CN108768364A - A kind of power switch button circuit - Google Patents
A kind of power switch button circuit Download PDFInfo
- Publication number
- CN108768364A CN108768364A CN201810980035.4A CN201810980035A CN108768364A CN 108768364 A CN108768364 A CN 108768364A CN 201810980035 A CN201810980035 A CN 201810980035A CN 108768364 A CN108768364 A CN 108768364A
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- field
- effect tube
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- key
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- 238000001514 detection method Methods 0.000 claims abstract description 11
- 230000005669 field effect Effects 0.000 claims description 31
- 230000005611 electricity Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 2
- 230000002045 lasting effect Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000004065 semiconductor Substances 0.000 description 6
- 230000003750 conditioning effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/296—Time-programme switches providing a choice of time-intervals for executing more than one switching action and automatically terminating their operation after the programme is completed
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/567—Circuits characterised by the use of more than one type of semiconductor device, e.g. BIMOS, composite devices such as IGBT
Landscapes
- Control Of Resistance Heating (AREA)
Abstract
The present invention proposes a kind of power switch button circuit, circuit setting button module, power supply module and the detection module, reduce the use of button and switch, key circuit cost of manufacture is reduced, in conjunction with microcontroller so that booting, shutdown and custom feature can be realized in a button.
Description
Technical field
The present invention relates to technical field of circuit control, more particularly, to a kind of power switch button circuit.
Background technology
Currently, the power switch and function button of most of embedded electronic product are all separately independent mutually, it will not
It influences each other.Problems with is deposited in this design：One, power switch takes the mechanical switch such as rocker type switch or toggle switch, opens
Power supply must be manually closed after power supply, if forgetting to close power supply, product by continue working until battery exhausts, though product
Supply voltage can be so monitored, but actively close power supply without any method；Two, power switch is worked normally in product
Period is in idle state, can not provide multiplexing function, to realize that required function can only additionally increase button；Three, it cannot achieve
This function of preventing user misoperation of long-press switching on and shutting down, certain products are once switched on, it may be undesirable to which user is because of maloperation
And shut down suddenly, this will lead to the generation for the situations such as measurement is interrupted or data are not come and preserved.
Invention content
The technical problem to be solved by the present invention is to be directed to prior art deficiency and defect, a kind of power switch button electricity is provided
Road.
To achieve the above object, the present invention uses following technical scheme：
A kind of power switch button circuit, including key-press module, power supply module, detection module, concrete structure are as follows：
Key-press module, including first port, for being electrically connected with power supply module and detection module.
Power supply module is specially power supply chip（U1）Connect the first field-effect tube（Q1）Drain electrode, the first field-effect tube（Q1）Grid
The first capacitance is connected between pole and ground（C1）, the first field-effect tube（Q1）First resistor is connected between grid and source electrode（R1）, the
One field-effect tube（Q1）Source electrode is sequentially connected second resistance（R2）, the second field-effect tube（Q2）Collector, the second field-effect tube
（Q2）Emitter is grounded, the second field-effect tube（Q2）Base stage is sequentially connected the 4th resistance（R4）, 3rd resistor（R3）, 3rd resistor
（R3）The other end is connected to positive supply, the second field-effect tube（Q2）Base stage is also connected with the 5th resistance（R5）, the 5th resistance（R5）Separately
One end is grounded, 3rd resistor（R3）With the 4th resistance（R4）Between draw wiring be connected to microcontroller switching signal pin（ON-
OFF）, key-press module first port is connected to the second field-effect tube（Q2）Collector.
Detection module is specially third field-effect tube（Q3）Emitter the 6th resistance of series connection（R6）It is connected to key-press module
Single port, third field-effect tube（Q3）The 7th resistance is connected between emitter and collector（R7）, third field-effect tube（Q3）Collection
Electrode connects the 8th resistance（R8）After be grounded, third field-effect tube（Q3）Collector and the 8th resistance（R8）Between draw wiring connect
It is connected to monolithic machine testing pin（KEY_CPW）.
Further, the key-press module further includes button（S1）And second port, second port ground connection, button（S1）With
In the connected state of control first port and second port.
Further, first field-effect tube is P-channel metal-oxide-semiconductor, and the second field-effect tube is NPN type triode, the
Three field-effect tube are PNP type triode.
Further, monolithic machine testing pin detection level signal is high level and lasting certain time length, then controls list
Piece machine switch pin exports high level signal, and otherwise switch pin exports low level.
Further, further include the first diode（D1）With the second diode（D2）, first diode（D1）String
It is coupled to key-press module first port and NPN type triode（Q2）Between collector, second diode（D2）It is series at button
Module first port and the 6th resistance（R6）Between.
Further, the operating voltage that the power supply chip provides is+3.3V.
The present invention power switch button circuit setting button module, power supply module and detection module, reduce button and
The use of switch reduces key circuit cost of manufacture, in conjunction with microcontroller so that a button can be realized booting, shut down and make by oneself
Adopted function.
Description of the drawings
Fig. 1 is circuit diagram in embodiment.
Specific implementation mode
The present invention is further illustrated With reference to embodiment.
A kind of power switch button circuit, concrete structure are as follows：
Key-press module, including button S1, first port and second port, second port ground connection, wherein button S1 is for controlling the
The connected state of Single port and second port；Power supply chip U1 connection P-channel metal-oxide-semiconductors Q1 drain electrode, P-channel metal-oxide-semiconductor Q1 grids with
Capacitance C1 is connected between ground, resistance R1 is connected between P-channel metal-oxide-semiconductor Q1 grids and source electrode, and P-channel metal-oxide-semiconductor Q1 source electrodes connect successively
Connecting resistance R2, NPN type triode Q2 collectors, NPN type triode Q2 emitters ground connection, NPN type triode Q2 base stages connect successively
Connecting resistance R4, resistance R3, the resistance R3 other ends are connected to positive supply, and NPN type triode Q2 base stages are also connected with resistance R5, resistance R5
The other end is grounded, and wiring is drawn between resistance R3 and resistance R4 and is connected to microcontroller switching signal pin ON-OFF, key-press module
First port is connected to NPN type triode Q2 collectors；PNP type triode Q3 emitter series resistances R6 is connected to key-press module
First port connects resistance R7, PNP type triode Q3 collectors connection electricity between PNP type triode Q3 emitters and collector
It is grounded after resistance R8, wiring is drawn between PNP type triode Q3 collectors and resistance R8 and is connected to monolithic machine testing pin KEY_
CPW。
Circuit further includes diode D1 and diode D2, and diode D1 is series at key-press module first port and NPN type three
Between pole pipe Q2 collectors, diode D2 is series between key-press module first port and resistance R6.Diode D1 and diode
D2's is oppositely arranged for ensureing the mutually not shadow of the level signal between pin KEY_CPW detection level signal and pin ON-OFF
It rings.
The circuit concrete operating principle is：Q1 uses the metal-oxide-semiconductor of P-channel, is not keyed up under state, due to the presence of R1, makes
Its grid is in high level state always, and entire subsequent conditioning circuit is in off-position.Once button S1 is pressed, make the grid of Q1
In low level state, the source electrode and drain electrode of Q1 is in the conduction state at this time, and VIN is no better than VBAT.Power supply chip U1 is immediately
Offer+3.3V operating voltages make microcontroller start to start work.When microcontroller pin ON_OFF temporary no initializtions, due to
Resistance R3 forces pull-up by+3.3V, so soon unclamping S1 at this time, entire circuit is also still in power supply state.Microcontroller
KEY_CPW pins detect high level, if the duration be more than defined length temporally（Such as 3s）, then make ON_OFF defeated
Go out high level to maintain power supply state, otherwise persistently export low level, until S1 buttons unclamp.At this time due to the effect of Q2, Q1
Grid again be in high level state so that the source electrode and drain electrode of Q1 is no longer on conducting state, at this time subsequent conditioning circuit again into
Enter off-position.After product normal operation, as long as detecting that S1 buttons have short-press behavior, then respond thereto.If inspection
Measuring S1 has long-press phenomenon, then according to circumstances decides whether to shut down at once, if necessary to shut down, then only needs as described above, to ON_
OFF pins persistently export low level.
Claims (6)
1. a kind of power switch button circuit, including key-press module, power supply module, detection module, it is characterised in that：Button mould
Block, including first port, for being electrically connected with power supply module and detection module；
Power supply module is specially power supply chip（U1）Connect the first field-effect tube（Q1）Drain electrode, the first field-effect tube（Q1）Grid with
The first capacitance is connected between ground（C1）, the first field-effect tube（Q1）First resistor is connected between grid and source electrode（R1）, first
Effect pipe（Q1）Source electrode is sequentially connected second resistance（R2）, the second field-effect tube（Q2）Collector, the second field-effect tube（Q2）Hair
Emitter grounding, the second field-effect tube（Q2）Base stage is sequentially connected the 4th resistance（R4）, 3rd resistor（R3）, 3rd resistor（R3）Separately
One end is connected to positive supply, the second field-effect tube（Q2）Base stage is also connected with the 5th resistance（R5）, the 5th resistance（R5）Another termination
Ground, 3rd resistor（R3）With the 4th resistance（R4）Between draw wiring be connected to microcontroller switching signal pin（ON-OFF）, press
Key module first port is connected to the second field-effect tube（Q2）Collector；
Detection module is specially third field-effect tube（Q3）Emitter the 6th resistance of series connection（R6）It is connected to key-press module first end
Mouthful, third field-effect tube（Q3）The 7th resistance is connected between emitter and collector（R7）, third field-effect tube（Q3）Collector
Connect the 8th resistance（R8）After be grounded, third field-effect tube（Q3）Collector and the 8th resistance（R8）Between draw wiring be connected to
Monolithic machine testing pin（KEY-CPW）.
2. a kind of power switch button circuit according to claim 1, it is characterised in that：The key-press module further include by
Key（S1）And second port, second port ground connection, button（S1）Connected state for controlling first port and second port.
3. a kind of power switch button circuit according to claim 2, it is characterised in that：First field-effect tube is P
Channel MOS tube, the second field-effect tube are NPN type triode, and third field-effect tube is PNP type triode.
4. a kind of power switch button circuit according to claim 3, it is characterised in that：Monolithic machine testing pin detection electricity
Ordinary mail number is high level and lasting certain time length, then control single chip computer switch pin exports high level signal, otherwise switch pin
Export low level.
5. a kind of power switch button circuit according to claim 4, it is characterised in that：It further include the first diode（D1）
With the second diode（D2）, first diode（D1）It is series at key-press module first port and NPN type triode（Q2）Collection
Between electrode, second diode（D2）It is series at key-press module first port and the 6th resistance（R6）Between.
6. a kind of power switch button circuit according to claim 5, it is characterised in that：The work that the power supply chip provides
It is+3.3V to make voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810980035.4A CN108768364A (en) | 2018-08-27 | 2018-08-27 | A kind of power switch button circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810980035.4A CN108768364A (en) | 2018-08-27 | 2018-08-27 | A kind of power switch button circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108768364A true CN108768364A (en) | 2018-11-06 |
Family
ID=63966417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810980035.4A Pending CN108768364A (en) | 2018-08-27 | 2018-08-27 | A kind of power switch button circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108768364A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111669158A (en) * | 2020-05-19 | 2020-09-15 | 浙江工业大学 | Portable multifunctional switch circuit |
| CN112558655A (en) * | 2020-12-07 | 2021-03-26 | 东莞圣柏电子有限公司 | Control circuit of warmer and warmer thereof |
| CN113391580A (en) * | 2021-05-24 | 2021-09-14 | 沈阳格林豪森物业管理有限公司 | Standby energy-saving circuit system based on single chip microcomputer, control method and remote controller |
| CN115425618A (en) * | 2022-10-24 | 2022-12-02 | 东莞市森威电子有限公司 | Automatic shutdown circuit of non-resilient switch |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103699199A (en) * | 2013-12-20 | 2014-04-02 | 青岛歌尔声学科技有限公司 | Electronic device on-off control device and electronic device |
| CN106814841A (en) * | 2016-11-30 | 2017-06-09 | 佛山市兴华源机械设备有限公司 | A kind of power control circuit for saving electric energy |
| CN209046611U (en) * | 2018-08-27 | 2019-06-28 | 湖南声仪测控科技有限责任公司 | A kind of power switch button circuit |
-
2018
- 2018-08-27 CN CN201810980035.4A patent/CN108768364A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103699199A (en) * | 2013-12-20 | 2014-04-02 | 青岛歌尔声学科技有限公司 | Electronic device on-off control device and electronic device |
| CN106814841A (en) * | 2016-11-30 | 2017-06-09 | 佛山市兴华源机械设备有限公司 | A kind of power control circuit for saving electric energy |
| CN209046611U (en) * | 2018-08-27 | 2019-06-28 | 湖南声仪测控科技有限责任公司 | A kind of power switch button circuit |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111669158A (en) * | 2020-05-19 | 2020-09-15 | 浙江工业大学 | Portable multifunctional switch circuit |
| CN111669158B (en) * | 2020-05-19 | 2023-03-21 | 浙江工业大学 | Portable multifunctional switch circuit |
| CN112558655A (en) * | 2020-12-07 | 2021-03-26 | 东莞圣柏电子有限公司 | Control circuit of warmer and warmer thereof |
| CN113391580A (en) * | 2021-05-24 | 2021-09-14 | 沈阳格林豪森物业管理有限公司 | Standby energy-saving circuit system based on single chip microcomputer, control method and remote controller |
| CN115425618A (en) * | 2022-10-24 | 2022-12-02 | 东莞市森威电子有限公司 | Automatic shutdown circuit of non-resilient switch |
| EP4362334A1 (en) * | 2022-10-24 | 2024-05-01 | Sndway Technology (Guangdong) Co., Ltd. | Automatic power off circuit of non-rebound switches |
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