CN206323170U - A kind of intelligent power supply circuit for car-mounted terminal - Google Patents
A kind of intelligent power supply circuit for car-mounted terminal Download PDFInfo
- Publication number
- CN206323170U CN206323170U CN201621417352.8U CN201621417352U CN206323170U CN 206323170 U CN206323170 U CN 206323170U CN 201621417352 U CN201621417352 U CN 201621417352U CN 206323170 U CN206323170 U CN 206323170U
- Authority
- CN
- China
- Prior art keywords
- power supply
- circuit
- signal
- signals
- supply circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Electronic Switches (AREA)
Abstract
It is main to use an analog comparator and an OR gate the utility model discloses a kind of intelligent power supply circuit for car-mounted terminal, coordinate simple peripheral circuit component composition.When battery tension is less than the low pressure threshold set, other wake-up signals or power supply signal are invalid；When battery tension is higher than the low pressure threshold set, any one signal in ACC signals, RTC wake-up signals and MCU locking power supply output control signals triggers the wake-up that can be powered for terminal, when three kinds of signals all fail, then cuts off the power supply to terminal.The utility model can really avoid automobile long-time stagnation of movement, and vehicle-mounted terminal equipment exhausts accumulator electric-quantity, cause automobile can not start and damage the adverse consequences of battery；Circuit is easy to use, reduces the cost of whole vehicle-mounted terminal equipment.
Description
Technical field
The utility model is related to intelligent power supply field, more particularly to a kind of intelligent power supply circuit for car-mounted terminal.
Background technology
Powered because car-mounted terminal kind equipment generally relies on automobile storage battery, and accumulator capacity is limited, in automobile flameout
Afterwards, automobile current generator stops generating electricity and charging to battery, now requires that vehicle-mounted terminal equipment power consumption is more low better, and in vapour
Possess sleep mode during car stagnation of movement, it is to avoid automobile long-time stagnation of movement exhausts accumulator electric-quantity, cause automobile can not start and damage
The adverse consequences of bad battery, but the reduction of actually vehicle-mounted terminal equipment power consumption can be simply accomplished, it is necessary to many skills
The satisfaction of art condition.The intelligent power supply circuit of existing vehicle-mounted terminal equipment passes through to automobile equipment power supply (i.e. ACC), real-time clock
Wake-up signal (i.e. RTC) and terminal inner MCU lock the judgement of power supply three kinds of signals of output control signal to realize terminal device
Wake-up and dump, as long as this three kinds of signals have a kind of signal to trigger, you can realize the power supply to terminal works circuit, three
When planting signal whole failure, then the power supply to terminal is cut off.
The shortcoming of existing vehicle-mounted terminal equipment intelligent power supply circuit has：When battery tension drops to the low pressure threshold set
When value is following, RTC, which remains unchanged, can wake up terminal device consumption in operation accumulator electric-quantity, accumulator electric-quantity can not be avoided to consume completely
Most final result；As long as automobile connects ACC, terminal device will powered operation always, whether start but regardless of automobile, generator is
It is no to be charged for battery, untill accumulator electric-quantity exhausts.
The basic reason of above-mentioned technical disadvantages, the intelligent power supply circuit for being exactly existing vehicle-mounted terminal equipment can not be with battery
The magnitude of voltage foundation that judges whether to power for terminal as override
Utility model content
Technical problem to be solved in the utility model, exactly makes improvement, with battery to existing intelligent power supply circuit
The foundation that can magnitude of voltage judge power as terminal as override, battery tension drop to the low pressure threshold that has set with
When lower, no longer power terminal equipment is waken up, so as to be prevented effectively from the infringement that accumulator electric-quantity depletion zone comes.
To achieve these goals, the utility model uses following scheme：
A kind of intelligent power supply circuit for car-mounted terminal, including battery tension comparison circuit and trigger signal processing electricity
Road；The battery tension comparison circuit includes analog comparator U1A, threshold input voltage REF5V and battery tension
BATTERY accesses the analog comparator U1A after bleeder circuit and filter circuit respectively；The trigger signal process circuit bag
OR gate U2 is included, multichannel trigger signal accesses the OR gate U2 after respective signal receiving circuit；The OR gate U2 output signal strings
Signal all the way is merged into the analog comparator output signal after connection isolation resistance R3, the signal all the way after the merging and electricity
Die block is electrically connected.
The multichannel trigger signal includes ACC signals, RTC wake-up signals and MCU control signals；The ACC signals are received
Circuit is bleeder circuit and filter circuit；The RTC wakes up model low level useful signal, and the RTC wake-up signals are received
Circuit is logic reverse circuit.
The bleeder circuit is two resistant series partial pressures, and the filter circuit is capacitor filtering.
The analog comparator U1A models LM293.
The OR gate U2 is double positive OR gates of 2 tunnels input.
Double positive OR gate model SN74LVC2G32 of 2 tunnels input.
The reverse circuit includes a triode and pull-up resistor R6.
The triode model MMBT3904.
The threshold input voltage REF5V is the reference voltage that a high-precision magnitude of voltage is DC5.00V.
The beneficial effects of the utility model are can really to avoid automobile long-time stagnation of movement, and vehicle-mounted terminal equipment is by storage battery
Amount exhausts, and causes automobile can not start and damage the adverse consequences of battery；Circuit is easy to use, reduces whole car-mounted terminal and sets
Standby cost.
Brief description of the drawings
Fig. 1 is the utility model intelligent power supply circuit theory diagrams.
Embodiment
The utility model specific embodiment is described in detail below in conjunction with the accompanying drawings.
It is as shown in Figure 1 the utility model car-mounted terminal intelligent power supply circuit diagram, mainly there is battery tension comparison circuit
With trigger signal process circuit composition.
Battery tension comparison circuit annexation is：Threshold input voltage REF5V connection resistance R1, then series capacitance C2
With resistance R2 parallel circuit, series connection node be input to comparator U1A-pole, U1A models select LM293, hold resistance parallel circuit
The other end is grounded.Battery tension BATTERY connections are compared with being input to after the circuit of threshold input voltage REF5V same configurations
Device U1A+pole.Comparator U1A 4pin are grounded, and 8pin meets device drives voltage VDD, and electric capacity C1 is connected between VDD and ground
Strobe.
Trigger signal process circuit is main to be made up of positive OR gate U2 and Ge Lu the trigger signal receiving circuit of double 2 tunnels input.
U2 models select SN74LVC2G32.Rtc signal is input to triode Q1 base stage, and Q1 colelctor electrode connection resistance R6 is followed by
VDD, while colelctor electrode is connected to U2 1pin, Q1 emitting stages ground connection.Triode Q1 models select MMBT3904.ACC signals connect
Connected again after connecting resistance R7 one hold resistance parallel circuit (resistance R7 and electric capacity C5 parallel circuit) be grounded afterwards, series connection node input
Positive OR gate U2 2pin.MCU control signals are directly inputted to U2 5pin.U2 8pin meet VDD, and VDD meets electric capacity C4
After be grounded；U2 4pin ground connection, the 6th and 7pin connections.RTC, ACC and MCU control signal through positive OR gate U2 handle after by
U2 3pin is exported and merged after resistance R3 with comparator U1A output ends, and combined signal is conveyed to Power Module
Enable ends.
Can this power supply circuit judge the foundation that powered as terminal using battery tension value as override, in storage battery
When pressure is down to below the low pressure threshold set, no longer power terminal equipment is waken up, so as to be prevented effectively from accumulator electric-quantity
The infringement that depletion zone comes；When battery tension is higher than the low pressure threshold set, ACC signals, RTC wake-up signals and MCU controls
Any one signal triggering in signal can wake up powers for terminal, when three kinds of signals all fail, then cuts off to terminal
Power supply.
ACC signals, RTC wake-up signals and MCU control signals are construed to：
1.ACC signals (i.e. automobile equipment power supply signal)：When automobile key goes to ACC gears, by automobile storage battery electricity
Source is switched to ACC, realizes the power supply of some electrical equipments on car, such as cigar lighter, ventilation fan, light；
2.RTC wake-up signals (i.e. real-time clock waking-up signal)：Terminal is during automobile stagnation of movement dormancy, often by one
The cycle of setting, RTC will export the timing signal that a dormancy period is completed, and terminal, which is powered, to wake up completes some timings
Periodic duty, terminal power-off goes successively to resting state after the completion of work；
3.MCU control signals (i.e. terminal inner MCU locking power supplys output control signal)：After terminal wake-up, its internal MCU
Locking power supply output control signal is sent to intelligent power supply circuit, power supply circuit is remained terminal and powers, then sent clearly to RTC
Except wake-up signal order；After the completion of terminal works, MCU removes this locking power supply output control signal, and terminal power-off, which enters, stops
Dormancy state.
U1A is analog comparator, and model selects LM293, and this power supply circuit has only used one of them of LM293 to compare
Device, its act on be by its+,-two ends input voltage signal be compared, when+end input voltage be more than-end without output, when+end
Input voltage exports low level when being less than-holding；U1A is used to battery tension being compared with a reference voltage, judges electric power storage
Whether cell voltage is higher than the low pressure threshold set；Wherein, label BATTERY is battery tension, and label REF5V is one high-precision
The magnitude of voltage of degree is DC5.00V reference voltage；Resistance R1, R2, R4, R5 are respectively REF5V and BATTERY divider resistance,
For modulating, appropriate comparing voltage value is respectively 10K, 15K, 20K, 10K from model, and precision is 1%；C2, C3 are respectively
REF5V and BATTERY filter capacitor, plays a part of stable input voltage signal, and model is 105/16V；C1 is U1A's
Filter capacitor, model 104/50V；Pass through formula UBATTERY*R4/ (R4+R5)<UREF5V*R1/ (R1+R2), which is calculated, to be understood,
When battery tension is less than DC9V, U1A output low levels judge that battery tension is less than the low pressure threshold set.
U2 is double positive OR gates of 2 tunnels input, and model selects SN74LVC2G32, as long as its effect is its each road input signal
It is all the way high level to have, and its output signal is high level；ACC signals, RTC wake-up signals and MCU are locked power supply by U2 herein
Three input signals of output control signal synthesize an output signal, as long as that is, these three signals have an output high level,
U2 is output high level；C4 is U2 filter capacitor, model 104/50V.
Label ACC_SIGNAL is ACC signals, because ACC signal voltages are battery tension, to adapt to U2 OR gate
Input voltage is, it is necessary to which to its signal partial pressure, resistance R7, R8 are its divider resistance, and model is respectively 20K and 10K；C5 is ACC_
SIGNAL filter capacitor, model 105/16V；Assuming that ACC_SIGNAL voltage ranges are DC8~14V, then through resistance R7, R8
Output voltage after partial pressure is DC2.67~4.67V, it is adaptable to SN74LVC2G32.
Label RCT_INT is RTC wake-up signals, because RTC output signals are that low level effectively (exports low electricity when waking up
It is flat, usually export high level), so needing to use a NPN triode to carry out logic to its signal level before input to U2
Upset, Q1 is this effect triode, from model MMBT3904, and R6 is signal pull-up resistor, model 10K.
Label MCU_CTRL is that MCU locks power supply output control signal, is directly inputted into U2 OR gate input；Label
WAKEUP exports for the final power supply of this intelligent power supply circuit, is connected to the Enable Pin of terminal power supply module circuit；Label
VDD and GND are respectively that the working power of this intelligent power supply circuit is positive and negative, general to be powered from DC5V, rated power supply electric current
1.5mA。
Resistance R3 plays a part of isolating U1A and U2 output signals, and as U1A, without output, (i.e. battery tension is higher than and set
The low pressure threshold put) when, as long as ACC signals, RTC wake-up signals and MCU lockings power supply output control signal have one effectively,
WAKEUP is exportable high level, enabled terminals power supply module circuit；When U1A exports low level, (i.e. battery tension is less than
The low pressure threshold of setting) when, no matter then which kind of state other signals are, WAKEUP is also low level, terminal unpowered.
The beneficial effects of the utility model are：Automobile long-time stagnation of movement can really be avoided, vehicle-mounted terminal equipment is by battery
Electricity exhausts, and causes automobile can not start and damage the adverse consequences of battery；Circuit is easy to use, reduces whole car-mounted terminal
The cost of equipment.
Embodiment of the present utility model is described in detail above, but the content is only of the present utility model preferable
Embodiment, it is impossible to be considered as being used to limit practical range of the present utility model.It is all according to present utility model application scope made it is equal
Deng change, improvement or combination etc., all should still it belong within patent covering scope of the present utility model.
Claims (9)
1. a kind of intelligent power supply circuit for car-mounted terminal, it is characterised in that：Including battery tension comparison circuit and triggering
Signal processing circuit；The battery tension comparison circuit includes analog comparator U1A, threshold input voltage REF5V and electric power storage
Cell voltage BATTERY accesses the analog comparator U1A after bleeder circuit and filter circuit respectively；The trigger signal processing
Circuit includes OR gate U2, and multichannel trigger signal accesses the OR gate U2 after respective signal receiving circuit；The OR gate U2 outputs
Signal all the way is merged into the analog comparator output signal after signal series connection isolation resistance R3, the letter all the way after the merging
Number electrically connected with voltage module.
2. power supply circuit according to claim 1, it is characterised in that：The multichannel trigger signal includes ACC signals, RTC and called out
Awake signal and MCU control signals；The ACC signal receiving circuits are bleeder circuit and filter circuit；The RTC wakes up model
Low level useful signal, the RTC wake-up signals receiving circuit is logic reverse circuit.
3. power supply circuit according to claim 1 or claim 2, it is characterised in that：The bleeder circuit is two resistant series partial pressures,
The filter circuit is capacitor filtering.
4. power supply circuit according to claim 1, it is characterised in that：The analog comparator U1A models LM293.
5. power supply circuit according to claim 1, it is characterised in that：The OR gate U2 is double positive OR gates of 2 tunnels input.
6. power supply circuit according to claim 5, it is characterised in that：Double positive OR gate models of 2 tunnels input
SN74LVC2G32。
7. power supply circuit according to claim 2, it is characterised in that：The reverse circuit includes a triode and pull-up electricity
Hinder R6.
8. power supply circuit according to claim 7, it is characterised in that：The triode model MMBT3904.
9. power supply circuit according to claim 1, it is characterised in that：The threshold input voltage REF5V is one high-precision
Magnitude of voltage is DC5.00V reference voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621417352.8U CN206323170U (en) | 2016-12-22 | 2016-12-22 | A kind of intelligent power supply circuit for car-mounted terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621417352.8U CN206323170U (en) | 2016-12-22 | 2016-12-22 | A kind of intelligent power supply circuit for car-mounted terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206323170U true CN206323170U (en) | 2017-07-11 |
Family
ID=59258686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621417352.8U Expired - Fee Related CN206323170U (en) | 2016-12-22 | 2016-12-22 | A kind of intelligent power supply circuit for car-mounted terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206323170U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111301313A (en) * | 2020-02-26 | 2020-06-19 | 北京嘀嘀无限科技发展有限公司 | A protection device and on-vehicle electronic equipment for on-vehicle electronic equipment |
| CN113103919A (en) * | 2021-05-24 | 2021-07-13 | 安徽安凯汽车股份有限公司 | Electric motor coach storage battery protection system and method |
| WO2021147914A1 (en) * | 2020-01-20 | 2021-07-29 | 北京嘀嘀无限科技发展有限公司 | Low-voltage protection method and system for vehicle-mounted devices |
-
2016
- 2016-12-22 CN CN201621417352.8U patent/CN206323170U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021147914A1 (en) * | 2020-01-20 | 2021-07-29 | 北京嘀嘀无限科技发展有限公司 | Low-voltage protection method and system for vehicle-mounted devices |
| CN111301313A (en) * | 2020-02-26 | 2020-06-19 | 北京嘀嘀无限科技发展有限公司 | A protection device and on-vehicle electronic equipment for on-vehicle electronic equipment |
| CN111301313B (en) * | 2020-02-26 | 2022-05-06 | 北京嘀嘀无限科技发展有限公司 | A protection device and on-vehicle electronic equipment for on-vehicle electronic equipment |
| CN113103919A (en) * | 2021-05-24 | 2021-07-13 | 安徽安凯汽车股份有限公司 | Electric motor coach storage battery protection system and method |
| CN113103919B (en) * | 2021-05-24 | 2022-03-22 | 安徽安凯汽车股份有限公司 | Electric motor coach storage battery protection system and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206323170U (en) | A kind of intelligent power supply circuit for car-mounted terminal | |
| CN102692948B (en) | The real-time clock low power consumpting controling circuit that SOC (system on a chip) realizes | |
| CN101549673B (en) | Method and circuit for waking-up weak hybrid power entire car controller in dormant mode | |
| CN102081558B (en) | Watchdog circuit in on-board unit and on-board unit | |
| CN210101377U (en) | BMS system is awaken up to electric automobile rifle resistance that charges and takes rifle dormancy circuit | |
| CN203643779U (en) | Outage wake-up circuit of ammeter metering terminal | |
| CN201726170U (en) | Power supply with wakeup function | |
| CN205484540U (en) | Area is from recovery function's current detection module | |
| CN112332664B (en) | Low-power-consumption standby circuit method for power battery monitoring power supply of pure electric vehicle | |
| CN201142006Y (en) | Standby-mode electric power alteration awakening device | |
| CN207219123U (en) | A kind of light-operated boosting LED function circuit of solar energy | |
| CN211653439U (en) | Key awakening circuit and electronic equipment | |
| CN207955543U (en) | A kind of MCU module Low-power-consumptiodormancy dormancy circuit | |
| CN110446301A (en) | A kind of light-operated boosting LED function circuit of solar energy | |
| CN110703896A (en) | Normally open circuit for low-power SOC chip | |
| CN202661919U (en) | Real-time clock low power consumption control circuit realized by system on chip | |
| CN209562228U (en) | Electrification circuit and clock circuit | |
| CN220342303U (en) | External signal triggering power-on self-starting circuit | |
| CN204906346U (en) | Timing control chip and battery charging circuit | |
| CN206644765U (en) | 360 degree of panorama low-voltage protection circuits of automobile | |
| CN219918483U (en) | Super capacitor charging and discharging circuit | |
| CN214098215U (en) | CPU deep sleep function test circuit | |
| CN218940696U (en) | Low-power consumption dormancy awakening circuit | |
| CN110356280A (en) | Charge wake-up circuit, battery management system and electric car | |
| CN219778495U (en) | Circuit for reducing standby power consumption |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170711 Termination date: 20211222 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |