CN219145365U - Startup and shutdown control circuit and electronic equipment - Google Patents
Startup and shutdown control circuit and electronic equipment Download PDFInfo
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- CN219145365U CN219145365U CN202320038066.4U CN202320038066U CN219145365U CN 219145365 U CN219145365 U CN 219145365U CN 202320038066 U CN202320038066 U CN 202320038066U CN 219145365 U CN219145365 U CN 219145365U
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Abstract
The application discloses switch control circuit and electronic equipment, it includes: the control unit is used for outputting a startup signal or a shutdown signal; the input end of the switching circuit is used for being connected with a power supply, and the output end of the switching circuit is connected with the control unit; the auxiliary starting circuit is connected to the controlled end of the switching circuit and used for controlling the switching circuit to be turned on or turned off; the touch switch K1 is connected between the power supply and the auxiliary starting circuit; a holding circuit connected between the control unit and the auxiliary starting circuit, the holding circuit being configured to: the auxiliary starting circuit is used for outputting a holding signal to the auxiliary starting circuit according to the starting signal so as to control the switching circuit to be turned on, and outputting a disconnecting signal to the auxiliary starting circuit according to the shutdown signal so as to control the switching circuit to be turned off. The circuit has the characteristics of simple circuit structure, circuit cost saving, high response speed, high operation reliability and the like.
Description
Technical Field
The application relates to the technical field of electronic circuits, in particular to a startup and shutdown control circuit and electronic equipment.
Background
In the existing key control circuit, two independent chips of a switch control circuit and an enabling compensation circuit are needed to realize the joint locking function, and the circuit architecture is high in cost, insufficient in response speed and incapable of meeting the application requirements of low cost and high reliability.
Disclosure of Invention
The technical problem to be solved by the application is to provide the on-off control circuit and the electronic equipment which are simple in circuit structure, high in response speed and high in operation reliability, and the circuit cost is saved aiming at the defects of the prior art.
In order to solve the technical problems, the following technical scheme is adopted.
In a first aspect, there is provided a power on/off control circuit, comprising: the control unit is used for outputting a starting signal or a shutdown signal; the input end of the switching circuit is used for being connected with a power supply, and the output end of the switching circuit is connected with the control unit; the auxiliary starting circuit is connected to the controlled end of the switching circuit and used for controlling the switching circuit to be turned on or turned off; a tact switch K1, wherein the tact switch K1 is connected between the power supply and the auxiliary starting circuit; a holding circuit connected between the control unit and the auxiliary starting circuit, the holding circuit being configured to: and outputting a holding signal to the auxiliary starting circuit according to the starting signal so as to control the switching circuit to be turned on, and outputting a disconnecting signal to the auxiliary starting circuit according to the shutting signal so as to control the switching circuit to be turned off.
Preferably, the auxiliary starting circuit comprises an NPN tube Q1, the switching circuit comprises a MOS tube Q2, a base electrode of the NPN tube Q1 is connected to the tact switch K1, an emitter electrode of the NPN tube Q1 is grounded, a collector electrode of the NPN tube Q1 is connected to a gate electrode of the MOS tube Q2, a source electrode of the MOS tube Q2 is connected to a power supply, and a drain electrode of the MOS tube Q2 is connected to the control unit.
Preferably, the auxiliary starting circuit includes a resistor R3, and the resistor R3 is connected between the base of the NPN tube Q1 and the tact switch K1.
Preferably, the switch circuit includes a resistor R4 and a resistor R5, a first end of the resistor R4 is connected with the source electrode of the MOS transistor Q2, a second end of the resistor R4 is connected with the gate electrode of the MOS transistor Q2, and the resistor R5 is connected between the collector electrode of the NPN transistor Q1 and the gate electrode of the MOS transistor Q2.
Preferably, the holding circuit includes a diode D2, an anode of the diode D2 is connected to the control unit, and a cathode of the diode D2 is connected to the base of the NPN tube Q1 through the resistor R3.
Preferably, the control unit includes a DC/DC unit and an MCU device U1, wherein an output end of the MCU device U1 is connected to the holding circuit, and the DC/DC unit is connected between an output end of the switching circuit and an input end of the MCU device U1.
Preferably, the on-off control circuit further includes a detection circuit, the detection circuit is connected between the tact switch K1 and the control unit, and the detection circuit is used for detecting a closing state signal of the tact switch K1 and feeding back the closing state signal to the control unit.
Preferably, the detection circuit includes a resistor R1 and a resistor R2, the resistor R1 and the resistor R2 are sequentially connected and then connected between the tact switch K1 and the ground, and a connection point of the resistor R1 and the resistor R2 is connected to the control unit.
In a second aspect, an electronic device is provided, which includes a power supply and the on-off control circuit, where an input end of the on-off control circuit is connected to the power supply.
Preferably, the power supply includes a battery pack and a BMS board connected between the battery pack and an input terminal of the switching circuit.
The on-off control circuit and the electronic equipment provided by the embodiment of the application have the following beneficial effects:
the control unit in the switching on/off control circuit is used for outputting a starting signal or a shutdown signal, the input end of the switching circuit is used for being connected with a power supply, the output end of the switching circuit is connected with the control unit, and the auxiliary starting circuit is connected with the controlled end of the switching circuit and used for controlling the switching circuit to be turned on or off. The touch switch is connected between the power supply and the auxiliary starting circuit, the switching circuit and the auxiliary starting circuit are in a closed state in an initial state, the control unit is in a power-down state, and when a user presses the touch switch, the auxiliary starting circuit controls the switching circuit to be conducted and enables the control unit to be electrified, and the starting step is completed.
The holding circuit in the on-off control circuit is connected between the control unit and the auxiliary starting circuit, and is used for outputting a holding signal to the auxiliary starting circuit according to a starting signal so as to control the switching circuit to be turned on and outputting a disconnection signal to the auxiliary starting circuit according to a shutdown signal so as to control the switching circuit to be turned off; after the control unit is electrified, the control unit can send a starting signal to the holding circuit, the holding circuit outputs the holding signal according to the starting signal, the auxiliary starting circuit continuously controls the switching circuit to be conducted according to the holding signal, and the circuit enters a continuous power supply state; when the control unit sends a shutdown signal to the holding circuit, the holding circuit outputs a disconnection signal to the auxiliary starting circuit according to the shutdown signal, and then the switching circuit is controlled to be disconnected. Compared with the prior art adopting a double-chip combined locking mode, the circuit has the advantages that the circuit structure is simple, the circuit cost can be obviously saved, the circuit response speed is high, and the operation reliability is high.
Drawings
FIG. 1 is a schematic block diagram of a power on/off control circuit in an embodiment of the present application;
FIG. 2 is a schematic circuit diagram of the power on/off control circuit in the preferred embodiment;
FIG. 3 is a schematic circuit diagram of the operation mode 1 in the preferred embodiment;
FIG. 4 is a schematic circuit diagram of operation 2 in the preferred embodiment;
FIG. 5 is a schematic circuit diagram of operation 3 in the preferred embodiment;
FIG. 6 is a schematic circuit diagram of operation 4 in the preferred embodiment;
FIG. 7 is a schematic circuit diagram of operation 5 in a preferred embodiment;
fig. 8 is a schematic circuit diagram of the operation mode 6 in the preferred embodiment.
Detailed Description
The present application is described in more detail below with reference to the accompanying drawings and examples.
The embodiment of the application discloses a startup and shutdown control circuit, please refer to fig. 1, which includes a control unit 1, a switching circuit 2, an auxiliary starting circuit 3, a tact switch K1 and a holding circuit 4, wherein: the control unit 1 is used for outputting a startup signal or a shutdown signal; the input end of the switch circuit 2 is used for being connected with a power supply 5, and the output end of the switch circuit 2 is connected with the control unit 1; the auxiliary starting circuit 3 is connected to the controlled end of the switch circuit 2 and is used for controlling the switch circuit 2 to be turned on or turned off; the tact switch K1 is connected between the power supply 5 and the auxiliary starting circuit 3; the holding circuit 4 is connected between the control unit 1 and the auxiliary starting circuit 3, and the holding circuit 4 is used for outputting a holding signal to the auxiliary starting circuit 3 according to a starting signal to control the switch circuit 2 to be turned on, and is used for outputting a disconnection signal to the auxiliary starting circuit 3 according to a shutdown signal to control the switch circuit 2 to be turned off.
In this embodiment of the present application, the control unit 1 in the on-off control circuit is configured to output an on-off signal or an off-off signal, the input end of the switch circuit 2 is configured to be connected to the power supply 5, the output end of the switch circuit 2 is connected to the control unit 1, and the auxiliary starting circuit 3 is connected to the controlled end of the switch circuit 2 and is configured to control the on-off state of the switch circuit 2. The touch switch K1 is connected between the power supply 5 and the auxiliary starting circuit 3, the switching circuit 2 and the auxiliary starting circuit 3 are in a closed state in an initial state, the control unit 1 is in a power-down state, when a user presses the touch switch K1, the auxiliary starting circuit 3 controls the switching circuit 2 to be conducted and enables the control unit 1 to be electrified, and the starting step is completed.
The holding circuit 4 in the on-off control circuit is connected between the control unit 1 and the auxiliary starting circuit 3, the holding circuit 4 is used for outputting a holding signal to the auxiliary starting circuit 3 according to a starting signal so as to control the switching circuit 2 to be turned on, and is used for outputting a disconnection signal to the auxiliary starting circuit 3 according to a shutdown signal so as to control the switching circuit 2 to be turned off; after the control unit 1 is powered on, the control unit 1 can send a power-on signal to the holding circuit 4, the holding circuit 4 outputs the holding signal according to the power-on signal, the auxiliary starting circuit 3 enables the switch circuit 2 to be continuously conducted according to the holding signal, the circuit enters a continuous power supply state, and when the control unit 1 sends a power-off signal to the holding circuit 4, the holding circuit 4 outputs a disconnection signal to the auxiliary starting circuit 3 according to the power-off signal, and then the switch circuit 2 is controlled to be disconnected. Compared with the prior art adopting a double-chip combined locking mode, the circuit has the advantages that the circuit structure is simple, the circuit cost can be obviously saved, the circuit response speed is high, and the operation reliability is high.
In some embodiments of the present application, please refer to fig. 2, the auxiliary starting circuit 3 includes an NPN tube Q1, the switching circuit 2 includes a MOS tube Q2, a base electrode of the NPN tube Q1 is connected to the tact switch K1, an emitter electrode of the NPN tube Q1 is grounded, a collector electrode of the NPN tube Q1 is connected to a gate electrode of the MOS tube Q2, a source electrode of the MOS tube Q2 is connected to the power supply 5, and a drain electrode of the MOS tube Q2 is connected to the control unit 1. In practical application, when the tact switch K1 is pressed, the NPN transistor Q1 is turned on, the voltage of the gate of the MOS transistor Q2 is reduced, and the MOS transistor Q2 is turned on, so that the control unit 1 is powered on to operate.
Further, the auxiliary starting circuit 3 includes a resistor R3, and the resistor R3 is connected between the base of the NPN tube Q1 and the tact switch K1. The resistor R3 is a current limiting resistor, and is used for protecting the NPN transistor Q1, specifically, because the triode belongs to a current control element, when the triode belongs to an amplifying or saturation state, if the triode is not connected with the current limiting resistor, once the input voltage is larger, the current of the base electrode of the triode will be obviously increased, and the triode is easy to burn.
In some embodiments of the present application, the switch circuit 2 includes a resistor R4 and a resistor R5, a first end of the resistor R4 is connected with a source electrode of the MOS transistor Q2, a second end of the resistor R4 is connected with a gate electrode of the MOS transistor Q2, and the resistor R5 is connected between a collector electrode of the NPN transistor Q1 and the gate electrode of the MOS transistor Q2. According to the embodiment of the application, the resistor R4 and the resistor R5 are arranged, so that the UG voltage of the MOS tube Q2 is smaller than the US voltage, and the MOS tube Q2 is conducted.
In some embodiments of the present application, the holding circuit 4 includes a diode D2, an anode of the diode D2 is connected to the control unit 1, and a cathode of the diode D2 is connected to a base of the NPN tube Q1 through a resistor R3. The diode D2 is used to avoid the control unit 1 from being damaged by the instant of power-on of the press tact switch K1.
In some embodiments of the present application, the control unit 1 includes a DC/DC unit 10 and an MCU device U1, where an output terminal of the MCU device U1 is connected to the holding circuit 4, and the DC/DC unit 10 is connected between an output terminal of the switching circuit 2 and an input terminal of the MCU device U1.
In some embodiments of the present application, the on-off control circuit further includes a detection circuit 6, the detection circuit 6 is connected between the tact switch K1 and the control unit 1, and the detection circuit 6 is configured to detect a closing state signal of the tact switch K1 and feed back the closing state signal to the control unit 1.
Specifically, the detection circuit 6 includes a resistor R1 and a resistor R2, the resistor R1 and the resistor R2 are sequentially connected and then connected between the tact switch K1 and the ground, and a connection point of the resistor R1 and the resistor R2 is connected to the control unit 1. The resistor R1 and the resistor R2 are both voltage dividing resistors, and the control unit 1 can detect the closed state of the tact switch K1 by detecting the voltage of the resistor R2.
In the embodiment of the application, the working state of the on-off control circuit is as follows:
in the working state 1, referring to fig. 3, the tact switch K1 is pressed, the power supply forms a starting power supply loop through the tact switch K1, the resistor R1, the diode D1, the resistor R3 and the NPN tube Q1, the NPN tube Q1 is started to be conducted, the gate voltage of the MOS tube Q2 is reduced, the MOS tube Q2 is conducted, the power supply voltage is added to the DC/DC unit to supply power to the MCU device U1, and the MCU device U1 is powered on to work;
in the working state 2, referring to fig. 4, the auxiliary power supply enters the working state, the MCU device U1 is powered on to start normal operation, after the tact switch K1 is pressed down, the power supply forms a loop with the ground through the tact switch K1, the resistor R1 and the resistor R2, the voltage signal of the resistor R2 enters the mcu_ad, the MCU device U1 detects the power supply voltage, and the key instruction is processed according to the program;
in the working state 3, referring to fig. 5, the MCU device U1 detects the input voltage, if the voltage requirement is met, the MCU device U1 is powered on, and outputs a high-level signal, and maintains the conduction of the NPN tube Q1 through the diode D2 and the resistor R3, so as to complete the power-on and power-on process of the whole machine;
in the working state 4, please refer to fig. 6, after the power-on and power-on process is completed, the tact switch K1 is reset, the MCU device U1 outputs a high-level signal, and the NPN tube Q1 is maintained to be turned on through the diode D2 and the resistor R3, so as to maintain the continuous power supply of the auxiliary power supply.
In the working state 5, please refer to fig. 7, after the power-on startup procedure is completed, the MCU device U1 outputs a high-level signal, and maintains the conduction of the NPN tube Q1 through the diode D2 and the resistor R3, so as to keep the auxiliary power supply continuously supplying power. After the tact switch K1 is pressed again, the signal reaches the detection port of the MCU device U1 through the tact switch K1, the resistor R1 and the resistor R2, the MCU device U1 can detect the time of pressing the key, and then the key signal is processed according to MCU program processing, and the method comprises the following steps: long press power down, short press enter highlighting mode, etc.
In the working state 6, referring to fig. 8, when the power-off is needed, the enabling end mcu_en is enabled to output a low level, the power-off is performed through the diode D2, the resistor R3 and the NPN tube Q1, the gate of the MOS tube Q2 is at a high level, the MOS tube Q2 is also turned off, the power supply of the auxiliary power supply DC/DC is turned off at this time, the MCU device U1 is powered down, and the power-off and power-off actions of the whole machine are completed.
In summary, the on-off control circuit provided by the embodiment of the application is simple in circuit structure, can obviously save circuit cost, is relatively fast in circuit response speed, and has relatively high operation reliability. In addition, the on-off control circuit provided by the embodiment of the application is suitable for being applied to portable energy storage equipment, and can simultaneously give consideration to voltage detection, starting and closing functions, and can also perform short-time key and long-time key detection and identification, so that the control unit is beneficial to realizing different control functions, and the application requirements are well met.
On the basis, the embodiment of the application also provides electronic equipment, which comprises a power supply 5 and the switching-on/off control circuit, wherein the input end of the switching circuit 2 of the switching-on/off control circuit is connected with the power supply 5. The electronic equipment has the on-off control circuit and has the same beneficial effects, and the on-off control circuit is not repeated here.
Further, the power supply 5 includes a battery pack and a BMS board connected between the battery pack and an input terminal of the switching circuit 2. The electronic device may be a portable energy storage device, and the current of the battery pack is connected to the input end of the switch circuit 2 through the BMS board, so as to realize control over the output of the battery pack through the on-off control circuit.
The foregoing description of the preferred embodiments of the present application is not intended to limit the utility model, but is intended to cover modifications, equivalents, or improvements within the scope of the present application.
Claims (10)
1. A power on/off control circuit, characterized by comprising:
the control unit (1) is used for outputting a starting signal or a shutdown signal;
the input end of the switch circuit (2) is used for being connected with a power supply (5), and the output end of the switch circuit (2) is connected with the control unit (1);
the auxiliary starting circuit (3) is connected to the controlled end of the switch circuit (2) and used for controlling the switch circuit (2) to be turned on or turned off;
a tact switch K1, the tact switch K1 being connected between the power supply (5) and the auxiliary starting circuit (3);
-a holding circuit (4), said holding circuit (4) being connected between said control unit (1) and said auxiliary starting circuit (3), said holding circuit (4) being adapted to:
outputting a hold signal to the auxiliary starting circuit (3) according to the start-up signal to control the switch circuit (2) to be turned on, and
and outputting a disconnection signal to the auxiliary starting circuit (3) according to the shutdown signal so as to control the switch circuit (2) to be disconnected.
2. The power on/off control circuit according to claim 1, wherein the auxiliary starting circuit (3) comprises an NPN tube Q1, the switching circuit (2) comprises a MOS tube Q2, a base electrode of the NPN tube Q1 is connected to the tact switch K1, an emitter electrode of the NPN tube Q1 is grounded, a collector electrode of the NPN tube Q1 is connected to a gate electrode of the MOS tube Q2, a source electrode of the MOS tube Q2 is connected to a power supply (5), and a drain electrode of the MOS tube Q2 is connected to the control unit (1).
3. The power on/off control circuit according to claim 2, wherein the auxiliary starting circuit (3) comprises a resistor R3, the resistor R3 being connected between the base of the NPN transistor Q1 and the tact switch K1.
4. The power on/off control circuit according to claim 2, wherein the switching circuit (2) comprises a resistor R4 and a resistor R5, a first end of the resistor R4 is connected to the source of the MOS transistor Q2, a second end of the resistor R4 is connected to the gate of the MOS transistor Q2, and the resistor R5 is connected between the collector of the NPN transistor Q1 and the gate of the MOS transistor Q2.
5. The on-off control circuit according to claim 2, characterized in that the holding circuit (4) comprises a diode D2, an anode of the diode D2 being connected to the control unit (1), and a cathode of the diode D2 being connected to the base of the NPN tube Q1.
6. The on-off control circuit according to claim 1, characterized in that the control unit (1) comprises a DC/DC unit (10) and an MCU device U1, the output of the MCU device U1 being connected to the holding circuit (4), the DC/DC unit (10) being connected between the output of the switching circuit (2) and the input of the MCU device U1.
7. The on-off control circuit according to claim 1, further comprising a detection circuit (6), wherein the detection circuit (6) is connected between the tact switch K1 and the control unit (1), and the detection circuit (6) is configured to detect a closing state signal of the tact switch K1 and feed back to the control unit (1).
8. The power on/off control circuit according to claim 7, wherein the detection circuit (6) includes a resistor R1 and a resistor R2, the resistor R1 and the resistor R2 are sequentially connected and then connected between the tact switch K1 and the ground, and a connection point of the resistor R1 and the resistor R2 is connected to the control unit (1).
9. An electronic device comprising a power supply (5) and a switching control circuit as claimed in any one of claims 1 to 8, the input of the switching circuit (2) of the switching control circuit being connected to the power supply (5).
10. The electronic device according to claim 9, characterized in that the power supply (5) comprises a battery pack and a BMS board connected between the battery pack and the input of the switching circuit (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320038066.4U CN219145365U (en) | 2023-01-06 | 2023-01-06 | Startup and shutdown control circuit and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320038066.4U CN219145365U (en) | 2023-01-06 | 2023-01-06 | Startup and shutdown control circuit and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219145365U true CN219145365U (en) | 2023-06-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320038066.4U Active CN219145365U (en) | 2023-01-06 | 2023-01-06 | Startup and shutdown control circuit and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219145365U (en) |
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2023
- 2023-01-06 CN CN202320038066.4U patent/CN219145365U/en active Active
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