CN103904620B - A kind of DC supply input counnter attack fills circuit and method - Google Patents
A kind of DC supply input counnter attack fills circuit and method Download PDFInfo
- Publication number
- CN103904620B CN103904620B CN201210583448.1A CN201210583448A CN103904620B CN 103904620 B CN103904620 B CN 103904620B CN 201210583448 A CN201210583448 A CN 201210583448A CN 103904620 B CN103904620 B CN 103904620B
- Authority
- CN
- China
- Prior art keywords
- mosfet
- circuit
- voltage
- reverse
- delay startup
- 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.)
- Active
Links
Landscapes
- Electronic Switches (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a kind of DC supply input counnter attacks to fill circuit and method, including：Reverse-connection preventing circuit, soft-start circuit and sampling control circuit, reverse-connection preventing circuit includes anti-reverse metal oxide semiconductor field effect tube MOSFET, soft-start circuit includes delay startup MOSFET, sampling control circuit samples the voltage between the drain electrode and source electrode of delay startup MOSFET, when voltage between the drain electrode and source electrode of delay startup MOSFET is less than reference voltage, anti-reverse MOSFET shutdowns are controlled.The present invention avoids that current flowing backwards occur when input short or input voltage quickly fall, so as to when DC/DC converters use full-bridge circuit, avoid that converter pair side synchronous rectification MOSFET drain-source voltage stress is caused to increase, damage MOSFET；Also, avoid, when reversed lightning surge occurs for input port, current flowing backwards occur, to avoid module input capacitance power down, caused power supply from exporting power down.
Description
Technical field
The present invention relates to power technique fields more particularly to a kind of DC supply input counnter attack to fill circuit and method.
Background technology
Current powerful direct-current switch power supply substantially uses metal oxide semiconductor field effect tube (MOSFET) real
Existing counnter attack connection function.It is normal in input if Fig. 1 is that currently used MOSFET realizes anti-reverse circuit,
MOSFET is connected, and the conduction impedance very little of MOSFET, and very little is lost, and circuit can work normally；In input reverse-connection,
MOSFET cannot be connected, and effectively prevent circuit reversal connection.
But this circuit, in normal work, if there is input short failure suddenly, input capacitance can pass through input
End carries out repid discharge, causes current flowing backwards.DC/DC (DC to DC) is if converter is electric using full-bridge in this case
Road is likely to result in converter pair side synchronous rectification MOSFET drain-source voltage stress and increases, damages MOSFET；Input side is quick
The heavy current impact that electric discharge generates is also possible to that DC power supply can be damaged.
If making reverse-connection preventing circuit using diode substitution MOSFET, electric current can be prevented when input short failure occurs
It is anti-to fill, but diode is lost too big when large power supply works normally, and can seriously affect the efficiency of large power supply.For solution
Certainly current flowing backwards problem when high-power DC power supply input short failure, it is necessary to the anti-circnit NOTs of MOSFET are improved, or
Person increases additional counnter attack and fills circuit.
Invention content
The technical problem to be solved in the present invention is to provide a kind of DC supply input counnter attacks to fill circuit and method, can prop up
Hold it is anti-reverse have no effect on power-efficient in the case of, prevent current flowing backwards in DC supply input short circuit.
In order to solve the above technical problems, a kind of DC supply input counnter attack of the present invention fills circuit, including：Anti-reverse electricity
Road, soft-start circuit and sampling control circuit, the reverse-connection preventing circuit include anti-reverse metal oxide semiconductor field effect tube
MOSFET, the soft-start circuit include delay startup MOSFET, and the sampling control circuit samples the delay startup MOSFET's
Voltage between drain electrode and source electrode, when the voltage between the drain electrode and source electrode of the delay startup MOSFET is less than reference voltage,
Control the anti-reverse MOSFET shutdowns.
Further, the source electrode of the anti-reverse MOSFET is connect with the source electrode of the delay startup MOSFET, and tie point is made
For publicly, the drain electrode of the delay startup MOSFET is connect with the sampling control circuit.
Further, two-way transient voltage is also parallel between the drain electrode and source electrode of the anti-reverse MOSFET to inhibit
Device TVS.
Further, the sampling control circuit includes bleeder circuit, comparator and control pipe, the bleeder circuit connection
First partial pressure end of the drain electrode to the delay startup MOSFET and the publicly sampled voltage, the bleeder circuit is connected to institute
The inverting input of comparator is stated, the second partial pressure end of the bleeder circuit is connected to the in-phase input end of the comparator, institute
The output end for stating comparator is connected to the input terminal of the control pipe, and the control terminal of the control pipe is connected to described anti-reverse
MOSFET, the comparator is when the drain voltage of the delay startup MOSFET of sampling is less than the voltage publicly of sampling, control
The control pipe turns off the anti-reverse MOSFET.
Further, the inverting input of the comparator with it is described publicly between be also associated in parallel the two or two
Pole pipe and third diode clamp the voltage of the inverting input, and second diode is with respect to third diode negative direction
Connection.
Further, the control pipe uses triode, the input terminal of the base stage of the triode as the control pipe,
Control terminal of the collector and emitter of the triode as the control pipe, the collector of the triode are connected to described
The grid of anti-reverse MOSFET, the emitter of the triode are connected to the source electrode of the anti-reverse MOSFET.
Further, the comparator is less than the electricity publicly of sampling in the drain voltage of the delay startup MOSFET of sampling
When pressure, output HIGH voltage drives the triode ON, drags down the driving of the anti-reverse MOSFET, closes described anti-reverse
MOSFET。
Further, a kind of DC supply input counnter attack irrigation method, including：
The delay startup metal oxide semiconductor field effect tube for including in sampling control circuit sampling soft-start circuit
Voltage between the drain electrode and source electrode of MOSFET；
Voltage of the sampling control circuit between the drain electrode and source electrode of the delay startup MOSFET is less than reference voltage
When, control the anti-reverse MOSFET shutdowns for including in reverse-connection preventing circuit.
Further, further include：
Using the tie point of the source electrode of the anti-reverse MOSFET and the source electrode of the delay startup MOSFET as publicly.
Further, voltage of the sampling control circuit between the drain electrode and source electrode of the delay startup MOSFET is less than
When reference voltage, the anti-reverse MOSFET shutdowns for including in reverse-connection preventing circuit are controlled, including：
The sampling control circuit is less than the voltage publicly of sampling in the drain voltage of the delay startup MOSFET of sampling
When, turn off the anti-reverse MOSFET.
In conclusion the voltage between drain electrode and source electrode of the present invention by sampling delay startup MOS judges input short event
Barrier, and realize the anti-current flowing backwards of DC supply input short circuit by controlling the anti-reverse MOSFET of shutdown, while not influencing to input
Counnter attack connection function, the present invention avoids generation current flowing backwards when input short or input voltage quickly fall, and (i.e. DC power supply is defeated
It is reversed to enter electric current), so as to when DC/DC converters use full-bridge circuit, avoid causing the side synchronous rectification of converter pair
MOSFET drain-source voltage stress increases, and damages MOSFET；Also, it avoids, when reversed lightning surge occurs for input port, going out
Existing current flowing backwards, to avoid module input capacitance power down, caused power supply exports power down, also, circuit of the present invention realizes letter
It is single, it is at low cost, while in view of the lightning protection to anti-reverse MOSFET and comparator.
Description of the drawings
Fig. 1 is reverse-connection preventing circuit in the prior art；
Fig. 2 is that the DC supply input counnter attack of embodiment of the present invention fills the circuit diagram of circuit.
Specific implementation mode
The DC supply input counnter attack of present embodiment fills between the drain electrode and source electrode of circuit sampling delay startup MOSFET
Voltage generates a control signal, drags down when the voltage between the drain electrode of delay startup MOSFET and source electrode is less than reference voltage
The drive signal of anti-reverse MOSFET enables anti-reverse MOSFET turn off, prevents current flowing backwards, the energy on bulky capacitor passes through DC/
DC converters consume.
The DC supply input counnter attack of present embodiment fills circuit, including：Reverse-connection preventing circuit, soft-start circuit and sampling control
Circuit processed, reverse-connection preventing circuit include anti-reverse MOSFET, and soft-start circuit includes delay startup MOSFET, sampling control circuit sampling
Voltage between the drain electrode and source electrode of delay startup MOSFET, the voltage between the drain electrode and source electrode of delay startup MOSFET are less than ginseng
When examining voltage, anti-reverse MOSFET shutdowns are controlled, realization prevents current flowing backwards.The source electrode and delay startup of anti-reverse MOSFET
The source electrode of MOSFET connects, and tie point is as publicly.
Circuit is filled to the DC supply input counnter attack of present embodiment below in conjunction with the accompanying drawings to be described in further detail.
As shown in Fig. 2, the sampling control circuit of present embodiment includes bleeder circuit, comparator D1 and control pipe, partial pressure
Circuit is connected to the drain electrode of delay startup MOSFET (VT3) and publicly sampled voltage, the first partial pressure end of bleeder circuit are connected to
The inverting input of comparator D1, the second partial pressure end of bleeder circuit are connected to the in-phase input end of comparator D1, comparator D1
Output end be connected to the input terminal of control pipe, the control terminal of control pipe is connected to anti-reverse MOSFET (VT1), and comparator D1 exists
When the drain voltage of the delay startup MOSFET (VT3) of sampling is less than the voltage publicly of sampling, control control pipe turns off counnter attack
Meet MOSFET.
Bleeder circuit includes the first bleeder circuit and the second bleeder circuit, and the first bleeder circuit includes concatenated first resistor
R6 and second resistance R8, the second bleeder circuit include concatenated 3rd resistor R7 and the 4th resistance R9, the one of the first bleeder circuit
End is connect with one end of the second bleeder circuit, and the one end of the first bleeder circuit not connect with the second bleeder circuit is connected to slow open
Drain electrode (VT3) sampled voltage of dynamic MOSFET, the one end of the second bleeder circuit not connect with the first bleeder circuit is connected to public affairs
Sampled voltage altogether, the connecting pin of first resistor R6 and second resistance R8 is as the first partial pressure end, the electricity of 3rd resistor R7 and the 4th
The connecting pin of R9 is hindered as the second partial pressure end.One end that first bleeder circuit is connected with the second bleeder circuit is also associated with reference
Voltage (Vref)。
Control pipe uses triode VT2, the input terminal of the base stage of triode VT2 as control pipe, the current collection of triode VT2
The control terminal of pole and emitter as control pipe, the collector of triode VT2 are connected to the grid of anti-reverse MOSFET, triode
The emitter of VT2 is connected to the source electrode of anti-reverse MOSFET.
The anode of comparator D1 is connected to boost voltage (PVCC), and cathode is connected to publicly；The output end of comparator D1
The 7th resistance R4 is also in series between the base stage of triode VT2, comparator D1 anode and the output end of comparator D1 it
Between be also associated with the 8th resistance R5.Comparator D1 is less than same in the drain voltage of the delay startup MOSFET of the sampling of inverting input
When the voltage publicly of the sampling of phase input terminal, output HIGH voltage, driving triode VT2 conductings drag down anti-reverse MOSFET
Driving, close anti-reverse MOSFET.
Comparator D1 inverting input with publicly between be also associated with the second diode VD3 and the three or two in parallel
Pole pipe VD4 clamps the voltage of inverting input, prevents input overvoltage damage comparison device.Second diode VD3 is with respect to the three or two
Pole pipe VD4 negative directions connect, i.e.,：The inverting input of the cathode connection comparator of second diode VD3, anode connection are public
Ground；The inverting input of the anode connection comparator of third diode VD4, cathode connect publicly；Alternatively, on the contrary, second
The inverting input of the anode connection comparator of diode VD3, cathode connect publicly；The cathode of third diode VD4 connects
The inverting input of comparator, anode connection is publicly.
Soft-start circuit includes delay startup MOSFET (VT3), delay startup power resistor R10 and slow starting control circuit, is delayed
Startup power resistance R10 is in parallel with delay startup MOSFET, the connection of the source electrode of delay startup power resistor R10 and delay startup MOSFET
End and the source electrode of anti-reverse MOSFET (VT1) are connected to publicly, the leakage of delay startup power resistor R10 and delay startup MOSFET
The connecting pin of pole is connect with sampling control circuit, i.e., connects with the one end of the first bleeder circuit not connect with the second bleeder circuit
It connects, the grid of delay startup MOSFET and the output end of slow starting control circuit connect, the input terminal connection of slow starting control circuit
It is also connected to input to the connecting pin of the anode of input capacitance C1, the drain electrode of delay startup power resistor R10 and delay startup MOSFET
The cathode of capacitance C1, slow starting control circuit detect the voltage on input capacitance C1.
Delay startup MOSFET parallel connection delay startup power resistor R10, when powering on, delay startup MOSFET is closed, and is opened by slow
Dynamic power resistor R10 limitations booting dash current, when slow starting control circuit detects the voltage on input capacitance C1 close to defeated
When entering voltage, the MOSFET conductings of driving delay startup, short-circuit delay startup power resistor R10, sampling control circuit sampling delay startup
Voltage between the drain electrode (D) and source electrode (S) of MOSFET, the voltage between the drain electrode and source electrode of delay startup MOSFET are less than ginseng
When examining voltage, counnter attack MOSFET is turned off, current flowing backwards are prevented when realizing DC supply input short circuit, while not influencing to input counnter attack
Connection function.
Present embodiment using delay startup MOSFET (VT3) and anti-reverse MOSFET (VT1) intermediate connection points as publicly,
When power supply works normally, the voltage between the drain electrode and source electrode of delay startup MOSFET is that just, voltage swing depends on input current
With the Rds (on) of VT3, at this point, the obtained partial pressure value of comparator D1 inverting inputs is more than the reference voltage of in-phase input end, than
Output voltage compared with device D1 is close to reference ground, anti-reverse MOSFET (VT1) normally；In input short, delay startup
Voltage between the drain electrode and source electrode of MOSFET can be reduced rapidly, and be even reduced to negative value, this can cause the reverse phase of comparator D1 defeated
The partial pressure value for entering end is reduced rapidly, when partial pressure value is less than the reference voltage of in-phase input end, comparator output HIGH voltage, and three poles
Pipe VT2 conductings, the driving for dragging down anti-reverse MOSFET enable its shutdown, prevent current flowing backwards.
There is minimum normal work when minimum power input is unloaded, between the drain electrode and source electrode of delay startup MOSFET in power supply
The drain electrode of corresponding delay startup MOSFET and source when protection act occur for voltage Vmin=Iin (min) * Rds (on), comparator D1
The voltage of interpolar should be less than Vmin, while choose higher value as possible, to ensure that anti-reverse MOSFET is led when circuit works normally
Logical, when input short exception occurs, comparator D1 acts the anti-reverse MOSFET of shutdown as early as possible, prevents current flowing backwards.
Change first resistor R6 and second resistance R8, thus it is possible to vary corresponding delay startup MOSFET when comparator D1 actions
Voltage between drain electrode and source electrode is realized and turns off counnter attack when delay startup MOSFET flows through normal work low current or reverse current
Meet MOSFET.When circuit works normally, voltage between the drain electrode and source electrode of delay startup MOSFET depend on input current and
The size of MOSFET conducting resistances itself.Second resistance R8 may bear relatively high power at work, it is proposed that selection power resistor.
Reverse-connection preventing circuit includes anti-reverse MOSFET (VT1), anti-reverse bleeder circuit and the first diode VD1, anti-reverse
Bleeder circuit includes concatenated 5th resistance R1 and the 6th resistance R2, and one end of anti-reverse bleeder circuit is with anti-reverse MOSFET's
Grid connects, electrode input end of the other end as reverse-connection preventing circuit, and the drain electrode of anti-reverse MOSFET is as reverse-connection preventing circuit
The source electrode of negative input, anti-reverse MOSFET is connect with the source electrode of delay startup MOSFET, the first diode VD1 be connected in parallel on R1 and
Between the connecting pin of R2 and the source electrode of anti-reverse MOSFET.The collector of triode VT2 is attached to the connecting pin of R1 and R2.
The 7th resistance R3 is also parallel between the connecting pin of R1 and R2 and the source electrode of anti-reverse MOSFET.
Two-way Transient Voltage Suppressor TVS (VD5) is also parallel between the drain electrode and source electrode of anti-reverse MOSFET.It is double
To TVS be used for protecting anti-reverse MOSFET, preventing overvoltage, (lightning stroke or surge or input short cause VT1 to bear larger electricity
Compression) damage.
For not using MOSFET to carry out the circuit of delay startup, sampling resistor can be sealed in circuit and replaces delay startup
MOSFET is used for sampled voltage, and input counnter attack equally may be implemented and fill.But this scheme needs to increase a resistance, influences
Cost and PCB to power supply are laid out, while reducing power-efficient.
Present embodiment additionally provides a kind of DC supply input counnter attack irrigation method, including：
The delay startup metal oxide semiconductor field effect tube for including in sampling control circuit sampling soft-start circuit
Voltage between the drain electrode and source electrode of MOSFET；
When voltage of the sampling control circuit between the drain electrode and source electrode of delay startup MOSFET is less than reference voltage, control is anti-
The anti-reverse MOSFET shutdowns for including in reversal connection circuit.
Using the tie point of the source electrode of anti-reverse MOSFET and the source electrode of delay startup MOSFET as publicly.
When voltage of the sampling control circuit between the drain electrode and source electrode of delay startup MOSFET is less than reference voltage, control is anti-
The anti-reverse MOSFET shutdowns for including in reversal connection circuit, including：Drain electrode of the sampling control circuit in the delay startup MOSFET of sampling
When voltage is less than the voltage publicly of sampling, anti-reverse MOSFET is turned off.
Two-way Transient Voltage Suppressor TVS is also parallel between the drain electrode and source electrode of anti-reverse MOSFET, protection is anti-
Reversal connection MOSFET, prevents overvoltage from damaging.
Obviously, those skilled in the art should be understood that each module of the above invention or each step can be with general
Computing device realize that they can be concentrated on a single computing device, or be distributed in multiple computing devices and formed
Network on, optionally, they can be realized with the program code that computing device can perform, so as to be stored in
It is performed by computing device in storage device, either they are fabricated to each integrated circuit modules or will be in them
Multiple modules or step be fabricated to single integrated circuit module to realize.In this way, the present invention is not limited to any specific hard
Part and software combine.
Above this is merely a preferred embodiment of the present invention, and is not intended to restrict the invention, for the technology of this field
For personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of DC supply input counnter attack fills circuit, including：Reverse-connection preventing circuit, soft-start circuit and sampling control circuit, institute
It includes anti-reverse metal oxide semiconductor field effect tube MOSFET to state reverse-connection preventing circuit, and the soft-start circuit includes delay startup
The gentle startup power resistance of MOSFET, the sampling control circuit sample between the drain electrode and source electrode of the delay startup MOSFET
Voltage, when the voltage between the drain electrode and source electrode of the delay startup MOSFET is less than reference voltage, control is described anti-reverse
MOSFET is turned off；The delay startup MOSFET delay startup power resistors in parallel, when powering on, delay startup MOSFET is closed,
Booting dash current is limited by delay startup power resistor, when slow starting control circuit detects that the voltage in input capacitance is close
When input voltage, the MOSFET conductings of driving delay startup, the short circuit delay startup power resistor.
2. circuit as described in claim 1, it is characterised in that：
The source electrode of the anti-reverse MOSFET is connect with the source electrode of the delay startup MOSFET, and tie point is used as publicly, described
The drain electrode of delay startup MOSFET is connect with the sampling control circuit.
3. circuit as claimed in claim 1 or 2, which is characterized in that between the drain electrode and source electrode of the anti-reverse MOSFET
Also it is parallel with two-way Transient Voltage Suppressor TVS.
4. circuit as claimed in claim 2, which is characterized in that the sampling control circuit include bleeder circuit, comparator and
Control pipe, the bleeder circuit are connected to the drain electrode of the delay startup MOSFET and the publicly sampled voltage, the partial pressure
First partial pressure end of circuit is connected to the inverting input of the comparator, and the second partial pressure end of the bleeder circuit is connected to institute
The in-phase input end of comparator is stated, the output end of the comparator is connected to the input terminal of the control pipe, the control pipe
Control terminal is connected to the anti-reverse MOSFET, and drain voltage of the comparator in the delay startup MOSFET of sampling is less than sampling
Voltage publicly when, control the control pipe and turn off the anti-reverse MOSFET.
5. circuit as claimed in claim 4, which is characterized in that the comparator inverting input with it is described publicly it
Between be also associated with the second diode in parallel and third diode, clamp the voltage of the inverting input, the two or two pole
The opposite third diode negative direction connection of pipe.
6. circuit as claimed in claim 4, which is characterized in that the control pipe uses triode, the base stage of the triode
As the input terminal of the control pipe, the control terminal of the collector and emitter of the triode as the control pipe is described
The collector of triode is connected to the grid of the anti-reverse MOSFET, and the emitter of the triode is connected to described anti-reverse
The source electrode of MOSFET.
7. circuit as claimed in claim 6, which is characterized in that drain electrode electricity of the comparator in the delay startup MOSFET of sampling
Pressure less than sampling voltage publicly when, output HIGH voltage drives the triode ON, drags down the anti-reverse MOSFET
Driving, close the anti-reverse MOSFET.
8. a kind of DC supply input counnter attack irrigation method, including：
The delay startup metal oxide semiconductor field effect tube MOSFET for including in sampling control circuit sampling soft-start circuit
Voltage between drain electrode and source electrode；
When voltage of the sampling control circuit between the drain electrode and source electrode of the delay startup MOSFET is less than reference voltage, control
The anti-reverse MOSFET shutdowns for including in reverse-connection preventing circuit processed；
The method further includes：
The delay startup MOSFET parallel connections delay startup power resistor, when powering on, delay startup MOSFET is closed, and passes through delay startup work(
Rate resistance limitation booting dash current, when slow starting control circuit detects the voltage in input capacitance close to input voltage,
Drive delay startup MOSFET conductings, the short circuit delay startup power resistor.
9. method as claimed in claim 8, which is characterized in that further include：
Using the tie point of the source electrode of the anti-reverse MOSFET and the source electrode of the delay startup MOSFET as publicly.
10. method as claimed in claim 9, which is characterized in that the sampling control circuit is the delay startup MOSFET's
When voltage between drain electrode and source electrode is less than reference voltage, the anti-reverse MOSFET shutdowns for including in reverse-connection preventing circuit, packet are controlled
It includes：
The sampling control circuit is closed when the drain voltage of the delay startup MOSFET of sampling is less than the voltage publicly of sampling
Break the anti-reverse MOSFET.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210583448.1A CN103904620B (en) | 2012-12-28 | 2012-12-28 | A kind of DC supply input counnter attack fills circuit and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210583448.1A CN103904620B (en) | 2012-12-28 | 2012-12-28 | A kind of DC supply input counnter attack fills circuit and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103904620A CN103904620A (en) | 2014-07-02 |
| CN103904620B true CN103904620B (en) | 2018-09-14 |
Family
ID=50995823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210583448.1A Active CN103904620B (en) | 2012-12-28 | 2012-12-28 | A kind of DC supply input counnter attack fills circuit and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103904620B (en) |
Families Citing this family (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105337260A (en) * | 2014-08-13 | 2016-02-17 | 中兴通讯股份有限公司 | Backward flowing current control method, backward flowing current control circuit and power converter |
| CN104378098B (en) * | 2014-11-24 | 2018-05-22 | 苏州汇川技术有限公司 | Power on buffer circuit and electric vehicle motor control system |
| CN104505807A (en) * | 2014-12-10 | 2015-04-08 | 无锡必创传感科技有限公司 | Automobile sensor protection circuit |
| CN107294365A (en) * | 2016-03-30 | 2017-10-24 | 中兴通讯股份有限公司 | A kind of power supply circuit and negative sense carrying out surge protection method |
| CN105790675A (en) * | 2016-05-23 | 2016-07-20 | 青岛歌尔声学科技有限公司 | Automatic leakage circuit for reverse electro-dynamic potential of motor |
| CN106533142B (en) * | 2016-10-18 | 2023-05-26 | 成都前锋电子仪器有限责任公司 | Anti-backflow circuit |
| CN106655385A (en) * | 2016-12-28 | 2017-05-10 | 深圳市科陆电子科技股份有限公司 | Anti-reverse connection system and method applied to battery management unit equalization channels |
| CN108512426A (en) * | 2017-02-27 | 2018-09-07 | 中兴通讯股份有限公司 | Switching Power Supply control method, device and switch power controller |
| CN107026564B (en) * | 2017-05-23 | 2023-05-23 | 深圳振华富电子有限公司 | Electronic device and power supply slow start equipment thereof |
| CN107359608A (en) * | 2017-09-05 | 2017-11-17 | 山东超越数控电子有限公司 | A kind of direct current prevents reversed protection circuit |
| CN107658861B (en) * | 2017-10-20 | 2024-07-19 | 京信网络系统股份有限公司 | Protection circuit and method for preventing POE power supply from being misplaced |
| CN108183469B (en) * | 2018-01-02 | 2020-02-07 | 重庆长安汽车股份有限公司 | Prevent that high limit drive power supply from connecting protection circuit and vehicle control unit in reverse |
| CN108599285B (en) * | 2018-01-05 | 2020-12-04 | 许继电源有限公司 | Direct current output prevents flowing backward protection circuit |
| CN109104079A (en) * | 2018-10-17 | 2018-12-28 | 天津七二通信广播股份有限公司 | A kind of preventing reverse connection for DC power source soft-start circuit and implementation method |
| CN109842108B (en) * | 2019-02-25 | 2020-07-07 | 西安微电子技术研究所 | Multi-path heavy-current power supply grid-connected reverse-filling-prevention power distribution device |
| CN111836429B (en) * | 2019-04-17 | 2024-06-25 | 常州星宇车灯股份有限公司 | Heavy-current multi-input anti-backflow low-voltage drop anti-reverse connection circuit, LED driver and vehicle |
| CN110086162B (en) * | 2019-06-17 | 2020-04-28 | 珠海格力电器股份有限公司 | Direct-current power supply anti-reverse connection circuit with self-checking interlocking anti-interference function |
| CN112787311A (en) * | 2019-11-11 | 2021-05-11 | 中兴通讯股份有限公司 | Protection circuit for power supply and power supply |
| CN112003242B (en) * | 2020-08-03 | 2021-07-30 | 珠海格力电器股份有限公司 | Protection device and method for IGBT (insulated Gate Bipolar transistor) driving power supply in automobile and automobile |
| CN112188712A (en) * | 2020-11-16 | 2021-01-05 | 华域视觉科技(上海)有限公司 | Vehicle lamp driving system and control method thereof |
| CN114244091B (en) * | 2021-12-17 | 2023-03-24 | 迈思普电子股份有限公司 | Anti-backflow output switch |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201181903Y (en) * | 2008-04-01 | 2009-01-14 | 中兴通讯股份有限公司 | Input circuit of DC power supply |
| CN201898330U (en) * | 2010-11-12 | 2011-07-13 | 无锡新茂科技有限责任公司 | Reverse-connection-preventive circuit |
| CN102136724A (en) * | 2011-01-26 | 2011-07-27 | 华为技术有限公司 | Method and device for protecting reverse connection prevention and slow start of direct-current power supply input |
| CN102570785A (en) * | 2010-12-30 | 2012-07-11 | 中兴通讯股份有限公司 | Direct-current power supply hot plug slow starting control circuit and control method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19717527A1 (en) * | 1997-04-25 | 1998-10-29 | Bosch Gmbh Robert | Electronic circuit with reverse polarity protection |
-
2012
- 2012-12-28 CN CN201210583448.1A patent/CN103904620B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201181903Y (en) * | 2008-04-01 | 2009-01-14 | 中兴通讯股份有限公司 | Input circuit of DC power supply |
| CN201898330U (en) * | 2010-11-12 | 2011-07-13 | 无锡新茂科技有限责任公司 | Reverse-connection-preventive circuit |
| CN102570785A (en) * | 2010-12-30 | 2012-07-11 | 中兴通讯股份有限公司 | Direct-current power supply hot plug slow starting control circuit and control method |
| CN102136724A (en) * | 2011-01-26 | 2011-07-27 | 华为技术有限公司 | Method and device for protecting reverse connection prevention and slow start of direct-current power supply input |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103904620A (en) | 2014-07-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103904620B (en) | A kind of DC supply input counnter attack fills circuit and method | |
| CN105703614B (en) | A kind of reverse connection preventing pours in down a chimney protection circuit | |
| CN201898330U (en) | Reverse-connection-preventive circuit | |
| CN204119020U (en) | A kind of PFC protective circuit and air conditioner | |
| CN111245220A (en) | Three-level power conversion circuit and voltage clamping method | |
| CN109301796A (en) | A kind of PFC current foldback circuit and controller | |
| CN107634504B (en) | Protection control device, the protection controller of PFC pfc circuit | |
| CN101436771A (en) | Power supply under-voltage protection circuit and power supply comprising same | |
| CN105846665B (en) | A kind of normal open type SiC JFET driving circuit with self-protection function | |
| CN206389106U (en) | A kind of brush DC compressor variable frequency device with overcurrent protection | |
| CN201877778U (en) | Overcurrent protection circuit of solar street lamp | |
| CN206727724U (en) | Active and standby dc source with defencive function | |
| CN101872967B (en) | IGBT (Insulated Gate Bipolar Transistor) breakdown protection circuit | |
| CN103595286A (en) | Dead-time compensation method and circuit used for bipolar modulation inverter bridge | |
| CN108809069A (en) | A kind of monocycle peak current limit circuit | |
| CN205753364U (en) | A kind of induction heating power overvoltage crowbar in parallel | |
| CN209344754U (en) | A kind of PFC current foldback circuit and controller | |
| CN106602533A (en) | Overvoltage protection circuit used for power distribution cabinet | |
| CN106941316A (en) | A kind of non-bridge PFC circuits | |
| CN206807284U (en) | A kind of non-bridge PFC circuits | |
| CN209104791U (en) | A kind of motor overcurrent protection circuit | |
| CN203339686U (en) | Constant current source short circuit protection inhibition circuit | |
| CN108683416A (en) | A kind of load switch control circuit | |
| CN106505528B (en) | A kind of flash driving current foldback circuit realized using discrete component | |
| CN206584926U (en) | A kind of gate protection circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20180613 Address after: 210012 No. 68, Bauhinia Road, Ningnan street, Yuhuatai District, Nanjing, Jiangsu Applicant after: Nanjing Zhongxing Software Co., Ltd. Address before: 518057 Nanshan District high tech Industrial Park, Shenzhen, Guangdong, Ministry of justice, Zhongxing Road, South China road. Applicant before: ZTE Corporation |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191104 Address after: 518057 Nanshan District science and Technology Industrial Park, Guangdong high tech Industrial Park, ZTE building Patentee after: ZTE Communications Co., Ltd. Address before: 210012 Nanjing, Yuhuatai District, South Street, Bauhinia Road, No. 68 Patentee before: Nanjing Zhongxing Software Co., Ltd. |
|
| TR01 | Transfer of patent right |