CN110244682A - A kind of circuit and method of vehicle electronic device separation of software and hardware control shutdown - Google Patents
A kind of circuit and method of vehicle electronic device separation of software and hardware control shutdown Download PDFInfo
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- CN110244682A CN110244682A CN201810189560.4A CN201810189560A CN110244682A CN 110244682 A CN110244682 A CN 110244682A CN 201810189560 A CN201810189560 A CN 201810189560A CN 110244682 A CN110244682 A CN 110244682A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0208—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the configuration of the monitoring system
- G05B23/0213—Modular or universal configuration of the monitoring system, e.g. monitoring system having modules that may be combined to build monitoring program; monitoring system that can be applied to legacy systems; adaptable monitoring system; using different communication protocols
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24065—Real time diagnostics
Abstract
The present invention relates to vehicle electronic device technical fields.The invention discloses the circuits and method of a kind of control shutdown of vehicle electronic device separation of software and hardware, wherein circuit includes power switching module, time delayed turn-off module, ACC detection module and vehicle electronic device, vehicle power supply is vehicle electronic device power supply by power switching module, the input of time delayed turn-off module terminates ACC signal, the control terminal of the output termination power switching module of time delayed turn-off module, when there is ACC signal, time delayed turn-off module makes the control terminal of power switching module be in the first level and be connected, when there is no ACC signal, time delayed turn-off module makes the control terminal of power switching module be in second electrical level and turn off after delay a period of time, the input of the ACC detection module terminates ACC signal, the output end of the ACC detection module connects the input terminal of the main control module of vehicle electronic device, The main control module of the vehicle electronic device correspondingly controls the vehicle electronic device switching on and shutting down according to the testing result of ACC detection module.
Description
Technical field
The invention belongs to vehicle electronic device technical fields, more particularly to a kind of vehicle electronic device separation of software and hardware control
Make the circuit and method of shutdown.
Background technique
Vehicle electronic device, such as vehicle-mounted multimedia display screen, in the utilization on automobile, the power switch of power supply is controlled
Signal is generally all controlled by the ACC signal on vehicle, and when car key goes to ACC ON, ACC signal will have voltage jump,
Then vehicle electronic device by internal ACC detection circuit, will inform that core cpu system carries out powering on for equipment.Pass through ACC
Power on and outage detection, core cpu system carry out equipment switching on and shutting down control, the power on/off of power supply is realized, to meet vehicle
The requirement of the low quiescent current of electronic equipment is carried, general vehicle-mounted quiescent current, which all obtains, is less than 5mA, but sometimes due to system etc. is each
Kind reason, if the general supply not to front end powers off, this quiescent current is often unable to satisfy to be wanted less than 5mA
It asks.Mode in practice through shutting down frequently with single cpu software control or dual processors software control realizes that equipment shutdown is disconnected
Electricity, but it sometimes appear that the probabilistic abnormal crash problem of CPU, since the total power supply of equipment is controlled by CPU itself, CPU is dead
It will lead to the problem of vehicle electronic device can not shut down after machine；Also some equipment directly reserve a hardware switch, directly carry out
Power-off is controlled without CPU software and is shut down, and this mode will will lead to the regular powered-off fault bring memory of memory and damage
Bad, final equipment can not start.
Summary of the invention
The purpose of the present invention is to provide a kind of circuits of vehicle electronic device separation of software and hardware control shutdown and method to use
To solve the above problem.
To achieve the above object, a kind of the technical solution adopted by the present invention are as follows: vehicle electronic device separation of software and hardware control
The circuit of shutdown, including power switching module, time delayed turn-off module, ACC detection module and vehicle electronic device, vehicle power supply are logical
Power switching module is crossed as vehicle electronic device power supply, the input of the time delayed turn-off module terminates ACC signal, and the delay is closed
The control terminal of the output termination power switching module of disconnected module, when there is ACC signal, time delayed turn-off module makes power switching module
Control terminal be in the first level and be connected, when there is no ACC signal, time delayed turn-off module delay a period of time after open power supply
The control terminal for closing module is in second electrical level and turns off, and the input of the ACC detection module terminates ACC signal, the ACC detection
The output end of module connects the input terminal of the main control module of vehicle electronic device, the main control module of the vehicle electronic device according to
The testing result of ACC detection module correspondingly controls the vehicle electronic device switching on and shutting down.
Further, the time delayed turn-off module includes NPN triode Q1, NPN triode Q2, NPN triode Q3, PNP
Triode Q4 and charging capacitor C3, the base stage of the NPN triode Q1 connect ACC signal, emitter ground connection, and collector is sequentially connected in series
Charging capacitor C3 and resistance R6 connects vehicle power supply, and the base series resistor R3 of the PNP triode Q4 connects the collection of NPN triode Q1
The emitter of node between electrode and charging capacitor C3, the PNP triode Q4 connects between charging capacitor C3 and resistance R6
Node, the collector series resistance R8 of the PNP triode Q4 connects the base stage of NPN triode Q2, while series resistance R7 is grounded,
The base series resistor R9 of the NPN triode Q2 is grounded, the emitter ground connection of the NPN triode Q2, the NPN triode
The collector of Q2 connects the base stage of NPN triode Q3, and resistance R10 and R11 series connection are followed by between vehicle power supply and ground, the resistance
Node between R10 and R11 connects the base stage of NPN triode Q3, the emitter ground connection of the NPN triode Q3, tri- pole NPN
The collector of pipe Q3 connects the control terminal of power switching module.
Further, the time delayed turn-off module further includes the first filter circuit, and first filter circuit includes electricity
The anode series resistance R1 for hindering R1, resistance R2, capacitor C1, capacitor C2 and diode D1, the diode D1 meets ACC signal, institute
The negative terminal for stating diode D1 connects the base stage of NPN triode Q1, between the first terminating resistor R1 and diode D1 of the capacitor C1
Node, the other end ground connection, the resistance R2 and capacitor C2 parallel connection are followed by between the base stage and ground of NPN triode Q1.
Further, the time delayed turn-off module further includes zener diode D4, and the negative terminal of the zener diode D4 connects
Node between charging capacitor C3 and resistance R6, the positive ending grounding of the zener diode D4.
Further, the time delayed turn-off module further includes resistance R4 and capacitor C4, the resistance R4 and capacitor C4 string
It is in parallel with zener diode D4 after connection.
Further, the power switching module includes NMOS tube Q5, capacitor C5, diode D3 and zener diode D5,
The drain electrode of the NMOS tube Q5 connects vehicle power supply, and the source electrode of the NMOS tube Q5 connects the power end of vehicle electronic device, is vehicle-mounted
Power electronic equipment, the grid of the NMOS tube Q5 are the control terminal of power switching module, connect the collector of NPN triode Q3,
The anode of the diode D3 connects vehicle power supply, and the negative terminal series resistance R13 of the diode D3 connects the negative of zener diode D5
End, the positive ending grounding of the zener diode D5, the node between the resistance R13 and zener diode D5 connect NMOS tube Q5's
Grid, the capacitor C5 are in parallel with zener diode D5 after connecting with resistance R14.
It further, further include DC-DC converter, the source electrode of the input termination NMOS tube Q5 of the DC-DC converter,
The output end of the DC-DC converter connects the power end of vehicle electronic device.
Further, further include voltage-multiplying circuit, the voltage-multiplying circuit include diode D6, diode D2, resistance R12 and
Capacitor C6, the end the SW series capacitance C6 of the DC-DC converter connect the anode of diode D6, the negative terminal series connection of the diode D6
Resistance R12 connects the grid of NMOS tube Q5, and the negative node terminated between capacitor C6 and diode D6 of the diode D2 is described
The input terminal of the positive termination DC-DC converter of diode D2.
It further, further include front-end filtering circuitry, the front-end filtering circuitry is arranged on the output end of vehicle power supply.
The invention also discloses a kind of methods of vehicle electronic device separation of software and hardware control shutdown, include the following steps:
A. when there is ACC signal, power switching module is connected, vehicle power supply is by power switching module to vehicle electronics
The main control module of equipment power supply, vehicle electronic device controls vehicle electronic device normal boot-strap；
B. when not having ACC signal, the main control module control vehicle electronic device shutdown of vehicle electronic device enters low function
After consumption mode, power switching module is closed, disconnects vehicle power supply as vehicle electronic device power supply.
Advantageous effects of the invention:
Circuit structure of the present invention is simple, it is easy to accomplish, low cost using convenience, and has low quiescent current and realization
Software, hardware separation shutdown control, guarantee that CPU has time enough to save current status data under normal shutdown, prevents memory
When exception, which occur, in regular powered-off fault bring memory corruption and CPU can not carry out software shutdown, equipment also can be normal
The advantages that carrying out hardware shutdown.
Detailed description of the invention
Fig. 1 is the circuit diagram of the specific embodiment of the invention.
Specific embodiment
Now in conjunction with the drawings and specific embodiments, the present invention is further described.
The invention discloses a kind of methods of vehicle electronic device separation of software and hardware control shutdown, include the following steps:
A. when there is ACC signal, power switching module is connected, vehicle power supply is by power switching module to vehicle electronics
The main control module of equipment power supply, vehicle electronic device controls vehicle electronic device normal boot-strap；
B. when not having ACC signal, the main control module control vehicle electronic device shutdown of vehicle electronic device enters low function
After consumption mode, power switching module is closed, disconnects vehicle power supply as vehicle electronic device power supply.
Fig. 1 show the circuit of the vehicle electronic device separation of software and hardware control shutdown for realizing the above method, including
Power switching module, time delayed turn-off module 1, ACC detection module 2 and vehicle electronic device, in this specific embodiment, vehicle electronics
Equipment illustrates by taking vehicle-mounted multimedia display screen as an example, but not limited to this.Vehicle-mounted multimedia display screen include main control module 3 and
The liquid crystal display 4 controlled by main control module 3 and other functional modules can specifically refer to the prior art, this is no longer described in detail.
In this specific implementation, main control module 3 is core cpu system, inside there is MCU, has audio-video processing function, contains electricity
The combinational circuits such as source control IC, DDR3, EMMC, WIFI, bluetooth, GPS, operate under Android platform in practice.
Vehicle power supply is that vehicle electronic device is powered by power switching module, and in this specific embodiment, vehicle power supply is
The output end BATT of vehicular power-bottle, vehicular power-bottle connects core cpu system 3 by power switching module, supplies for core cpu system 3
Electricity, while being powered by the control of core cpu system 3 to liquid crystal display 4 and other functional modules.
In this specific embodiment, the output end BATT of vehicular power-bottle is equipped with front-end filtering circuitry 6, for vehicular power-bottle
Output voltage is filtered and protects, and LC filtering or common mode filtering, anti-reverse diode, big function are included in front-end filtering circuitry 6
The devices such as rate TVS pipe, are specifically referred to the prior art, this is no longer described in detail.
The input of the time delayed turn-off module 1 terminates ACC signal, and the output termination power of the time delayed turn-off module 1 is opened
The control terminal of module is closed, when there is ACC signal, time delayed turn-off module 1 makes the control terminal of power switching module be in the first level
And be connected, when not having ACC signal, time delayed turn-off module 1 is in the control terminal of power switching module after delay a period of time
Second electrical level and turn off, the input of the ACC detection module 2 terminates ACC signal, and the output end of the ACC detection module 2 picks up
The input terminal of the core cpu system 3 of electronic equipment is carried, the core cpu system 3 of the vehicle electronic device detects mould according to ACC
The testing result of block 2 correspondingly controls the vehicle electronic device switching on and shutting down, i.e. software switch machine, specifically, when software shuts down, it is real
Border Android in exits the associated process under being currently running, and saves related data, while controlling the power-off of correlation module and grasping
Make.
In this specific embodiment, the time delayed turn-off module 1 includes NPN triode Q1, NPN triode Q2, NPN triode
Q3, PNP triode Q4 and charging capacitor C3, the base stage of the NPN triode Q1 connect ACC signal, emitter ground connection, collector according to
Secondary serial connection charge capacitor C3 and resistance R6 connects the output end VCC of front-end filtering circuitry 6, the base series of the PNP triode Q4
Resistance R3 connects the node between the collector of NPN triode Q1 and charging capacitor C3, and the emitter of the PNP triode Q4, which connects, to be filled
The collector series resistance R8 of node between capacitor C3 and resistance R6, the PNP triode Q4 connects the base of NPN triode Q2
Pole, while series resistance R7 is grounded, the base series resistor R9 ground connection of the NPN triode Q2, the hair of the NPN triode Q2
Emitter grounding, the collector of the NPN triode Q2 connect the base stage of NPN triode Q3, and resistance R10 and R11 series connection are followed by connecing
Between the output end VCC and ground of front-end filtering circuitry, the node between the resistance R10 and R11 connects the base of NPN triode Q3
Pole, the emitter ground connection of the NPN triode Q3, the collector of the NPN triode Q3 connect the control terminal of power switching module.
In this specific embodiment, the time delayed turn-off module 1 further includes the first filter circuit, for carrying out to ACC signal
Filtering processing, first filter circuit includes resistance R1, resistance R2, capacitor C1, capacitor C2 and diode D1, the diode
The anode series resistance R1 of D1 connects ACC signal, and the negative terminal of the diode D1 meets the base stage of NPN triode Q1, the capacitor C1
The first terminating resistor R1 and diode D1 between node, the other end ground connection, the resistance R2 and capacitor C2 parallel connection are followed by
Between the base stage and ground of NPN triode Q1.
In this specific embodiment, the time delayed turn-off module 1 further includes zener diode D4, the zener diode D4's
Negative terminal connects the node between charging capacitor C3 and resistance R6, the positive ending grounding of the zener diode D4, the charging capacitor
C3 is also parallel with resistance R5.
Further, in this specific embodiment, the time delayed turn-off module 1 further includes resistance R4 and capacitor C4, the electricity
It hinders in parallel with zener diode D4 after R4 and capacitor C4 connects.Resistance R4 and capacitor C4 forms filter circuit, filters out two pole of pressure stabilizing
The sharp wave signal at the end pipe D4.
In this specific embodiment, the power switching module includes NMOS tube Q5, two pole capacitor C5, diode D3 and pressure stabilizing
The drain electrode of pipe D5, the NMOS tube Q5 meet the output end VCC of front-end filtering circuitry, and the source electrode of the NMOS tube Q5 connects core cpu
The power end (power end of vehicle-mounted multimedia display screen) of system 3 is that entire vehicle mounted multimedia is shown by core cpu system 3
Screen power supply, the grid of the NMOS tube Q5 are the control terminal of power switching module, connect the collector of NPN triode Q3, described two
The negative terminal series resistance R13 of the output end VCC, the diode D3 of the positive termination front-end filtering circuitry of pole pipe D3 connect two pole of pressure stabilizing
The negative terminal of pipe D5, the positive ending grounding of the zener diode D5, the node between the resistance R13 and zener diode D5 connect
The grid of NMOS tube Q5, the capacitor C5 are in parallel with zener diode D5 after connecting with resistance R14.Capacitor C5 and resistance R14 group
At RC filter circuit, the sharp wave signal at the both ends zener diode D5 is filtered out.
In this specific embodiment, NMOS tube Q5 is high-power NMOS tube.
It further include DC-DC converter 5 in this specific embodiment, the input of the DC-DC converter 5 terminates NMOS tube Q5
Source electrode, the DC-DC converter 5 output termination core cpu system 3 power end.
It further include voltage-multiplying circuit in this specific embodiment, the voltage-multiplying circuit includes diode D6, diode D2, resistance
R12 and capacitor C6, the end the SW series capacitance C6 of the DC-DC converter 5 connect the anode of diode D6, and the diode D6's is negative
End series resistance R12 connects the grid of NMOS tube Q5, the negative section terminated between capacitor C6 and diode D6 of the diode D2
Point, the input terminal of the positive termination DC-DC converter 5 of the diode D2.
In this specific embodiment, ACC detection module 2 can be triode control detection and be also possible to optocoupler detection circuit
Deng, it specifically can be with reference to the prior art, this is no longer described in detail.
The course of work:
When there is the input of ACC signal (when i.e. car key goes to ACC ON), NPN triode Q1, NPN triode Q2 and PNP
Triode Q4 conducting, NPN triode Q3 cut-off, at this time by voltage-multiplying circuit, so that the grid voltage of NMOS tube Q5 is greater than source electrode
Voltage, so that NMOS tube Q5 is connected, vehicle power supply is powered after being converted by DC-DC converter 5 to core cpu system 3, then is passed through
Core cpu system 3 is powered to other function module (such as liquid crystal display 4)；Charging capacitor C3 is also charged to rapidly electricity simultaneously
V1 is pressed, at this time equipment normal power supply, the low level signal that core cpu system 3 also will test the output of ACC detection module 2 (has
ACC signal) so that CPU control corresponding power supply control I O mouthful be it is high, the power supply of each functional module is opened, so that equipment is normal
Start work.
When ACC signal disconnects (when car key goes to ACC OFF), NPN triode Q1 is ended, at this time charging capacitor C3
On voltage will start to discharge by the circuit that PNP triode Q4 and resistance R3 are constituted, during electric discharge, continue to PNP
Triode Q4 provides base current and maintains the conducting of PNP triode Q4, so that NPN triode Q2 is connected, NPN triode
Q3 cut-off, NMOS tube Q5 conducting, vehicle power supply continue normal supply late-class circuit, (the warp when the charge of charging capacitor C3 discharges
Cross time T2), PNP triode Q4 cut-off, so that NPN triode Q2 ends, so that NPN triode Q3 is connected, NMOS tube Q5 is cut
Only, vehicle power supply stops supply late-class circuit, in charging capacitor C3 discharge process, because core cpu system 3 detects that ACC is examined
The high level signal (not having ACC signal) that module 2 exports is surveyed, CPU carries out the preservation of data, into shutdown process, same to time control
Making corresponding power supply and controlling O mouthfuls of I is low state, so that level power supply is all off after equipment, CPU enters low function after time T1
Consumption mode, after time T2 (i.e. delay time), all power supplys are because the cut-off of NMOS tube Q5 is cut off, the Static Electro of equipment at this time
Road reaches minimum, and 5mA is less than in practice, as long as reasonably selecting the parameter of charging capacitor C3, resistance R3 and resistance R5, so that
Time T2 is greater than time T1, that is, can reach both prevents equipment under ACC OFF state, because CPU crash causes equipment that can not shut down
The problem of, in turn ensure under normal shutdown, CPU also have time enough carry out data preservation after powered off again, prevent in
Deposit regular powered-off fault bring memory corruption.
Although specifically showing and describing the present invention in conjunction with preferred embodiment, those skilled in the art should be bright
It is white, it is not departing from the spirit and scope of the present invention defined by the appended claims, it in the form and details can be right
The present invention makes a variety of changes, and is protection scope of the present invention.
Claims (10)
1. a kind of circuit of vehicle electronic device separation of software and hardware control shutdown, it is characterised in that: including power switching module, prolong
When shutdown module, ACC detection module and vehicle electronic device, vehicle power supply is that vehicle electronic device supplies by power switching module
Electricity, the input of the time delayed turn-off module terminate ACC signal, the output termination power switching module of the time delayed turn-off module
Control terminal, when there is ACC signal, time delayed turn-off module makes the control terminal of power switching module be in the first level and be connected, when
When there is no ACC signal, time delayed turn-off module make after delay a period of time the control terminal of power switching module be in second electrical level and
The input of shutdown, the ACC detection module terminates ACC signal, and the output end of the ACC detection module connects vehicle electronic device
The main control module of the input terminal of main control module, the vehicle electronic device is correspondingly controlled according to the testing result of ACC detection module
Make the vehicle electronic device switching on and shutting down.
2. the circuit of vehicle electronic device separation of software and hardware control shutdown according to claim 1, it is characterised in that: described
Time delayed turn-off module includes NPN triode Q1, NPN triode Q2, NPN triode Q3, PNP triode Q4 and charging capacitor C3,
The base stage of the NPN triode Q1 connects ACC signal, and emitter ground connection, collector is sequentially connected in series charging capacitor C3 and resistance R6 connects
The base series resistor R3 of vehicle power supply, the PNP triode Q4 connects between the collector of NPN triode Q1 and charging capacitor C3
Node, the emitter of the PNP triode Q4 meets the node between charging capacitor C3 and resistance R6, the PNP triode Q4
Collector series resistance R8 connect the base stage of NPN triode Q2, while series resistance R7 is grounded, the base of the NPN triode Q2
Pole series resistance R9 ground connection, the emitter ground connection of the NPN triode Q2, the collector of the NPN triode Q2 connect tri- pole NPN
The base stage of pipe Q3, resistance R10 and R11 series connection are followed by between vehicle power supply and ground, the node between the resistance R10 and R11
The base stage of NPN triode Q3, the emitter ground connection of the NPN triode Q3 are connect, the collector of the NPN triode Q3 connects power supply
The control terminal of switch module.
3. the circuit of vehicle electronic device separation of software and hardware control shutdown according to claim 2, it is characterised in that: described
Time delayed turn-off module further includes the first filter circuit, and first filter circuit includes resistance R1, resistance R2, capacitor C1, capacitor
The anode series resistance R1 of C2 and diode D1, the diode D1 connect ACC signal, and the negative terminal of the diode D1 meets NPN tri-
The base stage of pole pipe Q1, the node between the first terminating resistor R1 and diode D1 of the capacitor C1, other end ground connection, the electricity
Resistance R2 and capacitor C2 parallel connection are followed by between the base stage and ground of NPN triode Q1.
4. the circuit of vehicle electronic device separation of software and hardware control shutdown according to claim 2, it is characterised in that: described
Time delayed turn-off module further includes zener diode D4, and the negative terminal of the zener diode D4 connects between charging capacitor C3 and resistance R6
Node, the positive ending grounding of the zener diode D4.
5. the circuit of vehicle electronic device separation of software and hardware control shutdown according to claim 4, it is characterised in that: described
Time delayed turn-off module further include resistance R4 and capacitor C4, the resistance R4 and capacitor C4 series connection after it is in parallel with zener diode D4.
6. special according to the circuit of the control shutdown of vehicle electronic device separation of software and hardware described in claim 2-5 any one
Sign is: the power switching module includes NMOS tube Q5, capacitor C5, diode D3 and zener diode D5, the NMOS tube
The drain electrode of Q5 connects vehicle power supply, and the source electrode of the NMOS tube Q5 connects the power end of vehicle electronic device, supplies for vehicle electronic device
Electricity, the grid of the NMOS tube Q5 are the control terminal of power switching module, connect the collector of NPN triode Q3, the diode
The anode of D3 connects vehicle power supply, and the negative terminal series resistance R13 of the diode D3 connects the negative terminal of zener diode D5, the pressure stabilizing
The positive ending grounding of diode D5, the node between the resistance R13 and zener diode D5 connect the grid of NMOS tube Q5, the electricity
Hold in parallel with zener diode D5 after C5 connects with resistance R14.
7. the circuit of vehicle electronic device separation of software and hardware control shutdown according to claim 6, it is characterised in that: also wrap
Include DC-DC converter, the source electrode of the input termination NMOS tube Q5 of the DC-DC converter, the output end of the DC-DC converter
Connect the power end of vehicle electronic device.
8. the circuit of vehicle electronic device separation of software and hardware control shutdown according to claim 7, it is characterised in that: also wrap
Voltage-multiplying circuit is included, the voltage-multiplying circuit includes diode D6, diode D2, resistance R12 and capacitor C6, the DC-DC converter
The end SW series capacitance C6 connect the anode of diode D6, the negative terminal series resistance R12 of the diode D6 connects the grid of NMOS tube Q5
Pole, the negative node terminated between capacitor C6 and diode D6 of the diode D2, the positive termination DC-DC of the diode D2
The input terminal of converter.
9. the circuit of vehicle electronic device separation of software and hardware control shutdown according to claim 6, it is characterised in that: also wrap
Front-end filtering circuitry is included, the front-end filtering circuitry is arranged on the output end of vehicle power supply.
10. a kind of method of vehicle electronic device separation of software and hardware control shutdown, which comprises the steps of:
A. when there is ACC signal, power switching module is connected, vehicle power supply is by power switching module to vehicle electronic device
The main control module of power supply, vehicle electronic device controls vehicle electronic device normal boot-strap；
B. when not having ACC signal, the main control module control vehicle electronic device shutdown of vehicle electronic device enters low-power consumption mould
After formula, power switching module is closed, disconnects vehicle power supply as vehicle electronic device power supply.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810189560.4A CN110244682A (en) | 2018-03-08 | 2018-03-08 | A kind of circuit and method of vehicle electronic device separation of software and hardware control shutdown |
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| CN201810189560.4A CN110244682A (en) | 2018-03-08 | 2018-03-08 | A kind of circuit and method of vehicle electronic device separation of software and hardware control shutdown |
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| CN113595386A (en) * | 2021-07-02 | 2021-11-02 | 西安军陶科技有限公司 | Ideal diode circuit and power supply |
| CN115278187A (en) * | 2022-09-27 | 2022-11-01 | 深圳市橙子数字科技有限公司 | Shutdown control circuit for projector and projector device |
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| CN203151454U (en) * | 2013-01-21 | 2013-08-21 | 东莞联洲电子科技有限公司 | Vehicle-borne ACC delay shutdown circuit |
| CN203419000U (en) * | 2013-07-26 | 2014-02-05 | 重庆车旗电子科技有限公司 | Vehicle-mounted hard disk delay protection device |
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| CN103544975A (en) * | 2013-10-16 | 2014-01-29 | 上海通立信息科技有限公司 | Vehicular hard disk drive protection method |
| CN105984400A (en) * | 2015-01-30 | 2016-10-05 | 厦门雅迅网络股份有限公司 | Vehicular power supply switch device |
| CN106843442A (en) * | 2015-12-07 | 2017-06-13 | 厦门雅迅网络股份有限公司 | Vehicle mounted multimedia Low-power-consumptiodormancy dormancy device and method based on data protection |
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