Power supply control circuit

Abstract

The embodiment of the invention discloses a power supply control circuit which is provided with a power supply module, a control module and a timer, the power supply module is configured to switch between a normal power supply mode and a low power consumption mode, and the control module is configured to output a mode switching signal. And the timer is connected with the control module and the power supply module and is configured to respond to the received mode switching signal, generate a control signal and send the control signal to the power supply module so as to control the power supply module to enter a low-power-consumption mode. Therefore, automatic switching between the normal mode and the low-power-consumption mode can be realized when a mode switching demand exists.

Description

Technical Field

[0001] The present invention relates to the technical field of power electronics, and in particular to a power supply control circuit. Background Art

[0002] Low power control technology is a key technology designed to reduce the energy consumption of electronic devices. It significantly reduces the power consumption of devices during operation by optimizing hardware design, adjusting operating voltage and frequency, and adopting advanced power management strategies. This technology can not only extend battery life and improve user experience, but also help reduce energy consumption and carbon emissions, which is in line with the current global trend of energy conservation and emission reduction.

[0003] In practical applications, low-power control technology covers multiple levels from circuit design to system architecture optimization. For example, by adopting low-power processors, optimizing circuit layout to reduce leakage current, implementing dynamic voltage and frequency adjustment strategies to adapt to different workloads, and using intelligent power management systems to accurately control the power consumption of each component. These measures work together to significantly improve the energy efficiency of the device, allowing it to achieve a more environmentally friendly and energy-saving operating mode while maintaining high performance. Therefore, low-power control technology has become an indispensable and important part of modern electronic equipment design.

[0004] In low-power control technology, the switching method between low-power mode and normal power supply mode is one of the important features to achieve low power consumption of the system. However, in the current low-power control circuit, there is a lack of a solution to automatically enter the low-power mode under predetermined conditions. Summary of the invention

[0005] In view of this, an embodiment of the present invention provides a power supply control circuit, thereby realizing automatic switching between a normal mode and a low power consumption mode when there is a need for mode switching.

[0006] In a first aspect, an embodiment of the present invention provides a power supply control circuit, the circuit comprising:

[0007] A power supply module is configured to switch between a normal power supply mode and a low power consumption mode;

[0008] A control module is configured to output a mode switching signal;

[0009] The timer is connected to the control module and the power supply module, and is configured to generate a control signal in response to receiving a mode switching signal and send the control signal to the power supply module to control the power supply module to enter a low power consumption mode.

[0010] In some embodiments, the control module is connected to the power supply module;

[0011] Wherein, the control module is configured so that when the power supply module operates in a normal power supply mode, the power supply signal provided by the power supply module is in a normal working state.

[0012] In some embodiments, the control module is configured to output a mode switching signal under a predetermined condition, wherein the predetermined condition is completion of task execution or a predetermined working duration.

[0013] In some embodiments, the circuit further comprises:

[0014] The first power source is connected to the timer and is configured to supply power to the timer.

[0015] In some embodiments, the timer includes a delay pin;

[0016] Wherein, the circuit further includes:

[0017] The resistor is connected between the ground terminal and the delay pin.

[0018] In some embodiments, the circuit further comprises:

[0019] The second power supply is connected to the power supply module and is configured to provide an input voltage to the power supply module.

[0020] In some embodiments, the timer includes a trigger pin connected to the second power supply.

[0021] In some embodiments, the circuit further comprises:

[0022] A button is connected between the resistor and the trigger pin.

[0023] In some embodiments, the trigger pin is configured to switch to a low level in response to the key being triggered.

[0024] In some embodiments, the timer is configured to control the power supply module to switch from a low power consumption mode to a normal power supply mode in response to the trigger pin being at a low level.

[0025] The technical solution of the embodiment of the present invention is to set a power supply module, a control module and a timer in the power supply control circuit, wherein the power supply module is configured to switch between the normal power supply mode and the low power consumption mode, the control module is configured to output a mode switching signal, and the timer is connected to the control module and the power supply module, and is configured to generate a control signal in response to receiving the mode switching signal and send it to the power supply module to control the power supply module to enter the low power consumption mode. Thus, automatic switching between the normal mode and the low power consumption mode can be achieved when there is a need for mode switching. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and other objects, features and advantages of the present invention will become more apparent through the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

[0027] Figure 1 is a schematic diagram of a power supply control system according to an embodiment of the present invention;

[0028] Figure 2 is a schematic diagram of a power supply control circuit according to an embodiment of the present invention;

[0029] Figure 3 is a circuit diagram of a power supply control circuit according to an embodiment of the present invention;

[0030] Figure 4 4 is a diagram showing the relationship between parameters and sleep duration according to an embodiment of the present invention. DETAILED DESCRIPTION

[0031] The present application is described below based on embodiments, but the present application is not limited to these embodiments. In the detailed description of the present application below, some specific details are described in detail. It is possible for those skilled in the art to fully understand the present application without the description of these details. In order to avoid confusing the essence of the present application, known methods, processes, flows, components and circuits are not described in detail.

[0032] In addition, persons of ordinary skill in the art will appreciate that the drawings provided herein are for illustration purposes and are not necessarily drawn to scale.

[0033] At the same time, it should be understood that in the following description, "circuit" refers to a conductive loop composed of at least one element or subcircuit through electrical connection or electromagnetic connection. When an element or circuit is said to be "connected to" another element or an element / circuit is said to be "connected between" two nodes, it can be directly coupled or connected to another element or there can be an intermediate element, and the connection between the elements can be physical, logical, or a combination thereof. On the contrary, when an element is said to be "directly coupled to" or "directly connected to" another element, it means that there is no intermediate element between the two.

[0034] Unless the context clearly requires otherwise, the words "include", "comprising" and similar words throughout the application should be interpreted as including rather than exclusive or exhaustive; that is, the meaning is "including but not limited to".

[0035] In the description of this application, it should be understood that the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of this application, unless otherwise specified, the meaning of "plurality" is two or more.

[0036] With the rapid development of the Internet of Things, the application of low-power communication technology in the Internet of Things has become increasingly important. The Internet of Things refers to connecting various physical devices through the Internet to achieve information exchange and collaborative work between devices. Low-power communication technology can effectively solve challenges such as long-term operation of IoT devices, limited energy and long communication distances, and provide support for the sustainable development of the Internet of Things. Specifically, low-power communication technology can extend the battery life of IoT devices, improve the coverage of IoT networks, and reduce the construction and operation costs of IoT.

[0037] IoT devices usually use low power mode to extend battery life. In low power mode, the device will shut down or reduce the power consumption of some functions (such as communication, data processing, etc.), and only retain the necessary monitoring or wake-up mechanism. When the device needs to perform specific tasks or communicate with the outside world, it needs to switch from low power mode to normal power mode.

[0038] However, in the current low-power communication technology of the Internet of Things, when the battery is detected to be low, the device is switched from the normal power mode to the low-power mode. However, after the power consumption task of the power consumption module is completed, the device can be switched to the low-power mode to reduce the loss of power. Therefore, it is necessary to design a power supply control circuit, which can switch the power supply mode to the low-power mode after the power consumption task of the power consumption module is completed, and can wake up the device through manual control when there is a need for power.

[0039] Figure 1 is a schematic diagram of a power supply control system according to an embodiment of the present invention. Figure 1 In the embodiment shown, the power supply control system can be applied to various types of electronic devices, and specifically includes a power supply control circuit 1 and at least one power-consuming module. The power-consuming modules in this figure specifically include 2a, 2b, and 2c.

[0040] Specifically, the power module is a module that realizes the predetermined functions of the electronic device. For example, the power module includes a processor, a memory, a communication module, and an interface component. For example, if the electronic device is a smart speaker, the power module of the smart speaker is a communication module, a sound module, and a volume adjustment module. The power supply control circuit 1 is used to control the power supply mode of the power module 2 by controlling the generated signal. Among them, the power supply control circuit 1 is specifically used to supply power to the power module 2. Specifically, the power supply control circuit 1 is configured to switch the power supply mode of the power module 2 from the normal power supply mode to the low power consumption mode under predetermined conditions. At this time, the power consumption of the power module 2 in the low power consumption mode is lower than that in the normal power supply mode, thereby achieving the effect of saving electric energy.

[0041] When the function of the power module 2 needs to be used again, since the electronic device is in low power consumption mode, it is necessary to switch the power supply mode from low power consumption mode to normal power supply mode. Specifically, the power supply mode of the electronic device is switched by triggering a button of the electronic device, so that the electronic device is awakened from the sleep state.

[0042] Specifically, for example, when a user needs to use the function of a smart speaker, and the smart speaker is in low power mode, it is necessary to switch the power supply mode from low power mode to normal power mode to wake up the smart speaker. At this time, by pressing the wake-up button of the smart speaker, the state of the power supply control circuit 1 of the smart speaker is controlled, so that the power supply mode of the power supply control circuit 1 to the power module 2 is switched from low power mode to normal power mode, and the electronic device starts to work normally. In this way, not only can the power module 2 be switched to low power mode under predetermined circumstances, but also the mode switching can be achieved by pressing a button when the power supply mode needs to be switched from low power mode to normal power mode.

[0043] The embodiment of the present invention sets a power supply module, a control module and a timer in a power supply control circuit, wherein the power supply module is configured to switch between a normal power supply mode and a low power consumption mode, the control module is configured to output a mode switching signal, and the timer is connected to the control module and the power supply module, and is configured to generate a control signal in response to receiving the mode switching signal and send it to the power supply module to control the power supply module to enter a low power consumption mode. Thus, automatic switching between the normal mode and the low power consumption mode can be achieved when there is a need for mode switching.

[0044] Figure 2 is a schematic diagram of a power supply control circuit according to an embodiment of the present invention, such as Figure 1 As shown, the circuit includes a power supply module 11 , a control module 12 and a timer 13 .

[0045] Among them, the power supply module 11 is used to supply power to the control module 12 and other power-consuming modules, which can be implemented specifically through an LDO (Low Dropout Regulator) module, a DC-DC (Direct Current-Direct Current) conversion module, and a POE (Power Over Ethernet) module. The embodiment of the present invention takes the LDO module as an example for explanation. Specifically, the power supply module 11 is configured to switch between a normal power supply mode and a low power consumption mode, wherein the normal power supply mode is a power supply mode that enables the power-consuming module to work normally, and the energy consumption of the power-consuming module in the normal power supply mode is higher. Specifically, the power supply module 11 controls the working state of the power-consuming module 2 through the control signal output by the timer 13.

[0046] The control module 12 is configured to output a mode switching signal, and the mode switching signal is used to control the timer 13 to generate a control signal. The control module 12 can be implemented by an MCU (Microcontroller Unit), an FPGA (Field Programmable Gate Array), a CPLD (Complex Programmable Logic Array), or a Device, complex programmable logic device), in the embodiment of the present invention, the control module 12 is specifically described as an MCU. Specifically, the control module 12 controls the timer 13 to generate a control signal by outputting a mode switching signal. In some embodiments, the control module 12 is configured to output a mode switching signal after the task is completed or the predetermined working time is completed. Specifically, when the power module 2 performs the predetermined task in the normal power supply mode, that is, when the task is completed, the control module 12 outputs a mode switching signal to control the working mode of the power supply module 11 to switch to a low power consumption mode. Among them, the task execution is completed specifically for the task that the power module 2 needs to perform has been completed, and the predetermined working time is specifically for the continuous working time of the power module 2 to reach the predetermined time. When the electronic device needs to be used in the low power consumption mode, the working mode of the power supply module 11 is controlled to switch from the low power consumption mode to the normal power consumption mode by pressing the wake-up button, so that the electronic device can work normally. At this time, the functions of the electronic device that were disabled under low power consumption are reopened.

[0047] The following is an explanation using the electronic device as a smart speaker as an example. After the smart speaker completes the predetermined task in the normal power supply mode, the control module 12 outputs a mode switching signal to control the working mode of the power supply module 11 to switch to the low power consumption mode, and then enters the low power consumption mode. In the low power consumption mode, most functions of the smart speaker are disabled, such as the temperature adjustment function, the hot and cold switching function, and the wind speed adjustment function. When it is necessary to use the functions of the smart speaker in the low power consumption mode, the working mode of the power supply module 11 is controlled to switch from the low power consumption mode to the normal power supply mode by pressing the wake-up button of the smart speaker. At this time, the various functions of the smart speaker are enabled and start to work normally.

[0048] In some embodiments, the control module 12 is connected to the power supply module 11, and the control module 12 is configured to be in a normal working state according to the power supply signal provided by the power supply module 11 when the power supply module 11 is working in the normal power supply mode. It should be noted that the control module can also be powered by connecting an external power supply, and the embodiment of the present invention does not limit this.

[0049] The timer 13 is connected to the control module 12 and the power supply module 11, and is configured to generate a control signal in response to receiving a mode switching signal and send it to the power supply module to control the power supply module to enter a low power consumption mode. Specifically, after receiving the mode switching signal sent by the control module 12, the timer 13 can be implemented by a 555 timer module (a timer based on a 555 series chip such as NE555) or an STM32 (ST Microelectronics 32-bit Microcontroller, STMicroelectronics 32-bit series microcontroller) timer module. Specifically, in an embodiment of the present invention, after receiving the mode switching signal, the timer 13 sends a control signal to the power supply module 11 to control the power supply mode of the power supply module 11 to switch to a low power consumption mode.

[0050] The embodiment of the present invention sets a power supply module, a control module and a timer in a power supply control circuit, wherein the power supply module is configured to switch between a normal power supply mode and a low power consumption mode, the control module is configured to output a mode switching signal, and the timer is connected to the control module and the power supply module, and is configured to generate a control signal in response to receiving the mode switching signal and send it to the power supply module to control the power supply module to enter the low power consumption mode. Thus, automatic switching between the normal mode and the low power consumption mode can be achieved.

[0051] Figure 3 1 is a circuit diagram of a power supply control circuit according to an embodiment of the present invention. The power supply control circuit includes a power supply module 11, a control module 12, a timer 13, a first power supply VCC 1 , Second power supply VCC 2 , button K and resistor R.

[0052] The power supply module 11 includes a VIN pin (Voltage Input), an EN (Enable) pin, a GND (Ground) pin and a VOUT (Voltage Output) pin. Among them, the VIN pin is used to receive the voltage from the power supply, the VOUT pin is the output voltage pin of the power supply module 11, and provides a stabilized and filtered output voltage to supply power to the power-consuming module 2, and the EN pin is used to control the enable or disable state of the power supply module 11. Specifically, after the system is powered on, the EN pin controls the power supply module 11 to be enabled, and when a control signal is received, the power supply module 11 is disabled. The GND pin is used to connect the circuit of the power supply module 11 to the ground terminal to ensure the stability and safety of the circuit. It should be noted that the present application Figure 3 The power supply module 11, the control module 12 and the timer may also include other pins, which is not limited in this embodiment of the present invention.

[0053] The power supply module 11 is connected to the timer module via an enable pin, and is controlled by the timer module to switch the power supply mode. Specifically, after the system is powered on, the power supply module is in the normal power supply mode, and after receiving the control signal, the power supply module switches from the normal power supply mode to the low power consumption mode.

[0054] Take the control module 12 as an MCU as an example for explanation. Specifically, the control module 12 includes a VDD (power supply voltage) pin, a GPIO (General Purpose Input Output) pin, an RF (Radio Frequency) pin, an SCL (Serial Clock) pin, an SDA (Serial Data) pin and a GND pin. The VDD pin is connected to the VOUT pin of the power supply module 11, and is used to receive the working voltage provided by the power supply module 11 to the control module 12. The GPIO pin has input and output functions, that is, it can both receive external signals and output signals to the outside. When configured as an input mode, the GPIO pin is used to read the signal state of the external device, and when configured as an output mode, the GPIO pin is used to send a signal to the external device. In this way, the functions of external communication, control and data acquisition can be realized. In an embodiment of the present invention, the GPIO pin is specifically used to output the mode switching signal after the MCU generates the mode switching signal to realize the control of the timer. The RF pin is used for the input or output of the radio frequency signal. The SCL pin is used to provide a clock signal for serial communication, specifically for controlling bus access and synchronous data transmission. The SDA pin is used to transmit data in serial communication. Specifically, the SDA pin works bidirectionally and can be used as an input pin to receive data or as an output pin to send data. The GND pin connects the circuit of the control module 12 to the ground terminal to ensure the stability and safety of the circuit.

[0055] Specifically, after the work of the power consumption module 2 is completed, the control module 12 first generates a mode switching signal inside the module, and the mode switching signal is used to control the corresponding timer to send a control signal to realize the control of the power supply mode of the power supply module 11. After the mode switching signal is generated, the mode switching signal is output through the GPIO port to control the timer to generate a control signal.

[0056] The timer 13 includes a VDD pin, a GND pin, an EN / ONE_SHOT (trigger) pin, a DELAY / M_DRV (delay) pin, a DRVn (Driver) pin and a DONE (configuration completed) pin. Among them, the VDD pin is connected to the first power supply to provide an operating voltage for the timer 13. The GND pin connects the circuit of the timer 13 to the ground terminal to ensure the stability and safety of the circuit. The trigger pin is used to control the power supply mode of the power supply module 11, and is specifically used for waking up the device under low power consumption. When the level state of the trigger pin is high, the power supply mode of the power supply module 11 is low power consumption mode. When the level state of the trigger pin is switched from high level to low level, the timer 13 is awakened and a drive signal is sent through the drive pin to control the power supply mode of the power supply module 11 to switch from low power consumption mode to normal power supply mode. The delay pin is used to introduce a delay in the circuit, and the propagation speed or delay time of the signal in the circuit is controlled by setting the parameters of the delay pin. In an embodiment of the present invention, a resistor R is connected through the delay pin. When the resistance value of the resistor R is changed, the sleep duration changes accordingly, thereby realizing the control of the sleep duration. The DONE pin is used to indicate that a certain operation or configuration has been completed. In an embodiment of the present invention, the DONE pin is connected to the GPIO pin of the control module 12 to receive a mode switching signal sent by the GPIO pin. The DRVn pin is connected to the EN pin of the power supply module 11, and controls the working state of the power supply module 11 by outputting a control signal. Specifically, after the DONE pin receives the mode switching signal, the DRVn pin sends a control signal to the EN pin of the power supply module 11. After the EN pin receives the control signal, the power supply module 11 enters a low power consumption mode.

[0057] First power supply VCC 1 is connected to the timer 13 and is configured to supply power to the timer 13. Specifically, the first power source VCC 1 The VDD pin of the timer is connected to supply power to the timer 13. In an optional implementation, the first power source is implemented by a lithium battery. 1 The specific type of restrictions.

[0058] Second power supply VCC 2 The second power source VCC is connected to the power supply module 11 and is configured to provide an input voltage to the power supply module 11. 2 The second power source VCC is connected to the VIN pin of the power supply module 11 to supply power to the power supply module 11. 2 It is also connected to the trigger pin of the timer 13 to control the level state of the trigger pin.

[0059] The resistor R is connected between the ground terminal and the delay pin of the timer 13 , and is used to control the sleep time, wherein the sleep time represents the sleep time of the power module once. Specifically, the sleep time is related to the value of the resistor R.

[0060] In an optional implementation, the calculation formula between the resistance value of the resistor R and the duration of each sleep state is as follows:

[0061]

[0062] Wherein, T is the sleep time, and the values ​​of system parameters a, b, and c are determined according to the interval of the sleep time.

[0063] Figure 4 is a diagram showing the relationship between the parameters and the sleep duration of an embodiment of the present invention, such as Figure 4 As shown, the sleep time T is pre-divided into five intervals, and within each sleep time interval, a set of a, b, and c values ​​corresponds. When the sleep time needs to be set to a certain value, first determine the interval corresponding to the value, and determine the specific values ​​of a, b, and c, then substitute the values ​​of a, b, c, and T into the formula to calculate the value of R, and then set the resistor R in the power supply control circuit according to the value of R, so that the sleep time is realized to be a predetermined value.

[0064] The following is an example. For example, if the sleep time needs to be set to 5.5s, since 5.5s belongs to the interval (5, 10], the resistance is calculated according to a=-0.1284, b=46.9861, c=-2651.8889. After the above formula is used to calculate, R=6972.5Ω is obtained. After the value of R is obtained, the resistance value of the resistor R in the power supply control circuit is set to 6972.5Ω according to the value of R, thereby achieving that the sleep time of the power supply control circuit meets the predetermined sleep time.

[0065] It should be noted that the corresponding relationship between the sleep time T and the resistance R is not limited to the above formula and the above table, and the specific relationship can be actually set according to the type and parameters of the timer.

[0066] The button K is connected between the resistor R and the trigger pin of the timer 13, and is used to control the level state of the trigger pin in the timer 13, thereby realizing the control of the power supply module. Specifically, the user can trigger the button K by pressing the wake-up button in the electronic device. After the button K is triggered, the button K is switched from the off state to the on state, thereby controlling the trigger pin of the timer 13 to switch from a high level to a low level. At this time, the timer enters a normal working state, thereby controlling the power supply module 11 to enter a normal power supply mode.

[0067] In some embodiments, key K is a single-trigger mechanical key. When the user presses the wake-up button in the electronic device, key K is triggered, and key K switches from the off state to the on state. When the user releases the wake-up button, key K switches from the on state back to the off state.

[0068] In some embodiments, the second power supply VCC 2 With node a 1 A pull-up resistor is also included between them, wherein the resistance of the pull-up resistor is much greater than the resistance of the resistor R. Specifically, when the key K is not triggered, the trigger pin of the timer 13 is connected to the second power supply VCC through the pull-up resistor. 2 , the trigger pin is at a high level. When the button K is triggered and turned on, the pull-up resistor and the resistor R form a voltage divider circuit, wherein the voltage at the trigger pin of the timer 13 is the divided voltage of the resistor R. Since the resistance of the pull-up resistor is much greater than the resistance of the resistor R, the divided voltage of the resistor R approaches zero, and the trigger pin is at a low level.

[0069] The following Figure 3 Taking the power supply control circuit shown as an example, the entire workflow is explained. First, when the user starts the electronic device, each module of the electronic device is powered on, and after each module is powered on, the electronic device performs its predetermined function. After the electronic device completes its function, the control module generates a mode switching signal, and the GPIO pin of the control module sends the mode switching signal to the timer. The timer receives the mode switching signal by configuring the completion pin, and generates a control signal after receiving the mode switch. After the control signal is generated, the control signal is sent to the power supply module through the drive pin, and the enable pin of the power supply module receives the drive signal, so that the power supply module enters the low power consumption mode. After entering the low power consumption mode, the power supply module and the control module are both in a power-off loading state, that is, the power supply module no longer supplies power to the control module, the control module also stops sending the mode switching signal, and the timer module also stops sending the control signal. At this time, the pins of the timer except the trigger pin are in a closed state, and the timer is powered by the first power supply.

[0070] When the user needs to enable the electronic device in sleep mode, the trigger pin of the timer is switched from a high level to a low level by triggering a button. When the trigger pin of the timer is at a low level, the timer is awakened, and a drive signal is sent to the power supply module through the drive pin of the timer. The power supply module receives the drive signal through the enable pin, and then switches from the low power consumption mode to the normal power supply mode. After the power supply module switches to the normal power supply mode, the device is awakened.

[0071] The following is still a specific example of a smart speaker. When the user turns on the switch of the smart speaker, the smart speaker is powered on internally. After the power-on is completed, the smart speaker enters the normal power mode and starts working. After the broadcast content is completed, that is, after the task is completed, the power mode of the smart speaker needs to be switched from the normal mode to the low power mode. At this time, the control module generates a mode switching signal, and the GPIO pin of the control module sends the mode switching signal to the configuration completion pin of the timer. After the configuration completion pin of the timer receives the mode switching signal, the timer sends a control signal through the drive pin, and the power supply module receives the control signal through the enable pin, and switches from the normal power supply mode to the low power mode according to the control signal. In the low power mode, the power supply module and the control module are both in the power-off state, and the timer is in the working state except for the trigger pin, and other pins are also in the closed state. When the smart speaker needs to be used in sleep mode, the user triggers button K by pressing the wake-up button on the smart speaker. After button K is triggered, the trigger pin of the timer switches from a high level to a low level, thereby waking up the timer, and then sending a drive signal to the enable pin of the power supply module through the drive pin, so that the power supply module 11 enters the normal power supply mode, and the smart speaker is awakened and can work normally.

[0072] After the user has finished using the smart speaker, the smart speaker needs to switch from the normal power supply mode back to the low power consumption mode. At this time, the control module generates a mode switching signal, and the GPIO pin of the control module sends the mode switching signal to the configuration completion pin of the timer. After receiving the mode switching signal, the timer sends a control signal through the drive pin. The power supply module receives the control signal through the enable pin and switches from the normal power supply mode back to the low power consumption mode according to the control signal.

[0073] The embodiment of the present invention sets a power supply module, a control module and a timer in a power supply control circuit, wherein the power supply module is configured to switch between a normal power supply mode and a low power consumption mode, the control module is configured to output a mode switching signal, and the timer is connected to the control module and the power supply module, and is configured to generate a control signal in response to receiving the mode switching signal and send it to the power supply module to control the power supply module to enter a low power consumption mode. Thus, automatic switching between the normal mode and the low power consumption mode can be achieved when there is a need for mode switching.

[0074] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A power supply control circuit, characterized in that: The circuit comprises: A power supply module is configured to switch between a normal power supply mode and a low power consumption mode; A control module is configured to output a mode switching signal; The timer is connected to the control module and the power supply module, and is configured to generate a control signal in response to receiving a mode switching signal and send the control signal to the power supply module to control the power supply module to enter a low power consumption mode.

2. The circuit according to claim 1, characterized in that The control module is connected to the power supply module; Wherein, the control module is configured so that when the power supply module operates in a normal power supply mode, the power supply signal provided by the power supply module is in a normal working state.

3. The circuit according to claim 1, characterized in that The control module is configured to output a mode switching signal under a predetermined condition, wherein the predetermined condition is completion of task execution or a predetermined working time.

4. The circuit according to claim 1, characterized in that The circuit further comprises: The first power source is connected to the timer and is configured to supply power to the timer.

5. The circuit according to claim 1, characterized in that The timer includes a delay pin; Wherein, the circuit further includes: The resistor is connected between the ground terminal and the delay pin.

6. The circuit according to claim 5, characterized in that The circuit further comprises: The second power supply is connected to the power supply module and is configured to provide an input voltage to the power supply module.

7. The circuit according to claim 6, characterized in that The timer includes a trigger pin connected to the second power supply.

8. The circuit according to claim 7, characterized in that The circuit further comprises: A button is connected between the resistor and the trigger pin.

9. The circuit according to claim 8, characterized in that The trigger pin is configured to switch to a low level in response to the key being triggered.

10. The circuit according to claim 9, characterized in that The timer is configured to control the power supply module to switch from a low power consumption mode to a normal power supply mode in response to the trigger pin being at a low level.

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