CN207070036U - A kind of button multiplexing power switch circuit - Google Patents
A kind of button multiplexing power switch circuit Download PDFInfo
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- CN207070036U CN207070036U CN201721038889.8U CN201721038889U CN207070036U CN 207070036 U CN207070036 U CN 207070036U CN 201721038889 U CN201721038889 U CN 201721038889U CN 207070036 U CN207070036 U CN 207070036U
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Abstract
A kind of button multiplexing power switch circuit, including touch-switch K1, P MOS K2, N MOS K3, resistance R, the first diode D1, the second diode D2, DC DC circuits and MCU circuits, the source electrode of the P MOS K2 connects input supply terminal, P MOS K2 drain electrode connects DC DC inputs, and P MOS K2 grid connects N MOS K3 drain electrode；Negative pole of the described touch-switch K1 one end respectively with the first diode D1 and the second diode D2 is connected, touch-switch K1 other end ground connection, the positive pole access MCU circuits of the first diode D1.The beneficial effects of the utility model are not have to extra increase mechanical switch, while can completely close power supply, eliminate shutdown power consumption, have certain application value.
Description
Technical field
It the utility model is related to power switch technical field, and in particular to a kind of button multiplexing power switch circuit.
Background technology
Traditional circuit processing power supply shutdown only has two ways：First, shut down by button, MCU Current Controller circuits enter
Low-power consumption, it is impossible to completely close power supply, circuit has still maintained after shutdown；Second, increase mechanical switch, closed by mechanical switch
Power supply is closed, increases cost.
Utility model content
The purpose of this utility model is to provide a kind of button multiplexing power switch circuit, to solve in above-mentioned background technology
The problem of proposition.
To achieve the above object, the utility model provides following technical scheme：
A kind of button multiplexing power switch circuit, including touch-switch K1, P-MOS K2, N-MOS K3, resistance R, first
Diode D1, the second diode D2, DC-DC circuit and MCU circuits, the source electrode of the P-MOS K2 meet input supply terminal, P-MOS
K2 drain electrode connects DC-DC inputs, and P-MOS K2 grid connects N-MOS K3 drain electrode；Described touch-switch K1 one end respectively with
First diode D1 and the second diode D2 negative pole connect, touch-switch K1 other end ground connection, the first diode D1
Positive pole access MCU circuits.
It is as further program of the utility model：The source ground of the N-MOS K3.
As the utility model, further scheme is：The grid of the N-MOS K3 is controlled by MCU circuits.
The beneficial effects of the utility model are not have to extra increase mechanical switch, while can completely close power supply, are eliminated
Shutdown power consumption, has certain application value.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belong to the scope of the utility model protection.
Referring to Fig. 1, in the utility model embodiment, a kind of button multiplexing power switch circuit, including touch-switch K1,
P-MOS K2, N-MOS K3, resistance R, the first diode D1, the second diode D2, DC-DC circuit and MCU circuits, the P-
MOS K2 source electrode connects input supply terminal, and P-MOS K2 drain electrode connects DC-DC inputs, and P-MOS K2 grid meets N-MOS K3
Drain electrode, switches of the P-MOS K2 as circuit general supply, DC-DC circuit provides suitable power supply for MCU circuits；
The source ground of the N-MOS K3, the grid of the N-MOS K3 are controlled by MCU circuits, N-M0S K3 and resistance
R provides switching signal for P-MOS grid, MCU circuit output open signals during start, control N-MOS K3 conductings, so as to tie up
Hold P-MOS K2 conductings；During shutdown, MCU circuit output shutdown signals, control N-MOS K3 disconnect, P-MOS K2 grid voltage
Draw high, P-MOS K3 shut-offs, close the power supply of whole circuit.
Negative pole of the described touch-switch K1 one end respectively with the first diode D1 and the second diode D2 is connected, touch-switch
K1 other end ground connection, the positive pole access MCU circuits of the first diode D1；The both ends of the resistance R are respectively with the two or two
Pole pipe D2 positive pole is connected with P-MOS K2 one end, as shutdown when, MCU circuits without electricity in the case of, P-MOS K2 switch
Control；Under power down condition, long-press touch-switch K1, P-MOS K2 grid drag down, and P-MOS K2 conductings, then whole circuit leads to
Electricity, MCU circuits are opened, and then have the control N-MOS K3 conductings of MCU circuits, so as to maintain P-MOS K2 to turn on；Believe as switch
Number input, is then push button signalling when the time that button is pressed is less than 1s under switch on condition；When the time that button is pressed is more than 1s,
It is then off signal.
The effect of MCU circuits is collection switching signal, when the time that MCU electric circuit inspections to button are pressed being less than 1s, then
It is judged as push button signalling, performs corresponding keypress function, when the time that MCU electric circuit inspections to button are pressed being more than 1s, then sentences
Break and make corresponding switch for switching on and shutting down signal, control N-MOS K3, so as to control P-MOS K2 to switch.
It is obvious to a person skilled in the art that the utility model is not limited to the details of above-mentioned one exemplary embodiment, and
And in the case of without departing substantially from spirit or essential attributes of the present utility model, it can realize that this practicality is new in other specific forms
Type.Therefore, no matter from the point of view of which point, embodiment all should be regarded as exemplary, and is nonrestrictive, this practicality is new
The scope of type limits by appended claims rather than described above, it is intended that the equivalency fallen in claim is contained
All changes in justice and scope are included in the utility model.Any reference in claim should not be considered as limitation
Involved claim.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped
Containing an independent technical scheme, this narrating mode of specification is only that those skilled in the art should for clarity
Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
It is appreciated that other embodiment.
Claims (3)
1. a kind of button multiplexing power switch circuit, it is characterised in that including touch-switch K1, P-MOS K2, N-MOS K3, electricity
Resistance R, the first diode D1, the second diode D2, DC-DC circuit and MCU circuits, the source electrode of the P-MOS K2 connect input power
End, P-MOS K2 drain electrode connect DC-DC inputs, and P-MOS K2 grid connects N-MOS K3 drain electrode；The touch-switch K1
Negative pole of the one end respectively with the first diode D1 and the second diode D2 is connected, touch-switch K1 other end ground connection, and described the
One diode D1 positive pole access MCU circuits.
A kind of 2. button multiplexing power switch circuit according to claim 1, it is characterised in that the source of the N-MOS K3
Pole is grounded.
A kind of 3. button multiplexing power switch circuit according to claim 1 or 2, it is characterised in that the N-MOS K3
Grid controlled by MCU circuits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721038889.8U CN207070036U (en) | 2017-08-18 | 2017-08-18 | A kind of button multiplexing power switch circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721038889.8U CN207070036U (en) | 2017-08-18 | 2017-08-18 | A kind of button multiplexing power switch circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207070036U true CN207070036U (en) | 2018-03-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721038889.8U Active CN207070036U (en) | 2017-08-18 | 2017-08-18 | A kind of button multiplexing power switch circuit |
Country Status (1)
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| CN (1) | CN207070036U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109302766A (en) * | 2018-08-31 | 2019-02-01 | 深圳市德赛微电子技术有限公司 | A kind of the pin multiplexing control system and its control method of low-power consumption |
-
2017
- 2017-08-18 CN CN201721038889.8U patent/CN207070036U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109302766A (en) * | 2018-08-31 | 2019-02-01 | 深圳市德赛微电子技术有限公司 | A kind of the pin multiplexing control system and its control method of low-power consumption |
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