CN206226279U - A kind of circuit of synchronous rectification - Google Patents
A kind of circuit of synchronous rectification Download PDFInfo
- Publication number
- CN206226279U CN206226279U CN201621237424.0U CN201621237424U CN206226279U CN 206226279 U CN206226279 U CN 206226279U CN 201621237424 U CN201621237424 U CN 201621237424U CN 206226279 U CN206226279 U CN 206226279U
- Authority
- CN
- China
- Prior art keywords
- module
- tube
- logic control
- voltage
- electric capacity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
Landscapes
- Dc-Dc Converters (AREA)
Abstract
The utility model discloses a kind of circuit of synchronous rectification, the utility model is mainly realized self-driven by way of charge pump and boost booster circuits are combined；Including rectifying tube, charge pump unit, Logic control module, voltage detection module, oscillator module, PWM generation modules, reference voltage generation module, switching tube, continued flow tube, isolated tube, inductance, electric capacity and sampling resistor.The utility model starting stage stores electric charge by charge pump on electric capacity, when voltage is raised to a certain extent, the booster circuit of boost topological structures is started working, by the treatment of Logic control module etc., rectifying tube is opened, the self-driven of circuit of synchronous rectification is realized.The type of drive that its low voltage charge pump+boost is combined, accelerates the speed charged to electric capacity, reduces the dutycycle of rectification circuit, reduces average conduction voltage drop.
Description
Technical field
The utility model belongs to electronic circuit technology field, is related to a kind of circuit of synchronous rectification.
Background technology
Synchronous rectification（Synchronous Rectification, SR）Using low-voltage power MOS pipe as rectification
Device.Using its relatively low forward voltage drop and the on state resistance of very little, can be very good to reduce the overall power of rectifier module.
Controlled using the grid that the main difficulty of synchronous rectification is its rectifying tube.
The driving of rectifying tube mainly uses PWM mode, and it realizes complex, it is necessary to set up space vector Mathematical Modeling,
The conversion for carrying out complexity is solved.Substantial amounts of logical process is needed on circuit composition, increases technical difficulty and cost.Supplied using outside
It is complex in electrically driven (operated) mode application, and individually charge pump self-powered flowing mode charging rate is slower, is unfavorable for synchronous whole
The popularization of Flow Technique and application.
Utility model content
The purpose of this utility model, aiming above mentioned problem, proposes a kind of new circuit of synchronous rectification, existing to overcome
There is the deficiency of technology.
The technical solution of the utility model：A kind of circuit of synchronous rectification, it include low voltage charge pump module, Boost modules,
Outer connection electric capacity C and rectifying tube M1；
Wherein, low voltage charge pump module is made up of oscillator module, charge pump unit；Boost modules are by the mould of logic control 1
Block, the module of voltage detecting 1, PWM generation modules, reference voltage generation module, switching tube PM1, continued flow tube NM2, isolated tube NM1,
Inductance L and sample resistance R1 and R2 is constituted；
Wherein, the drain electrode of the drain electrode connection rectifying tube M1 of isolated tube NM1, its source electrode connect respectively continued flow tube NM2 source electrode,
Resistance R2 lower ends and the bottom crown of electric capacity C, its grid connect the source electrode of rectifying tube M1 and one end of inductance L respectively；Switching tube PM1
Source electrode difference connection oscillator, the input of outer connection electric capacity C and voltage detection module 2, its drain electrode connection inductance L's is another
End；The top crown of electric capacity C connects the input of voltage detection module 1 and the output end of electric charge pump module, resistance R1 and R2 respectively
The voltage Vf produced after series connection partial pressure produces voltage Vref as the input of PWM module with reference voltage generation module；This is patrolled
The output end for controlling the first input end of 1 module for the module of voltage detecting 1 is collected, the second input of the module of logic control 1 is
PWM module output end, the 3rd input of the module of logic control 1 is the output end of logic control 2；The module of logic control 1
The first output end be connected to the grid of continued flow tube NM2, the second output end is connected to the grid of switching tube, the logic control
The output end of 1 module the 3rd is connected to oscillator；The module input downlink connection electric capacity C top crowns of voltage detecting 2, input downlink connection
The input of logic control 2；The output end of logic control 2 connects the grid of logic control 1 and rectifying tube M1 respectively.
In foregoing circuit of synchronous rectification, the module of the logic control 1 controls switching tube PM1 and the afterflow of Boost modules
Pipe NM2's opens or closes, and the module of the logic control 2 control rectifying tube M1's opens or closes.
In foregoing circuit of synchronous rectification, switching tube PM1 is that p-type mos is managed or PNP bipolar transistors；Continued flow tube NM2 is
N-type mos is managed or NPN bipolar transistor.
In foregoing circuit of synchronous rectification, the rectifying tube M1 is VDMOS or LDMOS.
The beneficial effects of the utility model are：The self-driven side that low voltage charge pump+boost of the present utility model is combined
Formula, it is not necessary to outside extra power supply, while accelerating the speed charged to electric capacity, reduces the dutycycle of rectification circuit, reduces average
Conduction voltage drop, greatly reduces and applies complexity, improves range of application.
Brief description of the drawings
It is configuration diagram of the present utility model shown in Fig. 1.
Specific embodiment
The utility model is described in detail below in conjunction with the accompanying drawings：
As shown in figure 1, a kind of circuit of synchronous rectification, it includes low voltage charge pump module, Boost modules, outer connection electric capacity C
With rectifying tube M1；Wherein the low voltage charge pump module is made up of oscillator module, charge pump unit；Boost modules are by logic control
Make 1 module, the module of voltage detecting 1, PWM generation modules, reference voltage generation module, switching tube PM1, continued flow tube NM2, isolated tube
NM1, inductance L and sample resistance R1 and R2 are constituted；
Wherein, the drain electrode of the drain electrode connection rectifying tube M1 of isolated tube NM1, its source electrode connect respectively continued flow tube NM2 source electrode,
Resistance R2 lower ends and the bottom crown of electric capacity C, its grid connect the source electrode of rectifying tube M1 and one end of inductance L respectively；Switching tube PM1
Source electrode difference connection oscillator, the input of outer connection electric capacity C and voltage detection module 2, its drain electrode connection inductance L's is another
End；The top crown of electric capacity C connects the input of voltage detection module 1 and the output end of electric charge pump module, resistance R1 and R2 respectively
The voltage Vf produced after series connection partial pressure produces voltage Vref as the input of PWM module with reference voltage generation module；This is patrolled
The output end for controlling the first input end of 1 module for the module of voltage detecting 1 is collected, the second input of the module of logic control 1 is
PWM module output end, the 3rd input of the module of logic control 1 is the output end of logic control 2；The module of logic control 1
The first output end be connected to the grid of continued flow tube NM2, the second output end is connected to the grid of switching tube, the logic control
The output end of 1 module the 3rd is connected to oscillator；The module input downlink connection electric capacity C top crowns of voltage detecting 2, input downlink connection
The input of logic control 2；The output end of logic control 2 connects the grid of logic control 1 and rectifying tube M1 respectively.
And the module of logic control 1 control the switching tube PM1 of Boost modules and opening or closing for continued flow tube NM2, the logic
2 modules are controlled to control opening or closing for rectifying tube M1, switching tube PM1 is that p-type mos is managed or PNP bipolar transistors；Continued flow tube NM2
It is N-type mos pipes or NPN bipolar transistor, rectifying tube M1 is VDMOS or LDMOS.
The course of work is as follows：
（1）When the reverse body diode conducting of rectifying tube, low voltage charge pump module are started working, voltage is 0 on electric capacity C, electricity
Lotus pump is gradually increasing the voltage on electric capacity C under the driving of oscillator, carries out low voltage starting, if the working time in this stage is
T1。
（2）When the current potential on electric capacity C reaches the condition of work of Boost modules, the module output control of voltage detecting 1 letter
Number, low voltage charge pump module is closed, while starting Boost modules, continue to be boosted to electric capacity C, the module of voltage detecting 2 detection electric capacity
Magnitude of voltage on C, when magnitude of voltage reaches default higher limit VH on electric capacity, the module of logic control 2 opens rectifying tube, while closing
Boost modules are closed, stops charging electric capacity.If this working time in stage is T2
（3）The stage, Boost modules and low voltage charge pump module from service, the energy of electric capacity C maintain rectifying tube to lead
It is logical, while the voltage on the module of voltage detecting 2 detection electric capacity, when the voltage on electric capacity drops to default lower limit VL, patrols
Control module shut-off rectifying tube is collected, now low voltage charge pump module starts, and charging pressure-boosting is continued to electric capacity.If the work in this stage
Time is T3.
（4）Said process is repeated, is circulated successively, it is the square wave of m that dutycycle is formed between rectifying tube S and D.
If electric current flows through the body diode of rectifying tube, the voltage between its S and D is VF, then average voltage
In sum, the self-powered flowing mode that the circuit of synchronous rectification of this programme is combined using low voltage charge pump+boost,
Outside need not additionally power, while accelerating the speed charged to electric capacity, reduce the dutycycle of rectification circuit, reduce and averagely turn on
Pressure drop, greatly reduces and applies complexity, improves range of application.
The description of such scheme is the invention for being understood that and using for ease of those skilled in the art.It is familiar with
The personnel of art technology obviously can easily make various modifications to embodiment.Therefore, the invention is not restricted to above-mentioned reality
Scheme, those skilled in the art's the method according to the invention, does not depart from improvement that scope made and modification all should
Within protection scope of the present invention.
Claims (4)
1. a kind of circuit of synchronous rectification, it is characterised in that：It includes low voltage charge pump module, Boost modules, outer connection electric capacity C
With rectifying tube M1；
Wherein, low voltage charge pump module is made up of oscillator module, charge pump unit；Boost modules by the module of logic control 1,
The module of voltage detecting 1, PWM generation modules, reference voltage generation module, switching tube PM1, continued flow tube NM2, isolated tube NM1, inductance
L and sample resistance R1 and R2 is constituted；
Wherein, the drain electrode of the drain electrode connection rectifying tube M1 of isolated tube NM1, its source electrode connects the source electrode of continued flow tube NM2, resistance respectively
R2 lower ends and the bottom crown of electric capacity C, its grid connect the source electrode of rectifying tube M1 and one end of inductance L respectively；The source of switching tube PM1
The input of connection oscillator, outer connection electric capacity C and voltage detection module 2 is distinguished in pole, the other end of its drain electrode connection inductance L；
The top crown of electric capacity C connects the input of voltage detection module 1 and the output end of electric charge pump module respectively, and resistance R1 connects with R2
The voltage Vf produced after partial pressure produces voltage Vref as the input of PWM module with reference voltage generation module；The logic control
The first input end for making 1 module is the output end of the module of voltage detecting 1, and the second input of the module of logic control 1 is PWM moulds
Block output end, the 3rd input of the module of logic control 1 is the output end of logic control 2；The first of the module of logic control 1
Output end is connected to the grid of continued flow tube NM2, and the second output end is connected to the grid of switching tube, the module of logic control 1
3rd output end is connected to oscillator；The module input downlink connection electric capacity C top crowns of voltage detecting 2, input downlink connection logic
Control 2 inputs；The output end of logic control 2 connects the grid of logic control 1 and rectifying tube M1 respectively.
2. circuit of synchronous rectification according to claim 1, it is characterised in that the module of the logic control 1 controls Boost moulds
The switching tube PM1 of block and opening or closing for continued flow tube NM2, the module of the logic control 2 control rectifying tube M1's opens or closes.
3. circuit of synchronous rectification according to claim 1, it is characterised in that：Switching tube PM1 is that p-type mos is managed or PNP is bipolar
Transistor npn npn；Continued flow tube NM2 is that N-type mos is managed or NPN bipolar transistor.
4. circuit of synchronous rectification according to claim 1, it is characterised in that：The rectifying tube M1 is VDMOS or LDMOS.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621237424.0U CN206226279U (en) | 2016-11-18 | 2016-11-18 | A kind of circuit of synchronous rectification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621237424.0U CN206226279U (en) | 2016-11-18 | 2016-11-18 | A kind of circuit of synchronous rectification |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206226279U true CN206226279U (en) | 2017-06-06 |
Family
ID=58789816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621237424.0U Withdrawn - After Issue CN206226279U (en) | 2016-11-18 | 2016-11-18 | A kind of circuit of synchronous rectification |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206226279U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106374739A (en) * | 2016-11-18 | 2017-02-01 | 贵州恒芯微电子科技有限公司 | Synchronous rectification circuit |
-
2016
- 2016-11-18 CN CN201621237424.0U patent/CN206226279U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106374739A (en) * | 2016-11-18 | 2017-02-01 | 贵州恒芯微电子科技有限公司 | Synchronous rectification circuit |
| WO2018090558A1 (en) * | 2016-11-18 | 2018-05-24 | 贵州恒芯微电子科技有限公司 | Synchronous rectification circuit |
| CN106374739B (en) * | 2016-11-18 | 2018-07-31 | 贵州恒芯微电子科技有限公司 | A kind of circuit of synchronous rectification |
| US10523129B2 (en) | 2016-11-18 | 2019-12-31 | Guizhou E-Chip Microelectronics Technology Co., Ltd. | Synchronous rectification circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205725436U (en) | Gate driver circuit and include the bridge circuit of gate driver circuit | |
| CN106374739B (en) | A kind of circuit of synchronous rectification | |
| CN102969889A (en) | Self-powered source driving circuit and switching power supply applying same | |
| CN104319983B (en) | A kind of source driving method, drive circuit and Switching Power Supply being used in Switching Power Supply | |
| CN206149142U (en) | Piezoelectricity vibration energy collection system based on maximum power point trails | |
| CN102684462B (en) | Novel low end metal oxide semiconductor field effect transistor (MOSFET)/ insulated gate bipolar transistor (IGBT) negative pressure clamping driving circuit and control method thereof | |
| CN107482903A (en) | A kind of efficient switch capacitive power converter | |
| CN108616224A (en) | A kind of single-phase seven electrical level inverter of booster type | |
| CN206226279U (en) | A kind of circuit of synchronous rectification | |
| CN206472048U (en) | The half-bridge drive circuit that a kind of discrete MOSFET is constituted | |
| CN208112512U (en) | Transducer drive circuit | |
| CN206545724U (en) | A kind of flow instrument valve controling circuit | |
| CN206041848U (en) | Novel topological structure of two contravariant output translators | |
| CN105871232A (en) | Power source control device capable of dynamically adjusting driving ability | |
| CN108199456A (en) | A kind of lithium battery quick-charging circuit and charging method | |
| CN209419302U (en) | A kind of solar controller | |
| CN203748059U (en) | Solar street lamp controller topology circuit | |
| CN209767384U (en) | Voltage regulating circuit of charge pump | |
| CN106329925A (en) | Bidirectional direct-current power converter | |
| CN209642547U (en) | A kind of charge pump conversion circuit | |
| CN209642546U (en) | A kind of reduction voltage circuit | |
| CN106678412A (en) | Valve control circuit for flow instrument and control method of valve control circuit | |
| CN204216837U (en) | A kind of isolated form photovoltaic power generation apparatus | |
| CN109687707A (en) | A kind of reduction voltage circuit | |
| CN112019201B (en) | Gate current regulator of IGBT device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170606 Effective date of abandoning: 20180731 |
|
| AV01 | Patent right actively abandoned |