CN109515350A - A kind of protection circuit - Google Patents
A kind of protection circuit Download PDFInfo
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- CN109515350A CN109515350A CN201811347996.8A CN201811347996A CN109515350A CN 109515350 A CN109515350 A CN 109515350A CN 201811347996 A CN201811347996 A CN 201811347996A CN 109515350 A CN109515350 A CN 109515350A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
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Abstract
The invention discloses a kind of protection circuits; including ACC voltage input detection branch; for exporting corresponding level signal to central processing unit, so that central processing unit, which controls controlled source according to the level signal, exports corresponding voltage according to the ACC voltage input situation of ACC voltage input port；Charging paths, after being charged by fixed power source, output high level to system main power source controlling brancher；System main power source controlling brancher, the high level of voltage and charging paths output for being exported according to controlled source, exports corresponding control signal to system main power source, with the operating status of control system main power source.The protection circuit, vehicle system normally with can ensure that standby current is up to standard under abnormal conditions.
Description
Technical field
The present invention relates to car multimedia information entertainment field, in particular to a kind of protection circuit.
Background technique
Car multimedia information system is commonly called as vehicle system.Standby current, i.e. dark current are one in the vehicle system
Item important performance indexes, the normal operation concerning automobile.After the ACC power remove of automobile, the standby current of vehicle system is answered
Less than 10mA, the generation for the hidden danger such as cause automobile not start normally to avoid serious due to consumption automobile batteries.In order to true
Specification standards can be reached by protecting standby current, that is, allow standby current to be less than 10mA, currently used technological means is to pass through correlation
Software controlled, however in the case where vehicle system exception, software design can not effectively implement above-mentioned control, thus nothing
Method ensures to control the size of standby current within 10mA.
Therefore, how to design a kind of pure hardware circuit, no matter vehicle system normally whether, can ensure that standby current reaches
Mark is those skilled in the art's technical problem urgently to be resolved.
Summary of the invention
The object of the present invention is to provide a kind of protection circuit, no matter vehicle system normally whether, which can
Ensure that standby current is up to standard.
In order to solve the above technical problems, the present invention provides a kind of protection circuits of automatic shutdown, comprising:
ACC voltage input detection branch, charging paths, system main power source controlling brancher；Wherein, the ACC voltage input
Detection branch is connected with ACC voltage input port, fixed power source, central processing unit and the charging paths respectively；The charging
Branch is connected with the fixed power source, the ACC voltage input detection branch and the system main power source controlling brancher respectively；Institute
System main power source controlling brancher is stated respectively with the fixed power source, and the charging paths, controlled source and system main power source are connected；
The ACC voltage input detection branch, for the ACC voltage input situation according to ACC voltage input port
Corresponding level signal is exported to central processing unit, so that the central processing unit is described controlled according to level signal control
Power supply exports corresponding voltage；
The charging paths, after being charged by the fixed power source, output high level to the system main power source control
Branch processed；
The system main power source controlling brancher, the voltage and the charging for being exported according to the controlled source
The high level of branch output exports corresponding control signal to the system main power source, to control the system main power source
Operating status.
Optionally, the ACC voltage input detection branch includes:
First triode, first resistor, second resistance and 3rd resistor；Wherein, the base stage of first triode with
ACC voltage input port and one end of the first resistor are connected, the other end of the first resistor and the fixation
The first common end after power supply and the second resistance are in parallel with the 3rd resistor is connected；The current collection of first triode
The second common end and the central processing unit after pole is in parallel with the 3rd resistor with the second resistance are connected, and described first
The emitter of triode is grounded.
Optionally, the charging paths include:
4th resistance, the 5th resistance, first diode and preset quantity capacitor；Wherein, the electricity of the preset quantity
Hold parallel with one another, and the first common end is connected with the anode of one end of the 4th resistance and the first diode, and second is public
End ground connection altogether；The other end of 4th resistance is connected with the fixed power source, the cathode of the first diode and described the
One end of five resistance is connected, and the other end of the 5th resistance is connected with the collector of first triode.
Optionally, the quantity of the capacitor is specially five.
Optionally, the system main power source control circuit includes:
Second diode, third diode, the 6th resistance, the 7th resistance, the 8th resistance, the second triode and single channel two
Input just with door chip；Wherein, the anode of second diode is connected with the controlled source, the yin of second diode
Pole and the single channel two input just with the first input pin of door chip, one end of the 6th resistance and the third diode
Cathode be connected；The other end of 6th resistance is grounded；The single channel two input just with the second input pin of door chip with
The anode of the first diode is connected, the input of single channel two just with the power pin of door chip and the fixed power source phase
Even, the single channel two input just with the base stage and the third diode of the output pin of door chip and second triode
Anode is connected, the collector of second triode and the enabled pin of the system main power source, one end of the 7th resistance
And one end of the 8th resistance is connected, the emitter ground connection of second triode；The other end of 7th resistance and institute
It states the input of single channel two to be just connected with the power pin of door chip, the other end ground connection of the 8th resistance.
Optionally, the system main power source control circuit further include:
Reset chip, wherein the input pin of the reset chip and the single channel two input the output just with door chip
Pin is connected, and the output pin of the reset chip is connected with the base stage of second triode.
Optionally, each resistance is Chip-R in the protection circuit, and each diode is stamp-mounting-paper diode, each capacitor
It is patch capacitor, each triode is patch triode.
Optionally, the input of single channel two is just being specially 74LVC1G cake core with door chip.
Optionally, the reset chip is specially G690L29 cake core.
Protection circuit provided by the present invention, including ACC voltage input detection branch, charging paths, system main power source control
Branch processed；Wherein, the ACC voltage input detection branch respectively with ACC voltage input port, fixed power source, central processing unit
And the charging paths are connected；The charging paths respectively with the fixed power source, the ACC voltage input detection branch and institute
System main power source controlling brancher is stated to be connected；The system main power source controlling brancher respectively with the fixed power source, charging branch
Road, controlled source and system main power source are connected；The ACC voltage input detection branch, for according to the ACC voltage input end
The ACC voltage input situation of mouth exports corresponding level signal to central processing unit, so that the central processing unit is according to
Level signal controls the controlled source and exports corresponding voltage；The charging paths, for being charged by the fixed power source
Afterwards, high level is exported to the system main power source controlling brancher；The system main power source controlling brancher, for according to described controlled
The voltage of power supply output and the high level of charging paths output, export corresponding control signal to the system
System main power source, to control the operating status of the system main power source.
It is compared to the conventional solution that standby current control is carried out by software design, protection provided by the present invention
Circuit, can use whether ACC voltage input detection branch detection ACC voltage input port has ACC voltage input, and then make
Central processor knows the current state of vehicle, and control controlled source exports corresponding voltage；Pass through system main power source controlling brancher
According to the voltage of controlled source output and the high level of charging paths output, corresponding control signal is exported to the main electricity of system
Source, with the off state of control system main power source, so that controlling standby current reaches specification standards.The protection circuit breaches biography
System software can control standby current limitation up to standard when locomotive system is normal, and no matter whether vehicle system is normal, the guarantor
Protection circuit can ensure that standby current is up to standard.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to institute in the prior art and embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of schematic diagram for protecting circuit provided by the embodiment of the present invention；
Fig. 2 is the schematic diagram that another kind provided by the embodiment of the present invention protects circuit；
Fig. 3 is the schematic diagram of another protection circuit provided by the embodiment of the present invention.
Specific embodiment
Core of the invention is to provide a kind of protection circuit, no matter vehicle system normally whether, which can
Ensure that standby current is up to standard.
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Referring to FIG. 1, Fig. 1 is a kind of schematic diagram for protecting circuit provided by the embodiment of the present invention；With reference to Fig. 1 it is found that
The protection circuit may include:
ACC voltage input detection branch 10, charging paths 20, system main power source controlling brancher 30；
Specifically, ACC voltage input detection branch 10 respectively with ACC voltage input port, fixed power source, central processing
Device, charging paths 20 are connected；So-called fixed power source, that is, uncontrolled power supply, such as: automobile batteries, voltage value are fixed and specifically may be used
It is converted into 3.3V.
ACC voltage input detection branch 10 according to the ACC voltage input situation output phase of ACC voltage input port for answering
Level signal to central processing unit so that central processing unit controls the corresponding electricity of controlled source output according to the level signal
Pressure.Specifically, ACC voltage input detection branch 10 exports accordingly when there is ACC voltage input in ACC voltage input port
Low level；On the contrary, ACC voltage input detection branch 10 is corresponding defeated when ACC voltage input port does not have ACC voltage input
High level out.So that central processing unit is according to the level height of the level signal received you can learn that the current state of vehicle is
No is standby mode, and controls controlled source and export corresponding voltage, if there is ACC voltage input in ACC voltage input port, by
The output voltage for controlling power supply is 3.3V, if ACC voltage input port does not have ACC voltage input, the output voltage of controlled source
For 0V.Certainly, the corresponding relationship of the output voltage of the ACC voltage input situation and controlled source of above-mentioned ACC voltage input port
For the corresponding relationship of vehicle system under normal circumstances, and in vehicle system exception, even if ACC voltage input port does not have ACC
Voltage input, the output voltage of controlled source are still 3.3V.
It please join Fig. 2, in a kind of specific embodiment, above-mentioned ACC voltage input detection branch 10 may include: first
Triode Q1, first resistor R1, second resistance R2 and 3rd resistor R3；Wherein, the base stage of the first triode Q1 and ACC voltage
One end of input port and first resistor R1 are connected, the other end of first resistor R1 and fixed power source and second resistance R2 with
The first common end after 3rd resistor R3 is in parallel is connected；The collector and second resistance R2 and 3rd resistor R3 of first triode Q1
The second common end and central processing unit after parallel connection are connected, the emitter ground connection of the first triode Q1.
Corresponding to foregoing circuit structure, the process which implements aforesaid operations is as follows: when
When there is ACC voltage input in ACC voltage input port, the first triode Q1 conducting, the first of second resistance R2 and 3rd resistor R3
The level of common end is low level, and the ACC voltage input detection branch 10 exports low level extremely by first common end at this time
Central processing unit；When ACC voltage input port does not have ACC voltage input, the first triode Q1 shutdown, second resistance R2 and the
The level of the first common end of three resistance R3 is got higher by low, and the ACC voltage input detection branch 10 is first public by this at this time
End exports high level to central processing unit.
Charging paths 20 respectively with fixed power source, ACC voltage input detection branch 10 and system main power source controlling brancher 30
It is connected；It is responsible for after being charged by fixed power source, exports high level to system main power source controlling brancher 30, be continuously system main power source
Controlling brancher 30 provides high level all the way and inputs.
Referring to FIG. 2, charging paths 20 may include: the 4th resistance R4, the 5th electricity in a kind of specific real-time mode
Hinder the capacitor C of R5, first diode D1 and preset quantity；Wherein, the capacitor C of preset quantity is parallel with one another, and first is public
End is connected with the anode of one end of the 4th resistance R4 and first diode D1, the second common end grounding；4th resistance R4's is another
End is connected with fixed power source, and the cathode of first diode D1 is connected with one end of the 5th resistance R5, the other end of the 5th resistance R5
It is connected with the collector of the first triode Q1.
Based on foregoing circuit structure, the process which implements aforesaid operations is as follows: in the list of first diode
To conducting under buffer action, fixed power source is charged by capacitor C of the 4th resistance R4 to each parallel connection, produces its first common end
Raw high potential, and the high potential is further led into system main power source controlling brancher 30, realize output high level to system master
The purpose of power supply controlling brancher 30.Wherein, fixed power source is by the 4th resistance R4 to the charging duration of the capacitor C charging of each parallel connection
It is corresponding with the capacitance of C number of capacitor and each capacitor C in the charging circuit.It is needed in conjunction with the practical application to charging duration,
Suitable capacitor quantity and capacitance can be set.Unique restriction is not done to this present invention, difference can be carried out according to actual needs
Opposite sex setting.
In a kind of specific embodiment, the quantity of the capacitor C in above-mentioned charging paths 20 is specially five.
Specifically, the quantity of the capacitor C in charging paths 20 is specifically configured to five, and works as each capacitor C in the present embodiment
Capacitance when being 47uF, the capacitance after the capacitor C of five 47uF is in parallel is equivalent to 235uF, and charging duration is about
120s。
System main power source controlling brancher 30 respectively with fixed power source, charging paths 20, system main power source and controlled source phase
Even；The high level that the output voltage and charging paths 20 for being mainly used for being exported according to controlled source export, exports corresponding control
Signal processed is to system main power source, with the operating status of control system main power source.
Equally referring to FIG. 2, optionally, system main power source controlling brancher 30 includes: in a kind of specific embodiment
Second diode D2, third diode D3, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8, the second triode
Q2 and single channel two input just with door chip；Wherein, the anode of the second diode D2 is connected with controlled source, the second diode D2
Cathode and single channel two input yin just with the first input pin of door chip, one end of the 6th resistance R6 and third diode D3
Extremely it is connected；The other end of 6th resistance R6 is grounded；Single channel two input just with the second input pin and first diode of door chip
The anode of D1 is connected, and the input of single channel two is just connected with the power pin of door chip with fixed power source, single channel two input just with Men Xin
The output pin of piece is connected with the anode of the base stage of the second triode Q2 and third diode D3, the collector of the second triode Q2
It is connected with the enabled pin of system main power source, one end of the 7th resistance R7 and one end of the 8th resistance R8, the second triode Q2's
Emitter ground connection；The other end of 7th resistance R7 is just being connected with the power pin of door chip with the input of single channel two, the 8th resistance R8
The other end ground connection.
Based on foregoing circuit structure, the process which implements aforesaid operations is as follows: when normal,
When ACC voltage input port does not have voltage input, the output voltage of the corresponding output of controlled source is 0V, then single channel two inputs at this time
Just with the first input pin input low level of door chip, simultaneously because charging paths 20 complete charging after, single channel two input
Just continue input high level with the second input pin of door chip, then, the single channel two inputs the output just with door chip at this time
Pin exports low level, and standby current is less than 10mA, and the second triode Q2 is not turned on, and the system main power source being attached thereto enables
The incoming level of pin is high level, and system main power source is not closed.When abnormal, there is no voltage input in ACC voltage input port
When, the output voltage of the corresponding output of controlled source is 3.3V, then the input of single channel two at this time just with the first input pin of door chip
Input high level, but due to the input of single channel two just with the second input pin input high level of door chip, so, the single channel at this time
Two inputs just export high level with the output pin of door chip, and the second triode Q2 is connected at this time, the main electricity of the system being attached thereto
The incoming level of the enabled pin in source is low level, and system main power source is closed, and standby current is still less than 10mA.To realize vehicle
Still ensure that standby current is up to standard when the machine system failure.
Wherein, the type just with door chip is inputted for above-mentioned single channel two, the present invention is not unique restriction, Ke Yigen equally
Adaptable setting is carried out according to actual needs.
Optionally, the above-mentioned input of single channel two is just being specially 74LVC1G cake core with door chip.
Specifically, the input of single channel two is just selected specifically to 74LVC1G cake core, Jin Erli with door chip in the present embodiment
Above-mentioned function is realized with the 74LVC1G cake core.
In conclusion protection circuit provided by the present invention, defeated using ACC voltage input detection branch detection ACC voltage
Whether inbound port has ACC voltage input, and then central processing unit is made to know the current state of vehicle, controls controlled source output pair
The voltage answered；By system main power source controlling brancher according to the controlled source voltage exported and the height electricity of charging paths output
It is flat, corresponding control signal is exported to system main power source, with the off state of control system main power source, to control standby current
Reach specification standards.The protection circuit breaches traditional software, and can to control standby current when locomotive system is normal up to standard
Limitation, no matter whether vehicle system is normal, which can ensure that standby current is up to standard.
On the basis of the above embodiments, optionally, system main power source controlling brancher 30 can also include: reset chip,
Wherein, the input pin of reset chip is just being connected with the output pin of door chip with the input of single channel two, the efferent duct of reset chip
Foot is connected with the base stage of the second triode Q2.
Specifically, referring to FIG. 3, Fig. 3 provides the schematic diagram of another protection circuit by the embodiment of the present invention, in conjunction with figure
3, to keep the switch of the second triode Q2 more stable and reliable, in the present embodiment, system main power source control circuit further includes reset coil
Piece, when the voltage that the input pin of reset chip inputs is greater than the threshold value of the reset chip, when being greater than 2.93V,
High level is exported after the low level of output pin output 140ms or so, and then the second triode Q2 is connected.Wherein, for upper
The type of reset chip is stated, the present invention does not do unique restriction equally, is arranged according to actual needs.
Optionally, above-mentioned reset chip is specially G690L29 cake core.
Specifically, above-mentioned reset chip is specifically as follows G690L29 cake core, and then real by the G690L29 cake core
Existing aforesaid operations.
On the basis of the various embodiments described above, optionally, each resistance is Chip-R in the protection circuit, each diode
It is stamp-mounting-paper diode, each capacitor C is patch capacitor C, and each triode is patch triode.
Specifically, to save circuit space, the performances such as circuit anti-interference are improved, in the present embodiment, in the protection circuit
Each resistance, i.e. first resistor R1, second resistance R2 etc. are all made of Chip-R.First diode D1 pipe, the second diode D2 and
Third diode D3 is stamp-mounting-paper diode, and each capacitor C is patch capacitor, and the first triode Q1 is with the second triode Q2
Patch triode.
Further, the specification of each Chip-R is specifically as follows: first resistor R1 and the 6th resistance R6 is that resistance value is 10
Kilo-ohm, resistance error precision is ± 1%, the 0402 type resistance that power is 1/16 watt；Second resistance R2 and 3rd resistor R3 are
Resistance value is 1.5 kilo-ohms, and resistance error precision is ± 5%, the 0402 type resistance that power is 1/16 watt；The electricity of 4th resistance R4 and the 8th
Resistance R8 is that resistance value is 1 megaohm, and resistance error precision is ± 5%, the 0402 type resistance that power is 1/16 watt；5th resistance R5 is
220 Europe of resistance value, resistance error precision are ± 5%, the 0805 type resistance that power is 1/8 watt；It is 47,000 that 7th resistance R7, which is resistance value,
Europe, resistance error precision are ± 1%, the 0402 type resistance that power is 1/16 watt.
Each embodiment is described in a progressive manner in specification, the highlights of each of the examples are with other realities
The difference of example is applied, the same or similar parts in each embodiment may refer to each other.
Protection circuit provided by the present invention is described in detail above.Specific case used herein is to this hair
Bright principle and embodiment is expounded, method of the invention that the above embodiments are only used to help understand and its
Core concept.It should be pointed out that for those skilled in the art, in the premise for not departing from the principle of the invention
Under, it can be with several improvements and modifications are made to the present invention, these improvement and modification also fall into the protection of the claims in the present invention
Range.
It should also be noted that, in the present specification, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes that
A little elements, but also other elements including being not explicitly listed, or further include for this process, method, article or
The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged
Except there is also other identical elements in the process, method, article or equipment for including element.
Claims (9)
1. a kind of protection circuit characterized by comprising ACC voltage input detection branch, charging paths, system main power source control
Branch processed；Wherein, the ACC voltage input detection branch respectively with ACC voltage input port, fixed power source, central processing unit
And the charging paths are connected；The charging paths respectively with the fixed power source, the ACC voltage input detection branch and institute
System main power source controlling brancher is stated to be connected；The system main power source controlling brancher is propped up with the fixed power source, the charging respectively
Road, controlled source and system main power source are connected；
The ACC voltage input detection branch, for being exported according to the ACC voltage input situation of ACC voltage input port
Corresponding level signal is to central processing unit, so that the central processing unit controls the controlled source according to the level signal
Export corresponding voltage；
The charging paths, after being charged by the fixed power source, output high level to the system main power source controls branch
Road；
The system main power source controlling brancher, the voltage and the charging paths for being exported according to the controlled source
The high level of output exports corresponding control signal to the system main power source, to control the fortune of the system main power source
Row state.
2. protection circuit according to claim 1, which is characterized in that the ACC voltage input detection branch includes:
First triode, first resistor, second resistance and 3rd resistor；Wherein, the base stage of first triode with it is described
ACC voltage input port and one end of the first resistor are connected, the other end of the first resistor and the fixed power source
And the second resistance is connected with the first common end after the 3rd resistor parallel connection；The collector of first triode with
The second common end and the central processing unit after the second resistance is in parallel with the 3rd resistor are connected, the one or three pole
The emitter of pipe is grounded.
3. protection circuit according to claim 2, which is characterized in that the charging paths include:
4th resistance, the 5th resistance, first diode and preset quantity capacitor；Wherein, the capacitor phase of the preset quantity
It is mutually in parallel, and the first common end is connected with the anode of one end of the 4th resistance and the first diode, the second common end
Ground connection；The other end of 4th resistance is connected with the fixed power source, the cathode of the first diode and the 5th electricity
One end of resistance is connected, and the other end of the 5th resistance is connected with the collector of first triode.
4. protection circuit according to claim 3, which is characterized in that the quantity of the capacitor is specially five.
5. protection circuit according to claim 4, which is characterized in that the system main power source control circuit includes:
Second diode, third diode, the 6th resistance, the 7th resistance, the 8th resistance, the second triode and single channel two input
Just with door chip；Wherein, the anode of second diode is connected with the controlled source, the cathode of second diode with
The single channel two inputs the yin just with the first input pin of door chip, one end of the 6th resistance and the third diode
Extremely it is connected；The other end of 6th resistance is grounded；The single channel two input just with the second input pin of door chip with it is described
The anode of first diode is connected, and the input of single channel two is just connected with the power pin of door chip with the fixed power source, institute
State single channel two input just with the output pin of door chip and the base stage of second triode and the anode of the third diode
It is connected, the enabled pin of the collector of second triode and the system main power source, one end of the 7th resistance and institute
The one end for stating the 8th resistance is connected, the emitter ground connection of second triode；The other end and the list of 7th resistance
The input of road two is just connected with the power pin of door chip, the other end ground connection of the 8th resistance.
6. protection circuit according to claim 5, which is characterized in that the system main power source control circuit further include:
Reset chip, wherein the input pin of the reset chip and the single channel two input the output pin just with door chip
It is connected, the output pin of the reset chip is connected with the base stage of second triode.
7. protection circuit according to claim 6, which is characterized in that each resistance is patch electricity in the protection circuit
Resistance, each diode is stamp-mounting-paper diode, and each capacitor is patch capacitor, and each triode is patch triode.
8. protection circuit according to claim 7, which is characterized in that the single channel two inputs just is specially with door chip
74LVC1G cake core.
9. protection circuit according to claim 8, which is characterized in that the reset chip is specially G690L29 cake core.
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| CN201811347996.8A CN109515350B (en) | 2018-11-13 | 2018-11-13 | Protective circuit |
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|---|---|---|---|
| CN201811347996.8A CN109515350B (en) | 2018-11-13 | 2018-11-13 | Protective circuit |
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| CN103517831A (en) * | 2011-05-12 | 2014-01-15 | 日产自动车株式会社 | Dark current cutoff device and dark current cutoff method |
| CN203078446U (en) * | 2012-12-21 | 2013-07-24 | 上海大郡动力控制技术有限公司 | Control circuit of low quiescent currents of motor control system for vehicle |
| CN203305938U (en) * | 2013-06-07 | 2013-11-27 | 北汽福田汽车股份有限公司 | Control device of vehicle quiescent current |
| CN206365090U (en) * | 2016-12-30 | 2017-07-28 | 上海小糸车灯有限公司 | It is a kind of to reduce the LED failure breaking circuit of quiescent current |
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| CN109515350B (en) | 2021-09-24 |
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