CN209545129U - A kind of short-circuit protection circuit - Google Patents
A kind of short-circuit protection circuit Download PDFInfo
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- CN209545129U CN209545129U CN201920460776.XU CN201920460776U CN209545129U CN 209545129 U CN209545129 U CN 209545129U CN 201920460776 U CN201920460776 U CN 201920460776U CN 209545129 U CN209545129 U CN 209545129U
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- switching tube
- circuit
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- pipe
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Abstract
The utility model discloses a kind of short-circuit protection circuits, comprising: switching tube, shutdown holding circuit and adjusting resistance；The one control voltage input end of grid connection of the switching tube, source electrode connect described one end for adjusting resistance, and drain electrode is for connecting load；The first end point of the shutdown holding circuit connects the grid of the switching tube, and the second endpoint connects the source electrode of the switching tube, and third endpoint connects the other end for adjusting resistance；The other end for adjusting resistance is for being grounded or connecting power supply.The short-circuit protection to load equipment may be implemented in technical solution according to the present utility model, not only it is each occur to have the function of after short circuit shutdown keep with re-power can recovery characteristics, also can reach the short-circuit response speed of nanosecond, at low cost and long service life etc..
Description
Technical field
The utility model relates to protect field of circuit technology more particularly to a kind of short-circuit protection circuit.
Background technique
Electrical equipment in actual use, due to improper operation etc., it is existing to tend to occur short circuit
As, and then may cause the damage etc. of electrical equipment.In the prior art, to provide short-circuit protection, it is most of using
Fuse namely fuse are accessed in route.Since fuse is to pass through self-heating and fuse, thus disconnecting circuit
Connection is to reach protection circuit purpose.
However, first is that having irrecoverability, when short circuit occurs every time for circuit, being melted for the scheme using fuse
The fuse that disconnected device must more renew after fusing can just resume work, on long terms, cost with higher；Second is that fusing is rung
Should be slow, since the temperature of the inside fusible material of fuse will not be mutated, so the short-circuit response time is longer.
Utility model content
In view of the above problems, the utility model provides a kind of short-circuit protection circuit, by using switching tube and by two
The shutdown holding circuit of triode composition realizes short-circuit protection, to solve irrecoverability and the fusing of existing fuse scheme
The problems such as low-response.
The utility model embodiment proposes a kind of short-circuit protection circuit, comprising: switching tube, shutdown holding circuit and adjusting electricity
Resistance；
The one control voltage input end of grid connection of the switching tube, source electrode connect described one end for adjusting resistance, drain electrode
It is loaded for connecting；
The first end point of the shutdown holding circuit connects the grid of the switching tube, and the second endpoint connects the switching tube
Source electrode, third endpoint connect it is described adjust resistance the other end；
The other end for adjusting resistance is for being grounded or connecting power supply.
In above-mentioned short-circuit protection circuit, optionally, the shutdown holding circuit includes that a PNP pipe and a NPN are managed, institute
The collector for stating PNP pipe connects the base stage of the NPN pipe, and the collector of the NPN pipe connects the base stage of the PNP pipe；
When the switching tube is NMOS tube, the other end for adjusting resistance is for being grounded；The emitter of the PNP pipe
It is connected to the first end point, the base stage of the NPN pipe is connected to second endpoint, and the emitter of the NPN pipe is connected to
The third endpoint.
It is optionally, described to adjust the another of resistance when the switching tube is PMOS tube in above-mentioned short-circuit protection circuit
One end is for connecting the power supply；
The emitter of the NPN pipe is connected to the first end point, and the base stage of the PNP pipe is connected to the second end
Point, the emitter of the PNP pipe are connected to the third endpoint.
In above-mentioned short-circuit protection circuit, optionally, further includes: grid resistance, one end connection of the grid resistance
The control voltage input end, the other end connect the grid of the switching tube.
In above-mentioned short-circuit protection circuit, optionally, further includes: current-limiting resistance, one end connection of the current-limiting resistance
Second endpoint of the shutdown holding circuit, the other end connect the source electrode of the switching tube.
In above-mentioned short-circuit protection circuit, optionally, when the switching tube is NMOS tube, if default protective current value
For Io, the cut-in voltage of the NPN pipe is Uth, then it is described adjust resistance value be
In above-mentioned short-circuit protection circuit, optionally, when the switching tube is PMOS tube, if pre-set current value is
Io, the cut-in voltage of the PNP pipe is Uth, then it is described adjust resistance value be
In above-mentioned short-circuit protection circuit, optionally, further includes: the first divider resistance and the second divider resistance, it is described
For connecting power supply, the other end is grounded after second divider resistance for one end of first divider resistance；
The grid of the switching tube is connected between first divider resistance and second divider resistance.
The short-circuit protection to load equipment may be implemented in the technical solution of the utility model, not only after each generation short circuit
Have the function of have shutdown keep and re-power can recovery characteristics, also can reach the short-circuit response speed of nanosecond, it is at low cost
And long service life etc..
Detailed description of the invention
It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
Attached drawing be briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore should not be by
Regard the restriction to range as, for those of ordinary skill in the art, without creative efforts, may be used also
To obtain other relevant attached drawings according to these attached drawings.
Fig. 1 is the first structure diagram of the short-circuit protection circuit of the utility model embodiment 1；
Fig. 2 is the second structural schematic diagram of the short-circuit protection circuit of the utility model embodiment 1；
Fig. 3 is the structural schematic diagram of the bleeder circuit of the short-circuit protection circuit of the utility model embodiment 1；
Fig. 4 is the structural schematic diagram of the short-circuit protection circuit of the utility model embodiment 2.
Main element symbol description:
100- short-circuit protection circuit；Q1, Q1 '-switching tube；R1- adjusts resistance；R2- grid resistance；R3- current-limiting resistance；
Q2, Q2 triode of '-the first；Q3, Q3 triode of '-the second；The first divider resistance of R4-；The second divider resistance of R5-.
Specific embodiment
Hereinafter, the various embodiments of the disclosure will be described more fully.The disclosure can have various embodiments, and
It can adjust and change wherein.It should be understood, however, that: there is no disclosure protection scope is limited to specific reality disclosed herein
The intention of example is applied, but the disclosure should be interpreted as to all in the spirit and scope for covering the various embodiments for falling into the disclosure
Adjustment, equivalent and/or optinal plan.
Hereinafter, can the term " includes " used in the various embodiments of the disclosure or " may include " instruction disclosed in
Function, operation or the presence of element, and do not limit the increase of one or more functions, operation or element.In addition, such as existing
Used in the various embodiments of the disclosure, term " includes ", " having " and its cognate are meant only to indicate special characteristic, number
Word, step, operation, the combination of element, component or aforementioned item, and be understood not to exclude first one or more other
Feature, number, step, operation, element, component or aforementioned item combined presence or increase one or more features, number,
Step, operation, element, component or aforementioned item combination a possibility that.
The statement (" first ", " second " etc.) used in the various embodiments of the disclosure can be modified in various implementations
Various constituent element in example, but respective sets can not be limited into element.For example, the above statement is not intended to limit the suitable of the element
Sequence and/or importance.The above statement is only used for the purpose for differentiating an element and other elements.For example, the first user fills
It sets and indicates different user device with second user device, although the two is all user apparatus.For example, not departing from each of the disclosure
In the case where the range of kind embodiment, first element is referred to alternatively as second element, and similarly, second element is also referred to as first
Element.
It should also be noted that if a constituent element ' attach ' to another constituent element by description, it can be by the first composition member
Part is directly connected to the second constituent element, and " connection " third can form between the first constituent element and the second constituent element
Element.On the contrary, when a constituent element " being directly connected to " is arrived another constituent element, it will be appreciated that in the first constituent element
And second third constituent element is not present between constituent element.
The term used in the various embodiments of the disclosure is used only for the purpose of describing specific embodiments and not anticipates
In the various embodiments of the limitation disclosure.Unless otherwise defined, otherwise all terms used herein (including technical term and
Scientific term) there is contain identical with the various normally understood meanings of embodiment one skilled in the art of the disclosure
Justice.The term (term such as limited in the dictionary generally used) be to be interpreted as have in the related technical field
The identical meaning of situational meaning and Utopian meaning or meaning too formal will be interpreted as having, unless this
It is clearly defined in disclosed various embodiments.
Embodiment 1
Fig. 1 is please referred to, the present embodiment proposes a kind of short-circuit protection circuit 100, can be used for electric signal and power output
Short-circuit protection prevents from damaging electrical equipment etc. because of short circuit.The short-circuit protection circuit 100 is described in detail below.
As shown in Figure 1, the short-circuit protection circuit 100 includes switching tube Q1, shutdown holding circuit and adjusting resistance R1.Its
In, the one control voltage input end Input of grid connection of the switching tube Q1, source electrode connects described one end for adjusting resistance R1,
Drain electrode is then as load connecting pin Output for connecting load.
The first end point 1 of the shutdown holding circuit connects the grid of the switching tube Q1, and the second endpoint 2 connects described open
The source electrode of pipe Q1 is closed, third endpoint 3 connects the other end for adjusting resistance R1.
The other end for adjusting resistance R1 is for being grounded or connecting power supply.Wherein, Fig. 1 illustrates only electric when adjusting
Hinder the structural schematic diagram of the short-circuit protection circuit 100 when R1 is grounded.
Exemplarily, by the on or off of control switch pipe, the on-off of the supply access of controllable load controls
The connection status of power supply and load.When load occur short circuit when, the switching tube automatically shut down and turn off holding circuit into
The lock state for entering switching tube shutdown, will load and disconnect immediately with power supply, therefore circuit enters short-circuit protection state.And work as
When the correct work of load, the switching tube is in the conductive state, and shutdown holding circuit is in non-locking state, thus circuit do not enter it is short
Road protection.
In the present embodiment, above-mentioned control voltage input end is for accessing a control voltage, to realize switch tube Q1's
Grid carries out voltage control, and then realizes the on or off control of switch tube Q1.Due to using different types of switching tube
Q1, the metal-oxide-semiconductor (NMOS tube) of metal-oxide-semiconductor (PMOS tube) or N-channel if any P-channel, turn-on condition is not also identical, therefore the control
The value of voltage can accordingly be set according to actual needs.
Exemplarily, the cut-in voltage V of switching tube Q1 is obtained from the service manual of the model of selected switching tube Q1TH
Voltage rating V between gate-to-sourceGSIf the VGSValue range be [- V, V], then it is described control voltage u high level
Value range is VTH≤ u≤V, and its low level value range is-V≤u≤VTH。
In the present embodiment, the drain electrode of switching tube Q1 is as load connecting pin, and for connecting load, source electrode is then through toning
Economize on electricity resistance R1 after be grounded or connection power supply, be specifically grounded or connect power supply can according to the type of the switching tube Q1 actually used come
It determines.It is appreciated that " ground connection " in the present embodiment refers to the low potential reference end for being connected to circuit.For example, if negative with power supply
Extremely low potential reference end, then should " ground connection " i.e. finger power cathode.
Exemplarily, if switching tube Q1 uses PMOS tube, source electrode is connected to circuit after adjusting resistance R1
Power supply is grounded after drain electrode connection load.If switching tube Q1 uses NMOS tube, source electrode is after adjusting resistance R1
Ground connection, and its drain electrode is connected to positive pole after overload.
In the present embodiment, which is mainly used for immediately turning off switch when short circuit occurs for the load of access
Pipe Q1, and the off state of switch tube Q1 is locked, so that switching tube Q1 will not two when short-circuit reason is eliminated
Secondary conducting, re-powers again after power cutoff, and circuit can just restore to work normally.It can prevent switching tube Q1 from turning off in this way
After be interfered and turn-on and turn-off phenomenon repeatedly occur, thus can be improved switching tube Q1 service life and entire circuit
Service life etc..
Wherein, which includes that a PNP pipe and a NPN are managed, when switching tube Q1 uses different types of metal-oxide-semiconductor
When, the composed shutdown holding circuit of the two triodes is different from switching tube Q1, the adjusting connection type of resistance R1.This implementation
Example mainly by taking switching tube Q1 is using NMOS tube as an example, is illustrated the internal structure of the shutdown holding circuit.
As shown in Fig. 2, the shutdown holding circuit includes the first triode Q2 and the two or three when switching tube Q1 is NMOS tube
Pole pipe Q3, wherein the first triode Q2 is PNP pipe, and the second triode Q3 is NPN pipe.Specifically, the collector of the PNP pipe connects
It is connected to the base stage of NPN pipe, and the collector of NPN pipe is then connected to the base stage of PNP pipe.The emitter of the PNP pipe is connected to shutdown
The first end point 1 of holding circuit, the base stage of NPN pipe are connected to the second endpoint 2, and the emitter of NPN pipe is connected to third endpoint 3.
Optionally, the adjusting resistance R1 is related with preset protective current value, and specific value can be according to actual set
Current protection point accordingly determine.Exemplarily, when switching tube Q1 is NMOS tube, if pre-set current value is Io, the two or three
The cut-in voltage of pole pipe Q3 (i.e. NPN pipe) is Uth, then it is described adjust resistance value be
Still optionally further, as shown in Figure 1, the short-circuit protection circuit 100 further include: grid resistance R2, the grid electricity
The one end for hindering R2 connects the control voltage input end to access a control voltage, and the other end connects the grid of the switching tube Q1
Pole.
It is appreciated that the input resistance of metal-oxide-semiconductor is very big, if the switching speed of metal-oxide-semiconductor is too fast, under high-pressure situations easily
Device around puncturing, and can be worked as a buffer by the upper suitable grid resistance of string, and then play protective switch pipe work
With etc..Wherein, the resistance value of the grid resistance can be determined according to metal-oxide-semiconductor actually selected etc. come specific.For example, 10K Ω can be used
The resistance of~20K Ω.
Still optionally further, short-circuit protection circuit 100 further include: current-limiting resistance R3, one end of the current-limiting resistance R3
The second endpoint 2 of the shutdown holding circuit is connected, the other end connects the source electrode of the switching tube Q1.It is appreciated that by
A suitable current-limiting resistance can enable the abundant saturation conduction of triode on the base stage string of triode in shutdown holding circuit,
To better ensure that the on-off action of triode.Wherein, the resistance value of the current-limiting resistance can be according to the triode etc. actually selected
Specifically to determine.For example, the resistance of 1K Ω~10K Ω can be used.
Still optionally further, as shown in figure 3, the short-circuit protection circuit 100 further include: the first divider resistance R4 and second point
One end of piezoresistance R5, the first divider resistance R4 are for connecting power supply, and the other end is after the second divider resistance R5
Ground connection, the grid of the switching tube Q1 is between the first divider resistance R4 and the second divider resistance R5.If this is short
It includes grid resistance R2 in circuit 100 that road, which is protected, then the switching tube Q1 can be connected to described the after grid resistance R2
Between one divider resistance R4 and the second divider resistance R5.It is appreciated that the first divider resistance R4 and the second divider resistance
R5 may make up a bleeder circuit, and by adjusting the two divider resistances, the voltage after partial pressure can be accessed to the grid of switching tube, with
The control voltage of access is set to be suitable for different applications.
The course of work of the short-circuit protection circuit 100 is illustrated below, as shown in Fig. 2, when switching tube Q1 is NMOS
Guan Shi, the first triode Q2 for turning off holding circuit is PNP pipe, and the second triode Q3 is NPN pipe, and loads and be located at power supply
Between VCC and switching tube Q1.
(a) after circuit powers on, the grid of switching tube Q1 can access the control electricity of a high level after grid resistance R2
Pressure, switching tube Q1 is connected at this time, and the drain electrode of switching tube Q1 is low level, thus electric current from power supply after overload, pass through
Switching tube Q1 and adjusting resistance R1 return to ground, to form a circuit.
(b) when loading normal work, i.e., when short circuit does not occur for circuit, the electric current flowed through at this time is normal, adjusts resistance R1
The voltage at both ends can be less than the conducting voltage of NPN pipe, therefore NPN pipe is not turned on, and PNP pipe can not also be connected.
(c) when short circuit occurs for load, or when the load excessive of access, the electric current flowed through at this time becomes larger suddenly, causes
The voltage for adjusting the both ends resistance R1 can be greater than the conducting voltage of NPN pipe, therefore NPN pipe is connected.It is then mentioned after the conducting of NPN pipe for PNP pipe
For driving signal is connected, and then it is also switched on PNP pipe, the voltage of the grid of switching tube Q1 is pulled down to ground connection at this time.Then, it opens
Pipe Q1 shutdown is closed, circuit forms open circuit, that is, enters guard mode.Further, since PNP pipe conducting after again provide trigger signal to
NPN pipe, is thusly-formed circulation, i.e., NPN manages an available lasting Continuity signal after PNP pipe is connected, without adjusting
The lasting triggering of the branch pressure voltage of economize on electricity resistance R1, so PNP pipe and the state of NPN pipe can lock.
(d) then, if short-circuit reason is eliminated, since NPN pipe and the PNP pipe of shutdown holding circuit form state locking, therefore
Switching tube Q1 secondary will not be connected, and after which after circuit re-powers, interlocked relationship is released, circuit can restore to work normally.
It is appreciated that conducting and off state by utilizing semiconductor devices, the short circuit that circuit not only may be implemented are protected
Shield, and make protection response very fast, it can reach nanosecond other response time.
Technical solution through this embodiment has following technical effect that
1. the short-circuit protection circuit has restorability, i.e., when short circuit occurs, circuit normal cutoff, and energy after power supply is restarted
Resume work, solves the problems, such as that existing fuse must be replaced after fusing；
2. the switching tube and triode due to use are semiconductor devices, the short-circuit response time is short, therefore can disconnect electricity rapidly
Road, and the danger such as explosion, spark will not be generated；
3. the shutdown holding circuit when a short circuit occurs, being made of two triodes can be after switching tube shutdown, locking electricity
The open-circuit condition on road, and after carrying out power supply and restarting, release the conducting of self-locking state and restoring circuit.By self-locking function,
The service life etc. of switching tube can be improved especially under high current in the turn-on and turn-off state that can prevent switching tube from entering repeatedly；
4. the shutdown holding circuit when short circuit occurs, being made of two triodes will be connected, due to leading for triode
Logical internal resistance is small, therefore the power consumption generated also very little；
5. by the resistance value parameter etc. for adjusting resistance different size of current specification can be formed, i.e., settable difference
Current protection point, to make the short-circuit protection circuit meet different application scenarios, and easy to operate.
Embodiment 2
The present embodiment also proposes a kind of short-circuit protection circuit 100, and place unlike the embodiments above is, the present embodiment
Switching tube Q1 ' is PMOS tube, and the first triode Q2 ' in the shutdown holding circuit is NPN pipe, and the second triode Q3 ' is PNP
Pipe.
Specifically, as shown in figure 4, when switching tube Q1 ' is PMOS tube, the current collection of the PNP pipe in the shutdown holding circuit
Pole is connected to the base stage of NPN pipe, and the collector of the NPN pipe is then connected to the base stage of PNP pipe.The emitter of the NPN pipe is connected to
The first end point 1 of holding circuit is turned off, the base stage of PNP pipe is connected to the second endpoint 2, and the emitter of PNP pipe is connected to third end
Point 3.
As shown in figure 4, the first triode Q2 ' of the shutdown holding circuit is NPN pipe when switching tube Q1 ' is PMOS tube,
Second triode Q3 ' is PNP pipe, and loads and be located at after switching tube Q1 ', below to the worked of the short-circuit protection circuit 100
Journey is illustrated.
(a) after circuit powers on, the grid of switching tube Q1 ' can access a low level control electricity after grid resistance R2
Pressure, switching tube Q1 ' is connected at this time, and the drain electrode of switching tube Q1 ' is high level, thus electric current from power supply overregulated resistance R1 and
Switching tube Q1 ' passes through load and returns to ground, to form a circuit.
(b) when loading normal work, i.e., when short circuit does not occur for circuit, the electric current in the circuit is normal at this time, adjusts resistance
The voltage at the both ends R1 will be less than the conducting voltage of PNP pipe, therefore PNP pipe is not turned on, and PNP pipe can not also be connected.
(c) when short circuit occurs for load, or when the load excessive of access, the electric current in the circuit becomes larger suddenly at this time, leads
The voltage for adjusting the both ends resistance R1 is caused to will be greater than the conducting voltage of PNP pipe, therefore PNP pipe is connected, and mentions after PNP pipe conducting to NPN pipe
For driving signal, and then NPN pipe is also switched on, and the voltage of the grid of switching tube Q1 ' is pulled to power supply VCC at this time.Then, it switchs
Pipe Q1 ' shutdown, circuit form open circuit, that is, enter guard mode.Further, since NPN pipe conducting after again provide trigger signal to
PNP pipe is thusly-formed circulation, i.e. the available lasting Continuity signal of PNP pipe after NPN pipe is connected, without adjusting
The lasting triggering of the branch pressure voltage of economize on electricity resistance R1, so the on state of NPN pipe and PNP pipe can lock.
(d) then, if short-circuit reason is eliminated, since NPN pipe and the PNP pipe of shutdown holding circuit form state locking, therefore
Switching tube Q1 ' secondary will not be connected, and after which after circuit re-powers, interlocked relationship is released, circuit can restore to work normally.
Wherein, the parameter of each resistance value in this present embodiment is chosen, can accordingly sets according to actual needs.It is exemplary
Ground, when switching tube Q1 is PMOS tube, if pre-set current value is Io, the cut-in voltage of the second triode Q3 ' (i.e. PNP pipe) is
Uth, then it is described adjust resistance R1 value beIt is appreciated that the option in above-described embodiment 1 is equally applicable to this implementation
Example, therefore this will not be detailed here.
It will be appreciated by those skilled in the art that the accompanying drawings are only schematic diagrams of a preferred implementation scenario, module in attached drawing or
Process is not necessarily implemented necessary to the utility model.
It will be appreciated by those skilled in the art that the module in device in implement scene can be described according to implement scene into
Row is distributed in the device of implement scene, can also be carried out corresponding change and is located at the one or more dresses for being different from this implement scene
In setting.The module of above-mentioned implement scene can be merged into a module, can also be further split into multiple submodule.
Above-mentioned the utility model serial number is for illustration only, does not represent the superiority and inferiority of implement scene.Disclosed above is only this
Several specific implementation scenes of utility model, still, the utility model is not limited to this, any those skilled in the art's energy
Think of variation should all fall into the protection scope of the utility model.
Claims (8)
1. a kind of short-circuit protection circuit characterized by comprising switching tube, shutdown holding circuit and adjusting resistance；
The one control voltage input end of grid connection of the switching tube, source electrode connect described one end for adjusting resistance, and drain electrode is used for
Connection load；
The first end point of the shutdown holding circuit connects the grid of the switching tube, and the second endpoint connects the source of the switching tube
Pole, third endpoint connect the other end for adjusting resistance；
The other end for adjusting resistance is for being grounded or connecting power supply.
2. short-circuit protection circuit according to claim 1, which is characterized in that the shutdown holding circuit includes a PNP pipe
It is managed with a NPN, the collector of the PNP pipe connects the base stage of the NPN pipe, and the collector of the NPN pipe connects the PNP pipe
Base stage；
When the switching tube is NMOS tube, the other end for adjusting resistance is for being grounded；The emitter of the PNP pipe connects
To the first end point, the base stage of the NPN pipe is connected to second endpoint, and the emitter of the NPN pipe is connected to described
Third endpoint.
3. short-circuit protection circuit according to claim 2, which is characterized in that described when the switching tube is PMOS tube
The other end of resistance is adjusted for connecting the power supply；
The emitter of the NPN pipe is connected to the first end point, and the base stage of the PNP pipe is connected to second endpoint, institute
The emitter for stating PNP pipe is connected to the third endpoint.
4. short-circuit protection circuit according to claim 1, which is characterized in that further include: grid resistance, the grid resistance
One end connect the control voltage input end, the other end connects the grid of the switching tube.
5. short-circuit protection circuit according to claim 1, which is characterized in that further include: current-limiting resistance, the current-limiting resistance
One end connect the second endpoint of the shutdown holding circuit, the other end connects the source electrode of the switching tube.
6. short-circuit protection circuit according to claim 2, which is characterized in that when the switching tube is NMOS tube, if in advance
If protective current value is Io, the cut-in voltage of the NPN pipe is Uth, then it is described adjust resistance value be
7. short-circuit protection circuit according to claim 3, which is characterized in that when the switching tube is PMOS tube, if in advance
If current value is Io, the cut-in voltage of the PNP pipe is Uth, then it is described adjust resistance value be
8. short-circuit protection circuit according to claim 1, which is characterized in that further include: the first divider resistance and second point
Piezoresistance, for connecting power supply, the other end is grounded after second divider resistance for one end of first divider resistance,
The grid of the switching tube is connected between first divider resistance and second divider resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920460776.XU CN209545129U (en) | 2019-04-02 | 2019-04-02 | A kind of short-circuit protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920460776.XU CN209545129U (en) | 2019-04-02 | 2019-04-02 | A kind of short-circuit protection circuit |
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| CN209545129U true CN209545129U (en) | 2019-10-25 |
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| CN201920460776.XU Expired - Fee Related CN209545129U (en) | 2019-04-02 | 2019-04-02 | A kind of short-circuit protection circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110928205A (en) * | 2019-12-05 | 2020-03-27 | 三一汽车制造有限公司 | Power control system, power control device and fire engine |
| CN111030654A (en) * | 2019-11-29 | 2020-04-17 | 山东航天电子技术研究所 | Solid-state power controller |
-
2019
- 2019-04-02 CN CN201920460776.XU patent/CN209545129U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN111030654A (en) * | 2019-11-29 | 2020-04-17 | 山东航天电子技术研究所 | Solid-state power controller |
| CN110928205A (en) * | 2019-12-05 | 2020-03-27 | 三一汽车制造有限公司 | Power control system, power control device and fire engine |
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Granted publication date: 20191025 Termination date: 20210402 |