CN208888630U - A kind of multivoltage multifunctional multiplexing reset switch latching circuit - Google Patents
A kind of multivoltage multifunctional multiplexing reset switch latching circuit Download PDFInfo
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- CN208888630U CN208888630U CN201821999872.3U CN201821999872U CN208888630U CN 208888630 U CN208888630 U CN 208888630U CN 201821999872 U CN201821999872 U CN 201821999872U CN 208888630 U CN208888630 U CN 208888630U
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Abstract
The utility model discloses a kind of multivoltage multifunctional multiplexing reset switch latching circuits, including power input, on/off control module, power output end, start-up mode isolation module, keypress function isolation module, MCU module and multiplexing key module；One key of circuit is multi-purpose, and key can both be used as switching on and shutting down, can also be used as control MCU module signal, and the two signal is not interfere with each other；A variety of start-up modes.Traditional key can be used to be switched on, sensor signal booting also can be used.And key starting-up signal can be different with sensor signal voltage.Signal will not have other influences to circuit after isolation.It is suitble to use in the circuit of multivoltage complexity.
Description
Technical field
The utility model relates to switching circuit control field, in particular to a kind of multivoltage multifunctional multiplexing reset switch is certainly
Lock circuit.
Background technique
It is reset switch collocation PMOS tube that the current mainstream of product complete machine power switch, which is mechanical switch 2. there are two types of mode 1.,
With the mode of NMOS tube, when switch is pressed, by the characteristic of capacitor energization instantaneous short circuit, moment opens PMOS tube, then passes through
The pole D of PMOS tube powers to the pole G of NMOS tube and takes over open signal.When disconnecting power supply, capacitor is passed through by reset switch moment
Connect the pole S and the pole D of NMOS.The pole the G signal of PMOS is cut off, power supply of the whole machine is closed.
Opposite reset switch, mechanical switch price is high, intolerant to abrasion, can not multiplex switch do other function；Existing mainstream is multiple
Position key is used as power switch, in multivoltage, can not be multiplexed and do other control uses.Or power supply and control can be made
In the case where unification, power supply is not often really to disconnect.Only make product standby, power consumption is larger.
In flush type circuit, often voltage has two or more in circuit.And circuit requirement is small and exquisite, single switch should be done
Power supply of the whole machine is done control again and is used, and high voltage is very easy to fill by the way that key is counter into MCU module, until damaging MCU module
It is bad.In addition, when in case of needed multi-signal to be switched on, it is often in a helpless situation hopeless.
Utility model content
The technical problem to be solved by the utility model is to provide a kind of self-locking electricity of multivoltage multifunctional multiplexing reset switch
Road, a key is multi-purpose, is provided simultaneously with a variety of start-up modes, to solve the above-mentioned many defects caused by the prior art.
A kind of multivoltage multifunctional multiplexing reset that achieve the above objectives, the present invention provides the following technical solutions:
Switch latching circuit, including power input, on/off control module, power output end, start-up mode isolation module；
Circuit power supply component is given in power input, outside；
On/off control, the control signal for receiving start-up mode isolation module carry out the output of on and off power input
End, when the module is opened, power input powers on output end；
Power output end is powered for circuit load, when the module is powered, entire product electrification；
A variety of starting-up signals are isolated when a variety of conditions need product to be switched on for start-up mode isolation module, in order to avoid signal
Crosstalk.
Preferably, the starting-up signal can provide for key, single-chip microcontroller, sensor element, and acceptable multiple voltage
Mixing, not will cause component wear.
Preferably, the start-up mode isolation module is circumscribed with keypress function isolation module and multiplexing key module；
Multiplexing key module can be used for opening product power supply when product is not keyed up, and control button can be used as after booting；
Keypress function isolation module is opened by the starting-up signal of the push button signalling of multiplexing or by control signal isolation, in order to avoid different voltages
Load generates adverse effect together.
Preferably, the start-up mode isolation module is circumscribed with MCU module；It receives the signal of multiplexing key and executes corresponding
Operation, feeds back to start-up mode isolation module for signal.
Preferably, the start-up mode isolation module is circumscribed with other start-up mode modules, for waking up booting.
Be using the beneficial effect of above technical scheme: one key of circuit is multi-purpose, and key can both be used as switching on and shutting down,
Control MCU module signal can also be used as, the two signal is not interfere with each other；A variety of start-up modes.Traditional key can be used
Sensor signal booting also can be used in booting.And key starting-up signal can be different with sensor signal voltage.Signal warp
There will not be other influences to circuit after crossing isolation.It is suitble to use in the circuit of multivoltage complexity；This circuit is subjected to 3-24V electricity
Pressure, so that it can not only work in the circuit with MCU module, can also be used cooperatively with PIC module；Due to using
Metal-oxide-semiconductor does control unit, and in the power-offstate, loss is very small for circuit, can be neglected.
Detailed description of the invention
Fig. 1 is the circuit block diagram of the utility model.
Fig. 2 is the on/off circuit figure of the utility model.
Specific embodiment
The preferred embodiment that according to the present invention will be described in detail below with reference to the accompanying drawings.
Fig. 1 and Fig. 2 show specific embodiment of the present utility model: a kind of multivoltage multifunctional multiplexing reset switch is self-locking
Circuit, including power input, on/off control module, power output end, start-up mode isolation module；
Circuit power supply component is given in power input, outside；
On/off control, the control signal for receiving start-up mode isolation module carry out the output of on and off power input
End, when the module is opened, power input powers on output end；
Power output end is powered for circuit load, when the module is powered, entire product electrification；
A variety of starting-up signals are isolated when a variety of conditions need product to be switched on for start-up mode isolation module, in order to avoid signal
Crosstalk.
Preferably, the starting-up signal can provide for key, single-chip microcontroller, sensor element, and acceptable multiple voltage
Mixing, not will cause component wear.
Preferably, the start-up mode isolation module is circumscribed with keypress function isolation module and multiplexing key module；
Multiplexing key module can be used for opening product power supply when product is not keyed up, and control button can be used as after booting；
Keypress function isolation module opens the starting-up signal of the push button signalling of multiplexing or control signal isolation, in case different voltages add
Load generates adverse effect together.
Preferably, the start-up mode isolation module is circumscribed with MCU module；It receives the signal of multiplexing key and executes corresponding
Operation, feeds back to start-up mode isolation module for signal.
Preferably, the start-up mode isolation module is circumscribed with other start-up mode modules, for waking up booting.
When off-mode, the pole G of Q1 makes Q1 be in off state due to R17 pull-up.VMCU module is 0V.
When pressing S2, the pole G of Q1 is via D1, S2 to ground.Q1 conducting.VMCU module is powered, and load is powered, MCU module
Work.MCU module signal is added to the pole G of Q2 by R63, D6, takes over key works, the pole G of Q1 via Q2 the pole D, S to,
Q1 is set to continue to be connected.Key loses booting effect, can discharge and be used as other use.
When under open state, by key pressing, Power_Check signal is conducting to ground through D1, S2, and signal is by original 3.3V
Become about 0.3V.The signal connects MCU module.At this point, since D1 is isolated.VBAT signal will not enter 3.3V, 3.3V signal
VBAT will not be entered.MCU module can be by by key pressing length of time or pressing number and identifying different orders.
When off-mode, VSIN signal occurs, the pole G through R62, D6 to Q2, Q2 conducting.The pole G of Q1 via Q2 S, D
Pole is switched to ground, Q1 conducting.VMCU module recovery power supply, MCU module work, with key booting, MCU module signal passes through
R63, D6 are added to the pole G of Q2, take over VSIN signal.VSIN signal can be 3-24V.
In traditional circuit, voltage is single, or even can only receive 5V or less voltage.This circuit can be mixed with multivoltage, both may be used
To receive the single-chip microcomputer signal of 3.3V, the sensor signal of 24V can also be received.
In traditional circuit, it can only be switched on via by key pressing.It in this circuit, is not only able to be switched on by key, can also connect
It is switched on by external signal, such as sensor, PLC wake up, wherein waking up about PLC, key can not only pass through MCU (PIC)
It wakes up, and may be waken up by PLC.Illustrate his functional diversity.
In traditional circuit, push button signalling otherwise be used as booting use or be used as MCU module control use.If necessary to both open
Machine is used, and is used as MCU module control again, circuit cannot be fully powered-off, and stand-by power consumption is larger.Base of this circuit in traditional circuit
On plinth, push button signalling not only can be used as booting and use, but also can be used as MCU module control.It in the shutdown state, can also be by load electricity
Road is fully disconnected, and shutdown power consumption is preferably minimized.
One key of circuit is multi-purpose, and key can both be used as switching on and shutting down, can also be used as and control MCU module signal, and two
Person's signal is not interfere with each other；A variety of start-up modes.Traditional key can be used to be switched on, sensor signal also can be used and open
Machine.And key starting-up signal can be different with sensor signal voltage.Signal will not have other shadows after isolation to circuit
It rings.It is suitble to use in the circuit of multivoltage complexity；This circuit is subjected to 3-24V voltage, so that it can not only work in band
In the circuit of MCU module, it can also be used cooperatively with PLC module；Due to using metal-oxide-semiconductor to do control unit, circuit is in shutdown shape
Under state, loss is very small, can be neglected.
Above-described is only preferred embodiments of the present invention, it is noted that for the ordinary skill of this field
For personnel, without departing from the concept of the present invention, various modifications and improvements can be made, these all belong to
In the protection scope of the utility model.
Claims (5)
1. a kind of multivoltage multifunctional multiplexing reset switch latching circuit, which is characterized in that including power input, on/off
Control module, power output end, start-up mode isolation module；
Circuit power supply component is given in power input, outside；
On/off control, the control signal for receiving start-up mode isolation module carry out on and off power input output end, when
When the module is opened, power input powers on output end；
Power output end is powered for circuit load, when the module is powered, entire product electrification；
A variety of starting-up signals are isolated when a variety of conditions need product to be switched on for start-up mode isolation module, in order to avoid train of signal
It disturbs.
2. a kind of multivoltage multifunctional multiplexing reset switch latching circuit according to claim 1, which is characterized in that described
Starting-up signal can provide for key, single-chip microcontroller, sensor element, and acceptable multiple voltage mixing, not will cause element damage
It is bad.
3. a kind of multivoltage multifunctional multiplexing reset switch latching circuit according to claim 1, which is characterized in that described
Start-up mode isolation module is circumscribed with keypress function isolation module and multiplexing key module；
Multiplexing key module can be used for opening product power supply when product is not keyed up, and control button can be used as after booting；Key
Function isolation module is opened by the starting-up signal of the push button signalling of multiplexing or by control signal isolation, in case different voltages load
Adverse effect is generated together.
4. a kind of multivoltage multifunctional multiplexing reset switch latching circuit according to claim 1, which is characterized in that described
Start-up mode isolation module is circumscribed with MCU module；It receives the signal of multiplexing key and executes corresponding operating, signal is fed back to out
Machine mode isolation module.
5. a kind of multivoltage multifunctional multiplexing reset switch latching circuit according to claim 1, which is characterized in that described
Start-up mode isolation module is circumscribed with other start-up mode modules, for waking up booting.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821999872.3U CN208888630U (en) | 2018-11-30 | 2018-11-30 | A kind of multivoltage multifunctional multiplexing reset switch latching circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821999872.3U CN208888630U (en) | 2018-11-30 | 2018-11-30 | A kind of multivoltage multifunctional multiplexing reset switch latching circuit |
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| CN208888630U true CN208888630U (en) | 2019-05-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109884935A (en) * | 2018-11-30 | 2019-06-14 | 珠海趣印科技有限公司 | A kind of multivoltage multifunctional multiplexing reset switch latching circuit |
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2018
- 2018-11-30 CN CN201821999872.3U patent/CN208888630U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109884935A (en) * | 2018-11-30 | 2019-06-14 | 珠海趣印科技有限公司 | A kind of multivoltage multifunctional multiplexing reset switch latching circuit |
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