CN113472206A - Self-driven synchronous rectification circuit - Google Patents
Self-driven synchronous rectification circuit Download PDFInfo
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- CN113472206A CN113472206A CN202110568832.3A CN202110568832A CN113472206A CN 113472206 A CN113472206 A CN 113472206A CN 202110568832 A CN202110568832 A CN 202110568832A CN 113472206 A CN113472206 A CN 113472206A
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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
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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
- H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
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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
- H02M1/38—Means for preventing simultaneous conduction of switches
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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
- H02M3/337—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 in push-pull configuration
- H02M3/3376—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 in push-pull configuration with automatic control of output voltage or current
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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)
- Rectifiers (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a self-driven synchronous rectification circuit, which belongs to the technical field of synchronous rectification circuits and is characterized in that a mirror image detection circuit is used for outputting a conducting or stopping signal of a synchronous rectification power circuit to an output end of a push-pull driving circuit, the conducting or stopping signal is amplified by the push-pull driving circuit and then is output to a power amplifying circuit and an interlocking control circuit through a dynamic compensation circuit, the conducting or stopping signal is further amplified by the power amplifying circuit and then is output to the synchronous rectification power circuit, the synchronous rectification power circuit is driven to be further conducted or stopped, and the interlocking control circuit is converted and then is used for controlling the stopping or conducting of another rectification bridge arm. The invention not only can realize the synchronous rectification function of the rectification circuit, but also has very stable and reliable synchronous rectification circuit even if the synchronous rectification circuit works in a larger output current range; compared with the traditional rectifying circuit, the synchronous rectifying circuit has incomparable superiority, so that the reliability, the power consumption and other aspects of the synchronous rectifying circuit are improved in a breakthrough manner, and the efficiency of the switching power supply is effectively improved.
Description
Technical Field
The invention belongs to the technical field of synchronous rectification circuits, and particularly relates to a self-driven synchronous rectification circuit.
Background
With the development of 5G communication technology, the development trend of communication power supply rectifier modules is inevitably toward higher power, larger current and higher efficiency, and the switching loss and conduction voltage drop loss of the power supply rectifier become important factors of power supply power loss. In the conventional secondary rectifier circuit, a schottky diode is the first choice for high-power and high-current application. However, the conduction voltage drop of the high-voltage high-power schottky diode is generally 0.6V-0.7V, and the inherent conduction voltage drop of the schottky diode limits the further improvement of the power supply efficiency. It is not possible to use the schottky diode rectification method.
In order to improve efficiency and reduce loss, the adoption of synchronous rectification technology has become an inevitable means for low-voltage and high-current power modules. The synchronous rectification technology can be roughly divided into a self-driving mode and a driving mode. And the drive of the primary side switching tube is usually coupled with the drive signal of the primary side switching tube, so that the control logic is complex. The invention innovatively adopts a self-driven synchronous rectification technology, not only achieves the purpose of synchronous rectification, reduces the switching loss and the conduction loss of output rectification, but also solves the problem of cross conduction, and enables the efficiency of the synchronous rectification to be up to more than 99%, so that the efficiency of the whole communication rectification module is also up to more than 95%.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides the self-driven synchronous rectification circuit which is reasonable in design, overcomes the defects in the prior art and has a good effect.
In order to achieve the purpose, the invention adopts the following technical scheme:
a self-driven synchronous rectification circuit comprises a filter circuit, a mirror image detection circuit, a push-pull drive circuit, a dynamic compensation circuit, a power amplification circuit, a synchronous rectification power circuit and an interlocking control circuit;
a filter circuit configured to filter the dc bias supply voltage to generate a dc bias supply voltage;
the mirror image detection circuit is configured to sample the conduction voltage of the synchronous rectification power circuit and generate an input voltage signal of the push-pull driving circuit;
a push-pull drive circuit configured to amplify an output voltage signal of the mirror image detection circuit, generating a drive voltage signal;
the dynamic compensation circuit is configured to dynamically compensate the tube voltage drop in the image detection circuit, so that the reliable turn-off function of the synchronous rectification power circuit is realized;
the power amplification circuit is configured to perform power amplification on an output voltage signal of the push-pull driving circuit transmitted by the dynamic compensation circuit to generate a power driving signal required by the synchronous rectification power circuit;
the synchronous rectification power circuit is configured to be used for synchronously rectifying an output signal of the power switch transformer, realizing a rectification function and improving rectification efficiency;
and the interlocking control circuit is configured to be used for generating an interlocking turn-off signal, namely controlling the reliable turn-off of the other rectifying bridge arm when the rectifying bridge arm is switched on.
Preferably, the filter circuit comprises a first capacitor and a second capacitor; one end of the first capacitor and one end of the second capacitor form a common end which is connected to a voltage source Vcc, and the other end of the first capacitor and the other end of the second capacitor form a common termination.
Preferably, the image detection circuit comprises a first resistor, a second resistor, a third diode, a triode pair and a diode pair, one end of the first resistor and one end of the second resistor form a common end and are connected to a voltage source Vcc, the other end of the first resistor is connected to a base electrode and a collector electrode of a left triode of the triode pair, the emitter of the left triode of the triode pair is connected to the anode of the left diode of the diode pair, the emitter of the right triode of the triode pair is connected to the anode of the right diode of the diode pair, the cathode of the left diode of the diode pair is connected to Vpulse _ in, and the cathode of the right diode of the diode pair is connected to Vpulse _ out.
Preferably, the push-pull driving circuit includes a fourth triode and a fifth triode, a collector of the fourth triode is connected to the voltage source Vcc, an emitter of the fourth triode and an emitter of the fifth triode form a common terminal, the common terminal is connected to one end of the third capacitor and an anode of the sixth diode pair, and a collector of the fifth triode is grounded.
Preferably, the dynamic compensation circuit comprises a third capacitor and a sixth diode pair, and the other end of the third capacitor, the cathode of the sixth diode pair and one end of the third resistor, the base of the eighth triode and the base of the ninth triode are connected with a common terminal.
Preferably, the power amplifying circuit includes a fifth resistor, a sixth resistor, an eighth transistor and a ninth transistor, one end of the fifth resistor and one end of the sixth resistor form a common terminal connected to the voltage source Vcc, the other end of the fifth resistor and the other end of the sixth resistor form a common terminal connected to the collector of the eighth transistor, the emitter of the eighth transistor and the emitter of the ninth transistor form a common terminal connected to one end of the eleventh resistor and one end of the twelfth resistor, and the collector of the ninth transistor is grounded.
Preferably, the synchronous rectification power circuit comprises an eleventh resistor, a twelfth resistor, an eleventh power MOS transistor and a twelfth power MOS transistor, wherein the other end of the eleventh resistor is connected to the gate of the eleventh power MOS transistor, the other end of the twelfth resistor is connected to the gate of the twelfth power MOS transistor, a drain of the eleventh power MOS transistor and a drain of the twelfth power MOS transistor form a common terminal and are connected to Vpulse _ in (pulse voltage input), and a source of the eleventh power MOS transistor and a source of the twelfth power MOS transistor form a common terminal and are connected to Vpulse _ out (pulse voltage output).
Preferably, the interlock control circuit includes a third resistor, a fourth resistor and a seventh MOS transistor, the other end of the third resistor and one end of the fourth resistor form a common end, the common end is connected to the gate of the seventh MOS transistor, the drain of the seventh MOS transistor is connected to the Shut _ up (turn-off signal), and the source of the seventh MOS transistor is grounded.
The invention has the following beneficial technical effects:
1. by adopting the mirror image detection technology, weak Uds voltage drop signals of the synchronous rectification power circuit can be accurately acquired, and the influence of parasitic parameters on sampling can be effectively avoided.
2. By adopting the dynamic compensation circuit technology, the reliability of synchronous rectification is ensured, and the damage caused by load short circuit or overcurrent during starting is effectively avoided.
3. And an interlocking control circuit technology is adopted, so that the common problem of two rectifier bridge arms is effectively avoided.
4. The self-driven control technology is adopted, so that the synchronous rectification control is simpler and more reliable, and the control logic is prevented from being more complicated due to the coupling relation between the driving of the synchronous rectification control and the driving signal of the primary side switching tube.
5. The synchronous rectification technology is adopted, the advantages of low conduction voltage drop and soft switching are achieved, and the efficiency of the rectification circuit is effectively improved.
6. The control technology combining self-driving and synchronous rectification is adopted, the switch is driven correctly and timely, the efficiency of the rectification circuit is effectively improved, and the control circuit is simple and reliable.
The invention relates to a novel synchronous rectification circuit and a method, in particular to a synchronous rectification circuit and a method adopting a self-driving technology; the circuit not only can realize the synchronous rectification function of the rectification circuit, but also is very stable and reliable even if the circuit works in a larger output current range; compared with the traditional rectifying circuit, the circuit has incomparable superiority, so that the reliability, the power consumption and other aspects of the synchronous rectifying circuit are improved in a breakthrough manner, and the efficiency of the switching power supply is effectively improved.
Drawings
Fig. 1 is a block circuit diagram of the method of the present invention.
Fig. 2 is a circuit configuration diagram of the method of the present invention.
Detailed Description
The invention is described in further detail below with reference to the following figures and detailed description:
referring to fig. 1, a self-driven synchronous rectification circuit filters an input dc voltage into a relatively pure dc voltage. The synchronous rectification power circuit is connected with the output end of the push-pull driving circuit through the mirror image detection circuit, and is connected with the output end of the push-pull driving circuit through the dynamic compensation circuit.
Referring to fig. 2, a self-driven synchronous rectification circuit mainly includes a filter circuit, a mirror image detection circuit, a push-pull driving circuit, a dynamic compensation circuit, a power amplification circuit, a synchronous rectification power circuit, and an interlock control circuit.
As shown in fig. 2, as for the filter circuit, the filter circuit is constituted by a capacitor C1 and a capacitor C2. By adopting a filtering method combining high and low frequency capacitors, noise waves of the power supply can be effectively filtered, and relatively pure direct current power supply voltage is generated.
As shown in fig. 2, as for the image detection circuit, the image detection circuit is constituted by a resistor R1, a resistor R2, a diode pair V1, and a transistor pair V2. When the synchronous rectification power circuits V11 and V12 follow current in the forward direction, because Uds is less than 0, the image source triode is conducted on the left triode of V2, the right triode is cut off, and high level is output; when the synchronous rectification power circuits V11 and V12 are reversely cut off, because Uds is larger than 0, the image source triode cuts off the left triode of V2, the right triode is conducted, and low level is output. Wherein, the mirror current is (Vc-Vbe)/R1, the Vbe is about 0.7V, and the mirror current is approximate to (Vc-0.7)/R1.
As shown in fig. 2, for the push-pull driving circuit, the push-pull driving circuit is composed of transistors V4 and V5, and plays a role in push-pull driving amplification. The triode V4 is a low-power NPN triode, the triode V5 is a low-power PNP triode, and the triode V5 and the PNP triode are designed by geminate transistors, so that the push-pull driving performance is improved.
As shown in fig. 2, the dynamic compensation circuit includes a diode pair V6 and a capacitor C3. And realizing the dynamic compensation function. When the right triode of the image source triode pair V2 is conducted, the output of the right triode has two node voltage drops to the ground, and the two diode node voltage drops connected in series of the diode pair V6 completely offset the voltage drops, so that the misconduction of a push-pull driving circuit, a power amplifying circuit and a synchronous rectification power circuit can be completely avoided; the capacitor C3 is used for the acceleration function of the conduction instant to counteract the conduction delay problem of the diode pair V6.
As shown in fig. 2, as for the power amplifying circuit, the power amplifying circuit is constituted by transistors V8 and V9, and resistors R5 and R6. The triodes V8 and V9 play a role in push-pull power amplification, wherein the triode V8 adopts a medium-power NPN triode, the triode V9 adopts a medium-power PNP triode, and the triode and the PNP triode are designed by using a pair tube to realize the push-pull power amplification function. The resistors R5 and R6 play a role in limiting current and preventing the triode V8 from being damaged, and the resistors adopt a parallel design and play a role in improving output power.
As shown in fig. 2, for the synchronous rectification power circuit, the synchronous rectification power circuit is composed of power MOS transistors V11 and V12, and resistors R11 and R12, and functions to realize a synchronous rectification function. Wherein V11, V12 adopt the high-power MOS switch tube of low on-resistance, and the on-resistance is as low as a few m omega, and the switching speed is only tens of ns.
The self-driven synchronous rectification circuit designed based on the invention has the output current range as wide as 1 mA-60A, the power consumption of the rectification circuit is about 15W when the power supply 3000W outputs, and the power consumption only accounts for 0.5% of the total output power, so that the power supply efficiency is effectively improved. If a high-voltage high-power Schottky diode is adopted for rectification, the power consumption of the Schottky diode is as high as 45-60W, and the Schottky diode accounts for 1.5-2% of the total output power and is 3-4 times of the circuit.
In summary, the circuit of the invention has the obvious characteristics of low power consumption, high reliability and the like, reduces the circuit power consumption of the rectifying circuit and improves the efficiency of the synchronous rectifying circuit. And it can completely adapt to wide range change of output current, and implement reliable synchronous rectification function in full range.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.
Claims (8)
1. A self-driven synchronous rectification circuit is characterized in that: the device comprises a filter circuit, a mirror image detection circuit, a push-pull drive circuit, a dynamic compensation circuit, a power amplification circuit, a synchronous rectification power circuit and an interlocking control circuit;
a filter circuit configured to filter the dc bias supply voltage to generate a dc bias supply voltage;
the mirror image detection circuit is configured to sample the conduction voltage of the synchronous rectification power circuit and generate an input voltage signal of the push-pull driving circuit;
a push-pull drive circuit configured to amplify an output voltage signal of the mirror image detection circuit, generating a drive voltage signal;
the dynamic compensation circuit is configured to dynamically compensate the tube voltage drop in the image detection circuit, so that the reliable turn-off function of the synchronous rectification power circuit is realized;
the power amplification circuit is configured to perform power amplification on an output voltage signal of the push-pull driving circuit transmitted by the dynamic compensation circuit to generate a power driving signal required by the synchronous rectification power circuit;
the synchronous rectification power circuit is configured to be used for synchronously rectifying an output signal of the power switch transformer, realizing a rectification function and improving rectification efficiency;
and the interlocking control circuit is configured to be used for generating an interlocking turn-off signal, namely controlling the reliable turn-off of the other rectifying bridge arm when the rectifying bridge arm is switched on.
2. The self-driven synchronous rectification circuit according to claim 1, wherein: a filter circuit including a first capacitor and a second capacitor; one end of the first capacitor and one end of the second capacitor form a common end connected to a voltage source Vcc, and the other end of the first capacitor and the other end of the second capacitor form a common end grounded.
3. The self-driven synchronous rectification circuit according to claim 1, wherein: the mirror image detection circuit comprises a first resistor, a second resistor, a third diode, a triode pair and a diode pair, wherein one end of the first resistor and one end of the second resistor form a common end and are connected to a voltage source Vcc, the other end of the first resistor is connected to a base electrode and a collector electrode of a left triode of the triode pair, the emitter of the left triode of the triode pair is connected to the anode of the left diode of the diode pair, the emitter of the right triode of the triode pair is connected to the anode of the right diode of the diode pair, the cathode of the left diode of the diode pair is connected to Vpulse _ in, and the cathode of the right diode of the diode pair is connected to Vpulse _ out.
4. The self-driven synchronous rectification circuit according to claim 1, wherein: the push-pull driving circuit comprises a fourth triode and a fifth triode, wherein a collector of the fourth triode is connected to a voltage source Vcc, an emitter of the fourth triode and an emitter of the fifth triode form a common end which is connected to one end of a third capacitor and an anode of a sixth diode pair, and a collector of the fifth triode is grounded.
5. The self-driven synchronous rectification circuit according to claim 1, wherein: and the dynamic compensation circuit comprises a third capacitor and a sixth diode pair, wherein the other end of the third capacitor, the cathode of the sixth diode pair and one end of a third resistor, the base of the eighth triode and the base of the ninth triode are connected with a common end.
6. The self-driven synchronous rectification circuit according to claim 1, wherein: the power amplification circuit comprises a fifth resistor, a sixth resistor, an eighth triode and a ninth triode, wherein a common end is formed by one end of the fifth resistor and one end of the sixth resistor and connected to a voltage source Vcc, a common end is formed by the other end of the fifth resistor and the other end of the sixth resistor and connected to a collector electrode of the eighth triode, a common end is formed by an emitter electrode of the eighth triode and an emitter electrode of the ninth triode and connected to one end of an eleventh resistor and one end of a twelfth resistor, and the collector electrode of the ninth triode is grounded.
7. The self-driven synchronous rectification circuit according to claim 1, wherein: the synchronous rectification power circuit comprises an eleventh resistor, a twelfth resistor, an eleventh power MOS tube and a twelfth power MOS tube, wherein the other end of the eleventh resistor is connected to the grid electrode of the eleventh power MOS tube, the other end of the twelfth resistor is connected to the grid electrode of the twelfth power MOS tube, the common end formed by the drain electrode of the eleventh power MOS tube and the drain electrode of the twelfth power MOS tube is connected to the Vpulse _ in, and the common end formed by the source electrode of the eleventh power MOS tube and the source electrode of the twelfth power MOS tube is connected to the Vpulse _ out.
8. The self-driven synchronous rectification circuit according to claim 1, wherein: the interlocking control circuit comprises a third resistor, a fourth resistor and a seventh MOS tube, wherein the other end of the third resistor and one end of the fourth resistor form a common end which is connected to the grid electrode of the seventh MOS tube, the drain electrode of the seventh MOS tube is connected to the Shut _ up, and the source electrode of the seventh MOS tube is grounded.
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| CN202110568832.3A CN113472206A (en) | 2021-05-25 | 2021-05-25 | Self-driven synchronous rectification circuit |
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| CN202110568832.3A CN113472206A (en) | 2021-05-25 | 2021-05-25 | Self-driven synchronous rectification circuit |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101902136A (en) * | 2009-05-26 | 2010-12-01 | 艾默生网络能源系统北美公司 | Driving device and driving method for synchronous rectifying tube |
| CN104426397A (en) * | 2013-09-03 | 2015-03-18 | 中兴通讯股份有限公司 | Driving device and method for synchronous rectifier tube |
| CN104659751A (en) * | 2013-11-20 | 2015-05-27 | 艾默生网络能源系统北美公司 | Protective circuit of rectifying circuit and power supply |
| CN106849704A (en) * | 2017-03-20 | 2017-06-13 | 广州视源电子科技股份有限公司 | Synchronous rectification interlock circuit |
| CN211720466U (en) * | 2019-12-31 | 2020-10-20 | 深圳职业技术学院 | Synchronous rectification MOS tube driving circuit |
| CN112583238A (en) * | 2020-06-30 | 2021-03-30 | 株洲中车时代电气股份有限公司 | Driving circuit of synchronous rectifier tube |
-
2021
- 2021-05-25 CN CN202110568832.3A patent/CN113472206A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101902136A (en) * | 2009-05-26 | 2010-12-01 | 艾默生网络能源系统北美公司 | Driving device and driving method for synchronous rectifying tube |
| CN104426397A (en) * | 2013-09-03 | 2015-03-18 | 中兴通讯股份有限公司 | Driving device and method for synchronous rectifier tube |
| CN104659751A (en) * | 2013-11-20 | 2015-05-27 | 艾默生网络能源系统北美公司 | Protective circuit of rectifying circuit and power supply |
| CN106849704A (en) * | 2017-03-20 | 2017-06-13 | 广州视源电子科技股份有限公司 | Synchronous rectification interlock circuit |
| CN211720466U (en) * | 2019-12-31 | 2020-10-20 | 深圳职业技术学院 | Synchronous rectification MOS tube driving circuit |
| CN112583238A (en) * | 2020-06-30 | 2021-03-30 | 株洲中车时代电气股份有限公司 | Driving circuit of synchronous rectifier tube |
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