CN206490663U - The switching on and shutting down power supply circuit for completely cutting through power supply is realized using touch-switch - Google Patents
The switching on and shutting down power supply circuit for completely cutting through power supply is realized using touch-switch Download PDFInfo
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- CN206490663U CN206490663U CN201720107478.3U CN201720107478U CN206490663U CN 206490663 U CN206490663 U CN 206490663U CN 201720107478 U CN201720107478 U CN 201720107478U CN 206490663 U CN206490663 U CN 206490663U
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- power supply
- resistor
- connection
- electric capacity
- chip microcomputer
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Abstract
The switching on and shutting down power supply circuit for completely cutting through power supply is realized the utility model discloses a kind of use touch-switch, it includes first resistor, second resistance, 3rd resistor, 4th resistance, single-chip microcomputer, first electric capacity, second electric capacity, 3rd electric capacity, first diode, key switch, single-chip microcomputer and the first capacitance connection, single-chip microcomputer one end is grounded, second electric capacity and the 3rd electric capacity are in parallel, first resistor and the 3rd capacitance connection, first diode and 3rd resistor connection, first diode and the connection of the 4th resistance, 3rd resistor and the 4th resistor coupled in parallel, first resistor and second resistance connection, key switch and single-chip microcomputer connection.The utility model coordinates microprocessor control using a key switch, realizes the fully powered-off switching on and shutting down control of battery powered Infrared Hand-Held machine, and the standby current of whole Infrared Hand-Held machine is minimum, and the time lengthens significantly, extends the service life of lithium battery.
Description
Technical field
The utility model is related to a kind of power supply circuit, and more particularly to a kind of realized using touch-switch completely cuts through power supply
Switching on and shutting down power supply circuit.
Background technology
Existing switching on and shutting down power supply circuit uses toggle switch, and the service life of lithium battery is short.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of use touch-switch realization and completely cuts through power supply
Switching on and shutting down power supply circuit, it is coordinated MCU (microcontroller) controls, realized battery powered infrared using a key switch
The fully powered-off switching on and shutting down control of hand-held set, the standby current of whole Infrared Hand-Held machine is minimum, and the time lengthens significantly, extends lithium
The service life of battery.
The utility model is to solve above-mentioned technical problem by following technical proposals：One kind is realized using touch-switch
Completely cut through the switching on and shutting down power supply circuit of power supply, it is characterised in that it includes first resistor, second resistance, 3rd resistor, the 4th
Resistance, single-chip microcomputer, the first electric capacity, the second electric capacity, the 3rd electric capacity, the first diode, key switch, single-chip microcomputer and the first electric capacity connect
Connect, single-chip microcomputer one end ground connection, the second electric capacity and the 3rd electric capacity are in parallel, first resistor and the 3rd capacitance connection, the first diode and
3rd resistor is connected, the first diode and the connection of the 4th resistance, 3rd resistor and the 4th resistor coupled in parallel, first resistor and the second electricity
Resistance connection, key switch and single-chip microcomputer connection.
Preferably, the single-chip microcomputer is the low pressure difference linear voltage regulator chip that Infrared Hand-Held machine is powered.
Preferably, the power supply connection of one end of first electric capacity and a microcontroller.
Preferably, the positive pole connection of one end of the single-chip microcomputer and a lithium battery.
Positive effect of the present utility model is：The utility model coordinates MCU (micro-controls using a key switch
Device processed) control, realize battery powered Infrared Hand-Held machine it is fully powered-off switching on and shutting down control, whole Infrared Hand-Held machine it is standby
Electric current is minimum, and the time lengthens significantly, extends the service life of lithium battery.
Brief description of the drawings
Fig. 1 is that the utility model realizes the switching on and shutting down power supply circuit for completely cutting through power supply using touch-switch.
Embodiment
The utility model preferred embodiment is provided below in conjunction with the accompanying drawings, to describe the technical solution of the utility model in detail.
As shown in figure 1, the utility model realizes that the switching on and shutting down power supply circuit for completely cutting through power supply includes using touch-switch
First resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4, single-chip microcomputer U1, the first electric capacity C1, the second electric capacity C2,
Three electric capacity C3, the first diode D1, key switch S7, single-chip microcomputer U1 and the first electric capacity C1 connections, single-chip microcomputer U1 one end ground connection, the
Two electric capacity C2 and the 3rd electric capacity C3 are in parallel, first resistor R1 and the 3rd electric capacity C3 connections, the first diode D1 and 3rd resistor R3
Connection, the first diode D1 and the 4th resistance R4 connections, 3rd resistor R3 and the 4th resistance R4 are in parallel, first resistor R1 and second
Resistance R2 connections, key switch S7 and single-chip microcomputer U1 connections.
The model of single-chip microcomputer can be C8051F340 types, so reduce cost.
The single-chip microcomputer is the low pressure difference linear voltage regulator chip that Infrared Hand-Held machine is powered, and so reduces cost.
One end of first electric capacity and the power supply connection of a microcontroller, it is so convenient to be powered.
One end of the single-chip microcomputer and the positive pole connection of a lithium battery, so convenient power supply.
Operation principle of the present utility model is as follows：Single-chip microcomputer U1 is LDO (the low pressure difference linearity voltage stabilizings that Infrared Hand-Held machine is powered
Device) chip, it is with first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4, the first diode D1, the 3rd electric capacity
C3, key switch S7 together constitute switching on and shutting down control circuit, and BV+ is the positive pole of lithium battery, and VCC is MCU's (microcontroller)
Power supply, the first electric capacity C1 and the second electric capacity C2 are filter capacitor.VCC_0N controls for MCU (microcontroller) high level output
Pin, ON/OFF is MCU (microcontroller) external level signal detection pin.
Original state, when key switch S7 is not pressed, the switch control of single-chip microcomputer U1 chips enables pin octal and passed through
First resistor R1, second resistance R2 are connected in series to ground, are low level.LDO (low pressure difference linear voltage regulator) chip does not start, and VCC is supplied
Electricity is without output, and MCU (microcontroller) does not work.
Start control, when key switch S7 is pressed, BV+ passes through key switch S7,3rd resistor R3, R4 points of the 4th resistance
Pressure, by the first diode D1, then by first resistor R1, second resistance R2 partial pressures, feeding LDO (low pressure difference linear voltage regulator)
Octal control enable pin, the pin is high level, and LDO (low pressure difference linear voltage regulator) starts, and VCC powers output, MCU (micro-controls
Device processed) on bring into operation after electricity initialization program, VCC_ON output high level, the startup to maintain LDO, and MCU (microcontrollers
Device) power supply be always maintained at output (even if key switch S7 unclamp, due to the presence of this level, MCU also always have power supply tie up
Hold).
Shutdown control, after single-chip microcomputer operation, ON/OFF pin levels can be detected always.High electricity is maintained when detecting the signal
When flat more than two seconds, power-off operation is identified as.MCU (microcontroller) is kept after internal operation data, revocation VCC_ON dimensions
Signal is held, cyclic program is waited into shutdown.Closure of MCU (microcontroller) power supplies completely by key switch S7 now is controlled
There is provided, once key switch S7 disconnects, the high level signal of LDO (low pressure difference linear voltage regulator) control pin disappears, and VCC outputs disappear
Lose, MCU (microcontroller) dead electricity, so as to realize shutdown control.
In summary, the utility model is coordinated MCU (microcontroller) controls, is realized battery using a key switch
The switching on and shutting down that the Infrared Hand-Held machine of power supply is fully powered-off are controlled, and the standby current of whole Infrared Hand-Held machine is minimum, and the time is greatly
It is long, extend the service life of lithium battery.
Particular embodiments described above, to the technical problem, technical scheme and beneficial effect of solution of the present utility model
It is further described, should be understood that and the foregoing is only specific embodiment of the utility model, not
For limiting the utility model, all any modifications within spirit of the present utility model and principle, made, equivalent substitution, change
Enter, should be included within protection domain of the present utility model.
Claims (4)
1. a kind of use touch-switch realizes the switching on and shutting down power supply circuit for completely cutting through power supply, it is characterised in that it includes first
Resistance, second resistance, 3rd resistor, the 4th resistance, single-chip microcomputer, the first electric capacity, the second electric capacity, the 3rd electric capacity, the first diode,
Key switch, single-chip microcomputer and the first capacitance connection, single-chip microcomputer one end ground connection, the second electric capacity and the 3rd electric capacity are in parallel, first resistor
With the 3rd capacitance connection, the first diode and 3rd resistor connection, the first diode and the connection of the 4th resistance, 3rd resistor and the
Four resistor coupled in parallel, first resistor and second resistance connection, key switch and single-chip microcomputer connection.
2. realizing the switching on and shutting down power supply circuit for completely cutting through power supply using touch-switch as claimed in claim 1, its feature exists
In the single-chip microcomputer is the low pressure difference linear voltage regulator chip that Infrared Hand-Held machine is powered.
3. realizing the switching on and shutting down power supply circuit for completely cutting through power supply using touch-switch as claimed in claim 1, its feature exists
In the power supply connection of one end of first electric capacity and a microcontroller.
4. realizing the switching on and shutting down power supply circuit for completely cutting through power supply using touch-switch as claimed in claim 1, its feature exists
In the positive pole connection of one end of the single-chip microcomputer and a lithium battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720107478.3U CN206490663U (en) | 2017-02-04 | 2017-02-04 | The switching on and shutting down power supply circuit for completely cutting through power supply is realized using touch-switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720107478.3U CN206490663U (en) | 2017-02-04 | 2017-02-04 | The switching on and shutting down power supply circuit for completely cutting through power supply is realized using touch-switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206490663U true CN206490663U (en) | 2017-09-12 |
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ID=59767475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720107478.3U Expired - Fee Related CN206490663U (en) | 2017-02-04 | 2017-02-04 | The switching on and shutting down power supply circuit for completely cutting through power supply is realized using touch-switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206490663U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108132703A (en) * | 2017-12-07 | 2018-06-08 | 苏州大学 | A kind of multifunction push key circuit and its implementation |
-
2017
- 2017-02-04 CN CN201720107478.3U patent/CN206490663U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108132703A (en) * | 2017-12-07 | 2018-06-08 | 苏州大学 | A kind of multifunction push key circuit and its implementation |
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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: 20170912 Termination date: 20180204 |
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| CF01 | Termination of patent right due to non-payment of annual fee |