CN110518543A - A kind of short-circuit protection circuit and power supply system - Google Patents
A kind of short-circuit protection circuit and power supply system Download PDFInfo
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- CN110518543A CN110518543A CN201910824912.3A CN201910824912A CN110518543A CN 110518543 A CN110518543 A CN 110518543A CN 201910824912 A CN201910824912 A CN 201910824912A CN 110518543 A CN110518543 A CN 110518543A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
Abstract
The present invention provides a kind of short-circuit protection circuits comprising current monitoring module, short-circuit respond module and switch module: switch module and load connect；Current monitoring module is connect with switch module；Short-circuit respond module is connect with current monitoring module and switch module.Switch module is used to control the on-off of load current path；Current monitoring module real-time monitoring load current, when short circuit occurs, the first voltage signal of current monitoring module output is greater than preset threshold, can reliably trigger short-circuit respond module；Short-circuit respond module receives first voltage signal, can quickly export duration driving signal in load short circuits and be turned off and kept with control switch module.At this point, the duration driving signal of short-circuit respond module output can make switch module complete switch off, rather than in switch intermediate state.
Description
Technical field
The invention belongs to short-circuit protection technical field more particularly to a kind of short-circuit protection circuit and power supply systems.
Background technique
Currently, traditional short-circuit protection circuit has the following problems:
1, using N-type MOSFET as the control switch of core, pass through the shutdown of load current change triggers N-MOSFET；Short circuit
The current value of load, the control switch and current limliting module is flowed through when generation, is not to rise mutation.In the mistake that electric current rises
The pressure drop of Cheng Zhong, current limliting module are gradually increased, and the switch in short circuit protection module is gradually turned on, and short circuit protection module is output to
The voltage of metal-oxide-semiconductor controlled end is gradually reduced, and the metal-oxide-semiconductor is also gradually from conducting to shutdown transition, and further limiting short-circuit current
Rising.According to theory analysis and actual test as a result, the above process eventually makes the N-MOSFET in control switch will not
It thoroughly complete switches off, but is in the biggish intermediate state of resistance, while load current is in a reduced levels rather than complete
It is all zero.Particularly, PoE (Power Over Ethernet, Power over Ethernet) application in, output voltage be generally 48V or
Person 53.5V；In this application scenarios, PoE voltage is mainly added between source and drain the two poles of the earth of N-MOSFET, at this time on MOSFET
Huge power consumption can be such that it burns in a very short period of time, so that irreversible damage occurs for entire PoE equipment.
2, using p-type MOSFET as the control switch of core, pass through the shutdown of output voltage change triggers P-MOSFET.When negative
Carry short circuit when, if short circuit current still within the scope of the load capacity of power supply unit, for example, have a fairly large number of PoE feeder ear
Jaws equipment, single port power limit only account for very little part compared with complete machine load capacity, under this application scenarios, then output voltage without
The case where obvious to fall or only partially fall, while electric current dramatically increases, the short-circuit protection circuit can not be touched normally at this time
Hair, leads to that short-circuit protection function cannot be started.Thus the risk that load equipment is burnt is introduced.
Therefore, it cannot reliably be triggered in traditional technical solution there are the starting of short-circuit protection circuit and short circuit occurs
When can not rapidly make control switch in an off state problem.
Summary of the invention
The purpose of the present invention is to provide a kind of short-circuit protection circuits, it is intended to solve short present in traditional technical solution
The problem that road can not rapidly make control switch in an off state when occurring.
In a first aspect, the embodiment of the present disclosure provides a kind of short-circuit protection circuit comprising current monitoring module, short circuit are rung
Answer module and switch module；Switch module is connected with load, for controlling the on-off of load current path；Current monitoring mould
Block is connect with switch module, and current monitoring module exports first voltage letter for monitoring load current, and according to load current
Number；And short-circuit respond module, it is connect with current monitoring module and switch module, short-circuit respond module receives first voltage letter
Number, it turns off and keeps with control switch module for quickly exporting duration driving signal in load short circuits, when load short circuits,
First voltage signal is greater than preset threshold.
With reference to first aspect, in the first embodiment of first aspect, short-circuit respond module includes the first power supply, holds
Row switch unit and auxiliary switching element；Switch unit is executed to be connect with current monitoring module to access first voltage signal,
Duration driving signal is exported when for load short circuits to turn off and keep with control switch module；Auxiliary switching element is opened with execution
Unit connection is closed, is tended to remain on for controlling execution switch unit according to duration driving signal.
The first embodiment with reference to first aspect, in second of embodiment of first aspect, short circuit response mould
Block further includes first voltage controller, is connect with current monitoring module and execution switch unit, for the first electricity to access
Signal is pressed to carry out voltage conversion, and output makes to execute the second voltage that switch unit is triggered on state in load short circuits
Signal.
The first embodiment with reference to first aspect, in the third embodiment of first aspect, short circuit response mould
Block further includes second voltage controller, is connect with the first power supply and auxiliary switching element, for carrying out voltage to the first power supply
Conversion is to export tertiary voltage signal.
With reference to first aspect or the first embodiment of first aspect, in the 4th kind of embodiment of first aspect
In, current monitoring module includes the first divider, and the first end of the first divider is used for the near end of connection switch module, and first
The second end of divider is grounded.
The 4th kind of embodiment with reference to first aspect, in the 5th kind of embodiment of first aspect, first voltage control
Device processed includes the second divider and the adjustable third divider of resistance value, the second end of the second divider and the first of the first divider
End connection, the first end of the second divider connect with the first end of third divider, the second end of third divider and first point
The second end of depressor connects.
It is single to execute switch in the 6th kind of embodiment of first aspect for the 5th kind of embodiment with reference to first aspect
Member includes the first triode, and the first end of the second divider is connect with the base stage of the first triode, the emitter of the first triode
Ground connection, the collector of the first triode are used for the control terminal of connection switch module.
The 6th kind of embodiment with reference to first aspect, in the 7th kind of embodiment of first aspect, auxiliary switch list
Member includes the second triode, and the collector of the first triode connect with the base stage of the second triode, the base stage of the first triode and
The collector of second triode connects, and the emitter of the second triode is connect with the first power supply.
The 7th kind of embodiment with reference to first aspect, in the 8th kind of embodiment of first aspect, second voltage control
Device processed includes the 4th divider and the 5th divider, the first end of the emitter of the second triode and the 4th divider and the 5th point
The first end of depressor connects, and the second end ground connection of the 5th divider, the second end of the 4th divider is connect with the first power supply.
Second aspect, the embodiment of the present disclosure provide a kind of power supply system comprising second source and control unit, control
The output end of unit and the control terminal of switch module connect, and second source is connect by loading load end close with switch module,
The near end of switch module is connect with the first end of current monitoring module, the second end ground connection of current monitoring module, switch module
Control terminal for receiving duration driving signal, power supply system further includes the short-circuit protection circuit of any of the above-described embodiment.
Above-mentioned short-circuit protection circuit passes through current monitoring module real-time monitoring load current, when short circuit occurs, electric current
The first voltage signal of monitoring modular output can reliably trigger short-circuit respond module, at this point, short-circuit respond module can be directly
Duration driving signal is exported, quick control switch module is complete switched off and is kept, rather than in switch intermediate state.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some
Embodiment for those of ordinary skill in the art without any creative labor, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is one of a kind of short-circuit protection circuit that one embodiment of the disclosure provides and structural schematic diagram of power supply system；
Fig. 2 is the second structural representation of a kind of short-circuit protection circuit and power supply system that one embodiment of the disclosure provides；
Fig. 3 is the third structural representation of a kind of short-circuit protection circuit and power supply system that one embodiment of the disclosure provides；
Fig. 4 is the four of the structural schematic diagram of a kind of short-circuit protection circuit that one embodiment of the disclosure provides and power supply system；
Fig. 5 is a kind of exemplary circuit schematic diagram of short-circuit protection circuit and power supply system shown in Fig. 4.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Fig. 1 shows the short-circuit protection circuit of one embodiment of disclosure offer and the structural schematic diagram of power supply system, in order to
Convenient for explanation, only the parts related to this embodiment are shown, and details are as follows:
A kind of short-circuit protection circuit comprising current monitoring module 100, short-circuit respond module 200 and switch module
300；Switch module 300 and load connect, for controlling the on-off of load current path；Current monitoring module 100 and switching molding
Block 300 connects, and exports first voltage signal for monitoring load current, and according to load current；Short-circuit respond module 200 and electricity
It flows monitoring modular 100 and switch module 300 connects, short-circuit respond module receives first voltage signal, in load short circuits
Output duration driving signal is turned off and is kept with quick control switch module 300, and when load short circuits, first voltage signal is greater than
Preset threshold.
Specifically, current monitoring module 100 is connected in load circuit, the near end of first end and switch module 300
Connection, second end ground connection are used for real-time detection load current, and export first voltage signal corresponding with load current；
The circuit configurations mode of this detection load short circuits necessarily causes the current value for flowing through load to increase, to increase when short circuit
The voltage value of first voltage signal corresponding with current value, this change procedure is very reliable, applicable all types of short circuits
State-detection.Under normal condition, the voltage value of first voltage signal is not enough to trigger short-circuit respond module 200 and exports duration drive
Dynamic signal, then switch module 300 is in normal operating conditions；When load short circuits, the current value for flowing through load increases, and leads to electricity
The voltage value for flowing the first voltage signal that monitoring modular 100 exports increases, greater than the preset threshold of short-circuit respond module 200, from
And trigger short-circuit respond module 200 and export duration driving signal, at this point, duration driving signal control switch module 300 is closed
Break and keeps, fast and reliable protection purpose when realizing short circuit with this.
As shown in Fig. 2, short-circuit respond module 200 includes the first power vd D, executes switch in one of the embodiments,
Unit 220 and auxiliary switching element 230；Switch unit 220 is executed to connect with current monitoring module 100 to access first voltage
Signal exports duration driving signal and is turned off and kept with control switch module 300 when for load short circuits；Auxiliary switching element
230 connect with execution switch unit 220 and the first power vd D, execute switch unit for controlling according to duration driving signal
220 tend to remain on.It is understood that preset threshold is the on state threshold voltage for executing switch unit 220.Specifically,
The access of first voltage signal executes the input terminal of switch unit 220, executes the output end and auxiliary switching element of switch unit 220
230 input terminal is connected with the control terminal of switch module 300, the output end and execution switch unit 220 of auxiliary switching element 230
Input terminal connection, the third end of auxiliary switching element 230 is connected with DC power supply；When load short circuits, first voltage signal
Can trigger execute switch unit 220 on state change, the driving signal exported at this time start control switch module 300 by
It is connected to shutdown and changes；Meanwhile the change triggers auxiliary switching element 230 of duration driving signal is changed on state, this
When, the third end of auxiliary switching element 230 is connected with the output end of auxiliary switching element 230, will execute the defeated of switch unit 220
Enter to hold voltage clamp in a high position, and then is fully on execution switch unit 220, it can when short circuit occurs for load
Duration driving signal is exported to turn off switch module 300 for a full due.
As shown in figure 3, short-circuit respond module 200 further includes first voltage controller 210 in one of the embodiments,
It connect with current monitoring module 100 and execution switch unit 220, turns for carrying out voltage to the first voltage signal of access
It changes, and output makes to execute the second voltage signal that switch unit 220 is triggered on state in load short circuits.
Specifically, first is concatenated between the output end of current monitoring module 100 and the input terminal for executing switch unit 220
Voltage controller 210, the first voltage controller 210 are used to carry out voltage adjusting to first voltage signal, so that its output
Second voltage signal, which can be triggered reliably, executes switch unit 220, and exports duration driving signal.Improve the first electricity of regulation
Press the convenient and efficient of signal.
As shown in figure 4, short-circuit respond module 200 further includes second voltage controller 240 in one of the embodiments,
It connect with the first power vd D and auxiliary switching element 230, for carrying out voltage conversion to the first power vd D to export third
Voltage signal.
Specifically, the voltage value of the first power supply of access is adjusted by second voltage controller 240, in load short circuits
When, after the input terminal of auxiliary switching element 230 receives duration driving signal, it is ensured that the output end of auxiliary switching element 230
It is connected with the third end of auxiliary switching element 230, the input terminal voltage for executing switch unit 220 is rapidly clamped down in can
Make to execute the range of voltage values in the conductive state of switch unit 220.
As shown in figure 4, first voltage controller 210 accesses first voltage signal in one of the embodiments, and to the
One voltage signal exports second voltage signal after being divided, to ensure that second voltage signal does not trigger execution in normal state
Switch unit 220, at this point, it is in an off state to execute switch unit 220；When short circuit, the triggering of second voltage signal, which executes, is opened
Unit 220 is closed, starts to be changed from off state on state at this point, executing switch unit 220, exports the driving gradually decreased
Signal；The driving signal introduces auxiliary switching element 230, the 4th voltage signal one that second voltage controller 240 exports simultaneously
It is direct-connected to connect auxiliary switching element 230, at this point, auxiliary switching element 230 changes since off state on state, thus will
The tertiary voltage signal of output is connected at second voltage signal, will be executed switch unit 220 and is thoroughly clamped down in fully on shape
State executes the duration driving signal control switch module 300 that switch unit 220 exports at this time and complete switches off shape in thorough
State.This scheme avoids the equilibrium state when short circuit occurred in traditional technical solution, i.e. control switch module 300 is in and opens
Intermediate state is closed, exists and burns risk.
As shown in figure 5, current monitoring module 100 includes the first divider R1 in one of the embodiments,；First partial pressure
The first end of device R1 is used for the output end of connection switch module 300；The second end of first divider R1 is grounded.
Specifically, the first end of the first divider R1 exports first voltage signal；It is not limited to herein using single electricity
Resistance, is also possible to the combination of multiple resistance；Divider is also possible to slide rheostat or variable resistance.
As shown in figure 5, first voltage controller 210 includes the second divider R2 and resistance value in one of the embodiments,
Adjustable third divider R3；The second end of second divider R2 is connect with the first end of the first divider R1；Second divider
The first end of R2 is connect with the first end of third divider R3；The second of the second end of third divider R3 and the first divider R1
End connection.
Specifically, the first end of the second divider R2 exports second voltage signal；It is not limited to herein using the program,
Other variable resistance, slide rheostat or other impedance transformer networks for can be realized voltage adjusting can also be with.
As shown in figure 5, executing switch unit 220 in one of the embodiments, includes the first triode Q1, Q1 NPN
Type triode；The first end of second divider R2 is connect with the base stage of the first triode Q1；The emitter of first triode Q1 connects
Ground；The collector of first triode Q1 is used for the control terminal of connection switch module 300.
Specifically, when load short circuits, the second voltage signal of the base stage access of the first triode Q1 triggers itself and starts
Become being connected from shutdown, then the collector of the first triode Q1 exports a driving signal gradually decreased；It is understood that
It is that above-mentioned preset threshold is the on state threshold voltage of the first triode Q1.Execution switch unit is not limited to use and be somebody's turn to do
Scheme is also possible to the combination of switching circuit or circuit that other can be realized its effect.
As shown in figure 5, auxiliary switching element 230 includes the second triode Q2, Q2 PNP in one of the embodiments,
Type triode；The collector of first triode Q1 is connect with the base stage of the second triode Q2；The base stage of first triode Q1 and the
The collector of two triode Q2 connects；The emitter of second triode Q2 is connect with the first power vd D.
Specifically, when load short circuits, the driving signal of the collector output of the first triode Q1 gradually decreased, access
The base stage of second triode Q2, at this point, the voltage difference between the emitter and base stage of the second triode Q2 makes the second triode
Q2 conducting so that the base voltage of the first triode Q1 is clamped at high level, and then guarantees that the first triode Q1 is in and leads
Logical state.
As shown in figure 5, second voltage controller 240 includes the 4th divider R4 and the 5th in one of the embodiments,
Divider R5；The emitter of second triode Q2 and the first end of the 4th divider R4 and the first end of the 5th divider R5 connect
It connects；The second end of 5th divider R5 is grounded；The second end of 4th divider R4 is connect with the output end of the first power vd D.
Specifically, second voltage controller 240 or adjustable resistance or other impedance transformer networks.
Specifically, when loading normal work, first voltage controller 210 is passed through in the pressure drop in current monitoring module 100
The second divider R2 and third divider R3 partial pressure after so that the base voltage of the first triode Q1 is lower than conduction threshold, the
One triode Q1 is in an off state.First power vd D is divided through the 4th divider R4 of second voltage controller 240 and the 5th
After device R5 partial pressure, so that voltage value of the emitter voltage value of the second triode Q2 lower than the duration driving signal that it is introduced,
That is, lower than the control terminal voltage of switch module 300 or the collector voltage of the first triode Q1.Auxiliary switch is at this time
Off state.
When short circuit occurs for load, second point of first voltage controller 210 is passed through in the pressure drop in current monitoring module 100
After depressor R2 and third divider R3 partial pressure, so that the base voltage (second voltage signal) of the first triode Q1 is greater than conducting threshold
Value, the first triode Q1 start to be changed from off state on state.The base voltage of the second triode Q2 is pulled low at this time,
Second triode Q2 conducting, so that the base voltage of the first triode Q1 is clamped at a high position, ensure that the first triode
Q1 indeed is on state and keeps.It is successfully avoided in this way when switch module 300 gradually turns off, load current gradually subtracts
Hour, the first triode Q1 is in switch intermediate state risk, also avoids what load equipment fully powered-off cannot may cause
Damage.
As shown in Figures 1 to 5, present disclose provides a kind of power supply systems in one of the embodiments, comprising second
The output end of power supply VCC and control module 400, control module 400 is connect with the control terminal of switch module 300, second source VCC
It is connect by loading with the input terminal of switch module 300, the output end of switch module 300 and the first of current monitoring module 100
End connection, the second end ground connection of current monitoring module 100, the control terminal of switch module 300 are used to introduce duration driving signal,
Power supply system can also include any short-circuit protection circuit in above-described embodiment.
Specifically, second source VCC is load supplying, and flows into current monitoring module by switch module 300, is then connect
Ground.When normal condition, the on state of 400 control switch module 300 of control module；When short-circuit, short-circuit protection circuit control is opened
It closes module 300 and is in the state that complete switches off, short-circuit protection movement is fast and reliable.
The output end of control module 400 is connect with the grid of field-effect tube Q3；The source electrode and current monitoring of field-effect tube Q3
The first end of module 100 connects；The drain electrode of field-effect tube Q3 is connect with the output end of load；Herein, field-effect tube Q3 is N-type
MOSFET。
In use above scene, the short-circuit protection circuit that the disclosure provides is made of pure hardware completely, and used
Circuit components quantity is few, and circuit structure is simplified, and based on this, can construct the inexpensive application scheme in different scenes.
In wherein one application, which be can be applied in Power over Ethernet (PoE) circuit, especially pair
In the non-standard PoE circuit of cost sensitivity.Generally, the PSE that will use the companies such as TI using the equipment of PoE technology in the industry is special
With managing chip, the management function for meeting IEEE 802.3af/at consensus standard is realized.It is generally wrapped in dedicated management chip used
It is designed containing short-circuit protection.But it without strict demand but in the application scenarios more sensitive to cost, is needed in some pairs of PoE management functions
Want the higher non-standard PoE Managed Solution of cost performance.It needs additionally to realize short-circuit protection function by design of hardware and software at this time.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. a kind of short-circuit protection circuit characterized by comprising
Switch module is connected with load, and the switch module is used to control the on-off of the current path of the load；
Current monitoring module is connect with the switch module, and the current monitoring module is used to monitor the electric current of the load, and
First voltage signal is exported according to the electric current of the load；And
Short-circuit respond module is connect with the current monitoring module and the switch module, and the short circuit respond module receives institute
First voltage signal is stated, the switch module is controlled for quickly exporting duration driving signal in the load short circuits and is closed
Break and keep, when the load short circuits, the first voltage signal is greater than preset threshold.
2. short-circuit protection circuit as described in claim 1, which is characterized in that it is described short circuit respond module include:
First power supply；
Switch unit is executed, is connect with the current monitoring module to access the first voltage signal, it is short for the load
The duration driving signal is exported when road to be turned off and keep to control the switch module；And
Auxiliary switching element is connect with the execution switch unit and first power supply, for being driven according to the duration
Signal controls the execution switch unit and tends to remain on.
3. short-circuit protection circuit as claimed in claim 2, which is characterized in that the short circuit respond module further include:
First voltage controller is connect, for described in access with the current monitoring module and the execution switch unit
First voltage signal carries out voltage conversion, and output makes the execution switch unit be triggered conducting in the load short circuits
The second voltage signal of state.
4. short-circuit protection circuit as claimed in claim 2, which is characterized in that the short circuit respond module further include:
Second voltage controller is connect with first power supply and the auxiliary switching element, for first power supply into
Row voltage is converted to export tertiary voltage signal.
5. short-circuit protection circuit as described in claim 1, which is characterized in that the current monitoring module includes the first partial pressure
Device,
The first end of first divider is used to connect the near end of the switch module, the second end of first divider
Ground connection.
6. short-circuit protection circuit as claimed in claim 5, which is characterized in that the first voltage controller includes the second partial pressure
Device and the adjustable third divider of resistance value,
The second end of second divider is connect with the first end of first divider, the first end of second divider
It is connect with the first end of the third divider, the second end of the second end of the third divider and first divider connects
It connects.
7. short-circuit protection circuit as claimed in claim 6, which is characterized in that the execution switch unit includes the one or three pole
Pipe,
The first end of second divider is connect with the base stage of first triode, and the emitter of first triode connects
Ground, the collector of first triode are used to connect the control terminal of the switch module.
8. short-circuit protection circuit as claimed in claim 7, which is characterized in that the auxiliary switching element includes the two or three pole
Pipe,
The collector of first triode is connect with the base stage of second triode, the base stage of first triode and institute
The collector connection of the second triode is stated, the emitter of second triode is connect with first power supply.
9. short-circuit protection circuit as claimed in claim 8, which is characterized in that the second voltage controller includes the 4th partial pressure
Device and the 5th divider,
The first end of the first end and the 5th divider of the emitter of second triode and the 4th divider connects
It connects, the second end ground connection of the 5th divider, the second end of the 4th divider is connect with first power supply.
10. a kind of power supply system, including second source and control module, the output end of described control unit and the switch module
Control terminal connection, the second source connect by loading close with the switch module load end, the switch module
Near end is connect with the first end of the current monitoring module, the second end ground connection of the current monitoring module, the switching molding
The control terminal of block is for introducing the duration driving signal, which is characterized in that further includes such as any one of claim 1 to 9 institute
The short-circuit protection circuit stated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910824912.3A CN110518543B (en) | 2019-09-02 | 2019-09-02 | Short-circuit protection circuit and power supply system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910824912.3A CN110518543B (en) | 2019-09-02 | 2019-09-02 | Short-circuit protection circuit and power supply system |
Publications (2)
| Publication Number | Publication Date |
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| CN110518543A true CN110518543A (en) | 2019-11-29 |
| CN110518543B CN110518543B (en) | 2022-05-24 |
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| CN201910824912.3A Active CN110518543B (en) | 2019-09-02 | 2019-09-02 | Short-circuit protection circuit and power supply system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114256962A (en) * | 2021-12-17 | 2022-03-29 | 苏州浪潮智能科技有限公司 | Circuit and method for improving power supply safety and reliability |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN206293889U (en) * | 2016-12-30 | 2017-06-30 | 惠州市蓝微电子有限公司 | A kind of load short-circuit protection circuit |
| CN207265645U (en) * | 2017-10-23 | 2018-04-20 | 北京车和家信息技术有限公司 | A kind of short-circuit protection circuit of driving load |
| CN109818330A (en) * | 2019-04-02 | 2019-05-28 | 深圳市嘉昱机电有限公司 | A kind of short-circuit protection circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206293889U (en) * | 2016-12-30 | 2017-06-30 | 惠州市蓝微电子有限公司 | A kind of load short-circuit protection circuit |
| CN207265645U (en) * | 2017-10-23 | 2018-04-20 | 北京车和家信息技术有限公司 | A kind of short-circuit protection circuit of driving load |
| CN109818330A (en) * | 2019-04-02 | 2019-05-28 | 深圳市嘉昱机电有限公司 | A kind of short-circuit protection circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114256962A (en) * | 2021-12-17 | 2022-03-29 | 苏州浪潮智能科技有限公司 | Circuit and method for improving power supply safety and reliability |
| CN114256962B (en) * | 2021-12-17 | 2023-08-15 | 苏州浪潮智能科技有限公司 | Circuit and method for improving power supply safety and reliability |
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| Publication number | Publication date |
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| CN110518543B (en) | 2022-05-24 |
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