CN207265995U - It is a kind of to use the key switch electromechanics road with ena-bung function linear voltage regulator - Google Patents
It is a kind of to use the key switch electromechanics road with ena-bung function linear voltage regulator Download PDFInfo
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- CN207265995U CN207265995U CN201721416791.1U CN201721416791U CN207265995U CN 207265995 U CN207265995 U CN 207265995U CN 201721416791 U CN201721416791 U CN 201721416791U CN 207265995 U CN207265995 U CN 207265995U
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Abstract
The utility model discloses a kind of using the key switch electromechanics road with ena-bung function linear voltage regulator, including the first capacitance C1, the second capacitance C2, the 3rd capacitance C3, the 4th capacitance C4, first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4, the 5th resistance R5, the first diode D1, the second diode D2, field-effect tube Q1, NPN type triode Q2, key switch SW1 and the linear voltage regulator U1 with ena-bung function.Applied to on/off circuit technical field, overcome in the prior art design structure existing for a key switch electromechanics road it is all cumbersome, the shortcomings that electronic component used is more, of high cost.
Description
Technical field
On/off circuit technical field is the utility model is related to, more particularly, to one kind using linearly steady with ena-bung function
One key switch electromechanics road of depressor.
Background technology
Mobile terminal makes mobile communication terminal refer to the computer equipment that can be used on the move, and broad sense says bag
Include mobile phone, notebook, tablet computer or even include vehicle-mounted computer.As network and technology are towards more and more broadband direction
Development, Mobile Communication Industry will move towards the real mobile message epoch.On the other hand, with the hair at full speed of integrated circuit technique
Exhibition, the disposal ability of mobile terminal have had powerful disposal ability, and mobile terminal becomes from simple call instrument
For an integrated information processing platform.This also adds broader development space to mobile terminal.
One key switch electromechanics road be widely used in mobile terminal and other use a key switch machine electronic equipment.My company
Recognized by market survey and user feedback, currently commercially design structure existing for a key switch electromechanics road is all more numerous
Lock and electronic component used it is more, it is of high cost the shortcomings that.
Utility model content
In order to overcome in the prior art design structure existing for a key switch electromechanics road it is cumbersome, electronic component used is more, into
The shortcomings that this is high.The utility model provides a kind of using the key switch electromechanics road with ena-bung function linear voltage regulator, profit
Triode opening is controlled with the state of product main control unit detection key switch, and then controls field-effect tube opening state
State, finally realizes the power on/off function of product.
Technical solution is used by the utility model solves the problems, such as：It is a kind of to use with ena-bung function linear voltage regulator
One key switch electromechanics road, including the first capacitance C1, the second capacitance C2, the 3rd capacitance C3, the 4th capacitance C4, first resistor R1,
Two resistance R2,3rd resistor R3, the 4th resistance R4, the 5th resistance R5, the first diode D1, the second diode D2, field-effect tube
Q1, NPN type triode Q2, key switch SW1 and linear voltage regulator U1；
Wherein, the first capacitance C1 and second capacitance C2 one end are grounded, the first capacitance C1 and the second capacitance C2 other ends
Meet the output pin VOUT of linear voltage regulator U1 and be connected to the power end VCC of product main control unit；
The 3rd capacitance C3 and the 4th capacitance C4 one end are grounded, the 3rd capacitance C3 and the 4th another terminated lines of capacitance C4
The input pin VIN of voltage-stablizer U1 is simultaneously connected to field-effect tube Q1 source electrodes；
The enable pin CE of the linear voltage regulator U1 is connected with input pin VIN, the insurance pin of linear voltage regulator U1
VSS is grounded；
The first resistor R1 mono- terminates field-effect tube Q1 drain electrodes and positive pole POWER INPUT, first resistor R1 are another
One end is connected to the first pins of key switch SW1 1；
The key switch SW1 is automatically reset switch, including the first pin 1 and the second pin 2, pushes button switch
The first pin 1 and the second pin 2 turn on during SW1, and the first pin 1 and the second pin 2 disconnect when unclamping key switch SW1, and second
Pin 2 connects the first diode D1 cathodes, and is connected to the detection pin EN POWER of product main control unit；
The anode of the first diode D1 connects the anode of the second diode D2 and one end of 3rd resistor R3,3rd resistor
R3 is another to terminate to NPN triode Q2 base stages, NPN triode Q2 emitters ground connection；
The second resistance R2 mono- terminates field-effect tube Q1 drain electrodes, another termination NPN triode Q2 current collections of second resistance R2
Pole and field-effect tube Q1 grids；
The 4th resistance R4 mono- terminates the first diode D1 cathodes, the 4th resistance R4 other ends ground connection；
The 5th resistance R5 mono- terminates the second diode D2 cathodes and is connected to the control pin POWER of product main control unit
ON/OFF, the 5th resistance R5 other ends ground connection.
Further, the first diode D1 and the second diode D2 is switching mode diode.
Further, the size of the first resistor R1 is 1500 ohm, and the size of 3rd resistor R3 is 3900 ohm, the 5th
The size of resistance R5 is 10000 ohm.
Further, the field-effect tube Q1 is P-channel enhancement type FET.
The beneficial effects of the utility model are, above-mentioned a kind of using the key switch machine with ena-bung function linear voltage regulator
Circuit, triode opening is controlled using the state of product main control unit detection key switch, and then controls field-effect tube
Opening, finally realizes the power on/off function of product.With circuit parameter, simple in structure, component kind, quantity are few, low work(
The characteristics of consumption, low cost, high reliability.
Brief description of the drawings
The utility model is further illustrated with reference to the accompanying drawings and examples.
Fig. 1 is a kind of principle using the key switch electromechanics road with ena-bung function linear voltage regulator of the utility model
Figure.
Embodiment
As shown in Figure 1, the utility model provides a kind of key switch electromechanics used with ena-bung function linear voltage regulator
Road, it is a kind of using with ena-bung function linear voltage regulator a key switch electromechanics road, including the first capacitance C1, the second capacitance C2,
3rd capacitance C3, the 4th capacitance C4, first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4, the 5th resistance R5,
First diode D1, the second diode D2, field-effect tube Q1, NPN type triode Q2, key switch SW1 and there is ena-bung function
Linear voltage regulator U1；
Wherein, the first capacitance C1 and second capacitance C2 one end are grounded, the first capacitance C1 and second another terminated lines of capacitance C2
The output pin VOUT of property voltage-stablizer U1 is simultaneously connected to the power end VCC of product main control unit；3rd capacitance C3 and the 4th capacitance C4
One end is grounded, and the input pin VIN of the 3rd capacitance C3 and another terminated line voltage-stablizer U1 of the 4th capacitance C4 are simultaneously connected to field-effect
Pipe Q1 source electrodes；The enable pin CE of linear voltage regulator U1 is connected with input pin VIN, the insurance pin VSS of linear voltage regulator U1
Ground connection；First resistor R1 mono- terminates field-effect tube Q1 drain electrodes and positive pole POWER INPUT, and first resistor R1 is another to be connected to
The first pins of key switch SW1 1；Key switch SW1 is automatically reset switch, including the first pin 1 and the second pin 2, is pressed
The first pin 1 and the second pin 2 turn on during lower key switch SW1, the first pin 1 and the second pin 2 when unclamping key switch SW1
Disconnect, the second pin 2 connects the first diode D1 cathodes, and is connected to the detection pin EN POWER of product main control unit；One or two
The anode of pole pipe D1 connects the anode of the second diode D2 and one end of 3rd resistor R3, and 3rd resistor R3 is another to terminate to NPN tri-
Pole pipe Q2 base stages, NPN triode Q2 emitters ground connection；Second resistance R2 mono- terminates field-effect tube Q1 drain electrodes, and second resistance R2 is another
One termination NPN triode Q2 collectors and field-effect tube Q1 grids；4th resistance R4 mono- the first diode D1 cathodes of termination, the 4th
The resistance R4 other ends are grounded；5th resistance R5 mono- terminates the second diode D2 cathodes and is connected to the control pin of product main control unit
POWER ON/OFF, the 5th resistance R5 other ends ground connection.
To be preferably switching mode diode, first resistor R1 is preferably small greatly to be first diode D1 and the second diode D2
1500 ohm, the preferable sizes of 3rd resistor R3 are 3900 ohm, and the 5th preferable sizes of resistance R5 are 10000 ohm, field effect
Should pipe Q1 be preferably P-channel enhancement type FET.
The implementation process of the utility model：
The detection pin EN POWER of product main control unit, for detecting the state of key switch SW1, product main control unit
Control pin POWER ON/OFF control NPN triodes Q2 open and shut off state, so as to control the switching on and shutting down shape of product
State.
When product is in off-mode, i.e. power end VCC Non voltage outputs of product main control unit push button switch
The first pin 1 of SW1, key switch SW1 and the second pin 2 conducting closure, the electric energy of positive pole POWER INPUT flow through the
One resistance R1, key switch SW1, the first diode D1 and 3rd resistor R3 reach the base stage of NPN triode Q2, make tri- poles of NPN
The collector and emitter conducting of pipe Q2, and then field-effect tube Q1 grids are low level, the drain electrode of field-effect tube Q1 and source electrode are led
Logical, the electric energy of positive pole POWERINPUT flows to source electrode by field-effect tube Q1 drain electrodes, by the 3rd capacitance C3 and the 4th capacitance
The whole ripples of C4, flow into the input pin VIN and enable pin CE of linear voltage-stabilizing device U1, linear voltage stabilization device U1 output pins VOUT
Start to export electric energy, after the first capacitance C1 and the second capacitance C2 filtering, be delivered to the power end VCC of product main control unit.
Product main control unit start to work and scan the detection pin EN POWER of product main control unit low and high level letter
Number, when detection pin EN POWER are high level, main control unit internal processes will detect pin EN POWER flag bits and add 1 (just
Initial value is that 0), when programmed logic judges EN POWER=1, control foot POWER ON/OFF export high level.At this time, the one or two pole
Pipe D1 is simultaneously turned on the second diode D2, and when key switch SW1 is disconnected, detection pin EN POWER states are low level,
Controlling pin POWER ON/OFF signals to flow through the second diode D2 and 3rd resistor R3 makes the base stage of NPN triode Q2 be high electricity
Flat, the collector and emitter of NPN triode Q2 tends to remain on, and then keeps the drain electrode of field-effect tube Q1 and source electrode to lead
It is logical, it is final to keep product continually and steadily to run, complete boot action.
When product is in open state, i.e. the power end VCC of product main control unit has voltage output, pushes button switch
The first pin 1 of SW1, key switch SW1 and the second pin 2 conducting closure, the electric energy of positive pole POWER INPUT flow through the
One resistance R1 and key switch SW1, makes detection pin EN POWER signal condition high level, at this time the first diode D1 and second
Diode D2 is simultaneously turned on, and product keeps normal operation.When product main control unit scanning to detection pin EN POWER is high electricity
Usually, main control unit internal processes add 1, when programmed logic judges EN POWER=2 again by pin EN POWER flag bits are detected,
Control foot POWER_ON/OFF output low levels simultaneously reset EN POWER, and the second diode D2 is in cut-off state at this time.When
When key switch SW1 is disconnected, detection pin EN POWER are low level, and the first diode D1 ends, the base stage of NPN triode Q2
For low level, the collector and emitter of NPN triode Q2 is off-state, the drain electrode of field-effect tube Q1 and source electrode deenergization
The electric energy of cathode POWER INPUT can not be flowed into the input pin VIN and enable pin CE of linear voltage regulator U1, linear voltage stabilization
The output pin VOUT of device U1 is unable to out-put supply, the power end VCC loss of voltage of product main control unit, and then product and stops work
Make, complete shutdown action.
In order to ensure product is in off-mode, field-effect tube Q1 is completely in cut-off state, the utility model effect on the scene
Second resistance R2 should be added between the drain and gate of pipe Q1, to ensure the grid of field-effect tube Q1 as high level, in cutting
Only state.
One embodiment of the utility model is described in detail above, but the content is only the utility model
Preferred embodiment, it is impossible to be construed as limiting the scope of the utility model.It is all to be made according to application scope of the utility model
All the changes and improvements etc., should all still belong within the patent covering scope of the utility model.
Claims (4)
- It is 1. a kind of using the key switch electromechanics road with ena-bung function linear voltage regulator, it is characterised in that：Including the first capacitance C1, the second capacitance C2, the 3rd capacitance C3, the 4th capacitance C4, first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4, the 5th resistance R5, the first diode D1, the second diode D2, field-effect tube Q1, NPN type triode Q2, key switch SW1 With linear voltage regulator U1；Wherein, the first capacitance C1 and second capacitance C2 one end are grounded, the first capacitance C1 and second another terminated lines of capacitance C2 The output pin VOUT of property voltage-stablizer U1 is simultaneously connected to the power end VCC of product main control unit；The 3rd capacitance C3 and the 4th capacitance C4 one end are grounded, the 3rd capacitance C3 and another terminated line voltage stabilizings of the 4th capacitance C4 The input pin VIN of device U1 is simultaneously connected to field-effect tube Q1 source electrodes；The enable pin CE of the linear voltage regulator U1 is connected with input pin VIN, and the insurance pin VSS of linear voltage regulator U1 connects Ground；The first resistor R1 mono- terminates field-effect tube Q1 drain electrodes and positive pole POWER INPUT, the first resistor R1 other ends It is connected to the first pins of key switch SW1 1；The key switch SW1 is automatically reset switch, including the first pin 1 and the second pin 2, pushes button switch SW1 When the first pin 1 and the second pin 2 turn on, unclamp key switch SW1 when the first pin 1 and the second pin 2 disconnect, the second pin 2 connect the first diode D1 cathodes, and are connected to the detection pin EN POWER of product main control unit；The anode of the first diode D1 connects the anode of the second diode D2 and one end of 3rd resistor R3, and 3rd resistor R3 is another One end is connected to NPN triode Q2 base stages, NPN triode Q2 emitters ground connection；The second resistance R2 mono- terminates field-effect tube Q1 drain electrodes, another termination NPN triode Q2 collectors of second resistance R2 and Field-effect tube Q1 grids；The 4th resistance R4 mono- terminates the first diode D1 cathodes, the 4th resistance R4 other ends ground connection；The 5th resistance R5 mono- terminates the second diode D2 cathodes and is connected to the control pin POWER ON/ of product main control unit OFF, the 5th resistance R5 other ends ground connection.
- 2. according to claim 1 a kind of using the key switch electromechanics road with ena-bung function linear voltage regulator, it is special Sign is：The first diode D1 and the second diode D2 is switching mode diode.
- 3. according to claim 1 a kind of using the key switch electromechanics road with ena-bung function linear voltage regulator, it is special Sign is：The size of the first resistor R1 is 1500 ohm, and the size of 3rd resistor R3 is 3900 ohm, the 5th resistance R5's Size is 10000 ohm.
- 4. according to claim 1 a kind of using the key switch electromechanics road with ena-bung function linear voltage regulator, it is special Sign is：The field-effect tube Q1 is P-channel enhancement type FET.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721416791.1U CN207265995U (en) | 2017-10-27 | 2017-10-27 | It is a kind of to use the key switch electromechanics road with ena-bung function linear voltage regulator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721416791.1U CN207265995U (en) | 2017-10-27 | 2017-10-27 | It is a kind of to use the key switch electromechanics road with ena-bung function linear voltage regulator |
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| CN207265995U true CN207265995U (en) | 2018-04-20 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108649940A (en) * | 2018-05-16 | 2018-10-12 | 四川斐讯信息技术有限公司 | A kind of singly-bound power on-off control circuit and its control method |
| CN110488725A (en) * | 2019-09-24 | 2019-11-22 | 天津七一二通信广播股份有限公司 | A kind of subway facility switching circuit |
-
2017
- 2017-10-27 CN CN201721416791.1U patent/CN207265995U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108649940A (en) * | 2018-05-16 | 2018-10-12 | 四川斐讯信息技术有限公司 | A kind of singly-bound power on-off control circuit and its control method |
| CN108649940B (en) * | 2018-05-16 | 2022-01-14 | 哈尔滨宇龙自动化有限公司 | Single-key power switch control circuit and control method thereof |
| CN110488725A (en) * | 2019-09-24 | 2019-11-22 | 天津七一二通信广播股份有限公司 | A kind of subway facility switching circuit |
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