A power supply control circuit and an optical beauty device

Abstract

The present invention discloses a power supply control circuit and an optical beauty device. The power supply control circuit includes: a key module, a first power supply control module, a second power supply control module, and a third power supply control module; the key module is configured to output a first control signal to the first power supply control module and the system to be powered when a key is pressed; the second power supply control module is configured to receive a power signal output by the third power supply control module and output a second control signal to the first power supply control module when receiving a power supply control signal output by the system to be powered; the first power supply control module is configured to output a third control signal to the third power supply control module when receiving the first control signal or the second control signal; the third power supply control module is configured to output a power supply voltage when receiving the third control signal, so that the system to be powered continuously outputs a power supply control signal or stops inputting a power supply control signal according to the first control signal. The present invention can improve the flexibility of circuit routing.

Description

Technical Field

[0001] The present invention relates to the technical field of power supply control circuits, and particularly to a power supply control circuit and a light beauty device. Background Art

[0002] In existing light beauty devices, to reduce power consumption, most current power supply control circuits power control methods are to make the main control chip in the circuit enter the low-power mode when shutting down. At the same time, a button is set in the power supply control circuit, making it have two functions of controlling the circuit to turn on and the device function button at the same time. When turning on, the wake-up pin of the main control chip is triggered through this button, making the main control chip start to work normally. However, this way of reducing power consumption, when the light beauty device is powered off, the main control chip still needs to standby and consume power, otherwise it cannot be awakened.

[0003] In summary, the power supply control circuit of the light beauty device in the prior art still has relatively large standby power consumption. Summary of the Invention

[0004] The present invention provides a power supply control circuit and a light beauty device to improve the flexibility of circuit routing.

[0005] According to one aspect of the present invention, a power supply control circuit is provided, including:

[0006] A button module, a first power supply control module, a second power supply control module, and a third power supply control module;

[0007] The output end of the button module is electrically connected to the first input end of the first power supply control module and the detection end of the system to be powered, and the input end of the button module is electrically connected to the input end of the third power supply control module;

[0008] The input end of the second power supply control module is electrically connected to the first output end of the system to be powered, the power supply end of the second power supply control module is electrically connected to the output end of the third power supply control module, and the output end of the second power supply control module is electrically connected to the second input end of the first power supply control module;

[0009] The output end of the first power supply control module is electrically connected to the control end of the third power supply control module, and the power supply end of the first power supply control module is electrically connected to the input end of the third power supply control module;

[0010] The input end of the third power supply control module is used to receive a power signal, and the output end of the third power supply control module is electrically connected to the power supply end of the system to be powered;

[0011] The button module includes a button, and the button module is used to output a first control signal to the first power supply control module and the system to be powered when the button is pressed;

[0012] The second power supply control module is used to receive the power supply voltage output by the third power supply control module and output a second control signal to the first power supply control module when receiving the power supply control signal output by the system to be powered;

[0013] The first power supply control module is used to output a third control signal to the third power supply control module when receiving the first control signal or the second control signal;

[0014] The third power supply control module is used to output the power supply voltage when receiving the third control signal, so that the system to be powered is powered on, so that the system to be powered continuously outputs the power supply control signal or stops outputting the power supply control signal according to the first control signal.

[0015] Optionally, the power supply control circuit further includes:

[0016] A relay module;

[0017] The relay module includes a relay coil, a first normally closed switch, a second normally closed switch, a first normally closed contact, a second normally closed contact, a first normally open contact, a second normally open contact and a coil control unit;

[0018] The first end of the relay coil is electrically connected to the output end of the third power supply control module, and the second end of the relay coil is electrically connected to the input end of the coil control unit;

[0019] The output end of the coil control unit is grounded, and the control end of the coil control unit is electrically connected to the second output end of the system to be powered;

[0020] The coil control unit is used to conduct after receiving the relay control signal output by the system to be powered, so that the second end of the relay coil is grounded;

[0021] The first normally closed switch is electrically connected to the input end of the third power supply control module, and the first normally closed contact is electrically connected to the power supply end of the first power supply control module;

[0022] The second normally closed switch is electrically connected to the output end of the second power supply control module;

[0023] The second normally open contact is suspended, the first normally open contact is suspended, and the second normally open contact is electrically connected to the control end of the third power supply control module;

[0024] The first normally closed switch is used to be electrically connected to the first normally closed contact when the relay coil is not powered, and to be electrically connected to the first normally open contact when the relay coil is powered;

[0025] The second normally closed switch is used to be electrically connected to the second normally closed contact when the relay coil is not powered, and to be electrically connected to the second normally open contact when the relay coil is powered.

[0026] Optionally, the button module further includes a first resistor;

[0027] The first end of the first resistor is electrically connected to the first end of the button, and the second end of the first resistor is grounded; the first end of the button is the output end of the button module;

[0028] The second end of the button is the input end of the button module.

[0029] Optionally, the power supply control circuit further includes:

[0030] A button detection module;

[0031] The detection end of the button detection module is electrically connected to the output end of the button module, the output end of the button detection module is electrically connected to the detection end of the system to be powered, and the power supply end of the button detection module is electrically connected to the power output end of the system to be powered;

[0032] The button detection module is configured to convert the level of the first control signal output by the button module and then output it to the system to be powered, so that the system to be powered detects the pressing time of the button, and the system to be powered outputs a power supply control signal or stops outputting a power supply control signal according to the pressing time.

[0033] Optionally, the button detection module includes a first level converter, a first capacitor, and a second resistor;

[0034] The first input end of the first level converter is electrically connected to the output end of the button module, and the first output end of the first level converter is the output end of the button detection module;

[0035] The first power supply end of the first level converter is the power supply end of the button detection module, and is electrically connected to the first end of the first capacitor. The second end of the first capacitor is grounded; the second power supply end of the first level converter is electrically connected to the second end of the first capacitor. The enable end of the first level converter is electrically connected to the first end of the second resistor, and the second end of the second resistor is grounded.

[0036] Optionally, the third power supply control module includes: a third resistor, a first MOS transistor, a second MOS transistor, and a power-off control unit;

[0037] The control end of the second MOS transistor is the control end of the third power supply control module. The first end of the second MOS transistor is grounded, and the second end of the second MOS transistor is electrically connected to the control end of the first MOS transistor and the first end of the third resistor;

[0038] The second end of the third resistor is electrically connected to the second end of the first MOS transistor, and the second end of the first MOS transistor is the output end of the third power supply control module;

[0039] The output terminal of the power-off control unit is electrically connected to the control terminal of the second MOS transistor; the power-off control unit includes a switch, and the power-off control unit is configured to output a power-off control signal to the control terminal of the third power supply control module when the switch is closed.

[0040] Optionally, the power supply control circuit further includes: a first diode, a second diode, a third diode, and a fourth resistor;

[0041] The first end of the first diode and the first end of the third diode are electrically connected and are electrically connected to the power adapter. The second end of the first diode is electrically connected to the first end of the fourth resistor. The second end of the fourth resistor is electrically connected to the first end of the switch and the control terminal of the second MOS transistor. The second end of the switch is grounded;

[0042] The first end of the second diode is electrically connected to the battery. The second end of the third diode and the second end of the second diode are electrically connected to the first end of the first MOS transistor.

[0043] Optionally, the second power supply control module includes: a second level converter and a second capacitor;

[0044] The input terminal of the second level converter is the input terminal of the second power supply control module, and the output terminal of the second level converter is the output terminal of the second power supply control module;

[0045] The first power supply terminal of the second level converter is the power supply terminal of the second power supply control module. The first power supply terminal of the second level converter is electrically connected to the enable terminal of the second level converter and the first end of the second capacitor;

[0046] The second end of the second capacitor is electrically connected to the second power supply terminal of the second level converter, and the second power supply terminal of the second level converter is grounded;

[0047] The third power supply terminal of the second level converter is electrically connected to the power output terminal of the system to be powered.

[0048] Optionally, the first power supply control module includes: an arithmetic unit, a fifth resistor, and a third capacitor;

[0049] The first input terminal of the arithmetic unit is electrically connected to the output terminal of the key module. The second input terminal of the arithmetic unit is electrically connected to the output terminal of the second power supply control module. The first output terminal of the arithmetic unit is connected to the first end of the fifth resistor. The second end of the fifth resistor is the output terminal of the first power supply control module;

[0050] The first power supply terminal of the arithmetic unit is the power supply terminal of the first power supply control module and is electrically connected to the first end of the third capacitor; the second end of the third capacitor is electrically connected to the second power supply terminal of the arithmetic unit, and the second power supply terminal of the arithmetic unit is grounded.

[0051] According to another aspect of the present invention, there is provided a light beauty device including the power supply control circuit according to any of the embodiments of the present invention.

[0052] The power supply control circuit provided by the technical solution of the embodiment of the present invention includes a key module, a first power supply control module, a second power supply control module, and a third power supply control module. Different level signals can be mutually transmitted between the key module, the first power supply control module, the second power supply control module, and the third power supply control module to realize the on / off control of the system, improving the stability of the power supply control circuit; and in this embodiment, when the system is shut down, the power supply system to be powered is completely cut off, ensuring that the system has a low standby power consumption and there is no need to wake up the power supply system to be powered. The key module can be flexibly arranged at any input / output port of the main control chip in the power supply system to be powered, improving the flexibility of the wiring of the power supply control circuit.

[0053] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. Description of the Drawings

[0054] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0055] Figure 1 is a schematic structural diagram of a power supply control circuit provided by an embodiment of the present invention;

[0056] Figure 2 is a schematic structural diagram of another power supply control circuit provided by an embodiment of the present invention. Detailed Embodiments

[0057] In order to enable those skilled in the art to better understand the solution of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0058] It should be noted that in the description of the present invention, the terms "first", "second", etc. in the specification, claims and the above drawings are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances, so that the embodiments of the present invention described here can be implemented in an order other than those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0059] It should be understood that in the prior art, in the standby mode of the optical beauty instrument, the main control chip of the power supply system still needs to be powered, but the power consumption is small, which is called the "low-power standby mode". Because in an optical beauty instrument device with only one function button, the button needs to implement the "low-power standby mode" wake-up function and the button logic input function of the main control chip. However, in this way, the wake-up of the main control chip requires the button to connect to a specific wake-up pin to wake up and detect the button action, and there is only one wake-up pin on the main control chip. Therefore, the wake-up pin and the button detection pin must be the same pin. In this case, if the same button is used to implement power on / off and mode adjustment, it not only increases the pressure on the main control chip, but also greatly limits the flexibility of the circuit routing.

[0060] The embodiment of the present invention provides a power supply control circuit. Figure 1 is a schematic structural diagram of a power supply control circuit provided by an embodiment of the present invention. Refer to Figure 1 , the power supply control circuit includes: a button module 100, a first power supply control module 200, a second power supply control module 300, and a third power supply control module 400; the output terminal A of the button module 100 is electrically connected to the first input terminal B of the first power supply control module 200 and the detection terminal M of the system 700 to be powered; the input terminal C of the button module 100 is electrically connected to the input terminal D of the third power supply control module 400; the input terminal E of the second power supply control module 300 is electrically connected to the first output terminal N of the system 700 to be powered, the power supply terminal F of the second power supply control module 300 is electrically connected to the output terminal G of the third power supply control module 400, and the output terminal H of the second power supply control module 300 is electrically connected to the second input terminal I of the first power supply control module 200.

[0061] The output terminal J of the first power supply control module 200 is electrically connected to the control terminal K of the third power supply control module 400, and the power supply terminal L of the first power supply control module 200 is electrically connected to the input terminal D of the third power supply control module 400; the input terminal D of the third power supply control module 400 is used to receive the power supply signal V_ONE, and the output terminal G of the third power supply control module 400 is electrically connected to the power supply terminal O of the system 700 to be powered.

[0062] The button module 100 includes a button. The button module 100 is configured to output a first control signal to the first power supply control module 200 and the system 700 to be powered when the button is pressed; the second power supply control module 300 is configured to output a second control signal to the first power supply control module 200 when receiving the power supply voltage VDD output by the third power supply control module 400 and when receiving the power supply control signal MCU_Power_Ctrl output by the system 700 to be powered; the first power supply control module 200 is configured to output a third control signal to the third power supply control module 400 when receiving the first control signal or the second control signal; the third power supply control module 400 is configured to output the power supply voltage VDD when receiving the third control signal, so that the system 700 to be powered is powered on, so that the system 700 to be powered continuously outputs the power supply control signal MCU_Power_Ctrl or stops outputting the power supply control signal MCU_Power_Ctrl according to the first control signal.

[0063] Among them, the system 700 to be powered may include a main control chip. When the button of the button module 100 is pressed, the system 700 to be powered can receive the first control signal, and the system 700 to be powered can determine the form in which the button is pressed according to the first control signal, so as to determine the operation intention of the user. For example, it can be determined whether the user accidentally touches the button, or wants to turn on the machine through the button, or wants to turn off the machine through the button. For example, the operation intention of the user can be determined according to the pressing time of the first control signal. Exemplarily, when the system 700 to be powered determines that the user wants to turn on the machine according to the first power supply control signal, it outputs the power supply control signal MCU_Power_Ctrl, and when the system 700 to be powered determines that the user turns off the machine according to the first power supply control signal, it stops outputting the power supply control signal MCU_Power_Ctrl.

[0064] Specifically, when the entire system is in the shutdown state and a key of the key module 100 is pressed, the output terminal A of the key module 100 outputs a first control signal to the first power supply control module 200 and the system to be powered 700. After receiving the first control signal, the first power supply control module 200 outputs a third control signal to the third power supply control module 400. After receiving the third control signal, the third power supply control module 400 outputs a power supply voltage VDD, enabling the system to be powered 700 to be powered on. After the system to be powered 700 is powered on and starts up, when it is determined that it needs to be powered on according to the received first control signal, the system to be powered outputs a power supply control signal MCU_Power_Ctrl. After receiving the power supply voltage VDD output by the third power supply control module 400 and the power supply control signal MCU_Power_Ctrl output by the system to be powered, the second power supply control module 300 outputs a second control signal to the first power supply control module 200. After receiving the second control signal, when the key is released, the first power supply control module 200 continuously outputs a third control signal to the third power supply control module 400, enabling the third power supply control module 400 to continuously output the power supply voltage VDD and continuously power the system to be powered 700, completing the power-on process.

[0065] When the entire system is in the power-on state and a key of the key module 100 is pressed, the system to be powered 700 receives the first control signal. When the system to be powered 700 determines that it needs to be powered off according to the first control signal, it stops outputting the power supply control signal MCU_Power_Ctrl. The second power supply control module 300 stops outputting the second control signal to the first power supply control module 200. The first power supply control module 200 stops outputting the third control signal to the third power supply control module 400. The third power supply control module 400 disconnects and stops outputting the power supply voltage VDD, and the system to be powered 700 is powered off and shut down.

[0066] The power supply control circuit provided by the technical solution of the embodiment of the present invention includes a key module 100, a first power supply control module 200, a second power supply control module 300, and a third power supply control module 400. Different level signals can be mutually transmitted between the key module 100, the first power supply control module 200, the second power supply control module 300, and the third power supply control module 400 to realize the on-off control of the system, improving the stability of the power supply control circuit. And in this embodiment, when the system is shut down, the system to be powered 700 is completely powered off, ensuring that the system has a low standby power consumption. And during the power-on process, there is no need to use a specific pin to wake up the system to be powered 700. The key module 100 can be flexibly arranged at any input / output port of the main control chip in the system to be powered 700, improving the flexibility of the power supply control circuit wiring.

[0067] Optionally, Figure 2It is a schematic structural diagram of another power supply control circuit provided by an embodiment of the present invention. Refer to Figure 2 , the power supply control circuit further includes: a relay module 500; the relay module 500 includes a relay coil K3, a first normally closed switch K1, a second normally closed switch K2, a first normally closed contact 17, a second normally closed contact 19, a first normally open contact 18, a second normally open contact 20, and a coil control unit 510; a first end of the relay coil K3 is electrically connected to an output terminal G of the third power supply control module 400, and a second end of the relay coil K3 is electrically connected to an input terminal of the coil control unit 510; an output terminal of the coil control unit 510 is grounded, and a control terminal M of the coil control unit 510 is electrically connected to a second output terminal of the power supply system to be powered; the coil control unit 510 is configured to conduct electricity after receiving a relay control signal Ctrl_Relay output by the power supply system to be powered, so that the second end of the relay coil K3 is grounded.

[0068] The first normally closed switch K1 is electrically connected to an input terminal D of the third power supply control module 400, and the first normally closed contact 17 is electrically connected to a power supply terminal L of the first power supply control module 200; the second normally closed switch K2 is electrically connected to an output terminal H of the second power supply control module 300; the second normally open contact 20 is floating, the first normally open contact 18 is floating, and the second normally open contact 20 is electrically connected to a control terminal K of the third power supply control module 400; the first normally closed switch K1 is configured to be electrically connected to the first normally closed contact 17 when the relay coil K3 is not powered, and to be electrically connected to the first normally open contact 18 when the relay coil K3 is powered; the second normally closed switch K2 is configured to be electrically connected to the second normally closed contact 19 when the relay coil K3 is not powered, and to be electrically connected to the second normally open contact 20 when the relay coil K3 is powered.

[0069] After the system to be powered on completes booting, it can send a relay control signal Ctrl_Relay to the coil control unit 510. After receiving the relay control signal Ctrl_Relay output by the system to be powered on, the coil control unit 510 is turned on. The first end of the relay coil K3 receives the supply voltage VDD output by the third power supply control module 400, and the relay coil K3 is energized. The first normally closed switch K1 is electrically connected to the first normally open contact 18, and the second normally closed switch K2 is electrically connected to the second normally open contact 20. Then, the power supply terminal L of the first power supply control module 200 is powered off, and the first power supply control module 200 stops working. The output terminal H of the second control module 300 is directly connected to the control terminal K of the third power supply control module 400. The second control signal output by the second control module 300 is directly transmitted to the control terminal K of the third power supply control module 400, and the third power supply control module 400 maintains the on state and continuously outputs the supply voltage VDD. By setting the relay module 500, when the entire power supply control circuit normally supplies power to the system to be powered on, the second power supply control module 300 directly transmits signals to the third power supply control module 400 through the second normally closed switch K2, and the first power supply control module 200 no longer works, reducing the system power consumption.

[0070] When the system shuts down, the system to be powered on stops outputting the relay control signal Ctrl_Relay, the coil control unit 510 is not turned on, the first normally closed switch K1 is electrically connected to the first normally closed contact 17, and the second normally closed switch K2 is electrically connected to the second normally closed contact 20.

[0071] Reference Figure 2 The coil control unit 510 includes: a sixth resistor R6, a seventh resistor R7, and a triode Q3; the first end of the sixth resistor R6 is the control terminal M of the coil control unit 510, the second end of the sixth resistor R6 is electrically connected to the control terminal of the triode Q3 and the first end of the seventh resistor R7, the first end of the triode Q3 is electrically connected to the second end of the relay coil K3, and the second end of the triode Q3 is grounded; the second end of the seventh resistor R7 is electrically connected to the second end of the triode Q3.

[0072] After the control terminal of the triode Q3 receives the relay control signal Ctrl_Relay, the triode Q3 is turned on, the second end of the relay coil K3 is grounded, and the relay coil K3 is energized.

[0073] Optionally, reference Figure 2 The key module 100 further includes a first resistor R1; the first end of the first resistor R1 is electrically connected to the first end of the key S1, and the second end of the first resistor R1 is grounded; the first end of the key S1 is the output terminal A of the key module 100; the second end of the key S1 is the input terminal C of the key module.

[0074] Specifically, when the button S1 is pressed, a first control signal with a high level is output. After the system is shut down, only the power supply terminal L of the first power supply control module 200 has a voltage V_ONE_1, and the input terminal D of the third power supply control module 400 has a power signal V_ONE, and the system to be powered is completely powered off, so the power consumption of the whole system is relatively low.

[0075] Optionally, referring to Figure 2 , the power supply control circuit further includes: a button detection module 600; the detection terminal of the button detection module 600 is electrically connected to the output terminal A of the button module 100, the output terminal N of the button detection module 600 is electrically connected to the detection terminal of the system to be powered, and the power supply terminal of the button detection module 600 is electrically connected to the power output terminal of the system to be powered; the button detection module 600 is configured to convert the level of the first control signal output by the button module 100 and then output it to the system to be powered, so that the system to be powered can detect the pressing time of the button S1, and the system to be powered outputs a power supply control signal MCU_Power_Ctrl or stops outputting the power supply control signal MCU_Power_Ctrl according to the pressing time.

[0076] Among them, the button detection module 600 starts to work after receiving the first level V1 output by the system to be powered at its power supply terminal. The detection terminal of the button detection module 600 receives the first control signal output by the button module 100, converts the level of the first control signal and outputs a digital signal that conforms to the level logic of the system to be powered, so that the system to be powered can detect the pressing method of the button S1, and thus outputs a power supply control signal MCU_Power_Ctrl or stops outputting the power supply control signal MCU_Power_Ctrl. Exemplarily, when it is detected that the pressing time of the button S1 is 1 second, the system to be powered outputs a power supply control signal MCU_Power_Ctrl, and when it is detected that the pressing time of the button S1 is 3 seconds, the system to be powered stops outputting the power supply control signal MCU_Power_Ctrl. After the whole system is powered off, the system to be powered no longer supplies power to the button detection module 600, and the button detection module 600 does not work, further ensuring that the system has a relatively low power consumption.

[0077] Optionally, referring to Figure 2 , the button detection module 600 includes a first level converter U1, a first capacitor C1 and a second resistor R2; the first input terminal 1 of the first level converter U1 is electrically connected to the output terminal A of the button module 100, and the first output terminal 4 of the first level converter U1 is the output terminal N of the button detection module 600.

[0078] The first power supply terminal 5 of the first level converter U1 is the power supply terminal of the key detection module 600 and is electrically connected to the first end of the first capacitor C1. The second end of the first capacitor C1 is grounded; the second power supply terminal 3 of the first level converter U1 is electrically connected to the second end of the first capacitor C1. The enable terminal 2 of the first level converter U1 is electrically connected to the first end of the second resistor R2, and the second end of the second resistor R2 is grounded.

[0079] When the first input terminal 1 of the first level converter U1 receives the first control signal output by the output terminal A of the key module 100, it outputs a digital signal that conforms to the level logic of the system to be powered through level conversion, and outputs the digital signal through the first output terminal 4 of the first level converter U1, so that the system to be powered determines the pressing form of the key S1 according to the digital signal.

[0080] The first power supply terminal 5 of the first level converter U1 is connected to the first level V1. The first level V1 can be 3.3V, and the first level V1 is provided by the system to be powered.

[0081] Optionally, referring to Figure 2 , the third power supply control module 400 includes: a third resistor R3, a first MOS transistor Q1, a second MOS transistor Q2, and a power-off control unit 410; the control terminal of the second MOS transistor Q2 is the control terminal K of the third power supply control module 400. The first end of the second MOS transistor Q2 is grounded, and the second end of the second MOS transistor Q2 is electrically connected to the control terminal of the first MOS transistor Q1 and the first end of the third resistor R3.

[0082] The second end of the third resistor R3 is electrically connected to the second end of the first MOS transistor Q1. The second end of the first MOS transistor Q1 is the output terminal G of the third power supply control module 400; the output terminal of the power-off control unit 410 is electrically connected to the control terminal of the second MOS transistor Q2; the power-off control unit 410 includes a switch S2, and the power-off control unit 410 is configured to output a power-off control signal to the control terminal K of the third power supply control module 400 when the switch S2 is closed.

[0083] Among them, the second MOS transistor Q2 is an N-type MOS transistor, and the first MOS transistor Q1 is a P-type MOS transistor. After the control terminal of the second MOS transistor Q2 receives the third control signal, it conducts. The first end of the second MOS transistor Q2 is grounded, so the control terminal of the first MOS transistor Q1 is grounded, and the first MOS transistor Q1 conducts, thereby outputting the supply voltage VDD.

[0084] The power-off control unit 410 is configured to output a power-off control signal when the switch S2 is closed. After the control terminal of the second MOS transistor Q2 receives the power-off control signal, it cuts off, so that the first MOS transistor Q1 cuts off, stops outputting the supply voltage VDD, and powers off the system to be powered.

[0085] When the entire system shuts down, the first MOS transistor Q1 and the second MOS transistor Q2 in the third power supply control module 400 are both non-conductive, and the entire third power supply control module 400 does not work, further reducing the power consumption of the entire system in the shutdown state.

[0086] Optionally, referring to Figure 2 , the power supply control circuit further includes: a first diode D1, a second diode D2, a third diode D3, and a fourth resistor R4; the first end of the first diode D1 and the first end of the third diode D3 are electrically connected and are electrically connected to the power adapter, the second end of the first diode D1 is electrically connected to the first end of the fourth resistor R4, the second end of the fourth resistor R4 is electrically connected to the first end of the switch S2 and the control end of the second MOS transistor Q2, and the second end of the switch S2 is grounded; the first end of the second diode D2 is electrically connected to the battery, and the second end of the third diode D3 and the second end of the second diode D2 are electrically connected to the first end of the first MOS transistor Q1.

[0087] Wherein, the battery voltage is VBAT and the adapter voltage is 5V. When powered by the power adapter, after the power adapter is turned on, the first diode D1 conducts, and after the control end of the second MOS transistor Q2 receives the voltage of the adapter, it conducts. The first end of the second MOS transistor Q2 is grounded, and the first MOS transistor Q1 conducts, thereby outputting the power supply voltage VDD. When the switch S2 of the power-off control unit 410 is closed, after the control end of the second MOS transistor Q2 receives the power-off control signal, it turns off, and the second end of the switch S2 is grounded, causing the first MOS transistor Q1 to turn off and stop outputting the power supply voltage VDD.

[0088] Optionally, referring to Figure 2 , the second power supply control module 300 includes: a second level converter U2 and a second capacitor C2; the input terminal 6 of the second level converter U2 is the input terminal E of the second power supply control module 300, and the output terminal 11 of the second level converter U2 is the output terminal H of the second power supply control module 300; the first power supply terminal 9 of the second level converter U2 is the power supply terminal F of the second power supply control module 300, and the first power supply terminal 9 of the second level converter U2 is electrically connected to the enable terminal 10 of the second level converter U2 and the first end of the second capacitor C2; the second end of the second capacitor G2 is electrically connected to the second power supply terminal 7 of the second level converter U2, and the second power supply terminal 7 of the second level converter U2 is grounded; the third power supply terminal 8 of the second level converter U2 is electrically connected to the power output terminal of the system to be powered.

[0089] Among them, the input terminal 6 of the second level converter U2 receives the supply voltage VDD output by the third power supply control module 400 and the power supply control signal MCU_Power_Ctrl output by the first output terminal of the system to be powered. The second level converter U2 converts the level of the power supply control signal MCU_Power_Ctrl and outputs a second control signal that conforms to the level of the first power supply control module 200. The third power supply terminal 8 of the second level converter U2 is connected to the first level V1, and the first level V1 can be 3.3V.

[0090] Optionally, referring to Figure 2 , the first power supply control module 200 includes: an arithmetic unit U3, a fifth resistor R5, and a third capacitor C3; the first input terminal 12 of the arithmetic unit U3 is electrically connected to the output terminal A of the key module 100, the second input terminal 13 of the arithmetic unit U3 is electrically connected to the output terminal H of the second power supply control module 300, the first output terminal 15 of the arithmetic unit U3 is connected to the first end of the fifth resistor R5, and the second end of the fifth resistor R5 is the output terminal J of the first power supply control module 200.

[0091] The first power supply terminal 14 of the arithmetic unit U3 is the power supply terminal L of the first power supply control module 200 and is electrically connected to the first end of the third capacitor C3; the second end of the third capacitor C3 is electrically connected to the second power supply terminal 16 of the arithmetic unit U3, and the second power supply terminal 16 of the arithmetic unit U3 is grounded.

[0092] Among them, the arithmetic unit U3 is an OR logic operation unit. The first input terminal 12 of the arithmetic unit U3 receives the first control signal output by the key module 100, and the second input terminal 13 of the arithmetic unit U3 receives the second control signal of the second power supply control module 300. The first control signal and the second control signal are subjected to an OR operation and output through the first output terminal 15 of the arithmetic unit U3.

[0093] Specifically, after the system is shut down, the system to be powered stops inputting the power supply control signal MCU_Power_Ctrl. Only the input terminal D of the third power supply control module 400 has the power signal V_ONE, and the power supply terminal L of the first power supply control module 200 has the voltage V_ONE_1. Therefore, when the system is shut down, only the arithmetic unit U3 of the first power supply control module 200 works. At this time, if the power adapter is connected, only the first diode D1 and the third diode D3 are charged. If the battery is connected, only the second diode D2 is charged. According to the chip manual calculation, it can be found that the sum of the maximum static currents of the entire system is only 15 microamperes. Compared with the static current of 189 microamperes when the power is off in the prior art, the power consumption of the power supply control circuit is greatly reduced.

[0094] Based on the above embodiments, the embodiment of the present invention further provides a light beauty device, including the power supply control circuit described in any of the embodiments of the present invention. The light beauty device can be a light beauty mask or the like.

[0095] Among them, the light beauty device provided by the embodiment of the present invention and the power supply control circuit provided by any embodiment of the present invention have corresponding beneficial effects.

[0096] It should be understood that various forms of the processes shown above can be used, reordering, adding, or deleting steps. For example, the steps described in the present invention can be executed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved. This is not limited herein.

[0097] The above specific embodiments do not constitute a limitation to the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A power supply control circuit, characterized in that, Comprising: A key module, a first power supply control module, a second power supply control module, and a third power supply control module; The output end of the key module is electrically connected to the first input end of the first power supply control module and the detection end of the system to be powered, and the input end of the key module is electrically connected to the input end of the third power supply control module; The input end of the second power supply control module is electrically connected to the first output end of the system to be powered, the power supply end of the second power supply control module is electrically connected to the output end of the third power supply control module, and the output end of the second power supply control module is electrically connected to the second input end of the first power supply control module; The output end of the first power supply control module is electrically connected to the control end of the third power supply control module, and the power supply end of the first power supply control module is electrically connected to the input end of the third power supply control module; The input end of the third power supply control module is used to receive a power signal, and the output end of the third power supply control module is electrically connected to the power supply end of the system to be powered; The key module includes a key, and the key module is used to output a first control signal to the first power supply control module and the system to be powered when the key is pressed; The second power supply control module is used to receive the power supply voltage output by the third power supply control module and output a second control signal to the first power supply control module when receiving the power supply control signal output by the system to be powered; The first power supply control module is used to output a third control signal to the third power supply control module when receiving the first control signal or the second control signal; The third power supply control module is used to output the power supply voltage when receiving the third control signal, so that the system to be powered is powered on, so that the system to be powered continuously outputs the power supply control signal or stops outputting the power supply control signal according to the first control signal.

2. The power supply control circuit according to claim 1, wherein Further comprising: A relay module; The relay module includes a relay coil, a first normally closed switch, a second normally closed switch, a first normally closed contact, a second normally closed contact, a first normally open contact, a second normally open contact, and a coil control unit; The first end of the relay coil is electrically connected to the output end of the third power supply control module, and the second end of the relay coil is electrically connected to the input end of the coil control unit; The output end of the coil control unit is grounded, and the control end of the coil control unit is electrically connected to the second output end of the system to be powered; The coil control unit is used to conduct after receiving the relay control signal output by the system to be powered, so that the second end of the relay coil is grounded; The first normally closed switch is electrically connected to the input end of the third power supply control module, and the first normally closed contact is electrically connected to the power supply end of the first power supply control module; The second normally closed switch is electrically connected to the output end of the second power supply control module; The second normally open contact is suspended, the first normally open contact is suspended, and the second normally open contact is electrically connected to the control end of the third power supply control module; The first normally closed switch is used to be electrically connected to the first normally closed contact when the relay coil is de-energized, and to be electrically connected to the first normally open contact when the relay coil is energized; The second normally closed switch is used to be electrically connected to the second normally closed contact when the relay coil is de-energized, and to be electrically connected to the second normally open contact when the relay coil is energized.

3. The power supply control circuit according to claim 1, wherein The key module further includes a first resistor; The first end of the first resistor is electrically connected to the first end of the key, and the second end of the first resistor is grounded; the first end of the key is the output end of the key module; The second end of the key is the input end of the key module.

4. The power supply control circuit according to claim 1, wherein It further includes: A key detection module; The detection end of the key detection module is electrically connected to the output end of the key module, the output end of the key detection module is electrically connected to the detection end of the to-be-powered system, and the power supply end of the key detection module is electrically connected to the power output end of the to-be-powered system; The key detection module is used to perform level conversion on the first control signal output by the key module and then output it to the to-be-powered system, so that the to-be-powered system detects the pressing time of the key, and the to-be-powered system outputs the power supply control signal or stops outputting the power supply control signal according to the pressing time.

5. The power supply control circuit according to claim 4, wherein The key detection module includes a first level converter, a first capacitor and a second resistor; The first input end of the first level converter is electrically connected to the output end of the key module, and the first output end of the first level converter is the output end of the key detection module; The first power supply end of the first level converter is the power supply end of the key detection module and is electrically connected to the first end of the first capacitor, and the second end of the first capacitor is grounded; the second power supply end of the first level converter is electrically connected to the second end of the first capacitor, the enable end of the first level converter is electrically connected to the first end of the second resistor, and the second end of the second resistor is grounded.

6. The power supply control circuit according to claim 1, characterized in that, The third power supply control module includes: a third resistor, a first MOS transistor, a second MOS transistor and a power-off control unit; The control end of the second MOS transistor is the control end of the third power supply control module, the first end of the second MOS transistor is grounded, and the second end of the second MOS transistor is electrically connected to the control end of the first MOS transistor and the first end of the third resistor; The second end of the third resistor is electrically connected to the second end of the first MOS transistor, and the second end of the first MOS transistor is the output end of the third power supply control module; The output end of the power-off control unit is electrically connected to the control end of the second MOS transistor; the power-off control unit includes a switch, and the power-off control unit is used to output a power-off control signal to the control end of the third power supply control module when the switch is closed.

7. The power supply control circuit according to claim 6, wherein It further includes: A first diode, a second diode, a third diode and a fourth resistor; The first ends of the first diode and the third diode are electrically connected and are electrically connected to a power adapter. The second end of the first diode is electrically connected to the first end of the fourth resistor. The second end of the fourth resistor is electrically connected to the first end of the switch and the control end of the second MOS transistor. The second end of the switch is grounded; The first end of the second diode is electrically connected to a battery. The second end of the third diode and the second end of the second diode are electrically connected to the first end of the first MOS transistor.

8. The power supply control circuit according to claim 1, wherein The second power supply control module includes: a second level converter and a second capacitor; The input end of the second level converter is the input end of the second power supply control module. The output end of the second level converter is the output end of the second power supply control module; The first power supply end of the second level converter is the power supply end of the second power supply control module. The first power supply end of the second level converter is electrically connected to the enable end of the second level converter and the first end of the second capacitor; The second end of the second capacitor is electrically connected to the second power supply end of the second level converter. The second power supply end of the second level converter is grounded; The third power supply end of the second level converter is electrically connected to the power output end of the system to be powered.

9. The power supply control circuit according to claim 1, wherein The first power supply control module includes: an arithmetic unit, a fifth resistor, and a third capacitor; The first input end of the arithmetic unit is electrically connected to the output end of the key module. The second input end of the arithmetic unit is electrically connected to the output end of the second power supply control module. The first output end of the arithmetic unit is connected to the first end of the fifth resistor. The second end of the fifth resistor is the output end of the first power supply control module; The first power supply end of the arithmetic unit is the power supply end of the first power supply control module and is electrically connected to the first end of the third capacitor. The second end of the third capacitor is electrically connected to the second power supply end of the arithmetic unit. The second power supply end of the arithmetic unit is grounded.

10. A light beauty device, characterized in that, A power supply control circuit according to any one of claims 1-9 is included.

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