CN207588827U - A kind of self-locking power switch device - Google Patents
A kind of self-locking power switch device Download PDFInfo
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- CN207588827U CN207588827U CN201721880496.1U CN201721880496U CN207588827U CN 207588827 U CN207588827 U CN 207588827U CN 201721880496 U CN201721880496 U CN 201721880496U CN 207588827 U CN207588827 U CN 207588827U
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Abstract
The utility model embodiment discloses a kind of self-locking power switch device, and above-mentioned self-locking power switch device includes：Power-supply device, self-resetting type switch, isolating diode, bleeder circuit, self-locking switch circuit and self-locking control circuit；Power-supply device is switched by self-resetting type and is connect with the input terminal of bleeder circuit；The output terminal of bleeder circuit and the signal detection end of self-locking control circuit connect；The enabled output terminal of self-locking control circuit and the control terminal of self-locking switch circuit connect；The input terminal of self-locking switch circuit and the output terminal of power-supply device connect；Self-locking control circuit exports switch enable signal corresponding with the level state that the level change state at signal detection end and enabled output terminal are current, to control self-locking switch circuit on and off；By the output terminal of self-locking switch circuit power supply is provided for equipment to be powered.While the present embodiment realizes self-locking, reduce volume of switch, reduce switch cost, be more applicable for portable device.
Description
Technical field
The utility model embodiment is related to switching technique field, and in particular to a kind of self-locking power switch device.
Background technology
At present, existing self-locking power switch device generally includes：The power-supply device of power supply has opening for auto-lock function
It closes S1,3.3V DC-DC (Direct Current-Direct Current, DC power supply-DC power supply) converters and treats
Power supply unit, as shown in Figure 1.Wherein, S1 generally uses wane type switch or self-locking button are switched, both switches have certainly
Lock function, that is, energy holding contact is closed always after pressing, and guidance is disconnected again by lower contact.
In existing self-locking power switch device, switch S1 presses contact closure, the input that battery or power supply provide
Voltage VinCause 3.3V DC-DC converter electrifying startups, 3.3V DC-DC converters output 3.3V, device power to be powered opens
It moves and starts to work.It switchs S1 to disconnect by lower contact again, the power-off of 3.3V DC-DC converters, also can not be just equipment to be powered
Continue to power, device powers down to be powered.
Since wane type switch and self-locking button volume are larger, cost is higher, is not suitable for portable device and uses.
Utility model content
Due to the above problem of the existing technology, the utility model embodiment proposes a kind of self-locking power switch dress
It puts.
In a first aspect, the utility model embodiment proposes a kind of self-locking power switch device, including：Power-supply device, from
Multiplex switch, isolating diode, bleeder circuit, self-locking switch circuit and self-locking control circuit；Wherein,
The output terminal of the power-supply device is connect with the first end that the self-resetting type switchs；
The second end of the self-resetting type switch is connect with the anode of the isolating diode；The cathode of the isolating diode
It is connect with the energization input of the self-locking control circuit；The second end of the self-resetting type switch and the input of the bleeder circuit
End connection；The output terminal of the bleeder circuit is connect with the signal detection end of the self-locking control circuit；
The enabled output terminal of the self-locking control circuit is connect with the control terminal of the self-locking switch circuit；
The input terminal of the self-locking switch circuit is connect with the output terminal of the power-supply device；
The output terminal of the self-locking switch circuit and the cathode of the isolating diode and the supply input of the microcontroller
End connection；
Wherein, the cathode of the output terminal of the self-locking switch circuit and the isolating diode, as the self-locking
The power supply output terminal of power switch device, for providing power supply for equipment to be powered；
The self-locking control circuit is exported and the level change state at signal detection end and described is made to self-locking switch circuit
The current corresponding switch enable signal of level state of energy output terminal, to control the on and off of the self-locking switch circuit.
Preferably, the self-locking power switch device further includes：DC power convertor；
Output terminal and the isolating diode of the input terminal of the DC power convertor with the self-locking switch circuit
Cathode connection；
Power supply output terminal of the output terminal of the DC power convertor as the self-locking power switch device.
Preferably, the bleeder circuit includes the first divider resistance and the second divider resistance；
Input terminal of the one end of first divider resistance as the bleeder circuit, first divider resistance it is another
End is connect with one end of second divider resistance, the other end ground connection GND of second divider resistance；
Voltage of the tie point as the bleeder circuit between first divider resistance and second divider resistance
Output terminal.
Preferably, the self-locking switch circuit includes：First switch device, third divider resistance, the 4th divider resistance and
Second switch device；
Wherein, control terminal of the first control terminal of the first switch device as the self-locking switch circuit, it is and described
The enabled output terminal connection of self-locking control circuit；
Second control termination GND of the first switch device；
The output terminal of the first switch device is connect with one end of the 4th divider resistance；
The other end of 4th divider resistance is divided with the first control terminal of the second switch device and the third
One end connection of resistance；
Input terminal of second control terminal of the second switch device as the self-locking switch circuit, sets with the power supply
Standby output terminal is connected with the other end of the third divider resistance；
Output terminal of the output terminal of the second switch device as the self-locking switch circuit；
When the switch enable signal is logic high, the first switch device and the second switch device are led
It is logical；
When the switch enable signal is logic low, the first switch device and the second switch device close
It closes.
Preferably, the first switch device is NMOS transistor；
First control terminal of the first switch device is specially the grid of the NMOS transistor；The first switch device
Second control terminal of part is specially the source electrode of the NMOS transistor；The output terminal of the first switch device is specially described
The drain electrode of NMOS transistor.
Preferably, the second switch device is PMOS transistor；
First control terminal of the second switch device is specially the grid of the PMOS transistor；The second switch device
Second control terminal of part is specially the source electrode of the PMOS transistor；The output terminal of the second switch device is specially described
The drain electrode of PMOS transistor.
Preferably, the first switch device is negative-positive-negative transistor；
First control terminal of the first switch device is specially the base stage of the negative-positive-negative transistor；Described first
Second control terminal of switching device is specially the emitter of the negative-positive-negative transistor；The output of the first switch device
End is specially the collector of the negative-positive-negative transistor.
Preferably, the second switch device is positive-negative-positive transistor；
First control terminal of the second switch device is specially the base stage of the positive-negative-positive transistor；Described second
Second control terminal of switching device is specially the emitter of the positive-negative-positive transistor；The output of the second switch device
End is specially the collector of the positive-negative-positive transistor.
Preferably, the self-locking control circuit includes：D type flip flop, phase inverter and filter capacitor；Wherein,
Signal detection end of the Clock control end of the d type flip flop as the self-locking control circuit, with the filtered electrical
One end connection of appearance；Another termination GND of the filter capacitor；
The Q output of the d type flip flop is connect with the input terminal of the phase inverter；
The output terminal of the phase inverter is connect with the D input terminals of the d type flip flop, and as the self-locking control circuit
Enabled output terminal, connect with the control terminal of the self-locking switch circuit；
Energization input of the VCC input terminals of the d type flip flop as the self-locking control circuit.
In the self-locking power switch device that the utility model embodiment provides, by setting small runback at low cost
Formula switch, self-locking switch circuit, bleeder circuit and self-locking control circuit while realizing auto-lock function, reduce volume of switch, drop
Low switch cost, is more applicable for portable device.
Description of the drawings
It in order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, other attached drawings can also be obtained according to these figures.
Fig. 1 is the structure diagram of the self-locking power switch device of the prior art；
A kind of structure diagram for self-locking power switch device that one embodiment of Fig. 2 the utility model provides；
The structure diagram for another self-locking power switch device that one embodiment of Fig. 3 the utility model provides；
Fig. 4 is the circuit diagram of a kind of bleeder circuit that one embodiment of the utility model provides；
Fig. 5 is the structure diagram of another bleeder circuit that one embodiment of the utility model provides；
Fig. 6 is the circuit diagram of a kind of self-locking switch circuit that one embodiment of the utility model provides；
Fig. 7 is the circuit diagram of self-locking control circuit that one embodiment of the utility model provides；
Fig. 8 is the circuit diagram of a kind of self-locking power switch device that one embodiment of the utility model provides.
Specific embodiment
Below in conjunction with the accompanying drawings, the specific embodiment of utility model is further described.Following embodiment is only used for more
Add and clearly demonstrate the technical solution of the utility model, and cannot the scope of protection of the utility model be limited with this.
Fig. 2 shows a kind of structure diagrams for self-locking power switch device that the utility model embodiment provides；Such as
Shown in Fig. 2, self-locking power switch device can include：Power-supply device 101, isolating diode 103, divides self-resetting type switch 102
Volt circuit 104, self-locking switch circuit 105 and self-locking control circuit 106.
Wherein, the output terminal of power-supply device 101 is connect with the first end of self-resetting type switch 102.
The second end of self-resetting type switch 102 is connect with the anode of isolating diode 103.
The cathode of isolating diode 103 is connect with the energization input of self-locking control circuit 106.
The second end of self-resetting type switch 102 is connect with the input terminal of bleeder circuit 104.
The output terminal of bleeder circuit 104 is connect with the signal detection end of self-locking control circuit 106.
The enabled output terminal of self-locking control circuit 106 is connect with the control terminal of self-locking switch circuit 105.
The input terminal of self-locking switch circuit 105 is connect with the output terminal of power-supply device 101.
The output terminal of self-locking switch circuit 105 and the supply input of the cathode of isolating diode and self-locking control circuit 106
End connection.
In the utility model embodiment, equipment of the power-supply device 101 particularly for direct current is provided, such as battery；From
Multiplex switch 102 refers to supporting to press contact closure, the switching device that release contact disconnects.
In the utility model embodiment, the output terminal of self-locking switch circuit 105 and the cathode of isolating diode 103 are made
For the power supply output terminal of self-locking power switch device, for providing power supply for equipment to be powered.Self-locking control circuit 106 is to certainly
The output of lock-switch circuit 105 is corresponding with the level state that the level change state at signal detection end and enabled output terminal are current to open
Enable signal is closed, to control the on and off of self-locking switch circuit 105, so as to fulfill the switch of self-locking power switch device
Control.
In this way, self-lock switch is controlled by switch enable signal that the enabled output terminal of self-locking control circuit 106 exports
105 on and off of circuit, it can be achieved that controlled based on the folding of self-locking switch circuit 105 equipment to be powered for power-off, and
The folding of self-resetting type switch is no longer dependent on, that is, realizes self-locking.
In the utility model embodiment, when self-locking switch circuit 105 is connected, power-supply device 101 is opened by the self-locking of conducting
Powered-down road 105 powers for self-locking control circuit 106 and equipment to be powered.And self-resetting type switch unclamps and self-locking switch circuit 105
During closing, power-supply device 101 can not be powered by self-locking switch circuit 105 for self-locking control circuit 106 and equipment to be powered.
In the utility model embodiment, isolating diode 103 is used to ensure the voltage of the output terminal of bleeder circuit 104 in pine
Opening self-resetting type switch makes contact be logic low always after disconnecting, always to patrol after pressing self-resetting type switch and making contact closure
Collect high level.
In the self-locking power switch device that the utility model embodiment provides, by setting small runback at low cost
Formula switch, self-locking switch circuit and bleeder circuit while realizing auto-lock function, reduce volume of switch, reduce switch cost, more
Add suitable for portable device.
In the utility model embodiment, the level change state at the signal detection end of self-locking control circuit includes：By logic
Low level " 0 " becomes logic high " 1 " and by logic high " 1 " to logic low " 0 ".Self-locking control circuit enables
The current level state of output terminal can include：Logic high " 1 " or logic low " 0 ".
In the utility model embodiment, the level change state at the signal detection end of self-locking control circuit is specially：By patrolling
Volume low level becomes logic high, and when the current level state of enabled output terminal is specially logic low, from lock control
The switch enable signal of the enabled output terminal output of circuit 106 is logic high, for self-locking switch circuit 105 to be controlled to lead
It is logical.
The level change state at the signal detection end of self-locking control circuit is specially：Logically high electricity is become from logic low
It is flat, and when the current level state of enabled output terminal is specially logic high, the enabled output terminal of self-locking control circuit 106 is defeated
The switch enable signal gone out is logic low, for self-locking switch circuit 105 to be controlled to close.
In the utility model embodiment, logic low refers to TTL (Transistor-Transistor Logic, crystalline substance
Transistor-transistor logic (TTL))/CMOS (Complementary Metal Oxide Semiconductor, complementary metal oxide
Semiconductor)/LVTTL (Low Voltage Transistor-Transistor Logic, low voltage transistor-transistor logic)/
LVCOMS (Low Voltage Complementary Metal Oxide Semiconductor, low pressure complementary metal oxide
Semiconductor) logic low；Logic high refers to TTL/CMOS/LVTTL/LVCOMS logic highs.For example, work as voltage
During less than 0.3V, voltage is logic low；When voltage is more than 2.5V, voltage is logic high.
The operation principle for the self-locking power switch device that the utility model embodiment described further below provides：
In the utility model embodiment, in the case where self-locking control circuit does not power on, pressing self-resetting type switch 102 makes to touch
Point is closed.
On the one hand, the input voltage V provided by power-supply device 101in, by self-resetting type switch 102 and isolating diode 103
The energization input of self-locking control circuit 106 is reached, is that self-locking control circuit 106 or equipment to be powered are powered；From lock control electricity
The state that the enabled output terminal on road 106 is current is logic low.
On the other hand, the input voltage V provided by power-supply device 101in, it is partial pressure by the self-resetting type switch 102 pressed
Circuit 104 is powered, and after the partial pressure of bleeder circuit 104, the level of the output terminal of bleeder circuit 104 is become from logic low
Logic high；Correspondingly, the level at the signal detection end of self-locking control circuit 106 changes, and level change state is served as reasons
Logic low becomes logic high, the switch enable signal hair of the enabled output terminal output of triggering self-locking control circuit 106
Changing.
In this way, before self-resetting type switch 102 is unclamped, power-supply device 101 passes through the self-resetting type switch 102 pressed and isolation
After diode 103 is powered for self-locking control circuit 106, the switch of the enabled output terminal output of self-locking control circuit 106 enables letter
Number be logic high；Self-locking switch circuit 105 is connected；Power-supply device 101 can be by the self-locking switch circuit 105 of conducting
Equipment to be powered and self-locking control circuit 106 continue to power.
In the utility model embodiment, after self-locking switch circuit 105 is connected, self-resetting type switch 101 can be unclamped.
In the utility model embodiment, after unclamping self-resetting type switch 101 and disconnecting contact, what power-supply device 101 provided
Input voltage Vin, it will be unable to reach bleeder circuit 104, therefore, the voltage of the output terminal of bleeder circuit 104 will be reduced to 0V,
So that the level at the signal detection end of self-locking control circuit 106 changes, i.e., logic low is become from logic high.
Correspondingly, the enabled output terminal of switch of self-locking control circuit 106, which still exports, belongs to the switch of logic high and makes
The level state of the enabled output terminal of switch of energy signal, i.e. self-locking control circuit 106 is maintained on logic high so that self-locking
Switching circuit 105 is held on.
After unclamping self-resetting type switch 101 and disconnecting contact, the input voltage V of the offer of power-supply device 101inIt although can not
It is powered by self-resetting type switch 102 and isolating diode for self-locking control circuit 106 and equipment to be powered, but conducting can be passed through
Self-locking switch circuit 105 power for equipment to be powered and self-locking control circuit 106, self-locking is realized, until self-locking control circuit
106 control self-locking switch circuits 105 are closed.
After unclamping self-resetting type switch 101 and disconnecting contact, self-locking switch circuit 105 that power-supply device 101 passes through conducting
During powering for equipment to be powered and self-locking control circuit 106, isolating diode 103 can play buffer action, be used for
The voltage for ensureing the output terminal of bleeder circuit 104 is always logic low after unclamping self-resetting type switch and disconnecting contact,
Pressing self-resetting type switch makes after contact closure to be always logic high, and the conducting self-locking for self-locking switch circuit 105 provides guarantor
Barrier.
In the utility model embodiment, it is continuously the offer of self-locking switch circuit 105 in self-locking control circuit 106 and belongs to logic
In the case of the switch enable signal of high level, if pressing self-resetting type switch 102 makes contact closure, provided by power-supply device 101
Input voltage Vin, powered by the self-resetting type switch 102 pressed for bleeder circuit 104, by the partial pressure of bleeder circuit 104
Afterwards, the level of the output terminal of bleeder circuit 104 is become the letter of logic high, i.e. self-locking control circuit 106 from logic low
The level of number test side changes, and becomes logic high from logic low.
Since the current level state of the enabled output terminal of self-locking control circuit 106 is logic high, triggering is certainly
The switch enable signal of the enabled output terminal output of lock control circuit 106 changes.The enabled output of self-locking control circuit 106
The switch enable signal of end output becomes logic low from logic high so that self-locking switch circuit 105 is closed.
In this way, power-supply device 101 can not by the self-locking switch circuit 105 of closing for equipment to be powered and from lock control electricity
Road 106 powers.
In the utility model embodiment, after self-locking switch circuit 105 is closed, self-resetting type switch 101 can be unclamped.It is unclamping certainly
After multiplex switch 101 disconnects contact, it is certainly that power-supply device 101, which also will be unable to through self-resetting type switch 102 and isolating diode,
Lock control circuit 106 and equipment to be powered power supply, so as to cause electric under self-locking control circuit 106 and equipment to be powered.
Further, based on above-described embodiment, as shown in figure 3, the self-locking power supply that the utility model embodiment provides is opened
It closes in device in addition to including：Power-supply device 101, self-resetting type switch 102, isolating diode 103, bleeder circuit 104, self-lock switch
Circuit 105 and self-locking control circuit 106, further include：DC power convertor 107.
In the utility model embodiment, the input terminal of DC power convertor 107 and the output terminal of self-locking switch circuit 105
It is connected with the cathode of isolating diode 103.Confession of the output terminal of DC power convertor 107 as self-locking power switch device
Electricity output end is that self-locking control circuit and equipment to be powered are powered.
In the utility model embodiment, DC power convertor 107 is used to export from the cathode of isolating diode 103
Voltage, and/or the voltage exported from the output terminal of self-locking switch circuit 105 are converted, so that self-locking power switch fills
The voltage that the power supply output terminal put provides meets equipment to be powered, and/or the requirement of self-locking control circuit 106.
In practical application, DC power convertor 107 can be specially DC-DC converter.
Further, based on above-described embodiment, as shown in figure 4, the self-locking power supply that the utility model embodiment provides is opened
It closes in device, bleeder circuit 104 includes the first divider resistance R1 and the second divider resistance R2.
Input terminal of the one end of R1 as bleeder circuit 104, the other end of R1 and one end of R2 connect, another termination of R2
GND。
Voltage output end of the tie point as bleeder circuit 104 between R1 and R2.
In the utility model embodiment, press self-resetting type switch 101 make contact closure after, provided by power-supply device 101
Input voltage Vin, will bleeder circuits 104 be reached by the self-resetting type pressed switch 102, the partial pressure through R1 and R2, the voltage on R2
Become from 0 voltThe output terminal level of bleeder circuit 104 becomes logic high from logic low.
In the utility model embodiment, after release self-resetting type switch 101 disconnects contact, provided by power-supply device 101
Input voltage Vin, will be unable to power for bleeder circuit 104 by the self-resetting type of release switch 102, therefore, R1 and R2 is upper will be without dividing
It presses, i.e. voltage on R1 is that the voltage on 0, R2 is 0, and the output terminal level of bleeder circuit 104 becomes logic from logic high
Low level.
Further, based on above-described embodiment, as shown in figure 5, the self-locking power supply that the utility model embodiment provides is opened
It closes in device, bleeder circuit 104 includes R1, R2 and filter capacitor C1.
Wherein, one end of C1 is connect with the tie point of R1 and R2；Another termination GND of C1.
Input terminal of the one end of R1 as bleeder circuit 104, the other end of R1 and one end of R2 connect, another termination of R2
GND。
Voltage output end of the tie point as bleeder circuit 104 between R1 and R2.
R2 and C1 forms RC circuits, for eliminating shake and the burr when self-resetting type switch 101 is pressed.
Further, based on above-described embodiment, as shown in fig. 6, the self-locking power supply that the utility model embodiment provides is opened
It closes in device, self-locking switch circuit 105 includes：First switch device Q1, third divider resistance R3, the 4th divider resistance R4 and
Two switching device Q2.
Wherein, control terminal of the first control terminal of Q1 as self-locking switch circuit 105, it is defeated with self-locking control circuit 106
Outlet connects.
The second control termination GND of Q1.
The output terminal of Q1 and one end of R4 connect.
The other end of R4 and one end of the first control terminal of Q2 and R3 connect.
Input terminal of the second control terminal of Q2 as self-locking switch circuit 105, with the output terminal of power-supply device 101 and R3
The other end connects.
Output terminal of the output terminal of Q2 as self-locking switch circuit 105.
When switching enable signal as logic high, Q1 and Q2 are both turned on；
When switching enable signal as logic low, Q1 and Q2 are turned off.
In the utility model embodiment, the switch enable signal that self-locking control circuit 106 exports controls Q1 on and off；
When switching enable signal as logic high, Q1 conductings；Input voltage, the output voltage of Q1 provided by power-supply device 101,
And the partial pressure of R3 and R4 so that Q2 is connected, i.e., self-locking switch circuit 105 is connected.When switching enable signal as logic low,
Q1 is closed, and Q2 is closed, i.e., self-locking switch circuit 105 is closed.
Further, in the self-locking power switch device provided based on above-described embodiment, the utility model embodiment, from
Q1 in lock-switch circuit 105 is NMOS transistor or negative-positive-negative transistor.
If Q1 is NMOS transistor, the first control terminal of Q1 is specially the grid of NMOS transistor；The second control of Q1
End is specially the source electrode of NMOS transistor；The output terminal of Q1 is specially the drain electrode of NMOS transistor.
If Q1 is negative-positive-negative transistor, the first control terminal of Q1 is specially the base stage of negative-positive-negative transistor；Q1
The second control terminal be specially negative-positive-negative transistor emitter；The output terminal of Q1 is specially the collection of negative-positive-negative transistor
Electrode.
Correspondingly, Q2 is PMOS transistor or positive-negative-positive transistor.
If Q2 is PMOS transistor, the first control terminal of Q2 is specially the grid of PMOS transistor；The second control of Q2
End is specially the source electrode of PMOS transistor；The output terminal of Q2 is specially the drain electrode of PMOS transistor.
If Q2 is positive-negative-positive transistor, the first control terminal of Q2 is specially the base stage of positive-negative-positive transistor；Q2
The second control terminal be specially positive-negative-positive transistor emitter；The output terminal of Q2 is specially the collection of positive-negative-positive transistor
Electrode.
In the utility model embodiment, when the switch enable signal that self-locking control circuit 106 exports is logic high,
NMOS transistor or negative-positive-negative transistor conducting；Input voltage, the output voltage of Q1 provided by power-supply device 101, with
And the partial pressure of R3 and R4, the first control terminal voltage of Q2 (PMOS transistor or positive-negative-positive transistor) are less than the second control terminal
Voltage, and the voltage difference between the second control terminal and the first control terminal is more than the turn-on threshold voltage of Q2, Q2 conductings.It is in this way, electric
Source device 101 can be supplied by the PMOS transistor or positive-negative-positive transistor of conducting for equipment to be powered and self-locking control circuit
Electricity.
Further, based on above-described embodiment, as shown in fig. 7, the self-locking power supply that the utility model embodiment provides is opened
It closes in device, self-locking control circuit 106 includes：D type flip flop D1 and phase inverter D2.
Wherein, signal detection end of the Clock control end of d type flip flop as self-locking control circuit, the output with bleeder circuit
End connection；The Q output of d type flip flop and the input terminal of phase inverter connect；The output terminal of phase inverter and the D input terminals of d type flip flop
Connection, and as the enabled output terminal of self-locking control circuit, connect with the control terminal of self-locking switch circuit；The VCC of d type flip flop is defeated
Enter energization input of the end as self-locking control circuit.
It will be described in detail so that the Q1 in self-locking switch circuit 105 is NMOS transistor, Q2 is PMOS transistor as an example below
The circuit structure and its operation principle of self-locking power switch device provided by the utility model.
As shown in figure 8, self-locking power switch device includes：Power-supply device, self-resetting type switch S1, isolating diode Q3,
DC-DC converter, the first divider resistance R1, the second divider resistance R2, filter capacitor C1, NMOS transistor Q1, third partial pressure electricity
Hinder R3, the 4th divider resistance R4, PMOS transistor Q2, d type flip flop D1 and phase inverter D2.
Wherein, one end connection of the first end of the output terminal of power-supply device and S1, the source electrode of Q2 and R3.
The second end of S1 and one end of the anode of Q3 and R1 connect.
The drain electrode of Q2 is connect with the input terminal of the cathode of Q3 and DC-DC converter.The grid of Q2 and the other end of R3, R4
One end connects.
The drain electrode of the other end and Q1 of R4 connects.
The source electrode of Q1 meets GND；A termination GND of R2；A termination GND of C1.
The grid of Q1 is connect with the D input terminals of d type flip flop D1 and the output terminal of phase inverter D2；The input terminal of phase inverter D2 with
The Q output connection of d type flip flop D1.
The clock end CLK connections of the other end of R2 and the other end of R1, the other end of C1 and d type flip flop D1.
The output terminal of DC-DC converter opens the light the power supply output terminal of device as self-locking power supply, with d type flip flop D1's
VCC input terminals are connected with equipment to be powered.
In the utility model embodiment, by the tie point to drain with the cathode of Q3 and the input terminal of DC-DC converter of Q2,
It is denoted as VBUS；By the tie point of the drain electrode of R4 and Q1, it is denoted as V1；By the grid of Q2 and the tie point of R3, R4, it is denoted as V2；By R2
With the tie point of R1, it is denoted as V3；The signal that the CLK ends of d type flip flop D1 are detected, is denoted as Button signals；By phase inverter D2's
The switch enable signal of output terminal output, is denoted as PWE-EN signals.
Based on foregoing circuit structure, the operation principle of self-locking power switch device is as follows：
Push button S1, S1 is closed, and input power Vin reaches VBUS through S1, Q3, electricity output in DC-DC converter.Vin
Power supply makes Button signals generate the rising variation of " 0 " to " 1 ", Button meets D1 through divider resistance R1, R2 and filter capacitor C1
Clock end CLK.The D ends of d type flip flop are " 0 " before powering on, and " 0 " is exported under the triggering of CLK ends rising edge, and inverted device output is high
Level " 1 " gives PWR_EN ends, and PWR_EN=" 1 ", Q1 conducting, V1 point voltages are close to 0V, and V2 point voltages are through R3, R4 intrinsic standoff ratio Vin
The low V of voltageGS(being more than Q2 conducting gate source voltages maximum value), Q2 conductings, input power is powered through Q2 to equipment to be powered.
After unclamping button S1 switch, Button powerdown signals are pulled low as " 0 ", and d type flip flop CLK ends do not have the rising edge defeated
Enter, export constant holding " 1 ", Q1 is connected, Q2 then is connected, keeps device power state to be powered.
Powered-down process：S1 is closed after pushing button S1, and Vin power supplys are through divider resistance R1, R2 and filter capacitor C1, Button
Signal generates the rising variation of " 0 " to " 1 ", and the D ends of d type flip flop are " 1 " at this time, and D1 exports " 1 ", and inverted device output " 0 " is given
PWR_EN ends.PWR_EN=" 0 ", Q1 are turned off, V1, V2 point voltage approximation input voltage vin, and Q2 is disconnected, device powers down to be powered.
In the specification of the utility model, the self-locking of switch is realized using self-resetting type switch and self-locking switch circuit.Pass through D
Trigger and phase inverter realize the overturning of control signal PWR_EN：Equipment to be powered, which does not power on, presses S1 generation PWR_EN=" 1 ",
Control Q2 that device power to be powered is connected；S1 is pressed after device power to be powered and generates PWR_EN=" 0 ", control Q2, which is disconnected, to be waited to supply
It is electric under electric equipment.Shake and burr when the RC circuits of R2 and C1 compositions are used for eliminating by key pressing.Power supply can be realized during power-off
Being fully disconnected between equipment to be powered reduces power supply power consumption.
In the specification of the utility model, numerous specific details are set forth.It is to be appreciated, however, that the reality of the utility model
Applying example can put into practice without these specific details.In some instances, well known method, knot is not been shown in detail
Structure and technology, so as not to obscure the understanding of this description.
Finally it should be noted that：Above example is only to illustrate the technical solution of the utility model, rather than its limitations；
Although the utility model is described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that：
It still can modify to the technical solution recorded in foregoing embodiments or which part technical characteristic is carried out etc.
With replacement；And these modifications or replacement, various embodiments of the utility model technology that it does not separate the essence of the corresponding technical solution
The spirit and scope of scheme.
Claims (10)
1. a kind of self-locking power switch device, which is characterized in that including：Power-supply device, self-resetting type switch, isolating diode,
Bleeder circuit, self-locking switch circuit and self-locking control circuit；Wherein,
The output terminal of the power-supply device is connect with the first end that the self-resetting type switchs；
The second end of the self-resetting type switch is connect with the anode of the isolating diode；The cathode of the isolating diode and institute
State the energization input connection of self-locking control circuit；The second end and the input terminal of the bleeder circuit of the self-resetting type switch connect
It connects；The output terminal of the bleeder circuit is connect with the signal detection end of the self-locking control circuit；
The enabled output terminal of the self-locking control circuit is connect with the control terminal of the self-locking switch circuit；
The input terminal of the self-locking switch circuit is connect with the output terminal of the power-supply device；
The output terminal of the self-locking switch circuit and the power supply of the cathode and the self-locking control circuit of the isolating diode are defeated
Enter end connection；
Wherein, the cathode of the output terminal of the self-locking switch circuit and the isolating diode, as the self-locking power supply
The power supply output terminal of switching device, for providing power supply for equipment to be powered；
The self-locking control circuit is exported and the level change state at the signal detection end and described is made to self-locking switch circuit
The current corresponding switch enable signal of level state of energy output terminal, to control the on and off of the self-locking switch circuit.
2. self-locking power switch device according to claim 1, which is characterized in that further include：DC power convertor；
The input terminal of the DC power convertor and the output terminal of the self-locking switch circuit and the moon of the isolating diode
Pole connects；
Power supply output terminal of the output terminal of the DC power convertor as the self-locking power switch device.
3. self-locking power switch device according to claim 1, which is characterized in that
The bleeder circuit includes the first divider resistance and the second divider resistance；
Input terminal of the one end of first divider resistance as the bleeder circuit, the other end of first divider resistance with
One end connection of second divider resistance, the other end ground connection GND of second divider resistance；
Voltage output of the tie point as the bleeder circuit between first divider resistance and second divider resistance
End.
4. self-locking power switch device according to claim 3, which is characterized in that
The bleeder circuit further includes：Filter capacitor；
One end of the filter capacitor is connect with the tie point of first divider resistance and second divider resistance；
Another termination GND of the filter capacitor.
5. self-locking power switch device according to claim 1, which is characterized in that
The self-locking switch circuit includes：First switch device, third divider resistance, the 4th divider resistance and second switch device
Part；
Wherein, control terminal of the first control terminal of the first switch device as the self-locking switch circuit, with the self-locking
The enabled output terminal connection of control circuit；
Second control termination GND of the first switch device；
The output terminal of the first switch device is connect with one end of the 4th divider resistance；
The other end of 4th divider resistance and the first control terminal of the second switch device and the third divider resistance
One end connection；
Input terminal of second control terminal of the second switch device as the self-locking switch circuit, with the power-supply device
Output terminal is connected with the other end of the third divider resistance；
Output terminal of the output terminal of the second switch device as the self-locking switch circuit；
When the switch enable signal is logic high, the first switch device and the second switch device are both turned on；
When the switch enable signal is logic low, the first switch device and the second switch device are turned off.
6. self-locking power switch device according to claim 5, which is characterized in that the first switch device is NMOS
Transistor；
First control terminal of the first switch device is specially the grid of the NMOS transistor；The first switch device
Second control terminal is specially the source electrode of the NMOS transistor；The output terminal of the first switch device is specially the NMOS brilliant
The drain electrode of body pipe.
7. self-locking power switch device according to claim 5, which is characterized in that the second switch device is PMOS
Transistor；
First control terminal of the second switch device is specially the grid of the PMOS transistor；The second switch device
Second control terminal is specially the source electrode of the PMOS transistor；The output terminal of the second switch device is specially the PMOS brilliant
The drain electrode of body pipe.
8. self-locking power switch device according to claim 5, which is characterized in that the first switch device is NPN
Type transistor；
First control terminal of the first switch device is specially the base stage of the negative-positive-negative transistor；The first switch
Second control terminal of device is specially the emitter of the negative-positive-negative transistor；The output terminal tool of the first switch device
Body is the collector of the negative-positive-negative transistor.
9. self-locking power switch device according to claim 5, which is characterized in that the second switch device is PNP
Type transistor；
First control terminal of the second switch device is specially the base stage of the positive-negative-positive transistor；The second switch
Second control terminal of device is specially the emitter of the positive-negative-positive transistor；The output terminal tool of the second switch device
Body is the collector of the positive-negative-positive transistor.
10. according to any self-locking power switch devices of claim 1-9, which is characterized in that described from lock control electricity
Road includes：D type flip flop and phase inverter；Wherein,
Signal detection end of the Clock control end of the d type flip flop as the self-locking control circuit, with the bleeder circuit
Output terminal connects；
The Q output of the d type flip flop is connect with the input terminal of the phase inverter；
The output terminal of the phase inverter is connect with the D input terminals of the d type flip flop, and as the enabled of the self-locking control circuit
Output terminal is connect with the control terminal of the self-locking switch circuit；
Energization input of the VCC input terminals of the d type flip flop as the self-locking control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721880496.1U CN207588827U (en) | 2017-12-28 | 2017-12-28 | A kind of self-locking power switch device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721880496.1U CN207588827U (en) | 2017-12-28 | 2017-12-28 | A kind of self-locking power switch device |
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| Publication Number | Publication Date |
|---|---|
| CN207588827U true CN207588827U (en) | 2018-07-06 |
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ID=62740650
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| CN201721880496.1U Active CN207588827U (en) | 2017-12-28 | 2017-12-28 | A kind of self-locking power switch device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108919728A (en) * | 2018-08-23 | 2018-11-30 | 深圳和而泰智能控制股份有限公司 | A kind of control circuit |
| WO2024108794A1 (en) * | 2022-11-22 | 2024-05-30 | 广州视源电子科技股份有限公司 | Wide input voltage circuit, circuit board, and electronic device |
-
2017
- 2017-12-28 CN CN201721880496.1U patent/CN207588827U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108919728A (en) * | 2018-08-23 | 2018-11-30 | 深圳和而泰智能控制股份有限公司 | A kind of control circuit |
| CN108919728B (en) * | 2018-08-23 | 2023-09-26 | 深圳和而泰智能控制股份有限公司 | Control circuit |
| WO2024108794A1 (en) * | 2022-11-22 | 2024-05-30 | 广州视源电子科技股份有限公司 | Wide input voltage circuit, circuit board, and electronic device |
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