CN109861521A - Vehicle-mounted low pressure auxiliary power circuit - Google Patents
Vehicle-mounted low pressure auxiliary power circuit Download PDFInfo
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Abstract
The invention discloses a kind of vehicle-mounted low pressure auxiliary power circuit, it includes low pressure accessory power supply, power distribution module, linear voltage stabilization module, signal feedback module, controller unit and from control unit；Power distribution module is electrically connected with low pressure accessory power supply and linear voltage stabilization module respectively, and power distribution module is suitable for distributing low pressure accessory power supply voltage to linear voltage stabilization module；Linear voltage stabilization module is electrically connected with from control unit and controller unit respectively；Signal feedback module, signal feedback module are connect with the voltage input end of power distribution module and controller unit signal respectively；Controller unit, controller unit are connect with power distribution module by signal.The present invention has low-power consumption management function, effectively improve low tension battery service efficiency under actual working conditions, significantly reduce the thermal losses of linear voltage stabilization device, to prevent linear voltage stabilization device from permanent damage occurs in excess temperature under the conditions of because continuing working, the reliability of circuit work is improved.
Description
Technical field
The present invention relates to a kind of vehicle-mounted low pressure auxiliary power circuits.
Background technique
As automobile interiors electrifing degree is continuously improved, power electronic technique is in Automobile Design using increasingly
Extensively, typically, the electronic circuit of automotive interior is all to use low pressure lead-acid accumulator as its accessory power supply.In order to improve
Automotive interior low tension battery service life, needs to improve the service efficiency of accessory power supply.Therefore, how accessory power supply is directed to
Use carry out safely and reliably management and have become the key of entire automotive interior electronic system performance superiority and inferiority.It is existing vehicle-mounted
Low tension battery power supply is usually directly used in linear voltage stabilization device and carries out voltage conversion, the party by low pressure auxiliary power circuit
The advantages of method, is that its circuit design is simply easily realized, but that there are power supply service efficiencies is low, the fever of linear voltage stabilization device is excessively high
And the problems such as causing power source performance to be deteriorated.Currently, the problem low for low pressure accessory power supply service efficiency, although more existing
Method introduces low-power consumption management strategy and improves, but these methods are usually all using the electricity with low-power consumption management function
Source conversion chip carries out hardware circuit design, so that parts selection difficulty and device cost in circuit design exploitation are increased,
Problem is brought to the mass production of product.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the deficiencies of existing technologies, a kind of vehicle-mounted low pressure accessory power supply is provided
Circuit, it has low-power consumption management function, effectively improves low tension battery service efficiency under actual working conditions, greatly
Ground reduces the thermal losses of linear voltage stabilization device, to prevent linear voltage stabilization device from occurring because continuing working in excess temperature under the conditions of
Permanent damage improves the reliability of circuit work.
In order to solve the above-mentioned technical problem, the technical scheme is that a kind of vehicle-mounted low pressure auxiliary power circuit, it is wrapped
Include low pressure accessory power supply, power distribution module, linear voltage stabilization module, signal feedback module, controller unit and from control unit；Its
In,
The power distribution module is electrically connected with low pressure accessory power supply and linear voltage stabilization module respectively, the power distribution module
Suitable for distributing low pressure accessory power supply voltage to linear voltage stabilization module；
The linear voltage stabilization module is electrically connected with from control unit and controller unit respectively, and the linear voltage stabilization module is suitable for will
Low pressure accessory power supply voltage is converted to from voltage needed for control unit and controller unit；
Signal feedback module, the signal feedback module are believed with the voltage input end of power distribution module and controller unit respectively
Number connection, the signal feedback unit be suitable for acquire power distribution module voltage input end status information simultaneously feed back to control
Device unit；
Controller unit, the controller unit are connect with power distribution module by signal, and the controller unit is suitable for according to electricity
The status information control power distribution module work of the voltage input end of source distribution module.
Further, the voltage input end of the power distribution module by low pressure accessory power supply branch and ignition switch branch simultaneously
Join.
Circuit is damaged further for preventing input power to be reversely connected, low pressure accessory power supply branch road is connected with diode
D1, ignition switch branch include the ignition switch K1 and diode D2 being serially connected.
A kind of particular circuit configurations of power distribution module are further provided, the power distribution module includes two
Metal-oxide-semiconductor, multiple diodes and multiple resistance；Wherein,
The voltage input end of power distribution module is connect with the source electrode of two metal-oxide-semiconductors respectively；
The gate drive circuit of metal-oxide-semiconductor Q2 is made of resistance R3, resistance R4 and resistance R5；The output end connection two of ignition switch K1
Grade pipe D3, controller unit output end CPU_IO1 connection diode D4, composition or logic gates, with or logic gates work
For the input terminal of the gate drive circuit of metal-oxide-semiconductor metal-oxide-semiconductor Q2, to pass through the on off operating mode that controller unit controls metal-oxide-semiconductor；
The gate drive circuit of metal-oxide-semiconductor Q4 is made of resistance R6, resistance R7 and resistance R8, controller unit output end CPU_IO2
The input terminal of gate drive circuit as metal-oxide-semiconductor Q4, to control the on off operating mode of metal-oxide-semiconductor Q4 by controller unit；
The voltage that the drain electrode of two metal-oxide-semiconductors is connected to linear voltage stabilization module as the voltage output end of power distribution module is defeated
Enter end.
A kind of particular circuit configurations of signal feedback module are further provided, the signal feedback module includes three poles
Pipe, two comparators and multiple resistance；Wherein,
The output end CPU_INT1 of comparator U1 is connected to the external interrupt input terminal of controller unit, and the positive of comparator U1 is defeated
Enter end and be connected to reference voltage Vref 1, the inverting input terminal of comparator U1 is connected to low pressure auxiliary power output end, the comparison
It is under-voltage whether device U1 occurs suitable for monitoring low pressure accessory power supply, and generates interrupt trigger signal CPU_INT1 when under-voltage to notify
Controller unit handles the interrupt event in time；
The output end CPU_INT2 of comparator U2 is connected to the external interrupt input terminal of controller unit, and the positive of comparator U2 is defeated
Enter end and be connected to reference voltage Vref 2, the inverting input terminal of comparator U2 is connected to the output end of ignition switch K1, the comparison
Device U2 is suitable for whether monitors ignition switch K1 turns off, and generates interrupt trigger signal CPU_INT2 when off and carry out notification controller
Unit handles the interrupt event in time；
The emitter-base bandgap grading of triode Q1 is connected to signal ground, and the base stage of triode Q1 is connected to the output of ignition switch K1 by resistance R2
End, the collector of triode Q1 are connected to the power supply 5V_M of controller unit, the collection of triode Q1 by pull-up resistor R1
Electrode is connected to the external interrupt input terminal of controller unit as output end CPU_INT3, and the triode Q1 is suitable for monitoring point
Whether fire switch K1 is closed, and in closure generates interrupt trigger signal CPU_INT3 and carry out notification controller unit and handle this in time
Interrupt event.
A kind of particular circuit configurations of linear voltage stabilization module are further provided, the linear voltage stabilization module includes two
Linear transformation chip；Wherein,
Power distribution module output end 12V_M is connected to the input terminal of linear transformation chip U3, linear transformation chip U3 output end
5V_MCU is connected to the power input of controller unit, and linear transformation chip U3 is suitable for controller unit power supply；
Power distribution module output end 12V_S is connected to the input terminal of linear transformation chip U4, linear transformation chip U4 output end
5V_SLAVE is connected to the power input from control unit, and property conversion chip U4 is suitable for from control unit power supply.
It is each linear further for the transient response ability for the input terminal and output end for improving two linear transformation chips
The input terminal and output end of conversion chip pass through a decoupling capacitor ground connection respectively.
Further for ensuring in lower electric process, linear transformation chip output voltage can be zeroed in time, prevent from linearly turning
It changes electricity under chip output and slowly causes feed problem, it is defeated with it after the input terminal reversal connection diode of each linear transformation chip
Outlet is connected.
After above-mentioned technical proposal, low pressure is assisted electricity under the control of controller unit by the power distribution module
Source voltage is distributed to linear voltage stabilization module, the linear voltage stabilization module low pressure accessory power supply voltage is converted to from control unit again and
Voltage needed for controller unit；The status information of the voltage input end of the signal feedback module acquisition power distribution module is simultaneously anti-
It is fed to controller unit, controller unit is applicable in further according to the control power distribution module work of received status signal, the present invention
In automotive interior low tension battery accessory power supply power-supply service, relative to existing low pressure accessory power supply application circuit, the present invention
With low-power consumption management function, low tension battery service efficiency under actual working conditions is effectively improved, is greatly reduced
The thermal losses of linear voltage stabilization device, to prevent linear voltage stabilization device from occurring permanently because continuing working in excess temperature under the conditions of
Damage improves the reliability of circuit work.Meanwhile the present invention uses simple discrete circuit design, efficiently solves
The problems such as increasing type selecting difficulty and cost because using particular power source chip, and pass through control to power supply power supply order and pipe
Reason is realized for electric control in the safety of electric load circuit and low-power consumption management.
Detailed description of the invention
Fig. 1 is the functional block diagram of vehicle-mounted low pressure auxiliary power circuit of the invention；
Fig. 2 is the circuit diagram of vehicle-mounted low pressure auxiliary power circuit of the invention；
Fig. 3 is the working timing figure of vehicle-mounted low pressure auxiliary power circuit of the invention.
Specific embodiment
In order that the present invention can be more clearly and readily understood, right below according to specific embodiment and in conjunction with attached drawing
The present invention is described in further detail.
As shown in Figure 1, 2, a kind of vehicle-mounted low pressure auxiliary power circuit, it include low pressure accessory power supply, power distribution module,
Linear voltage stabilization module, signal feedback module, controller unit and from control unit；Wherein,
The power distribution module is electrically connected with low pressure accessory power supply and linear voltage stabilization module respectively, the power distribution module
Suitable for distributing low pressure accessory power supply voltage to linear voltage stabilization module；
The linear voltage stabilization module is electrically connected with from control unit and controller unit respectively, and the linear voltage stabilization module is suitable for will
Low pressure accessory power supply voltage is converted to from voltage needed for control unit and controller unit；
Signal feedback module, the signal feedback module are believed with the voltage input end of power distribution module and controller unit respectively
Number connection, the signal feedback unit be suitable for acquire power distribution module voltage input end status information simultaneously feed back to control
Device unit；
Controller unit, the controller unit are connect with power distribution module by signal, and the controller unit is suitable for according to electricity
The status information control power distribution module work of the voltage input end of source distribution module.Wherein, the output of low pressure accessory power supply
The 12V of voltage.Specifically, the signal feedback unit is used to acquire the status information of the voltage input end of power distribution module,
In fact namely for acquisition low pressure accessory power supply and its status information started switch.
As shown in Fig. 2, the voltage input end of the power distribution module is by low pressure accessory power supply branch and ignition switch branch
Road is formed in parallel.In the present embodiment, input power is reversely connected and damages circuit in order to prevent, and low pressure accessory power supply branch road connects
There is diode D1, ignition switch branch includes the ignition switch K1 and diode D2 being serially connected.Ignition switch K1, that is, low pressure is auxiliary
Help starting switch for power supply.
As shown in Fig. 2, the power distribution module includes two metal-oxide-semiconductors, multiple diodes and multiple resistance；Wherein,
The voltage input end of power distribution module is connect with the source electrode of two metal-oxide-semiconductors respectively；
The gate drive circuit of metal-oxide-semiconductor Q2 is made of resistance R3, resistance R4 and resistance R5；The output end connection two of ignition switch K1
Grade pipe D3, controller unit output end CPU_IO1 connection diode D4, composition or logic gates, with or logic gates work
For the input terminal of the gate drive circuit of metal-oxide-semiconductor metal-oxide-semiconductor Q2, to pass through the on off operating mode that controller unit controls metal-oxide-semiconductor；
The gate drive circuit of metal-oxide-semiconductor Q4 is made of resistance R6, resistance R7 and resistance R8, controller unit output end CPU_IO2
The input terminal of gate drive circuit as metal-oxide-semiconductor Q4, to control the on off operating mode of metal-oxide-semiconductor Q4 by controller unit；
The voltage that the drain electrode of two metal-oxide-semiconductors is connected to linear voltage stabilization module as the voltage output end of power distribution module is defeated
Enter end.In the present embodiment, the metal-oxide-semiconductor is enhanced P-channel metal-oxide-semiconductor.
As shown in Fig. 2, the signal feedback module includes triode, two comparators and multiple resistance；Wherein,
The output end CPU_INT1 of comparator U1 is connected to the external interrupt input terminal of controller unit, and the positive of comparator U1 is defeated
Enter end and be connected to reference voltage Vref 1, the inverting input terminal of comparator U1 is connected to low pressure auxiliary power output end, the comparison
It is under-voltage whether device U1 occurs suitable for monitoring low pressure accessory power supply, and generates interrupt trigger signal CPU_INT1 when under-voltage to notify
Controller unit handles the interrupt event in time, specifically, the threshold for triggering the interruption is adjusted by setting reference voltage Vref 1
Value；
The output end CPU_INT2 of comparator U2 is connected to the external interrupt input terminal of controller unit, and the positive of comparator U2 is defeated
Enter end and be connected to reference voltage Vref 2, the inverting input terminal of comparator U2 is connected to the output end of ignition switch K1, the comparison
Device U2 is suitable for whether monitors ignition switch K1 turns off, and generates interrupt trigger signal CPU_INT2 when off and carry out notification controller
Unit handles the interrupt event in time, specifically, the threshold value for triggering the interruption is adjusted by setting reference voltage Vref 2；
The emitter-base bandgap grading of triode Q1 is connected to signal ground, and the base stage of triode Q1 is connected to the output of ignition switch K1 by resistance R2
End, the collector of triode Q1 are connected to the power supply 5V_M of controller unit, the collection of triode Q1 by pull-up resistor R1
Electrode is connected to the external interrupt input terminal of controller unit as output end CPU_INT3, and the triode Q1 is suitable for monitoring point
Whether fire switch K1 is closed, and in closure generates interrupt trigger signal CPU_INT3 and carry out notification controller unit and handle this in time
Interrupt event.
As shown in Fig. 2, the linear voltage stabilization module includes two linear transformation chips；Wherein,
Power distribution module output end 12V_M is connected to the input terminal of linear transformation chip U3, linear transformation chip U3 output end
5V_MCU is connected to the power input of controller unit, and linear transformation chip U3 is suitable for controller unit power supply；
Power distribution module output end 12V_S is connected to the input terminal of linear transformation chip U4, linear transformation chip U4 output end
5V_SLAVE is connected to the power input from control unit, and property conversion chip U4 is suitable for from control unit power supply.
As shown in Fig. 2, in order to improve the transient response ability of the input terminal of two linear transformation chips and output end, each
The input terminal and output end of linear transformation chip pass through a decoupling capacitor ground connection respectively.In the present embodiment, linear transformation core
The input terminal of piece U3 is grounded by decoupling capacitor C1, and the output end of linear transformation chip U3 is grounded by decoupling capacitor C2, linearly
The input terminal of conversion chip U4 is grounded by decoupling capacitor C3, and the output end of linear transformation chip U4 is connect by decoupling capacitor C4
Ground.
As shown in Fig. 2, linear transformation chip output voltage can be zeroed in time in order to ensure in lower electric process, line is prevented
Property conversion chip output end under electricity slowly cause feed problem, after the input terminal of each linear transformation chip reversal connection diode with
Its output end is connected.In the present embodiment, turn after the input terminal reversal connection Schottky diode D5 of linear transformation chip U3 with linear
The output end for changing chip U3 is connected；Linear transformation chip U4 input terminal reversal connection Schottky diode D6 after with linear transformation chip
The output end of U4 is connected.
The course of work of power circuit in order to better illustrate the present invention, comes below with reference to Fig. 3 to the power circuit
Workflow is specifically described, and the course of work of entire power circuit can be divided into following section:
The section S0: power circuit is in original state, and low pressure accessory power supply 12V_AUX output voltage is 12V, at ignition switch K1
In off-state, ignition switch K1 output end voltage is zero, and controller unit output signal CPU_IO1 and CPU_IO2 are low
Level, and interrupt trigger signal CPU_INT1 and interrupt trigger signal CPU_INT3 is high level, and interrupt trigger signal
CPU_INT2 is low level, and metal-oxide-semiconductor Q2 and metal-oxide-semiconductor Q4 are in off state, and power circuit output voltage 5V_M and 5V_S are
Zero.
The section S1: power circuit is in initial start-up state, and low pressure accessory power supply 12V_AUX output voltage is 12V, igniting
Switch K1 is in closed state for the first time, and ignition switch K1 output end voltage is 12V, controller unit output signal CPU_IO1 and
CPU_IO2 is low level, and interrupt trigger signal CPU_INT1 and interrupt trigger signal CPU_INT2 is high level, interrupts touching
Signalling CPU_INT3 is low level, and ignition switch K1 output end signal gets higher diac D3 and triode Q3 by low for the first time
Conducting, so that enabled metal-oxide-semiconductor Q2 is in the conductive state, power circuit output end 5V_M voltage is 5V, on controller unit starts
Electricity；But metal-oxide-semiconductor Q4 still in off state, then power circuit output end 5V_S voltage is still zero.
The section S2: power circuit is in normal operating condition, and low pressure accessory power supply 12V_AUX output voltage is 12V, igniting
Switch K1 is in closed state, and power output end 5V_M voltage output is normal, and controller unit, which starts to execute, to be powered on and initialized
Journey, after completing peripheral hardware Initialize installation, it is that low level triggers mode, and makes to be able to achieve in outside that setting external interrupt, which triggers mode,
Disconnected response function, at this point, since the interrupt trigger signal CPU_INT3 of external interrupt input is low level signal, then controller list
Member response interrupt trigger signal CPU_INT3, and in the interrupt service program set controller unit output end CPU_IO2 to
High level, and trigger triode Q5 is connected, and then opens metal-oxide-semiconductor Q4, power circuit output end 5V_S voltage is 5V, then single from control
Member starts power up, and in controller unit and after control unit completion power-up initializing, whole system starts to operate normally.
The section S3: power circuit is in low power consumpting state, and low pressure accessory power supply 12V_AUX output voltage is 12V, and igniting is opened
K1 is closed to be in an off state, then ignition switch K1 output end voltage is zero, and interrupt trigger signal CPU_INT2 starts to be lower by height,
Controller unit is influenced in normal course of operation by external interrupt trigger signal CPU_INT2 triggering, and controller unit enters
Corresponding interrupt service routine, and high level first is set by output end CPU_IO1, guarantee that metal-oxide-semiconductor Q2 is defeated in ignition switch K1
It remains to tend to remain on after signal zero out, i.e., controller unit still powers on；Low electricity is set by output end CPU_IO2 again
Flat, so that triode Q5 and metal-oxide-semiconductor Q4 be in off state, then power circuit output end 5V_S voltage zero, i.e., other are from control
Unit starts lower electricity；Then, master controller executes dormancy instruction and enters low power consumpting state.
The section S4: power circuit is in wake-up states, and low pressure accessory power supply 12V_AUX output voltage is 12V, ignition switch
K1 is again at closed state, then ignition switch K1 output end voltage is 12V, and interrupt trigger signal CPU_INT3 starts to be become by height
Low, controller unit is influenced during Low-power-consumptiodormancy dormancy by external interrupt trigger signal CPU_INT3 triggering, controller list
Member starts to be waken up and operate normally, and enters corresponding interrupt service routine, and controller unit output end CPU_IO2 is weighed
It newly is set as high level, again trigger triode Q5 and metal-oxide-semiconductor Q4 conducting, then power circuit output end 5V_S voltage is restored to
5V, i.e., other from control unit re-power, whole system restarts to operate normally.
The section S5: power circuit is in power-down state, in actual condition, low pressure accessory power supply 12V_AUX output voltage
When lower than 8V, external interrupt trigger signal CPU_INT1 signal is lower by height, if controller unit is in normal operation shape at this time
State, controller unit will be influenced by down trigger and entered in corresponding interrupt service routine, controller unit output end
CPU_IO1 is arranged to low level, while driver being reminded to need to stop in due course due to the under-voltage event of low pressure accessory power supply occurs
And close ignition switch；If controller unit is in Low-power-consumptiodormancy dormancy state, controller unit will be influenced by down trigger and
It wakes up, and enters in corresponding interrupt service routine, while also setting low level for controller unit output end CPU_IO1；
At this point, triode Q3 and metal-oxide-semiconductor Q2 are turned off, power circuit output end 5V_M voltage zero, whole system is in power-down state.
Working principle of the present invention is as follows:
The power distribution module distributes low pressure accessory power supply voltage to linear voltage stabilization module under the control of controller unit,
The linear voltage stabilization module is again converted to low pressure accessory power supply voltage from voltage needed for control unit and controller unit；The letter
The status information of the voltage input end of number feedback module acquisition power distribution module simultaneously feeds back to controller unit, controller unit
Further according to the control power distribution module work of received status signal, the present invention is suitable for automotive interior low tension battery auxiliary electricity
Source power-supply service, relative to existing low pressure accessory power supply application circuit, the present invention has low-power consumption management function, effectively mentions
High low tension battery service efficiency under actual working conditions, significantly reduces the thermal losses of linear voltage stabilization device, thus
It prevents linear voltage stabilization device from permanent damage occurs in excess temperature under the conditions of because continuing working, improves the reliable of circuit work
Property.Meanwhile the present invention uses simple discrete circuit design, efficiently solves and increases choosing because using particular power source chip
The problems such as type difficulty and cost, and by the control and management to power supply power supply order, it realizes in the safety of electric load circuit
Electric control and low-power consumption management.
Particular embodiments described above, pair present invention solves the technical problem that, technical scheme and beneficial effects carry out
It is further described, it should be understood that the above is only a specific embodiment of the present invention, is not limited to this
Invention, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in this hair
Within bright protection scope.
Claims (8)
1. a kind of vehicle-mounted low pressure auxiliary power circuit, it is characterised in that: it includes low pressure accessory power supply, power distribution module, line
Property Voltage stabilizing module, signal feedback module, controller unit and from control unit；Wherein,
The power distribution module is electrically connected with low pressure accessory power supply and linear voltage stabilization module respectively, the power distribution module
Suitable for distributing low pressure accessory power supply voltage to linear voltage stabilization module；
The linear voltage stabilization module is electrically connected with from control unit and controller unit respectively, and the linear voltage stabilization module is suitable for will
Low pressure accessory power supply voltage is converted to from voltage needed for control unit and controller unit；
Signal feedback module, the signal feedback module are believed with the voltage input end of power distribution module and controller unit respectively
Number connection, the signal feedback unit be suitable for acquire power distribution module voltage input end status information simultaneously feed back to control
Device unit；
Controller unit, the controller unit are connect with power distribution module by signal, and the controller unit is suitable for according to electricity
The status information control power distribution module work of the voltage input end of source distribution module.
2. according to vehicle-mounted low pressure auxiliary power circuit described in claim 1, it is characterised in that: the voltage of the power distribution module
Input terminal is formed by low pressure accessory power supply branch and ignition switch branch circuit parallel connection.
3. according to vehicle-mounted low pressure auxiliary power circuit as claimed in claim 2, it is characterised in that: low pressure accessory power supply branch road connects
There is diode D1, ignition switch branch includes the ignition switch K1 and diode D2 being serially connected.
4. according to vehicle-mounted low pressure auxiliary power circuit as claimed in claim 3, it is characterised in that: the power distribution module includes two
A metal-oxide-semiconductor, multiple diodes and multiple resistance；Wherein,
The voltage input end of power distribution module is connect with the source electrode of two metal-oxide-semiconductors respectively；
The gate drive circuit of metal-oxide-semiconductor Q2 is made of resistance R3, resistance R4 and resistance R5；The output end connection two of ignition switch K1
Grade pipe D3, controller unit output end CPU_IO1 connection diode D4, composition or logic gates, with or logic gates work
For the input terminal of the gate drive circuit of metal-oxide-semiconductor metal-oxide-semiconductor Q2, to pass through the on off operating mode that controller unit controls metal-oxide-semiconductor；
The gate drive circuit of metal-oxide-semiconductor Q4 is made of resistance R6, resistance R7 and resistance R8, controller unit output end CPU_IO2
The input terminal of gate drive circuit as metal-oxide-semiconductor Q4, to control the on off operating mode of metal-oxide-semiconductor Q4 by controller unit；
The voltage that the drain electrode of two metal-oxide-semiconductors is connected to linear voltage stabilization module as the voltage output end of power distribution module is defeated
Enter end.
5. according to vehicle-mounted low pressure auxiliary power circuit as claimed in claim 4, it is characterised in that: the signal feedback module includes three
Pole pipe, two comparators and multiple resistance；Wherein,
The output end CPU_INT1 of comparator U1 is connected to the external interrupt input terminal of controller unit, and the positive of comparator U1 is defeated
Enter end and be connected to reference voltage Vref 1, the inverting input terminal of comparator U1 is connected to low pressure auxiliary power output end, the comparison
It is under-voltage whether device U1 occurs suitable for monitoring low pressure accessory power supply, and generates interrupt trigger signal CPU_INT1 when under-voltage to notify
Controller unit handles the interrupt event in time；
The output end CPU_INT2 of comparator U2 is connected to the external interrupt input terminal of controller unit, and the positive of comparator U2 is defeated
Enter end and be connected to reference voltage Vref 2, the inverting input terminal of comparator U2 is connected to the output end of ignition switch K1, the comparison
Device U2 is suitable for whether monitors ignition switch K1 turns off, and generates interrupt trigger signal CPU_INT2 when off and carry out notification controller
Unit handles the interrupt event in time；
The emitter-base bandgap grading of triode Q1 is connected to signal ground, and the base stage of triode Q1 is connected to the output of ignition switch K1 by resistance R2
End, the collector of triode Q1 are connected to the power supply 5V_M of controller unit, the collection of triode Q1 by pull-up resistor R1
Electrode is connected to the external interrupt input terminal of controller unit as output end CPU_INT3, and the triode Q1 is suitable for monitoring point
Whether fire switch K1 is closed, and in closure generates interrupt trigger signal CPU_INT3 and carry out notification controller unit and handle this in time
Interrupt event.
6. according to the vehicle-mounted low pressure auxiliary power circuit described in claim 5, it is characterised in that: the linear voltage stabilization module includes
Two linear transformation chips；Wherein,
Power distribution module output end 12V_M is connected to the input terminal of linear transformation chip U3, linear transformation chip U3 output end
5V_MCU is connected to the power input of controller unit, and linear transformation chip U3 is suitable for controller unit power supply；
Power distribution module output end 12V_S is connected to the input terminal of linear transformation chip U4, linear transformation chip U4 output end
5V_SLAVE is connected to the power input from control unit, and property conversion chip U4 is suitable for from control unit power supply.
7. according to vehicle-mounted low pressure auxiliary power circuit as claimed in claim 6, it is characterised in that: the input of each linear transformation chip
End and output end pass through a decoupling capacitor ground connection respectively.
8. according to vehicle-mounted low pressure auxiliary power circuit as claimed in claim 6, it is characterised in that: the input of each linear transformation chip
It is connected after end reversal connection diode with its output end.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910243262.3A CN109861521A (en) | 2019-03-28 | 2019-03-28 | Vehicle-mounted low pressure auxiliary power circuit |
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| CN201910243262.3A CN109861521A (en) | 2019-03-28 | 2019-03-28 | Vehicle-mounted low pressure auxiliary power circuit |
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| CN (1) | CN109861521A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110336456A (en) * | 2019-07-16 | 2019-10-15 | 赵红雁 | A kind of wake-up driving circuit of electric car low-tension supply |
| CN112087034A (en) * | 2020-09-14 | 2020-12-15 | 广东高标电子科技有限公司 | Electric vehicle power-on and power-off control method and circuit and electric vehicle |
| CN113147633A (en) * | 2021-04-13 | 2021-07-23 | 联合汽车电子有限公司 | Power distribution module and automobile body controller |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107171401A (en) * | 2017-07-04 | 2017-09-15 | 东莞市巨星电池有限公司 | A kind of pair of accessory power supply and the energy-storage system based on double accessory power supplys |
| CN107834826A (en) * | 2017-11-01 | 2018-03-23 | 中国航空无线电电子研究所 | Energy supply control module |
| CN108964245A (en) * | 2018-07-05 | 2018-12-07 | 杭州乾程弘泰电力科技有限公司 | A kind of detection of electric energy meter source and switching device |
| CN209526656U (en) * | 2019-03-28 | 2019-10-22 | 常州索维尔电子科技有限公司 | Vehicle-mounted low pressure auxiliary power circuit |
-
2019
- 2019-03-28 CN CN201910243262.3A patent/CN109861521A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107171401A (en) * | 2017-07-04 | 2017-09-15 | 东莞市巨星电池有限公司 | A kind of pair of accessory power supply and the energy-storage system based on double accessory power supplys |
| CN107834826A (en) * | 2017-11-01 | 2018-03-23 | 中国航空无线电电子研究所 | Energy supply control module |
| CN108964245A (en) * | 2018-07-05 | 2018-12-07 | 杭州乾程弘泰电力科技有限公司 | A kind of detection of electric energy meter source and switching device |
| CN209526656U (en) * | 2019-03-28 | 2019-10-22 | 常州索维尔电子科技有限公司 | Vehicle-mounted low pressure auxiliary power circuit |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110336456A (en) * | 2019-07-16 | 2019-10-15 | 赵红雁 | A kind of wake-up driving circuit of electric car low-tension supply |
| CN112087034A (en) * | 2020-09-14 | 2020-12-15 | 广东高标电子科技有限公司 | Electric vehicle power-on and power-off control method and circuit and electric vehicle |
| CN113147633A (en) * | 2021-04-13 | 2021-07-23 | 联合汽车电子有限公司 | Power distribution module and automobile body controller |
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