of the first triode and the base of the second triode are connected and then connected with the other end of the current-limiting resistor, the collector of the first triode and the collector of the second triode are connected and then connected with one end of the current-limiting resistor, and the emitter of the first triode and the emitter of the second triode are connected and then connected with the control end of the synchronous rectification tube.
4. The flyback converter synchronous rectification drive circuit of claim 3, wherein: the switch tube is a full-control power semiconductor device.
5. The flyback converter synchronous rectification drive circuit of claim 4, wherein: the fully-controlled power semiconductor device is an MOSFET.
6. The flyback converter synchronous rectification drive circuit of claim 5, wherein: the MOSFET is an N-type MOS tube, the grid electrode of the MOSFET is used for being connected with an external controller, the source electrode of the MOSFET is grounded, and the drain electrode of the MOSFET is connected with the synonym end of the primary side of the high-frequency transformer.
7. The flyback converter synchronous rectification drive circuit of claim 6, wherein: the synchronous rectifier tube is an N-type MOS tube, the grid electrode of the synchronous rectifier tube is connected with the emitting electrode of the first triode, the source electrode of the synchronous rectifier tube is connected with the other end of the output filter capacitor, and the drain electrode of the synchronous rectifier tube is connected with the same-name end of the secondary side of the high-frequency transformer.
8. The flyback converter synchronous rectification drive circuit of claim 7, wherein: the first triode is a PNP triode, and the second triode is an NPN triode.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110513595.0A CN113258781B (en) | 2021-05-11 | 2021-05-11 | Synchronous rectification driving circuit of flyback converter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110513595.0A CN113258781B (en) | 2021-05-11 | 2021-05-11 | Synchronous rectification driving circuit of flyback converter |
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| CN113258781A true CN113258781A (en) | 2021-08-13 |
| CN113258781B CN113258781B (en) | 2024-02-27 |
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| CN1555127A (en) * | 2003-12-25 | 2004-12-15 | 伊博电源（杭州）有限公司 | Magnetic amplifier auxiliary output circuit of isolation switch power source |
| CN101262177A (en) * | 2008-04-22 | 2008-09-10 | 英飞特电子（杭州）有限公司 | Current control synchronization commutation driving circuit |
| TW200906046A (en) * | 2007-07-26 | 2009-02-01 | Glacialtech Inc | Flyback converter with self-driven synchronous rectifier |
| CN201230285Y (en) * | 2008-04-11 | 2009-04-29 | 官继红 | Driver circuit for synchronous rectifying tube |
| CN102280989A (en) * | 2011-05-31 | 2011-12-14 | 南京航空航天大学 | Adaptive current source drive circuit |
| CN102355147A (en) * | 2011-10-28 | 2012-02-15 | 上海大学 | Digital control device and method for LLC (logical link control) synchronously-rectified resonant converter |
| CN107078645A (en) * | 2014-10-21 | 2017-08-18 | 电力集成公司 | There is the output side controller of handover request at relaxation concussion extreme value |
-
2021
- 2021-05-11 CN CN202110513595.0A patent/CN113258781B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1555127A (en) * | 2003-12-25 | 2004-12-15 | 伊博电源（杭州）有限公司 | Magnetic amplifier auxiliary output circuit of isolation switch power source |
| TW200906046A (en) * | 2007-07-26 | 2009-02-01 | Glacialtech Inc | Flyback converter with self-driven synchronous rectifier |
| CN201230285Y (en) * | 2008-04-11 | 2009-04-29 | 官继红 | Driver circuit for synchronous rectifying tube |
| CN101262177A (en) * | 2008-04-22 | 2008-09-10 | 英飞特电子（杭州）有限公司 | Current control synchronization commutation driving circuit |
| CN102280989A (en) * | 2011-05-31 | 2011-12-14 | 南京航空航天大学 | Adaptive current source drive circuit |
| CN102355147A (en) * | 2011-10-28 | 2012-02-15 | 上海大学 | Digital control device and method for LLC (logical link control) synchronously-rectified resonant converter |
| CN107078645A (en) * | 2014-10-21 | 2017-08-18 | 电力集成公司 | There is the output side controller of handover request at relaxation concussion extreme value |
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| CN113258781B (en) | 2024-02-27 |
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