CN218352487U - Low-power-consumption switching-on and switching-off circuit - Google Patents
Low-power-consumption switching-on and switching-off circuit Download PDFInfo
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- CN218352487U CN218352487U CN202222792451.6U CN202222792451U CN218352487U CN 218352487 U CN218352487 U CN 218352487U CN 202222792451 U CN202222792451 U CN 202222792451U CN 218352487 U CN218352487 U CN 218352487U
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Abstract
The utility model belongs to the technical field of on-off control's technique and specifically relates to a low-POWER consumption switch-on/off circuit is related to, it includes the POWER button module, first triode Q1, second triode Q2, a control module includes enable end POWER _ EN, POWER button module connects in first triode Q1's collecting electrode in order to export corresponding switching on/off trigger signal, first triode Q1's projecting pole ground connection, control module's enable end POWER _ EN is connected in control module's enable end POWER _ EN to the base of first triode Q1, control module's enable end POWER _ EN is used for exporting enable signal, the node between first triode Q1 and POWER button module is connected to second triode Q2's base, second triode Q2's projecting pole is connected in the battery, second triode Q2's collecting electrode is connected in subsequent POWER chip. The power consumption reduction method and the power consumption reduction device have the effect of reducing the power consumption of the circuit after shutdown.
Description
Technical Field
The application relates to the technical field of switch control, in particular to a low-power-consumption switch circuit.
Background
At present, many electronic devices use a one-key power-on and power-off function, and one-key power-on or one-key power-off is realized by means of keys and the like.
The current on-off circuit, the general way is when the user presses the button and shuts down the operation, and each peripheral hardware on the circuit can be closed to inside MCU control chip to enter low-power consumption mode, but under this kind of mode, MCU control chip and each components and parts on every side still are in the circular telegram state in fact, just the peripheral hardware is closed, but MCU control chip and components and parts on every side still have certain consumption to produce to this power consumption who accelerates the battery.
SUMMERY OF THE UTILITY MODEL
In order to reduce the power consumption of the circuit after shutdown, the application provides a low-power-consumption switching-on/off circuit.
The application provides a low-power consumption on-off circuit adopts following technical scheme:
the utility model provides a low-POWER consumption switch circuit, includes POWER button module, first triode Q1, second triode Q2, control module includes enable end POWER _ EN, POWER button module connect in first triode Q1's collecting electrode is with the corresponding switching on and shutting down trigger signal of output, first triode Q1's emitter ground, first triode Q1's base connect in control module's enable end POWER _ EN, control module's enable end POWER _ EN is used for exporting enable signal, second triode Q2's base connect in first triode Q1 with node between the POWER button module, the projecting pole of second triode Q2 is connected in the battery, second triode Q2's collecting electrode is connected in subsequent POWER chip.
Preferably, the first triode Q1 is an NPN-type triode, and the second triode Q2 is a PNP-type triode.
Preferably, the control module includes a detection terminal CHECK _ KEY, and the detection terminal CHECK _ KEY of the control module is connected to the power KEY module to receive the corresponding on/off trigger signal and output the corresponding detection signal.
Preferably, the control module further includes a control terminal PD, and the control terminal PD is configured to output a corresponding control signal to the first triode Q1 according to the detection signal, so as to control on/off of the first triode Q1.
Preferably, the power KEY module is connected with a first diode D1 and a second diode D2, cathodes of the first diode D1 and the second diode D2 are connected to the power KEY module, an anode of the first diode D1 is connected to the detection end CHECK _ KEY of the control module, and an anode of the second diode D2 is connected to a node between the first triode Q1 and the second triode Q2.
Preferably, a first resistor R1 is connected between the base and the emitter of the first triode Q1.
Preferably, a second resistor R2 is connected between the base and the emitter of the second triode Q2.
Preferably, a base of the first triode Q1 is connected to a third resistor R3, and a base of the second triode Q2 is connected to a fourth resistor R4.
To sum up, the application comprises the following beneficial technical effects:
the second triode Q2 is used as a main switch of the circuit, the control module controls the on-off of the first triode Q1 to simultaneously control the on-off of the second triode Q2, so that the on-off of the power supply of the rear-stage circuit is realized, the overall leakage current is about 10uA after the second triode Q2 is closed, and the extremely low standby power consumption is realized.
Drawings
Fig. 1 is an overall circuit connection diagram of an embodiment of the present application.
Detailed Description
The present application is described in further detail below with reference to fig. 1.
The embodiment of the application discloses a low-power-consumption switching-on and switching-off circuit.
As shown in fig. 1, a low power consumption on/off circuit includes a power button module, a first transistor Q1, a second transistor Q2, and a control module.
The control module is current MCU chip, control module includes enabling end POWER _ EN, POWER button module connects in first triode Q1's collecting electrode in order to export corresponding switching on and shutting down trigger signal, first triode Q1's projecting pole ground connection, the enabling end POWER _ EN of control module is connected to first triode Q1's base, control module's enabling end POWER _ EN is used for exporting enable signal, the node between first triode Q1 and POWER button module is connected to second triode Q2's base, the projecting pole of second triode Q2 is connected in the battery, the collecting electrode of second triode Q2 is connected in subsequent POWER chip.
The power supply key module is an instrument key SW, the first triode Q1 is an NPN type triode, and the second triode Q2 is a PNP type triode.
The control module comprises a detection end CHECK _ KEY, and the detection end CHECK _ KEY of the control module is connected to the power supply KEY module to receive a corresponding on-off trigger signal and output a corresponding detection signal. The control module further comprises a control end PD, and the control end PD is used for outputting a corresponding control signal to the first triode Q1 according to the detection signal so as to control the on-off of the first triode Q1.
As shown in fig. 1, a first diode D1 and a second diode D2 are connected to the power KEY module, cathodes of the first diode D1 and the second diode D2 are connected to the power KEY module, an anode of the first diode D1 is connected to the detection terminal CHECK _ KEY of the control module, an anode of the second diode D2 is connected to a node between the first triode Q1 and the second triode Q2, that is, cathodes of the first diode D1 and the second diode D1 are opposite, and a node between the two triodes is connected to the power KEY module.
As shown in fig. 1, when the computer is powered on, after a user presses the meter key SW, a low level is connected to the meter key SW, a collector of a first triode Q1 is pulled down, Q1 is conducted therewith, Q2 is conducted after Q1 is conducted, a battery supplies POWER to a subsequent POWER chip through a second triode Q2 after Q2 is conducted, the whole circuit is powered on, a MCU chip of the control module starts working after Q1 is conducted, and a high level is output to a base of the first triode Q1 through an enable terminal POWER _ EN pin EN of the MCU chip, so that the first triode Q1 is kept conducted, and at this time, even if the meter key SW is released, the enable terminal POWER _ EN of the MCU keeps the first triode Q1 conducted.
When the device is shut down, after a user presses the instrument KEY SW and keeps the instrument KEY SW for a period of time, the detection end CHECK _ KEY of the control module detects that the level of the instrument KEY SW end is changed into a low level which keeps the long time, at the moment, a detection signal is output to the control end PD of the control module, the control end PD pulls the level up after receiving the detection signal, at the moment, after the instrument KEY SW is loosened, the collector of the first triode Q1 is influenced by the control end PD to be put high, the first triode Q1 is disconnected along with the detection signal, the first triode Q1 is disconnected to cause the second triode Q2 to be disconnected, after the second triode Q2 is disconnected, the POWER supply does not supply POWER to the POWER supply chip any more, and simultaneously, because the first triode Q1 is disconnected, the enabling end POWER _ EN of the MCU chip is pulled down, the MCU chip does not output any more, and the shutdown purpose is achieved.
In the embodiment of the application, the second triode Q2 is used as a master switch of the circuit, and the control module controls the on-off of the first triode Q1 to simultaneously control the on-off of the second triode Q2, so that the on-off of the power supply of the rear-stage circuit is realized, and the complete machine leakage current is about 10uA after the second triode Q2 is closed, and the extremely low standby power consumption is realized.
As shown in fig. 1, a first resistor R1 is connected between the base and the emitter of the first triode Q1, and a second resistor R2 is connected between the base and the emitter of the second triode Q2.
The first resistor R1 and the second resistor R2 are used to ensure that the first transistor Q1 and the second transistor Q2 can be reliably turned off when there is no input voltage (or when the input terminal is suspended).
The base of the first triode Q1 is connected with a third resistor R3, and the base of the second triode Q2 is connected with a fourth resistor R4.
The third resistor R3 and the fourth resistor R4 are used for blocking current, so that the base current of the triode works in an allowable range, and the reliable stability of the operation of the triode and the circuit is ensured.
The implementation principle is as follows:
when the computer is started, after a user presses the meter key SW, the low level is accessed to the meter key SW end, the collector electrode of the first triode Q1 is pulled down, Q1 is conducted along with the collector electrode, Q2 is conducted after Q1 is conducted, after Q2 is conducted, the battery supplies POWER to a subsequent POWER chip through the second triode Q2, the whole circuit is started, the MCU chip of the control module starts to work after Q1 is conducted, and the high level is output to the base electrode of the first triode Q1 through the enabling end POWER _ EN pin EN of the MCU chip, so that the first triode Q1 is kept conducted, and at the moment, even if the meter key SW is loosened, the enabling end POWER _ EN of the MCU keeps the first triode Q1 conducted.
When the device is shut down, after a user presses the instrument KEY SW and keeps the instrument KEY SW for a period of time, the detection end CHECK _ KEY of the control module detects that the level of the instrument KEY SW end is changed into a low level which keeps the long time, at the moment, a detection signal is output to the control end PD of the control module, the control end PD pulls the level up after receiving the detection signal, at the moment, after the instrument KEY SW is loosened, the collector of the first triode Q1 is influenced by the control end PD to be put high, the first triode Q1 is disconnected along with the detection signal, the first triode Q1 is disconnected to cause the second triode Q2 to be disconnected, after the second triode Q2 is disconnected, the POWER supply does not supply POWER to the POWER supply chip any more, and simultaneously, because the first triode Q1 is disconnected, the enabling end POWER _ EN of the MCU chip is pulled down, the MCU chip does not output any more, and the shutdown purpose is achieved.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. A low-power-consumption switching circuit, comprising: including POWER button module, first triode (Q1), second triode (Q2), control module includes enabling end POWER _ EN, POWER button module connect in the collecting electrode of first triode (Q1) is with the corresponding switching on and shutting down trigger signal of output, the emitter ground of first triode (Q1), the base of first triode (Q1) connect in control module's enabling end POWER _ EN, control module's enabling end POWER _ EN is used for exporting enable signal, the base of second triode (Q2) connect in first triode (Q1) with node between the POWER button module, the emitting electrode of second triode (Q2) is connected in the battery, the collecting electrode of second triode (Q2) is connected in subsequent POWER chip.
2. The low power consumption switching circuit according to claim 1, wherein: the first triode (Q1) is an NPN type triode, and the second triode (Q2) is a PNP type triode.
3. The low power consumption switching circuit according to claim 1, wherein: the control module comprises a detection end CHECK _ KEY, and the detection end CHECK _ KEY of the control module is connected to the power supply KEY module to receive corresponding on-off trigger signals and output corresponding detection signals.
4. A low power switch circuit according to claim 3, wherein: the control module further comprises a control end PD, and the control end PD is used for outputting a corresponding control signal to the first triode (Q1) according to the detection signal so as to control the on-off of the first triode (Q1).
5. The low power consumption switch circuit according to claim 4, wherein: the power KEY module is connected with a first diode (D1) and a second diode (D2), cathodes of the first diode (D1) and the second diode (D2) are connected to the power KEY module, an anode of the first diode (D1) is connected to a detection end CHECK _ KEY of the control module, and an anode of the second diode (D2) is connected to a node between the first triode (Q1) and the second triode (Q2).
6. The low power consumption switching circuit according to claim 1, wherein: and a first resistor (R1) is connected between the base electrode and the emitting electrode of the first triode (Q1).
7. The low power consumption switch circuit of claim 6, wherein: and a second resistor (R2) is connected between the base electrode and the emitting electrode of the second triode (Q2).
8. The low power consumption switching circuit according to claim 1, wherein: the base electrode of the first triode (Q1) is connected with a third resistor (R3), and the base electrode of the second triode (Q2) is connected with a fourth resistor (R4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222792451.6U CN218352487U (en) | 2022-10-19 | 2022-10-19 | Low-power-consumption switching-on and switching-off circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222792451.6U CN218352487U (en) | 2022-10-19 | 2022-10-19 | Low-power-consumption switching-on and switching-off circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218352487U true CN218352487U (en) | 2023-01-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222792451.6U Active CN218352487U (en) | 2022-10-19 | 2022-10-19 | Low-power-consumption switching-on and switching-off circuit |
Country Status (1)
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|---|---|
| CN (1) | CN218352487U (en) |
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2022
- 2022-10-19 CN CN202222792451.6U patent/CN218352487U/en active Active
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