CN209692351U - A kind of car networking equipment reverse-connection preventing circuit and vehicle electronic device - Google Patents
A kind of car networking equipment reverse-connection preventing circuit and vehicle electronic device Download PDFInfo
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- CN209692351U CN209692351U CN201920484142.8U CN201920484142U CN209692351U CN 209692351 U CN209692351 U CN 209692351U CN 201920484142 U CN201920484142 U CN 201920484142U CN 209692351 U CN209692351 U CN 209692351U
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Abstract
The utility model provides a kind of car networking equipment reverse-connection preventing circuit and vehicle electronic device, reverse-connection preventing circuit includes car networking load, for the power supply and switching circuit of car networking load supplying, and wherein switching circuit includes metal-oxide-semiconductor Q1, resistance R1, resistance R2 and voltage-stabiliser tube D1；The drain of metal-oxide-semiconductor Q1 and one end of power supply connect, and source level is connect with one end of car networking load and resistance R2 respectively, and grid is connect with the other end of one end of resistance R1 and resistance R2 respectively, the other end ground connection of resistance R1；Voltage-stabiliser tube D1 is arranged in parallel with resistance R2；Switching circuit is configured to the on-off of control power supply to guarantee that car networking equipment works normally.The embodiment of the utility model switching circuit can automatically switch, to guarantee that car networking equipment works normally, will not damage because of reverse power connection.It also can protect body shear silk simultaneously, will not be damaged because of instantaneous large-current, so as to allow car networking equipment to work normally faster after the recovery of harness wrong, do not need to tear vehicle repairing open again.
Description
Technical field
The utility model relates to vehicle networking technical field, more particularly to a kind of car networking equipment reverse-connection preventing circuit and vehicle-mounted
Electronic equipment.
Background technique
Because of the risk that body harness has wrong reversed, car networking equipment needs to increase reverse connection prevention protection circuit, with protection
Car networking equipment.Traditional car networking equipment does anti-reverse protection using TVS pipe, when doing anti-reverse protection using TVS pipe, one
That there is a situation where body harnesies is reversed for denier, and TVS pipe can be reversed breakdown, and moment generates high current, and then body shear silk is burnt
It is disconnected, achieve the purpose that protect car networking equipment.So, once body harness is reversed, body shear silk will certainly be damaged, and
After the damage of body shear silk, even if car networking equipment can not work normally immediately, at this moment need after harness wrong is restored
After repairing body shear silk, car networking equipment can just work on.Usual body shear silk is arranged in car body, is carrying out
When body shear silk is repaired, it is necessary to which fuse could be replaced by tearing vehicle open, very troublesome, costly and laborious, so that car networking equipment is not
It can restore to work normally after the recovery of harness wrong, user experience is poor.
Utility model content
In view of the above problems, the utility model is proposed to overcome the above problem in order to provide one kind or at least partly solve
The certainly car networking equipment reverse-connection preventing circuit and vehicle electronic device of the above problem.
According to the one aspect of the utility model, a kind of car networking equipment reverse-connection preventing circuit, including car networking load are provided
And the power supply for the car networking load supplying, wherein the reverse-connection preventing circuit further includes switching circuit, wherein
The switching circuit includes metal-oxide-semiconductor Q1, resistance R1, resistance R2 and voltage-stabiliser tube D1；
The drain of the metal-oxide-semiconductor Q1 is connect with one end of the power supply, and source level loads respectively with the car networking and resistance
One end of R2 connects, and grid is connect with the other end of one end of the resistance R1 and resistance R2 respectively, and the resistance R1's is another
End ground connection；
The voltage-stabiliser tube D1 is arranged in parallel with the resistance R2；
The switching circuit is configured to the on-off of control power supply, to guarantee that car networking equipment works normally.
Optionally, the switching circuit, is additionally configured to:
When body harness connection is correct, supply voltage is exported and is born to the car networking by the metal-oxide-semiconductor Q1 conducting
It carries；
When body harness is reversed, the metal-oxide-semiconductor Q1 cut-off disconnects supply voltage and car networking load.
Optionally, the metal-oxide-semiconductor Q1 includes diode-built-in, wherein anode and the cathode difference of the diode-built-in
It is connect with the drain of the metal-oxide-semiconductor and source level, for realizing one-way conduction；
When body harness connection is correct, the diode current flow, drain of the supply voltage from the metal-oxide-semiconductor Q1
Input, the source level of the metal-oxide-semiconductor Q1 is conducting to via the diode-built-in, then divide it via the resistance R2 and resistance R1
After be grounded, the partial pressure on the resistance R2 is the voltage between the source level and grid of the metal-oxide-semiconductor Q1, and meets the metal-oxide-semiconductor
The turn-on condition of Q1, the MOS pipe Q1 conducting；
When body harness is reversed, supply voltage can be inverted, and the diode cut-off, electric current is in turn from the electricity
Resistance R1 flows to the source level of the metal-oxide-semiconductor Q1, and the voltage between the source level and grid of the metal-oxide-semiconductor Q1 becomes the negative resistance R2
On partial pressure, be unsatisfactory for the turn-on condition of the metal-oxide-semiconductor Q1, the metal-oxide-semiconductor Q1 cut-off.
Optionally, the reverse-connection preventing circuit further includes filter circuit, wherein the filter circuit includes inductance L1, capacitor
C1, capacitor C2；
One end of the inductance L1 is connect with one end of the power supply, the other end of the L1 of the inductance and the metal-oxide-semiconductor
Drain connection；
One end of the capacitor C1 is connect with the drain of the metal-oxide-semiconductor, other end ground connection；
The capacitor C2 is arranged in parallel with the capacitor C1；
The filter circuit is configured to filter out the interference on the power supply.
According to the other side of the utility model, a kind of vehicle electronic device is also provided, comprising: vehicle electronic device sheet
Body and above-mentioned any car networking equipment reverse-connection preventing circuit applied to the vehicle electronic device ontology.
The utility model embodiment provides a kind of car networking equipment reverse-connection preventing circuit, including car networking load and be vehicle net
The power supply of load supplying, wherein reverse-connection preventing circuit includes switching circuit, can control power supply by the disconnection and conducting of switch
On-off, so as to guarantee the normal work of car networking equipment.In the utility model embodiment switching circuit include metal-oxide-semiconductor Q1,
Resistance R1, resistance R2 and voltage-stabiliser tube D1, wherein one end of the drain of MOS pipe Q1 and circuit power connect, source level respectively with Che Lian
Net load is connected with one end of resistance R2, and grid is connect with the other end of one end of resistance R1 and resistance R2 respectively, and resistance R1
The other end ground connection.Once switch can disconnect in time, Neng Goubao after scheme body harness provided by the utility model is reversed
Car networking equipment is protected, and after body harness connects correctly, turn on automatically is switched, without tearing vehicle replacement fuse open, car networking is set
It is standby to work normally automatically.The automatic switchover that the embodiment of the utility model passes through switching circuit, it is ensured that vehicle net equipment
It works normally, taboo car networking equipment is damaged because of reverse power connection, while also can protect body shear silk, will not be because of wink
Between high current and damage, so as to body harness wrong reply after, allow faster vehicle net equipment work normally, promoted
User experience.Due to not needing to tear vehicle repairing open again, a large amount of manpower and material resources are saved, cost is also reduced.
The above description is merely an outline of the technical solution of the present invention, in order to better understand the skill of the utility model
Art means, and being implemented in accordance with the contents of the specification, and in order to allow above and other purpose, feature of the utility model
It can be more clearly understood with advantage, it is special below to lift specific embodiment of the present utility model.
According to the accompanying drawings to the detailed description of the utility model specific embodiment, those skilled in the art will be more
Add the above-mentioned and other purposes, advantages and features of clear the utility model.
Detailed description of the invention
Some specific realities of the utility model are described in detail by way of example and not limitation with reference to the accompanying drawings hereinafter
Apply example.Identical appended drawing reference denotes same or similar part or part in attached drawing.It should be appreciated by those skilled in the art that
The drawings are not necessarily drawn to scale.In attached drawing:
Fig. 1 is the car networking equipment reverse-connection preventing circuit schematic diagram according to the utility model one embodiment；
Fig. 2 is the vehicle electronic device structural schematic diagram according to the utility model one embodiment.
Specific embodiment
Exemplary embodiments of the present disclosure are described in more detail below with reference to accompanying drawings.Although showing the disclosure in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
It is limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
Completely it is communicated to those skilled in the art.
It should be noted that the feature in the utility model embodiment and preferred embodiment can be under the premise of not conflicting
It is combined with each other.
TVS pipe is a kind of high-effect protection device of diode, when its two-stage is by reversed transient state high energy impact events
When, the high impedance between its magnitude can be become Low ESR, be absorbed up to thousands of watts of surge by it with the speed of 10-12 second-time
Power makes accurate device of the voltage clamping of two-stage in a predetermined value, effective protection electronic circuit, traditional vehicle networked devices
Anti-reverse protection is done using TVS pipe, once harness is reversed, TVS pipe is reversed breakdown, and moment generates high current, by body shear
Silk is blown, and needs to tear open vehicle maintenance, very troublesome, costly and laborious.
In order to solve the above technical problems, the utility model embodiment provides a kind of vehicle net equipment reverse-connection preventing circuit, ginseng
See Fig. 1, car networking equipment reverse-connection preventing circuit includes car networking load 10 and supplies for car networking load in the utility model embodiment
The power supply 20 of electricity, reverse-connection preventing circuit further includes switching circuit 30, and switching circuit includes switching tube for ordinary circumstance, in the reality
It applies in example, switching tube is metal-oxide-semiconductor, and switching circuit 30 includes metal-oxide-semiconductor Q1, resistance R1, resistance R2 and voltage-stabiliser tube D1.Here metal-oxide-semiconductor
There are three the 3rd foot, the 2nd foot, the 1st foot pins, as shown in Figure 1, the 3rd foot is drain D, the 2nd foot is source level S, and the 1st foot is grid G.
With continued reference to Fig. 1, in the present embodiment, the drain D of metal-oxide-semiconductor Q1 is connect with one end of power supply 20, source level S respectively with vehicle
Networking load 10 is connected with one end of resistance R2, and grid G is connect with the other end of one end of resistance R1 and resistance R2 respectively, electricity
The other end ground connection of R1 is hindered, wherein voltage-stabiliser tube D1 and resistance R2 is arranged in parallel, and is used for pressure stabilizing.
The scheme of the utility model embodiment, using switching circuit switch off and on so that control power supply on-off, from
And it can guarantee the normal work of car networking equipment.In the embodiment car networking equipment reverse-connection preventing circuit include car networking load,
For the power supply and switching circuit of vehicle net load supplying, and switching circuit is metal-oxide-semiconductor switching circuit, packet in the embodiment
Metal-oxide-semiconductor Q1, resistance R1, resistance R2 and voltage-stabiliser tube D1 are included, wherein one end of the drain of metal-oxide-semiconductor Q1 and circuit power connects, source level
It is connect respectively with one end of car networking load and resistance R2, grid connects with the other end of one end of resistance R1 and resistance R2 respectively
It connects, and the other end of resistance R1 is grounded.When protection anti-reverse using scheme provided by the utility model progress car networking, once hair
After the reversed situation of raw body harness, automatic disconnection is switched, so as to protect car networking equipment, and is connect correctly in body harness
Later, switch can be with turn on automatically, and without tearing vehicle replacement fuse open, car networking equipment can work normally automatically.This is practical new
The automatic switchover that the scheme of type passes through switching circuit, it is ensured that vehicle net equipment work normally, avoid car networking equipment because
Reverse power connection and be damaged, while also can protect body shear silk, will not be damaged because of instantaneous large-current, so as in vehicle
After body harness wrong restores, vehicle net equipment is allowed to work normally faster, the user experience is improved.Due to not needing to tear vehicle open again
It repairs, a large amount of manpower and material resources can be saved, also reduce cost.
Switching circuit includes switching tube, can control conducting or the pass of switching circuit by the on or off of switching tube
Disconnected, in one preferred embodiment of the utility model, switching circuit 30 is additionally configured to when body harness connects correct, MOS
Pipe Q1 conducting exports supply voltage to car networking load 10；When body harness is reversed, metal-oxide-semiconductor Q1 cut-off, by power supply
Voltage and car networking load 10 disconnect.Here body harness connection correctly refers to that power supply just connects, i.e., positive pole is connected to MOS
The drain of pipe, circuital current flow to the 2nd foot by the 3rd foot of metal-oxide-semiconductor, and body harness is reversed to refer to that reverse power connection, supply voltage are anti-
Turn, electric current flows to the 2nd foot of metal-oxide-semiconductor via R1.In this embodiment, by the on and off of metal-oxide-semiconductor Q1 come control switch electricity
Road switches off and on, and then controls the on-off of power supply, so as to protect car networking equipment.Due to reversed in body harness
When, power supply can disconnect in time with car networking load, and it avoids body shear silk and is burnt because power supply is reversed or harness wrong, into
Without tearing vehicle maintenance open, save money laborsaving.
With continued reference to Fig. 1, in one preferred embodiment of the utility model, metal-oxide-semiconductor Q1 includes diode-built-in, wherein interior
The anode and cathode for setting diode are connect with the drain D of metal-oxide-semiconductor and source level S respectively, for realizing one-way conduction；Work as body harness
When connecting correct, diode current flow, 20 voltage of power supply is inputted from the drain D of metal-oxide-semiconductor Q1, is conducting to via diode-built-in
The source level S of metal-oxide-semiconductor Q1, then via resistance R2 and resistance R1 partial pressure after be grounded, at this point, the source level S and grid G of metal-oxide-semiconductor Q1 it
Between voltage be partial pressure on resistance R2, meet the turn-on condition of metal-oxide-semiconductor Q1, then MOS pipe Q1 is connected, and then switchs and lead
Logical, the car networking so as to export supply voltage to rear class loads 10, ensure that the normal work of car networking equipment；And work as
When body harness is reversed, diode can end, and supply voltage can also invert, and electric current flows to metal-oxide-semiconductor from resistance R1 in turn
The source level S of Q1, in this case, according to the voltage divider principle of resistance R1 and resistance R2, between the source level S and grid G of metal-oxide-semiconductor Q1
Voltage reforms into negative, that is, deletes a grade G and connect high level, is not able to satisfy the turn-on condition of metal-oxide-semiconductor Q1, and metal-oxide-semiconductor Q1 is in cut-off shape
State, thus switch OFF, and then can in time disconnect supply voltage and car networking load, avoid car networking equipment because power supply is anti-
It connects and damages, also can protect body shear silk, will not be damaged because of instantaneous large-current, so as to extensive in body harness wrong
After multiple, vehicle net equipment is allowed to work normally faster.
Switching circuit above is set as metal-oxide-semiconductor switching circuit, it is alternatively possible to set triode for switching circuit
Switching circuit, the switching tube in the transistor switching circuit are triode.
Often some is generally N-channel NMOS tube and P-channel PMOS tube to metal-oxide-semiconductor on the market, and the drain of NMOS tube connects defeated
Enter, grid connects output, and in contrast, i.e. the drain of PMOS tube connects output to PMOS tube, and grid connects input.It should be noted that this
Metal-oxide-semiconductor can choose NMOS tube in utility model embodiment, also can choose PMOS tube, can specifically be set as needed, switch
Circuit can also do corresponding adjustment, and the utility model does not limit this.
In a preferred embodiment of the utility model, referring to Fig. 1, reverse-connection preventing circuit further includes filter circuit 40, configuration
To filter out the interference on power supply, wherein filter circuit 40 includes inductance L1, capacitor C1, capacitor C2；One end of inductance L1 and power supply
One end connection, the drain of the other end of the L1 of inductance and metal-oxide-semiconductor connects；One end of capacitor C1 and the drain of metal-oxide-semiconductor connect, separately
One end ground connection；Capacitor C2 is arranged in parallel with capacitor C1.Scheme based on the present embodiment can filter out the interference on power supply, so that
DC voltage is steady.
Preferably, capacitor C1 can be polarized capacitor, and anode (anode) is connected with the anode (anode) of supply voltage
It connects, cathode (cathode) is connect with the negative terminal (cathode) or ground of supply voltage.
It should be noted that common filter circuit has a passive filtering and active power filtering two major classes, passive filtering it is main
Form has capacitor filtering, inductor filter and compound filtering, and the principal mode of active power filtering is RC filtering, and the utility model is to filtering
The concrete form of circuit is not specifically limited.
Being described below using car networking equipment reverse-connection preventing circuit provided by the embodiment of the utility model protects car networking to set
Standby detailed process, such as IRF9Z24S model metal-oxide-semiconductor, cut-in voltage are -3V, supply voltage value 12V, resistance R1 and R2
Value 10K and 100K respectively.In this embodiment, inductance L1 can be with value 100uH.
When body harness connection is correct, supply voltage 12V is switched to the 3rd foot of metal-oxide-semiconductor Q1 by inductance L1,
Using the diode-built-in of metal-oxide-semiconductor Q1, it is conducting to the 2nd foot of metal-oxide-semiconductor, using ground connection after resistance R2 and R1 partial pressure.Because
Resistance R2 and R1, which distinguish value 100K and 10K, can assign to 10V according to the voltage divider principle of resistance R1 and resistance R2 on resistance R2
The voltage of left and right so the voltage between the 2nd foot of metal-oxide-semiconductor and the 1st foot is 10V or so, and then meets the unlatching electricity of metal-oxide-semiconductor
Pressure, then metal-oxide-semiconductor is connected, so that switch conduction, supply voltage can be exported to rear class car networking apparatus of load 10, so that vehicle joins
Net equipment can work normally.
When body harness is reversed, supply voltage can be inverted, and electric current flows to metal-oxide-semiconductor Q1's from resistance R1 in turn
2nd foot, according to the voltage divider principle of resistance R1 and resistance R2, the voltage that can be calculated between the 2nd foot of MOS pipe and the 1st foot becomes
At -10V, it is not able to satisfy the turn-on condition of metal-oxide-semiconductor at this time, metal-oxide-semiconductor Q1 is in off state, and in turn by supply voltage with after
The car networking in face, which loads, to be disconnected, so that late-class circuit is protected not to be damaged, also because being in time disconnected load, so as to
Body shear silk is protected, will not be burnt because of reverse power connection.
It should be noted that above-mentioned example is only the embodiment of the utility model to be better described, but the utility model is not
As limit, it should be appreciated by those skilled in the art that the scheme of any anti-reverse protection for not damaging body shear silk, should all wrap
It is contained in the scope of the utility model.
According to the other side of the utility model, a kind of vehicle electronic device, referring to fig. 2, the utility model are also provided
Vehicle electronic device includes vehicle electronic device ontology 100 and applied to the vehicle electronic device ontology 100 in embodiment
The car networking equipment reverse-connection preventing circuit 200 of any of the above-described a embodiment.
Optionally, car networking equipment reverse-connection preventing circuit 200 is arranged in inside or outside vehicle electronic device ontology 100.
The scheme of the utility model embodiment, by switching circuit switch off and on control power supply on-off, from
And it can guarantee the normal work of car networking equipment.In the embodiment car networking equipment reverse-connection preventing circuit include car networking load,
For the power supply and switching circuit of vehicle net load supplying, and switching circuit is metal-oxide-semiconductor switching circuit, packet in the embodiment
Metal-oxide-semiconductor Q1, resistance R1, resistance R2 and voltage-stabiliser tube D1 are included, wherein one end of the drain of metal-oxide-semiconductor Q1 and circuit power connects, source level
It is connect respectively with one end of car networking load and resistance R2, grid connects with the other end of one end of resistance R1 and resistance R2 respectively
It connects, and the other end of resistance R1 is grounded.When protection anti-reverse using scheme provided by the embodiment of the utility model progress car networking,
After reversed there is a situation where body harness, automatic disconnection is switched, so as to protect car networking equipment, and in body harness
After connecing correctly, switch can be with turn on automatically, and without tearing vehicle replacement fuse open, car networking equipment can work normally automatically.This
The automatic switchover that the scheme of utility model passes through switching circuit, it is ensured that vehicle net equipment works normally, and car networking is avoided to set
It is standby to be damaged because of reverse power connection, while also can protect body shear silk, it will not be damaged because of instantaneous large-current, so as to
To allow vehicle net equipment to work normally faster, the user experience is improved after the recovery of body harness wrong.Due to not needing
It tears vehicle repairing open again, a large amount of manpower and material resources can be saved, also reduce cost.Also, filter circuit is added in reverse-connection preventing circuit
To filter out the interference on power supply, car networking equipment normal work is further ensured.
So far, although those skilled in the art will appreciate that the more of the utility model have been shown and described in detail herein
A exemplary embodiment still, still can be according to the utility model public affairs in the case where not departing from the spirit and scope of the utility model
The content opened directly determines or derives many other variations or modifications for meeting the utility model principle.Therefore, this is practical new
The range of type is understood that and regards as to cover all such other variations or modifications.
Claims (5)
1. a kind of car networking equipment reverse-connection preventing circuit including car networking load and is the power supply of the car networking load supplying,
It is characterized in that, the reverse-connection preventing circuit further includes switching circuit, wherein
The switching circuit includes metal-oxide-semiconductor Q1, resistance R1, resistance R2 and voltage-stabiliser tube D1；
The drain of the metal-oxide-semiconductor Q1 connect with one end of the power supply, source level respectively with car networking load and resistance R2
One end connection, grid are connect with the other end of one end of the resistance R1 and resistance R2 respectively, another termination of the resistance R1
Ground；
The voltage-stabiliser tube D1 is arranged in parallel with the resistance R2；
The switching circuit is configured to the on-off of control power supply, to guarantee that car networking equipment works normally.
2. car networking equipment reverse-connection preventing circuit according to claim 1, which is characterized in that
The switching circuit, is additionally configured to:
When body harness connection is correct, supply voltage is exported and is loaded to the car networking by the metal-oxide-semiconductor Q1 conducting；
When body harness is reversed, the metal-oxide-semiconductor Q1 cut-off disconnects supply voltage and car networking load.
3. car networking equipment reverse-connection preventing circuit according to claim 1 or 2, which is characterized in that
The metal-oxide-semiconductor Q1 includes diode-built-in, wherein the diode-built-in anode and cathode respectively with the metal-oxide-semiconductor
Drain connected with source level, for realizing one-way conduction；
When body harness connection is correct, the diode current flow, supply voltage is inputted from the drain of the metal-oxide-semiconductor Q1,
It is conducting to the source level of the metal-oxide-semiconductor Q1 via the diode-built-in, then is followed by via what the resistance R2 and resistance R1 was divided
Ground, the partial pressure on the resistance R2 is the voltage between the source level and grid of the metal-oxide-semiconductor Q1, and meets the metal-oxide-semiconductor Q1's
Turn-on condition, the metal-oxide-semiconductor Q1 conducting；
When body harness is reversed, supply voltage can be inverted, and the diode cut-off, electric current is in turn from the resistance R1
The source level of the metal-oxide-semiconductor Q1 is flowed to, the voltage between the source level and grid of the metal-oxide-semiconductor Q1 becomes on the negative resistance R2
Partial pressure is unsatisfactory for the turn-on condition of the metal-oxide-semiconductor Q1, the metal-oxide-semiconductor Q1 cut-off.
4. car networking equipment reverse-connection preventing circuit according to claim 1, which is characterized in that the reverse-connection preventing circuit further includes
Filter circuit, wherein the filter circuit includes inductance L1, capacitor C1, capacitor C2；
One end of the inductance L1 is connect with one end of the power supply, the leakage of the other end of the L1 of the inductance and the metal-oxide-semiconductor
Grade connection；
One end of the capacitor C1 is connect with the drain of the metal-oxide-semiconductor, other end ground connection；
The capacitor C2 is arranged in parallel with the capacitor C1；
The filter circuit is configured to filter out the interference on the power supply.
5. a kind of vehicle electronic device characterized by comprising vehicle electronic device ontology and be applied to the vehicle electronics
The described in any item car networking equipment reverse-connection preventing circuits of the claims 1-4 of apparatus body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920484142.8U CN209692351U (en) | 2019-04-10 | 2019-04-10 | A kind of car networking equipment reverse-connection preventing circuit and vehicle electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920484142.8U CN209692351U (en) | 2019-04-10 | 2019-04-10 | A kind of car networking equipment reverse-connection preventing circuit and vehicle electronic device |
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| Publication Number | Publication Date |
|---|---|
| CN209692351U true CN209692351U (en) | 2019-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920484142.8U Active CN209692351U (en) | 2019-04-10 | 2019-04-10 | A kind of car networking equipment reverse-connection preventing circuit and vehicle electronic device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111952938A (en) * | 2020-07-31 | 2020-11-17 | 深圳市信锐网科技术有限公司 | Input protection circuit and method of power supply |
| CN112072627A (en) * | 2020-09-17 | 2020-12-11 | 成都天锐星通科技有限公司 | Power supply protection circuit and electronic device |
-
2019
- 2019-04-10 CN CN201920484142.8U patent/CN209692351U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111952938A (en) * | 2020-07-31 | 2020-11-17 | 深圳市信锐网科技术有限公司 | Input protection circuit and method of power supply |
| CN112072627A (en) * | 2020-09-17 | 2020-12-11 | 成都天锐星通科技有限公司 | Power supply protection circuit and electronic device |
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