CN209149116U - A kind of any key wakeup circuit of low-power consumption - Google Patents
A kind of any key wakeup circuit of low-power consumption Download PDFInfo
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- CN209149116U CN209149116U CN201821947634.8U CN201821947634U CN209149116U CN 209149116 U CN209149116 U CN 209149116U CN 201821947634 U CN201821947634 U CN 201821947634U CN 209149116 U CN209149116 U CN 209149116U
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Abstract
The utility model discloses a kind of any key wakeup circuit of low-power consumption, it include power supply module, MCU controller, key wakeup circuit, key press detecting circuit, latching circuit and key, the key is electrically connected with the input terminal of the key wakeup circuit, the output end of the key wakeup circuit is electrically connected with the enable end of power supply module, the power output end of power supply module is electrically connected with the power input of the MCU controller, the control terminal of the MCU controller is electrically connected with the input terminal of latching circuit, the output end of the latching circuit is electrically connected with the enable end of power supply module, the key is also electrically connected with the input terminal of key press detecting circuit, the output end of the key press detecting circuit is electrically connected with the detection port of controller.The technical solution beneficial effect is to can satisfy any key wakeup, and can be realized key-press status detection, realizes extremely low stand-by power consumption, and can automatically cut off power supply when exception occurs in system.
Description
Technical field
The present invention relates to electronic technology field more particularly to a kind of any key wakeup circuits of low-power consumption.
Background technique
In many intelligence systems such as: the mode of lithium battery power supply is mostly used in AGV trolley, intelligent robot system,
If will not be able to keep extremely low power consumption under ideal case using traditional switch wake-up mode system, and system may
Power supply can not voluntarily be cut off, in order to reduce system power dissipation and under special state system can voluntarily lower electricity, need to set
Meter can satisfy the wake-up circuit under any switch.
It is most in these systems to use lithium due to being currently based on battery powered intelligence system using more and more extensive
Power resources of the battery as whole system；For important parameters such as the voltages, SOC, temperature that monitor battery, it will usually be equipped with electricity
Pond management system is monitored entire lithium battery group, and what is mostly used in power supply wake-up scheme in such systems is key
The mode of triggering wakes up battery management system work；What is mostly used due to current key wakeup mode is that key is connected on electricity
In resource loop, or in such a way that trigger etc. constitutes wake-up circuit, there is following deficiencies for the mode of such key wakeup:
1, system standby power consumption is bigger than normal, can not really extend battery working time；2, the closed state progress to key can not be realized
Detection in real time；3, operating voltage is low to be applied under the working power voltage of most of system.
Chinese patent, publication number: publication date: 107703821 A of CN on 2 16th, 2018, discloses a kind of key and calls out
The quiescent current control circuit of awake circuit, including MCU controller, power supply circuit, key circuit, JK flip-flop and enabled switch electricity
Road module；The J of JK flip-flop terminates the key into key circuit, the end K ground connection, and Q is terminated into the enabled of enabled on-off circuit module
End；Enabled on-off circuit module is accessed between the output end of power supply circuit and the vdd terminal of MCU controller；The key of key circuit
After pressing, JK flip-flop triggers enabled on-off circuit module, and the current supply circuit between power supply circuit and MCU controller, MCU is connected
Controller powers on and control button circuit.The technical solution solves the existing display system to key wakeup function and needs MCU
Controller is realized Power key-press status and is detected, and causes display system quiescent current consumption to be worth excessive technical problem, but cannot
Enough realize that any key wakeup, the voltage platform of application are slightly lower and power consumption is bigger than normal.
Chinese patent, notification number: publication date: 205353647 U of CN on June 29th, 2016, discloses a kind of low-power consumption
Key wakeup circuit, including a voltage regulator circuit and key control circuit, voltage regulator circuit include a voltage-stabilizing device, and voltage-stabilizing device has
One input, output end and the enable end for enabling the voltage-stabilizing device, external power supply end is sequentially connected in series battery supply end and voltage-stablizer
The output end of the input terminal of part, external power supply end, an I/O control terminal of MCU controller and key control circuit is separately connected
The enable end of the voltage-stabilizing device；Key control circuit is equipped with a key, can control this by key control electricity by operating the key
The level change of the output end on road, to control the enable end of the voltage-stabilizing device；MCU controller can control its I/O control terminal and exist
Level change occurs after setting time after the power-off of external power supply end, to control the enable end of the voltage-stabilizing device.The technical solution
It saves energy, extends the service life of battery supply；Structure is simple, and the device of use is few, at low cost, but can not realize any key
The voltage platform wake up, applied is slightly lower.
Utility model content
Purpose of the utility model is to solve system standby power consumption is bigger than normal, can not really extend battery working time,
Can not realize the closed state of key is detected in real time and operating voltage is low can not be applied to it is most of
Under the working power voltage of system, a kind of any key wakeup circuit of low-power consumption is proposed, which can satisfy arbitrarily
Key wakeup, and can be realized key-press status detection, realize extremely low stand-by power consumption, and when system appearance exception can be automatic
Cutting power supply.
In order to achieve the above technical purposes, the utility model proposes a kind of technical solution be: a kind of low-power consumption is arbitrarily pressed
Key wake-up circuit, include power supply module, MCU controller, key wakeup circuit, key press detecting circuit, latching circuit and by
Key, the key are electrically connected with the input terminal of the key wakeup circuit, the output end and power supply mould of the key wakeup circuit
The enable end of block is electrically connected, and the power output end of power supply module is electrically connected with the power input of the MCU controller, described
The control terminal of MCU controller is electrically connected with the input terminal of latching circuit, the output end of the latching circuit and making for power supply module
Can end electrical connection, the key also be electrically connected with the input terminal of key press detecting circuit, the output end of the key press detecting circuit and
The detection port of controller is electrically connected.In the present solution, wake-up circuit can export certain time length after external key is pressed
Enabled level, MCU controller is arrived in output power supply after power supply module obtains enabled level, defeated immediately after MCU works on power at this time
Enable signal out, so that the voltage of power supply module is kept to obtain lasting voltage output, when controller detects electric voltage exception
When can cut off enable signal, so that system be allowed to enter low power consumpting state.
The key wakeup circuit includes resistance R8, and the first end of the resistance R8 and the first end of resistance R9 are electrically connected
It connects, the first end of the resistance R9 is electrically connected with power supply module, and the second end of the resistance R8 and the first end of resistance R10 are electrically connected
Connect, the second end of the resistance R10 is electrically connected with the base stage of triode Q1, tell resistance R9 second end and the triode Q1
Emitting stage electrical connection, the first end of the resistance R10 is electrically connected with the first end of capacitor C2, the second end of the capacitor C2 and
The second end of the resistance R10 is electrically connected, and the first end of the C2 of the capacitor is electrically connected with the first end of capacitor C4, the capacitor
The second end of C4 is electrically connected with the first end of resistance R11, and the first end of the capacitor C4 is electrically connected with the first end of key, described
The second end of resistance R11 is electrically connected with the cathode terminal of diode D4, the anode tap of the diode D4 and the second end electricity of key
Connection, the cathode terminal of the diode D4 are electrically connected with the first end of resistance R12, the second end of the resistance R12 and described two
The anode tap of pole pipe D4 is electrically connected, and the first end of the resistance R12 is electrically connected with the base stage of triode Q2, the triode Q2's
Emitter is electrically connected and is grounded with the second end of the resistance R12, and the collector of the triode Q1 is with the triode Q2's
Collector electrical connection, the collector of the triode Q2 is electrically connected with the first end of capacitor C3, the second end of the capacitor C3 and
The first end of resistance R7 is electrically connected, and the second end of the resistance R7 is electrically connected with the cathode terminal of diode D3, the resistance R7's
First end is electrically connected with the first end of resistance R6, and the second end of the R6 is electrically connected with the diode D3 anode tap, the electricity
The first end for holding R6 is electrically connected with the first end of resistance R5, and the second end of the resistance R5 is electrically connected with the base stage of triode Q3,
The emitter of the triode is electrically connected and is grounded with the second end of the resistance R6, the collector and resistance of the triode Q3
The second end of R2 is electrically connected, and the first end of the resistance R2 is electrically connected with power supply module.In the present solution, three-level after pressing key pressing
Pipe Q1 is connected so that capacitor C3 charges, and Q3 is connected over the ground during C3 charging, and power switch M1, which opens VCC at this time, has voltage defeated
Out.
The latching circuit includes diode D2, and the Yang Jiduan of the diode is electrically connected with the control terminal of the MCU,
The extreme first end with resistance R3 of the diode D2 is electrically connected, the second end of the resistance R3 and the cathode of voltage-stabiliser tube DZ3
End electrical connection, the first end of the resistance R3 are electrically connected with the first end of capacitor C1, the second end of the capacitor C1 and the electricity
The second end electrical connection of R3 is hindered, the cathode terminal of the voltage-stabiliser tube DZ3 is electrically connected with the first end of resistance R4, and the of the resistance R4
Two ends are electrically connected with the anode tap of the voltage-stabiliser tube DZ3, and the first end of the resistance R4 is electrically connected with the grid of field-effect tube M2,
The drain electrode of the field-effect tube M2 is electrically connected with the second end of the resistance R2, the source electrode and the resistance of the field-effect tube M2
The second end of R4 is electrically connected and is grounded.In the present solution, having voltage output when power switch M1 opens VCC at this time, when MCU is powered on just
MCU_LOCK, which sets height, after often working keeps output voltage, and realization is self-locking, so that the voltage of power supply module is kept to be continued
Voltage output.
The key press detecting circuit includes resistance R17, and the first end of the resistance R17 is electrically connected with key, the electricity
The second end of resistance is electrically connected with voltage-stabiliser tube DZ1 cathode terminal, the anode tap of the voltage-stabiliser tube DZ1 and the cathode terminal electricity of voltage-stabiliser tube DZ2
Connection, the anode tap of the DZ2 is electrically connected with the first end of resistance R15, and the of the second end of the resistance R15 and resistance R16
One end electrical connection, the first end of the resistance R16 are electrically connected with the base stage of triode Q5, the emitter of told triode Q5 and institute
The second end electrical connection of resistance R16 is stated, the collector of the triode Q5 is electrically connected with the base stage of triode Q4, the triode
The collector of Q4 is electrically connected and is grounded with the emitter of the triode Q5, and the emitter of the triode Q4 is with resistance R13's
First end electrical connection, the second end of the resistance R13 are electrically connected with the power supply module, the first end and electricity of the resistance R13
The first end electrical connection of R14 is hindered, the second end of the resistance R14 is electrically connected with the detection port of the MCU controller.This programme
In, triode Q5 shutdown, triode Q4 shutdown, the test side of MCU controller detect high level after key disconnects, this circuit
For realizing that the state to key detects, to determine whether being that external key forces lower electricity.
The utility model has the following beneficial effects: 1, have the function of any key wakeup；2, it can satisfy up to 80V intelligence
The switch of control system wakes up；3, it can be realized and the state of key detected, can be realized simultaneously and forced with external switch
Lower electricity；4, there was only the electric current of uA rank in the case where low-power consumption, can greatly extend system operation time.
Detailed description of the invention
Fig. 1 is a kind of any key wakeup circuit structure diagram of low-power consumption of the utility model.
Fig. 2 is the key wakeup circuit diagram and self-locking electricity of a kind of any key wakeup circuit of low-power consumption of the utility model
Lu Tu.
Fig. 3 is a kind of key press detecting circuit figure of any key wakeup circuit of low-power consumption of the utility model.
Description of symbols in figure: 1- power supply module, 2-MCU controller, 3- key wakeup circuit, 4- key press detecting circuit, 5-
Latching circuit, 6- key.
Specific embodiment
For the purpose of this utility model, technical solution and advantage is more clearly understood, with reference to the accompanying drawing and implement
Example is described in further detail the utility model, it should be appreciated that the specific embodiments described herein are only this realities
The protection scope of the utility model, ability are not limited only to explain the utility model with a kind of novel most preferred embodiment
It is practical new to belong to this for domain those of ordinary skill every other embodiment obtained without making creative work
The range of type protection.
A kind of any key wakeup circuit of low-power consumption shown in embodiment 1: Fig. 1, include power supply module 1, MCU controller 2,
Key wakeup circuit 3, key press detecting circuit 4, latching circuit 5 and key 6, the key 6 and the key wakeup circuit 3
Input terminal electrical connection, the output end of the key wakeup circuit 3 are electrically connected with the enable end of power supply module 1, the electricity of power supply module 1
Source output terminal is electrically connected with the power input of the MCU controller 2, the control terminal and latching circuit 5 of the MCU controller 2
Input terminal electrical connection, the output end of the latching circuit 5 is electrically connected with the enable end of power supply module 1, the key 6 also with press
The input terminal of key detection circuit 4 is electrically connected, and the output end of the key press detecting circuit 4 is electrically connected with the detection port of controller.
In the present embodiment, wake-up circuit can export the enabled level of certain time length after external key 6 is pressed, when power supply module 1
MCU controller 2 is arrived in output power supply after obtaining enabled level, exports enable signal after MCU works on power at this time immediately, so that power supply
The voltage of module 1 keeps that enable signal can be cut off when controller detects electric voltage exception to obtain lasting voltage output,
To allow system to enter low power consumpting state.
As shown in Fig. 2, the key wakeup circuit 3 includes resistance R8, the first end of the resistance R8 is with resistance R9's
First end electrical connection, the first end of the resistance R9 are electrically connected with power supply module 1, the second end and resistance R10 of the resistance R8
First end electrical connection, the second end of the resistance R10 is electrically connected with the base stage of triode Q1, tell resistance R9 second end and
The emitting stage of the triode Q1 is electrically connected, and the first end of the resistance R10 is electrically connected with the first end of capacitor C2, the capacitor
The second end of C2 is electrically connected with the second end of the resistance R10, the first end of the C2 of the capacitor and the first end electricity of capacitor C4
Connection, the second end of the capacitor C4 is electrically connected with the first end of resistance R11, and the of the first end of the capacitor C4 and key 6
One end electrical connection, the second end of the resistance R11 is electrically connected with the cathode terminal of diode D4, the anode tap of the diode D4 and
The second end of key 6 is electrically connected, and the cathode terminal of the diode D4 is electrically connected with the first end of resistance R12, the resistance R12's
Second end is electrically connected with the anode tap of the diode D4, and the first end of the resistance R12 is electrically connected with the base stage of triode Q2,
The emitter of the triode Q2 is electrically connected and is grounded with the second end of the resistance R12, the collector of the triode Q1 with
The collector of the triode Q2 is electrically connected, and the collector of the triode Q2 is electrically connected with the first end of capacitor C3, the electricity
The second end for holding C3 is electrically connected with the first end of resistance R7, and the second end of the resistance R7 and the cathode terminal of diode D3 are electrically connected
It connects, the first end of the resistance R7 is electrically connected with the first end of resistance R6, the second end of the R6 and the diode D3 anode
End electrical connection, the first end of the capacitor R6 are electrically connected with the first end of resistance R5, the second end and triode of the resistance R5
The base stage of Q3 is electrically connected, and the emitter of the triode is electrically connected and is grounded with the second end of the resistance R6, the triode
The collector of Q3 is electrically connected with the second end of resistance R2, and the first end of the resistance R2 is electrically connected with power supply module 1.The present embodiment
In, triode Q1 is connected so that capacitor C3 charges after key 6 is pressed, and Q3 is connected over the ground during C3 charging, power switch M1
Opening VCC at this time has voltage output.
As shown in Fig. 2, the latching circuit 5 includes diode D2, the control of the Yang Jiduan of the diode and the MCU
End electrical connection processed, the extreme first end with resistance R3 of the diode D2 are electrically connected, the second end and pressure stabilizing of the resistance R3
The cathode terminal of pipe DZ3 is electrically connected, and the first end of the resistance R3 is electrically connected with the first end of capacitor C1, and the second of the capacitor C1
End is electrically connected with the second end of the resistance R3, and the cathode terminal of the voltage-stabiliser tube DZ3 is electrically connected with the first end of resistance R4, described
The second end of resistance R4 is electrically connected with the anode tap of the voltage-stabiliser tube DZ3, and the first end of the resistance R4 is with field-effect tube M2's
Grid electrical connection, the drain electrode of the field-effect tube M2 are electrically connected with the second end of the resistance R2, the source of the field-effect tube M2
Pole is electrically connected and is grounded with the second end of the resistance R4.In the present embodiment, there is voltage defeated when power switch M1 opens VCC at this time
Out, MCU_LOCK sets height and keeps output voltage after MCU powers on normal work, realize it is self-locking so that the voltage of power supply module 1
It keeps to obtain lasting voltage output.
As shown in figure 3, the key press detecting circuit 4 includes resistance R17, first end and the key electricity of the resistance R17
Connection, the second end of the resistance are electrically connected with voltage-stabiliser tube DZ1 cathode terminal, the anode tap and voltage-stabiliser tube DZ2 of the voltage-stabiliser tube DZ1
Cathode terminal electrical connection, the anode tap of the DZ2 be electrically connected with the first end of resistance R15, the second end of the resistance R15 with it is electric
The first end electrical connection of R16 is hindered, the first end of the resistance R16 is electrically connected with the base stage of triode Q5, told triode Q5's
Emitter is electrically connected with the second end of the resistance R16, and the collector of the triode Q5 is electrically connected with the base stage of triode Q4,
The collector of the triode Q4 is electrically connected and is grounded with the emitter of the triode Q5, the emitter of the triode Q4 with
The first end of resistance R13 is electrically connected, and the second end of the resistance R13 is electrically connected with the power supply module 1, the resistance R13's
First end is electrically connected with the first end of resistance R14, the detection port electricity of the second end of the resistance R14 and the MCU controller 2
Connection.In the present embodiment, triode Q5 shutdown, triode Q4 shutdown after key 6 disconnects, the test side detection of MCU controller 2
To high level, this circuit is used to realize that the state to key 6 detects, to determine whether being that external key 6 forces lower electricity.
The above is only a kind of a kind of preferred embodiment of any key wakeup circuit of low-power consumption of the utility model,
It does not limit the technical scope of the present invention, all foundation the technical essence of the utility model are to above implementation
Several modifications and improvements made by example, are still within the scope of the technical solutions of the present invention.
Claims (4)
1. a kind of any key wakeup circuit of low-power consumption, it is characterised in that: include power supply module (1), MCU controller (2), press
Key wake-up circuit (3), key press detecting circuit (4), latching circuit (5) and key (6), the key (6) and the key
The input terminal of wake-up circuit (3) is electrically connected, the output end of the key wakeup circuit (3) and the enable end electricity of power supply module (1)
Connection, the power output end of power supply module (1) are electrically connected with the power input of the MCU controller (2), the MCU control
The control terminal of device (2) is electrically connected with the input terminal of latching circuit (5), the output end of the latching circuit (5) and power supply module (1)
Enable end electrical connection, the key (6) is also electrically connected with the input terminal of key press detecting circuit (4), the key press detecting circuit
(4) output end is electrically connected with the detection port of controller.
2. any key wakeup circuit of a kind of low-power consumption according to claim 1, it is characterised in that: the key wakeup electricity
Road (3) includes resistance R8, and the first end of the resistance R8 is electrically connected with the first end of resistance R9, the first end of the resistance R9
It being electrically connected with power supply module (1), the second end of the resistance R8 is electrically connected with the first end of resistance R10, and the of the resistance R10
Two ends are electrically connected with the base stage of triode Q1, and the second end for telling resistance R9 is electrically connected with the emitting stage of the triode Q1, institute
The first end for stating resistance R10 is electrically connected with the first end of capacitor C2, and the second of the second end of the capacitor C2 and the resistance R10
End electrical connection, the first end of the C2 of the capacitor are electrically connected with the first end of capacitor C4, the second end and resistance of the capacitor C4
The first end of R11 is electrically connected, and the first end of the capacitor C4 is electrically connected with the first end of key (6), and the second of the resistance R11
End is electrically connected with the cathode terminal of diode D4, and the anode tap of the diode D4 is electrically connected with the second end of key (6), and described two
The cathode terminal of pole pipe D4 is electrically connected with the first end of resistance R12, the anode of the second end of the resistance R12 and the diode D4
End electrical connection, the first end of the resistance R12 is electrically connected with the base stage of triode Q2, the emitter of the triode Q2 with it is described
The second end of resistance R12 is electrically connected and is grounded, and the collector of the triode Q1 is electrically connected with the collector of the triode Q2,
The collector of the triode Q2 is electrically connected with the first end of capacitor C3, the second end of the capacitor C3 and the first end of resistance R7
Electrical connection, the second end of the resistance R7 are electrically connected with the cathode terminal of diode D3, the first end and resistance R6 of the resistance R7
First end electrical connection, the second end of the R6 is electrically connected with the diode D3 anode tap, the first end of the capacitor R6 and
The first end of resistance R5 is electrically connected, and the second end of the resistance R5 is electrically connected with the base stage of triode Q3, the hair of the triode
Emitter-base bandgap grading is electrically connected and is grounded with the second end of the resistance R6, and the second end of the collector and resistance R2 of the triode Q3 is electrically connected
It connects, the first end of the resistance R2 is electrically connected with power supply module (1).
3. any key wakeup circuit of a kind of low-power consumption according to claim 1 or 2, it is characterised in that: the self-locking electricity
Road (5) includes diode D2, and the Yang Jiduan of the diode is electrically connected with the control terminal of the MCU, the diode D2's
It is extremely electrically connected with the first end of resistance R3, the second end of the resistance R3 is electrically connected with the cathode terminal of voltage-stabiliser tube DZ3, the electricity
The first end of resistance R3 is electrically connected with the first end of capacitor C1, and the second end of the capacitor C1 and the second end of the resistance R3 are electrically connected
It connects, the cathode terminal of the voltage-stabiliser tube DZ3 is electrically connected with the first end of resistance R4, the second end of the resistance R4 and the voltage-stabiliser tube
The anode tap of DZ3 is electrically connected, and the first end of the resistance R4 is electrically connected with the grid of field-effect tube M2, the field-effect tube M2's
Drain electrode is electrically connected with the second end of the resistance R2, and the source electrode of the field-effect tube M2 is electrically connected with the second end of the resistance R4
And it is grounded.
4. any key wakeup circuit of a kind of low-power consumption according to claim 1, it is characterised in that: the key detection
Circuit (4) includes resistance R17, and the first end of the resistance R17 is electrically connected with key (6), the second end and pressure stabilizing of the resistance
The electrical connection of pipe DZ1 cathode terminal, the anode tap of the voltage-stabiliser tube DZ1 are electrically connected with the cathode terminal of voltage-stabiliser tube DZ2, the sun of the DZ2
It is extremely electrically connected with the first end of resistance R15, the second end of the resistance R15 is electrically connected with the first end of resistance R16, the electricity
The first end of resistance R16 is electrically connected with the base stage of triode Q5, the second end of the emitter of told triode Q5 and the resistance R16
Electrical connection, the collector of the triode Q5 is electrically connected with the base stage of triode Q4, the collector of the triode Q4 with it is described
The emitter of triode Q5 is electrically connected and is grounded, and the emitter of the triode Q4 is electrically connected with the first end of resistance R13, described
The second end of resistance R13 is electrically connected with the power supply module (1), the first end of the resistance R13 and the first end electricity of resistance R14
Connection, the second end of the resistance R14 are electrically connected with the detection port of the MCU controller (2).
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| CN201821947634.8U CN209149116U (en) | 2018-11-23 | 2018-11-23 | A kind of any key wakeup circuit of low-power consumption |
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| CN113517884A (en) * | 2021-06-24 | 2021-10-19 | 深之蓝(天津)水下智能科技有限公司 | Equipment on-off control circuit |
| CN115291661A (en) * | 2022-07-08 | 2022-11-04 | 广东天波信息技术股份有限公司 | Low-power-consumption standby circuit and control method thereof |
| CN116774638A (en) * | 2023-08-21 | 2023-09-19 | 北京领创医谷科技发展有限责任公司 | Switching circuit applied to external energy controller |
| CN117458833A (en) * | 2023-12-26 | 2024-01-26 | 无锡梵克罗电气设计有限公司 | Battery-powered frequency converter low-power-consumption startup awakening circuit and frequency converter |
| CN117458833B (en) * | 2023-12-26 | 2024-04-19 | 无锡梵克罗电气设计有限公司 | Battery-powered frequency converter low-power-consumption startup awakening circuit and frequency converter |
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