CN206211962U - Power on-off control circuit - Google Patents
Power on-off control circuit Download PDFInfo
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- CN206211962U CN206211962U CN201621249873.7U CN201621249873U CN206211962U CN 206211962 U CN206211962 U CN 206211962U CN 201621249873 U CN201621249873 U CN 201621249873U CN 206211962 U CN206211962 U CN 206211962U
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Abstract
The utility model discloses a kind of power on-off control circuit, including：First control module, the first power switching module, the second control module, second source switch module and the control signal being connected for the universal input and output port with controller；Control signal input respectively with first control module, the input of second control module are connected, the output end of first control module is connected with the input of first power switching module, and the output end of second control module is connected with the input of the second source switch module.Using the utility model, the priority sequential that same I/O port controls two power switch circuits to be electricity on peripheral power supply unit can be shared.
Description
Technical field
The utility model is related to electronic circuit technology field, and in particular to a kind of power on-off control circuit.
Background technology
In the prior art for same power supply, to module for power supply different in system, corresponding power switch electricity is set
Road is different module for power supply, and whether turning on for system I/O port control power switch circuit can be supplied to the module in system excessively
Electricity, it is electricity on a peripheral power supply unit (module in system) that typically one I/O port controls a power switch circuit, this
Sample can conveniently be controlled to the sequential of electricity on peripheral power supply unit.But when having multiple modules in system, shared I/O port
Resource is excessive, and the priority sequential of electricity on peripheral power supply unit is controlled to reach, it is impossible to while sharing I/O port to save IO
Mouth resource.
Utility model content
The purpose of this utility model is to provide a kind of power on-off control circuit, can share same I/O port and control two
Power switch circuit is the priority sequential of electricity on peripheral power supply unit.
To solve above technical problem, the utility model provides a kind of power on-off control circuit, including：First control mould
Block, the first power switching module, the second control module, second source switch module and for controller universal input output
The control signal of port connection；
Control signal input, the input of second control module respectively with first control module
Connection, the output end of first control module is connected with the input of first power switching module, second control
The output end of module is connected with the input of the second source switch module.
Further, first control module includes direct voltage source, first resistor and second resistance；
The direct voltage source is connected by the first resistor with the input of first control module, and described second
One end of resistance is connected with the input of first control module, and the other end of the second resistance and described first controls mould
The output end connection of block.
Further, second control module includes 3rd resistor, the 4th resistance；
One end of the 3rd resistor is connected with the input of second control module, the other end of the 3rd resistor
Output end with second control module is connected；One end of 4th resistance connects with the output end of second control module
Connect, the other end of the 4th resistance is connected to ground.
Further, first power switching module is identical with the circuit structure of the second source switch module.
Further, first power switching module has energization input and power supply output end；First power supply
Switch module includes first switch pipe, second switch pipe and the 5th resistance；
The first end of the first switch pipe is connected with the input of first power switching module, the first switch
Second end of pipe is connected with one end of the 5th resistance, and the other end of the 5th resistance is connected with energization input；
The first end of the second switch pipe is connected with the second end of the first switch pipe, and the of the second switch pipe
Two ends are connected with the energization input of first power switching module, the 3rd end of the second switch pipe and described first electricity
The power supply output end connection of source switch module.
Further, the first switch pipe is NPN triode；The first end of the first switch pipe is NPN triode
Base stage, the second end of the first switch pipe is the colelctor electrode of NPN triode, and the 3rd end of the first switch pipe is NPN
The emitter stage of triode.
Yet further, the second switch pipe is P-channel metal-oxide-semiconductor；The first end of the second switch pipe is P-channel
The grid of metal-oxide-semiconductor, the second end of the second switch pipe is the source electrode of P-channel metal-oxide-semiconductor, and the 3rd end of the second switch pipe is
The drain electrode of P-channel metal-oxide-semiconductor.
Further, first power switching module also includes the 6th resistance and the first electric capacity；
One end of first electric capacity is connected with the second end of the second switch pipe, the other end of first electric capacity with
The first end connection of the second switch pipe；
The first end of the second switch pipe is connected with the second end of the first switch pipe, specially：Described second opens
The first end for closing pipe is connected by the 6th resistance with the second end of the first switch pipe.
Compared to prior art, a kind of beneficial effect of power on-off control circuit of the present utility model is：
The power on-off control circuit that the utility model is provided, respectively two power switching modules provide a control mould
Block, the two control modules are jointly controlled to be formed on same universal input and output port, for the same signal being input into, two
Control module control respectively from corresponding power switching module conducting whether, and then realize sharing same I/O port control
The priority sequential of electricity on two power switch circuits.
Brief description of the drawings
Fig. 1 is the structural representation of the one embodiment for the power on-off control circuit that the utility model is provided；
Fig. 2 is the structural representation of another embodiment of the power on-off control circuit that the utility model is provided.
Specific embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, 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 for being obtained, belongs to the scope of the utility model protection.
Fig. 1 is referred to, is the structural representation of the one embodiment for the power on-off control circuit that the utility model is provided；
The utility model provides a kind of power on-off control circuit, including：First control module 10, the first power switch mould
Block 20, the second control module 30, second source switch module 40 and it is connected for the universal input and output port with controller
Control signal GPIO；
Control signal GPIO input, second control modules 30 respectively with first control module 10
Input connection, the output end of first control module 10 is connected with the input of first power switching module 20,
The output end of second control module 30 is connected with the input of the second source switch module 40.
Fig. 2 is referred to, is the structural representation of another embodiment of the power on-off control circuit that the utility model is provided
Figure；
Further, first control module 10 includes direct voltage source STB, first resistor R1 and second resistance R2；
The direct voltage source STB is connected by the first resistor R1 with the input of first control module 10,
One end of the second resistance R2 is connected with the input of first control module 10, the other end of the second resistance R2 with
The output end connection of first control module 10.
Further, second control module 30 includes 3rd resistor R3, the 4th resistance R4；
One end of the 3rd resistor R3 is connected with the input of second control module 30, the 3rd resistor R3's
The other end is connected with the output end of second control module 30；One end of the 4th resistance R4 and second control module
30 output end connection, the other end of the 4th resistance R4 is connected to ground.
Further, the circuit structure phase of first power switching module 20 and the second source switch module 40
Together.
Further, first power switching module 20 has energization input PVCC and power supply output end VCC1；Institute
Stating the first power switching module 20 includes first switch pipe Q1, second switch pipe Q2 and the 5th resistance R5；
The first end of the first switch pipe Q1 is connected with the input of first power switching module 20, and described first
Second end of switching tube Q1 is connected with one end of the 5th resistance R5, the other end and energization input of the 5th resistance R5
PVCC is connected；
The first end of the second switch pipe Q2 is connected with second end of the first switch pipe Q1, the second switch pipe
Second end of Q2 is connected with the energization input PVCC of first power switching module 20, and the 3rd of the second switch pipe Q2 the
End is connected with the power supply output end VCC1 of first power switching module 20.
Further, the first switch pipe Q1 is NPN triode；The first end of the first switch pipe Q1 is NPN tri-
The base stage of pole pipe, second end of the first switch pipe Q1 is the colelctor electrode of NPN triode, the 3rd of the first switch pipe Q1 the
Hold the emitter stage for NPN triode.
Yet further, the second switch pipe Q2 is P-channel metal-oxide-semiconductor；The first end of the second switch pipe Q2 is P ditches
The grid of road metal-oxide-semiconductor, second end of the second switch pipe Q2 is the source electrode of P-channel metal-oxide-semiconductor, the of the second switch pipe Q2
Three ends are the drain electrode of P-channel metal-oxide-semiconductor.
Further, first power switching module 20 also includes the 6th resistance R6 and the first electric capacity C1；
One end of the first electric capacity C1 is connected with second end of the second switch pipe Q2, and the first electric capacity C1's is another
One end is connected with the first end of the second switch pipe Q2；
The first end of the second switch pipe Q2 is connected with second end of the first switch pipe Q1, specially：Described
The first end of two switching tube Q2 is connected by the 6th resistance R6 with second end of the first switch pipe Q1.
It should be noted that due to the circuit structure and the electricity of the first power switching module 20 of second source switch module 40
Line structure, thus Fig. 2 is can be found in, this is no longer going to repeat them its concrete structure.
It is the system power supply of television board with the first power switching module 20 below with reference to the embodiment that Fig. 2 is provided, the
As a example by two power switching modules 40 are powered for the LVDS power supplys of television board, operation principle of the present utility model is specifically described：
When the signal of universal input and output port output to control signal GPIO is high-impedance state signal, due to the first control
Molding block 10 there is provided direct voltage source STB and pull-up resistor (first resistor R1) so that the output of the first control module 10
It is high level so that the input of the first power switching module 20 is high level, then the base stage of NPN type triode Q1 is electricity high
It is flat so that NPN type triode Q1 is turned on, the drop-down ground connection of colelctor electrode of NPN type triode Q1, it is low level, and then the first power supply
The grid of the P-channel metal-oxide-semiconductor Q2 of switch module 20 is low level, P-channel metal-oxide-semiconductor Q2 conductings so that the first power switching module
The power supply of 20 energization input PVCC connections is the system power supply of the television board of power supply output end VCC1 connections；It is same with this
When, due to the second control module 30 provide 3rd resistor R3 and the 4th resistance R4 partial pressures in the case of, and second control mould
The input input of block 30 is high-impedance state signal so that the voltage of the output end of the second control module 30 after partial pressure is less than the
The conducting voltage of the NPN type triode Q3 of two power switching modules 40, i.e. NPN type triode Q3 are ended, then NPN type triode Q3
Collector voltage be pulled upward to the voltage of energization input PVCC, be high level, so second source switch module 40 P-channel
The grid of metal-oxide-semiconductor Q4 is high level, P-channel metal-oxide-semiconductor Q4 cut-offs so that the energization input PVCC of second source switch module 40
The power supply of connection cannot be that the LVDS power supplys of the television board of power supply output end VCC1 connections are powered.
When universal input and output port output is converted into high level to the signal of control signal GPIO from high-impedance state signal
During signal, the input of the first power switching module 20 is high level, then the base stage of NPN type triode Q1 is high level so that
NPN type triode Q1 is turned on, and the drop-down ground connection of colelctor electrode of NPN type triode Q1 is low level, and then the first power switching module
The grid of 20 P-channel metal-oxide-semiconductor Q2 is low level, P-channel metal-oxide-semiconductor Q2 conductings so that the power supply of the first power switching module 20
The power supply of input PVCC connections is the system power supply of the television board of power supply output end VCC1 connections；At the same time, due to
The input input of two control modules 30 is high level, even after after 3rd resistor R3 and the 4th resistance R4, the second control
Conducting voltage of the voltage of the output end of molding block 30 higher than the NPN type triode Q3 of second source switch module 40, i.e. this NPN
Type triode Q3 is turned on, then the drop-down ground connection of the colelctor electrode of NPN type triode Q3, is low level, and then second source switch module
The grid of 40 P-channel metal-oxide-semiconductor Q4 is low level, P-channel metal-oxide-semiconductor Q4 conductings so that the power supply of second source switch module 40
The power supply of input PVCC connections is that the LVDS power supplys of the television board of power supply output end VCC1 connections are powered.So that can be by control
The time of universal input and output port output high-impedance state signal processed pulls open the LVDS of system and television board for television board
Power supply power supply timing is spaced.
The power on-off control circuit that the utility model is provided, respectively two power switching modules provide a control mould
Block, the two control modules it is common it is controlled is formed on same universal input and output port, for be input into high-impedance state signal when, the
One control module 1 controls the conducting of the first power switching module, the control second source switch module cut-off of the second control module；And
When the signal of input is converted into high level signal by high-impedance state signal, the first control module continues to the first power switching module
Conducting, and the second control module control second source switching molding 0 switchs to conducting by cut-off, it is shared same general defeated so as to reach
Enter output port to realize that two power switching modules are sequential electric on peripheral power supply unit.
The above is preferred embodiment of the present utility model, it is noted that for the ordinary skill of the art
For personnel, on the premise of the utility model principle is not departed from, some improvements and modifications can also be made, these improve and moisten
Decorations are also considered as protection domain of the present utility model.
Claims (8)
1. a kind of power on-off control circuit, it is characterised in that including：First control module, the first power switching module, second
Control module, second source switch module and the control signal being connected for the universal input and output port with controller；
Control signal input, the input company of second control module respectively with first control module
Connect, the output end of first control module is connected with the input of first power switching module, the second control mould
The output end of block is connected with the input of the second source switch module.
2. power on-off control circuit as claimed in claim 1, it is characterised in that first control module includes direct current
Potential source, first resistor and second resistance；
The direct voltage source is connected by the first resistor with the input of first control module, the second resistance
One end be connected with the input of first control module, the other end of the second resistance and first control module
Output end is connected.
3. power on-off control circuit as claimed in claim 1, it is characterised in that second control module includes the 3rd electricity
Resistance, the 4th resistance；
One end of the 3rd resistor is connected with the input of second control module, the other end of the 3rd resistor and institute
State the output end connection of the second control module；One end of 4th resistance is connected with the output end of second control module,
The other end of the 4th resistance is connected to ground.
4. power on-off control circuit as claimed in claim 1, it is characterised in that first power switching module with it is described
The circuit structure of second source switch module is identical.
5. power on-off control circuit as claimed in claim 4, it is characterised in that first power switching module has and supplies
Electrical input and power supply output end；First power switching module includes first switch pipe, second switch pipe and the 5th resistance；
The first end of the first switch pipe is connected with the input of first power switching module, the first switch pipe
Second end is connected with one end of the 5th resistance, and the other end of the 5th resistance is connected with energization input；
The first end of the second switch pipe is connected with the second end of the first switch pipe, the second end of the second switch pipe
Energization input with first power switching module is connected, and the 3rd end and first power supply of the second switch pipe are opened
Close the power supply output end connection of module.
6. power on-off control circuit as claimed in claim 5, it is characterised in that the first switch pipe is NPN triode；
The first end of the first switch pipe is the base stage of NPN triode, and the second end of the first switch pipe is the collection of NPN triode
Electrode, the 3rd end of the first switch pipe is the emitter stage of NPN triode.
7. power on-off control circuit as claimed in claim 5, it is characterised in that the second switch pipe is P-channel MOS
Pipe；The first end of the second switch pipe is the grid of P-channel metal-oxide-semiconductor, and the second end of the second switch pipe is P-channel MOS
The source electrode of pipe, the 3rd end of the second switch pipe is the drain electrode of P-channel metal-oxide-semiconductor.
8. power on-off control circuit as claimed in claim 5, it is characterised in that first power switching module also includes
6th resistance and the first electric capacity；
One end of first electric capacity is connected with the second end of the second switch pipe, the other end of first electric capacity with it is described
The first end connection of second switch pipe；
The first end of the second switch pipe is connected with the second end of the first switch pipe, specially：The second switch pipe
First end be connected with the second end of the first switch pipe by the 6th resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621249873.7U CN206211962U (en) | 2016-11-18 | 2016-11-18 | Power on-off control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621249873.7U CN206211962U (en) | 2016-11-18 | 2016-11-18 | Power on-off control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206211962U true CN206211962U (en) | 2017-05-31 |
Family
ID=58749649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621249873.7U Active CN206211962U (en) | 2016-11-18 | 2016-11-18 | Power on-off control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206211962U (en) |
-
2016
- 2016-11-18 CN CN201621249873.7U patent/CN206211962U/en active Active
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