Startup and shutdown control device, power management system and electronic equipment

Abstract

The embodiment of the invention provides a startup and shutdown control device, a power management system and electronic equipment. The on-off control device is used for the power supply control device, and the power supply control device comprises a standby power supply module and a control module. The on-off control device comprises an on-off detection circuit, the first input end of the on-off detection circuit is used for being connected with the control module, and the output end of the on-off detection circuit is used for being connected with the standby power supply module. The startup and shutdown detection circuit is used for sending a first shutdown signal to the standby power supply module when the control module outputs the first control signal so as to control the standby power supply module to be shut down. According to the scheme, unnecessary energy loss can be avoided.

Description

Technical Field

[0001] This application relates to the field of power on / off control technology, and more specifically to a power on / off control device, a power management system, and an electronic device. Background Technology

[0002] In electronic devices such as ultrasound equipment and laptops, it is necessary to control the power on and off of the electronic devices.

[0003] In related technologies, even after electronic devices such as ultrasound equipment and laptops are turned off, some circuits that could operate in standby mode remain active. This results in unnecessary energy loss. Summary of the Invention

[0004] This application is made in view of the above-mentioned problems. This application provides a power on / off control device, a power management system, and an electronic device.

[0005] According to one aspect of this application, a power-on / off control device is provided for a power supply control device, the power supply control device including a standby power supply module and a control module; the power-on / off control device includes a power-on / off detection circuit, a first input terminal of the power-on / off detection circuit is connected to the control module, and an output terminal of the power-on / off detection circuit is connected to the standby power supply module; the power-on / off detection circuit is used to send a first power-off signal to the standby power supply module when the control module outputs a first control signal, so as to control the standby power supply module to turn off.

[0006] For example, the power supply control device further includes a power switch; the control module is connected to the power switch and is used to output a first control signal when the signal output by the power switch is an off signal.

[0007] For example, the shutdown signal includes a normal shutdown signal; the power supply control device further includes a main power supply module, a motherboard detection circuit, and a motherboard processor; the input terminal of the motherboard detection circuit is connected to the power switch, and the output terminal of the motherboard detection circuit, the input terminal of the main power supply module, and the input terminal of the control module are respectively connected to the motherboard processor; the standby power supply module is connected to the motherboard detection circuit to supply power to the motherboard detection circuit; the motherboard detection circuit is used to send a first shutdown detection signal to the motherboard processor when the signal output by the power switch is a normal shutdown signal; the motherboard processor is used to send a second shutdown signal to the main power supply module to control the main power supply module to shut down and send a shutdown command to the control module after receiving the first shutdown detection signal in response to the received user shutdown command; wherein, the control module is specifically used to output a first control signal when it receives the shutdown command and detects that the motherboard processor outputs a second shutdown signal.

[0008] For example, the shutdown signal includes a timeout shutdown signal; the power on / off control device further includes a sampling circuit; the sampling circuit is connected in series between the control module and the power switch; the sampling circuit is used to: output a sampling signal to the control module when the signal output by the power switch is a timeout shutdown signal; the control module is used to output a first control signal when it receives the sampling signal.

[0009] For example, the power supply control device further includes a main power supply module, a motherboard detection circuit, and a motherboard processor; the input terminal of the motherboard detection circuit is connected to the power switch, and the output terminal of the motherboard detection circuit, the input terminal of the main power supply module, and the input terminal of the control module are respectively connected to the motherboard processor; the standby power supply module is connected to the motherboard detection circuit to supply power to the motherboard detection circuit; the motherboard detection circuit is used to send a second shutdown detection signal to the motherboard processor when the signal output by the power switch is a timeout shutdown signal, and the motherboard processor is used to send a second shutdown signal to the main power supply module to control the main power supply module to shut down after receiving the second shutdown detection signal; wherein, the control module is specifically used to output a first control signal when it receives a sampling signal and detects that the motherboard processor outputs a second shutdown signal.

[0010] For example, the power-on / off control device further includes a first voltage output circuit; the output terminal of the first voltage output circuit is connected to the first input terminal of the power-on / off detection circuit, and the input terminal of the first voltage output circuit is used to connect to the output terminal of the control module; the first voltage output circuit is used to receive a first control signal output by the control module, generate a first target voltage value based on the first control signal, and output the first target voltage value to the power-on / off detection circuit; the power-on / off detection circuit is used to send a first power-off signal to the standby power supply module when it receives the first target voltage value.

[0011] For example, the power supply control device further includes a power switch; a power-on / off detection circuit is also used to connect to the power switch; the power-on / off detection circuit is used to detect the signal output by the power switch, and when the signal output by the power switch is a first turn-on signal, it sends a power-on signal to the standby power supply module to control the standby power supply module to turn on.

[0012] For example, the power supply control device further includes a main power supply module, a motherboard detection circuit, and a motherboard processor; the input terminal of the motherboard detection circuit is connected to the power switch, and the output terminal of the motherboard detection circuit and the input terminal of the main power supply module are respectively connected to the motherboard processor; the control module is connected to the standby power supply module; the standby power supply module is connected to the motherboard detection circuit to supply power to the motherboard detection circuit; the power on / off control device further includes a second voltage output circuit; the first terminal of the second voltage output circuit is used to connect to the control module, and the second terminal of the second voltage output circuit is used to connect to the power switch at the first node; the control module is used to send a second control signal to the second voltage output circuit after the standby power supply module is turned on; the second voltage output circuit is used to adjust the voltage at the first node to a second target voltage value via the second terminal when it receives the second control signal via the first terminal, so that the power switch outputs a second turn-on signal; the motherboard detection circuit is used to detect the signal output by the power switch, and when it detects that the signal output by the power switch is the second turn-on signal, it sends a turn-on detection signal to the motherboard processor; the motherboard processor is used to send a third control signal to the main power supply module after receiving the turn-on detection signal, so as to control the main power supply module to turn on.

[0013] For example, the power on / off control device further includes a power output circuit; the output terminal of the power output circuit is connected to the second terminal of the second voltage output circuit at the second node, and the potentials of the first node and the second node are equal; the power output circuit is used to output a third target voltage value to the second node when the power switch does not output an on signal or an off signal, wherein the third target voltage value is different from the second target voltage value.

[0014] For example, the second input terminal of the power-on / off detection circuit is connected to the battery to sample the actual voltage value output by the battery; the power-on / off detection circuit is also used to send a first power-off signal to the standby power supply module when the actual voltage value is lower than the voltage threshold, so as to control the standby power supply module to turn off.

[0015] According to another aspect of this application, a power management system is provided, including the above-described power on / off control device and power supply control device.

[0016] According to another aspect of this application, an electronic device is provided, including the power management system described above.

[0017] For example, the electronic device is an ultrasonic device.

[0018] According to the above technical solution, the power-on / off detection circuit can send a first power-off signal to the standby power supply module when the control module outputs a first control signal, thereby controlling the standby power supply module to shut down. Thus, in this technical solution, the standby power supply module can be shut down using the first control signal when the electronic device is powered off, thereby avoiding unnecessary energy loss. In applications using batteries as a power source, this solution can help improve the battery charge retention time after the electronic device is powered off, reduce battery charge loss, and thus help reduce the operating cost of the electronic device.

[0019] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0020] The above and other objects, features, and advantages of this application will become more apparent from the more detailed description of the embodiments of this application in conjunction with the accompanying drawings. The accompanying drawings are used to provide a further understanding of the embodiments of this application and form part of the specification. They are used together with the embodiments of this application to explain this application and do not constitute a limitation thereof. In the accompanying drawings, the same reference numerals generally represent the same components or steps.

[0021] Figure 1 A schematic diagram of an ultrasonic device according to an embodiment of the related art is shown;

[0022] Figure 2 A schematic diagram of a power management system according to an embodiment of this application is shown;

[0023] Figure 3 A circuit diagram of a power on / off control device according to a specific embodiment of this application is shown;

[0024] Figure 4 A schematic block diagram of a power management system according to an embodiment of this application is shown;

[0025] Figure 5 A schematic block diagram of an electronic device according to an embodiment of this application is shown. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this application more apparent, exemplary embodiments according to this application will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are merely a part of the embodiments of this application, and not all of the embodiments of this application. It should be understood that this application is not limited to the exemplary embodiments described herein. Based on the embodiments described in this application, all other embodiments obtained by those skilled in the art without inventive effort should fall within the protection scope of this application.

[0027] In electronic devices such as ultrasound equipment and laptops, it is necessary to control the power on and off of the electronic devices. The following explanation mainly uses the power management system of ultrasound equipment as an example. Figure 1 A schematic diagram of an ultrasonic device according to one embodiment of the related art is shown. In this embodiment, the ultrasonic device includes a main power supply module and a standby power supply module. Figure 1 As shown, the AC mains power is transformed by a 24V transformer module and then supplied to the main power supply module and standby power supply module via the VBUS power line. The battery is also supplied to the main power supply module and standby power supply module via VBUS. The main power supply module may include multiple 12V modules (12V1, 12V2, 12V3) to power the circuits on the main board of the ultrasound equipment and the ultrasound front end. The standby power supply module is a 5VSB module, which can supply power to a small number of circuits on the main board (such as the main board detection circuit used to detect whether the power button is pressed).

[0028] exist Figure 1 In the illustrated embodiment, after the ultrasound device is connected to a power source (e.g., AC power or battery power), the 5VSB outputs voltage to enable a small number of circuits on the ultrasound device's motherboard to operate. When the ultrasound device is powered on, the user can press the power button to initiate the power-on process. This process includes: the ultrasound device's motherboard outputs a low-level PS_ON signal to the main power supply module. Upon receiving this low-level signal, the main power supply module turns on. Once the main power supply module is normally powered on, it generates a PGOOD signal and sends it to the motherboard. Upon receiving the PGOOD signal, the motherboard confirms that the main power supply module is outputting normally, and the power supply to the various circuits on the motherboard is then sequentially activated, allowing the ultrasound device to start normally. When the ultrasound device is powered off, the motherboard outputs a high-level PS_ON signal. After this high-level signal is sent to the main power supply module, the main power supply module turns off, and the ultrasound device is powered off. In the above embodiment, the energy consumption of the electronic device after power-off is illustrated using an ultrasound device as an example. It is understood that the electronic device is not limited to an ultrasound device, and the above embodiments are not intended to limit the electronic device described in this application. Electronic devices can also include, for example, any device such as a laptop computer that can use a standby power module to power at least some of the circuitry on the motherboard when it is powered off.

[0029] As mentioned above, even after the ultrasound equipment is powered off, the 5VSB continues to supply power, and some circuits on the motherboard (such as the motherboard detection circuit) remain operational. This results in unnecessary energy loss, impacting the user experience. This is especially true in battery-powered applications, reducing battery life. Some embodiments in related technologies reduce energy loss by decreasing the number of circuits connected to the 5VSB. However, this method still involves circuit power consumption, and the power supply to the 5VSB and the 5VSB powering the motherboard involve two stages of power conversion, which also introduces losses. Therefore, this application provides a power-on / off control device, a power management system, and an electronic device. This device can reduce energy loss after the equipment is powered off. The power-on / off control device, power management system, and electronic device will be described in detail below.

[0030] According to one aspect of this application, a power-on / off control device is provided. This power-on / off control device is used in a power supply control device, which includes a standby power supply module and a control module. The power supply control device includes a power-on / off detection circuit, a first input terminal of which is connected to the control module, and an output terminal of which is connected to the standby power supply module. The power-on / off detection circuit is used to send a first power-off signal to the standby power supply module when the control module outputs a first control signal, thereby controlling the standby power supply module to turn off.

[0031] For ease of description, the structure of the power management system will be introduced first. Figure 2 A schematic diagram of a power management system according to an embodiment of this application is shown. Figure 2 As shown, the power management system 200 includes a power on / off control device 210 and a power supply control device 220. The power on / off control device 210 includes a power on / off detection circuit 211, and the power supply control device 220 includes a control module 221 and a standby power supply module 222. The first input terminal of the power on / off detection circuit 211 is connected to the control module 221, and the output terminal of the power on / off detection circuit 211 is connected to the standby power supply module 222.

[0032] Optionally, the standby power supply module can be any existing or future-developed power supply module used to power at least a portion of the circuitry on the motherboard of an electronic device that operates in standby mode after the electronic device is powered off. For example, the standby power supply module can be a 5VSB module.

[0033] Optionally, the control module may include any suitable processing device with data processing and / or instruction execution capabilities. For example, the control module may be implemented using one or a combination of several of the following processing units: programmable logic controller (PLC), digital signal processor (DSP), field-programmable gate array (FPGA), programmable logic array (PLA), central processing unit (CPU), application-specific integrated circuit (ASIC), microcontroller unit (MCU), and other types of processing units.

[0034] Optionally, the power-on / off detection circuit may include any existing or future-developed monitoring chip capable of monitoring a specific signal and sending a first power-off signal to the power supply module (e.g., a standby power supply module) based on that specific signal. This specific signal may be the first control signal described above, or the first target voltage value described below. Optionally, the power-on / off detection circuit may also include electronic components such as resistors and capacitors; the specific types and connection methods of these electronic components can be configured as needed and will not be elaborated further.

[0035] Optionally, the control module can respond to a user's power-off control operation by outputting a first control signal. This power-off control operation can be the user clicking a virtual button (e.g., a "power off" button) on the electronic device's display interface, or it can be the user clicking a physical button on the electronic device (e.g., a physical button on the device). Figure 1 The operation of the power button (or power switch) in the electronic device. In some embodiments, when the user clicks the power button, a pop-up window may appear on the display interface of the electronic device, prompting options such as power off, standby, restart, and cancel. When the user selects power off, the control module outputs a first control signal. In this embodiment, the power-off control operation can be the user clicking the power button and selecting the power-off option on the display interface.

[0036] Optionally, the first control signal can be a level signal. For example, the first control signal can be a low-level signal or a high-level signal. Alternatively, the first control signal can also be a specific voltage value. This specific voltage value can be any voltage value within a preset voltage range or a fixed voltage value. In this embodiment, the power-on / off detection circuit can send a first power-off signal to the standby power supply module when the control module outputs the specific voltage value, thereby controlling the standby power supply module to turn off.

[0037] Optionally, the first power-off signal can be an electrical level signal or a specific voltage value. In one specific embodiment, the first power-off signal can be a low-level signal. In this embodiment, the power-on / off detection circuit can send a low-level signal to the standby power supply module to control the standby power supply module to turn off.

[0038] Optionally, the control module can be directly or indirectly connected to the power-on / off detection circuit. In some embodiments, the control module can be directly connected to the first input terminal of the power-on / off detection circuit. In this case, the control module can directly output a first control signal to the power-on / off detection circuit. The power-on / off detection circuit can send a first power-off signal upon receiving the first control signal. In other embodiments, the control module can be indirectly connected to the power-on / off detection circuit. In other words, other circuits, such as a voltage output circuit (e.g., the first voltage output circuit described below), can be connected in series between the control module and the power-on / off detection circuit. In this case, the control module can output the first control signal to the voltage output circuit. The voltage output circuit can output a specific voltage value or a specific signal to the power-on / off detection circuit after receiving the first control signal. The power-on / off detection circuit can send a first power-off signal after receiving the specific voltage value or specific signal output by the voltage output circuit.

[0039] Optionally, the power supply control device may further include a main power supply module, a motherboard detection circuit, and a motherboard processor. The input terminal of the motherboard detection circuit is connected to the power switch, and the output terminal of the motherboard detection circuit, the input terminal of the main power supply module, and the input terminal of the control module are respectively connected to the motherboard processor. The standby power supply module is connected to the motherboard detection circuit to supply power to it. The motherboard (or motherboard side) of the electronic device may include a motherboard detection circuit and a motherboard processor. The motherboard detection circuit and the motherboard processor may be integrated on the same circuit board or separately mounted on different circuit boards. The motherboard processor may include any suitable processing device with data processing and / or instruction execution capabilities. For example, the motherboard processor may be implemented using one or more of the following: a programmable logic controller (PLC), a digital signal processor (DSP), a field-programmable gate array (FPGA), a programmable logic array (PLA), a central processing unit (CPU), an application-specific integrated circuit (ASIC), a microcontroller unit (MCU), and other forms of processing units. The motherboard processor can be considered the core processor of the electronic device, which can be used to control most of the circuits, components, or parts on the electronic device, and / or perform more complex data processing and calculations. The motherboard detection circuit can send a corresponding shutdown detection signal to the motherboard processor when the user normally presses (shortly presses) the power button and inputs a shutdown command (see the embodiment described below where the power switch outputs a normal shutdown signal) or when the user presses and holds the power button (see the embodiment described below where the power switch outputs a timeout shutdown signal). Upon receiving the shutdown detection signal, the motherboard processor can send a second shutdown signal to the main power supply module to control the main power supply module to shut down. The control module can output a first control signal after the main power supply module shuts down. For ease of distinction, the shutdown signal sent by the power-on / off detection circuit to the standby power supply module can be called the first shutdown signal, and the shutdown signal sent by the motherboard processor to the main power supply module can be called the second shutdown signal. The signal form of the second shutdown signal can be similar to the first shutdown signal, and will not be elaborated here. In the above optional embodiments, the operation of the power-on / off detection circuit sending the first shutdown signal is performed after the main power supply module is shut down. In the scheme of this embodiment, when shutting down, the motherboard processor can send a second shutdown signal to the main power supply module. After the main power supply module shuts down, the control module outputs a first control signal so that the power-on / off detection circuit can send the first shutdown signal. In other words, the main power supply module and the standby power supply module can be shut down sequentially. It's understood that the standby power supply module provides power to the motherboard's detection circuitry. By shutting down the standby power supply module after the main power supply module, it avoids the standby power supply module shutting down too early, which could prevent the motherboard's detection circuitry from outputting a shutdown detection signal, and consequently, prevent the motherboard processor from outputting a second shutdown signal. This solution helps improve the reliability of power-on / off control.

[0040] As mentioned above, in related technologies, the 5VSB circuit continues to supply power even after the ultrasonic equipment is powered off, and some circuits on the motherboard (such as the motherboard detection circuit) remain operational. This results in unnecessary energy loss and affects the user experience. In the above technical solution, the power-on / off detection circuit can send a first power-off signal to the standby power supply module when the control module outputs a first control signal, thereby controlling the standby power supply module to shut down. Therefore, in this technical solution, the standby power supply module can be shut down using the first control signal when the electronic device is powered off, thus avoiding unnecessary energy loss. In applications using batteries as a power source, this solution can help improve the battery life retention time after the electronic device is powered off, reduce battery power loss, and thus help reduce the operating cost of the electronic device.

[0041] For example, the power supply control device further includes a power switch; the control module is connected to the power switch and is used to output a first control signal when the signal output by the power switch is an off signal.

[0042] Optionally, the power switch can be any existing or future-developed power switch circuit or power switch module. The signal output by the power switch can be the voltage value of the pin on the power switch used for connection with the control module (which can be simply referred to as the signal pin), or it can be a level signal (high level or low level) output by the power switch. The shutdown signal output by the power switch can include only a normal shutdown signal, only a timeout shutdown signal, or both. A normal shutdown signal can achieve normal shutdown of the electronic device, i.e., non-forced shutdown. A timeout shutdown signal can achieve forced shutdown of the electronic device. When the power switch outputs a normal shutdown signal, a pop-up window can be displayed on the display interface of the electronic device, prompting options such as shutdown, standby, restart, and cancel. When the user selects shutdown (i.e., the motherboard of the electronic device receives the user's shutdown command), the electronic device then initiates the shutdown process to shut down the main power supply module and the standby power supply module. When the power switch outputs a timeout shutdown signal and there is no user shutdown command input, the electronic device's motherboard can monitor the power switch's output signal. When the power switch outputs a timeout shutdown signal, the electronic device can automatically initiate the shutdown process to shut down the main power supply module and the standby power supply module.

[0043] The normal shutdown signal and the timeout shutdown signal can be set as needed, as long as they can be distinguished. The normal shutdown signal and the timeout shutdown signal can be set to signals with different durations. Optionally, when the signal output by the power switch is the voltage value of the signal pin, a normal shutdown signal can be determined if the voltage value of the signal pin falls within a first preset voltage range and the duration within that range does not exceed the first preset duration. Conversely, a timeout shutdown signal can be determined if the voltage value of the signal pin remains within the first preset voltage range for a duration exceeding the first preset duration. Optionally, the first preset duration can be set as needed. For example, the first preset duration can be within the range of [3, 8] seconds (s). Specifically, the first preset duration can be 4s, 5s, 6s, 7s, etc. Optionally, the first preset voltage range can be set as needed. For example, the first preset voltage range can be [0, 1]V. In a specific embodiment, the first preset duration is 4s. The first preset voltage range is [0, 1]V. In this embodiment, when the voltage value of the signal pin is within the first preset voltage range and the duration of the voltage value within the first preset voltage range does not exceed 4 seconds, it can be determined that the power switch outputs a normal shutdown signal. When the voltage value of the signal pin is within the first preset voltage range for more than 4 seconds, it can be determined that the power switch outputs a timeout shutdown signal.

[0044] Optionally, when the power switch outputs a level signal, a normal shutdown signal can be determined if the power switch outputs a first preset level signal and the duration of the output signal does not exceed a second preset duration. Conversely, a timeout shutdown signal can be determined if the power switch continuously outputs the first preset level signal for a duration exceeding the second preset duration. The setting method for the second preset duration is similar to that of the first preset duration and will not be elaborated further. The first preset level signal can be set to a high-level signal or a low-level signal as needed. In a specific embodiment, the second preset duration is 4 seconds. The first preset level signal is a low-level signal. In this embodiment, when the power switch outputs a low-level signal and the duration of the low-level signal does not exceed 4 seconds, a normal shutdown signal can be determined; when the power switch continuously outputs a low-level signal for a duration exceeding 4 seconds, a timeout shutdown signal can be determined.

[0045] In some embodiments, the power switch may include a push-button switch. In this embodiment, the user can control the power switch to output an off signal by controlling the push-button switch, thereby controlling the standby power supply module to turn off. In one specific embodiment, the power switch outputs an off signal when the user presses the push-button switch for more than 4 seconds.

[0046] Optionally, the control module can be directly connected to the power switch. In this embodiment, the control module can directly receive the off signal output by the power switch. Alternatively, the control module can be indirectly connected to the power switch. In this embodiment, the control module can be connected to the power switch through a specific circuit. This specific circuit can be the sampling circuit or the motherboard detection circuit described below. Specific solutions are described in detail below and will not be repeated here.

[0047] In this example, the standby power supply module can be shut down by controlling the power switch to output a shutdown signal. This solution facilitates user control over device shutdown, and this forced shutdown method using the power switch reduces unreliable power-on / off issues caused by device software malfunctions. In summary, this solution helps improve the reliability of power-on / off control.

[0048] For example, the shutdown signal includes a normal shutdown signal; the power supply control device further includes a main power supply module, a motherboard detection circuit, and a motherboard processor; the input terminal of the motherboard detection circuit is connected to the power switch, and the output terminal of the motherboard detection circuit, the input terminal of the main power supply module, and the input terminal of the control module are respectively connected to the motherboard processor; the standby power supply module is connected to the motherboard detection circuit to supply power to the motherboard detection circuit; the motherboard detection circuit is used to send a first shutdown detection signal to the motherboard processor when the signal output by the power switch is a normal shutdown signal; the motherboard processor is used to send a second shutdown signal to the main power supply module to control the main power supply module to shut down and send a shutdown command to the control module after receiving the first shutdown detection signal in response to the received user shutdown command; wherein, the control module is specifically used to output a first control signal when it receives the shutdown command and detects that the motherboard processor outputs a second shutdown signal.

[0049] As described above, the user can briefly press the power switch to output a normal shutdown signal. At this time, the motherboard detection circuit can send a first shutdown detection signal to the motherboard processor. After receiving the first shutdown detection signal, the motherboard processor can control the electronic device's display interface to show a pop-up window prompting options such as shutdown, standby, restart, and cancel. When the user selects shutdown (i.e., enters a user shutdown command), the electronic device can enter the normal shutdown process. For example, in response to the user's shutdown command, the electronic device's motherboard processor can send a second shutdown signal (e.g., a PS_ON high-level signal) to the main power supply module to shut down the main power supply module (i.e., the 12V module). Simultaneously, the motherboard processor can also send a shutdown command to the control module. After receiving the shutdown command, the control module can continue to wait until it detects that the main power supply module is off (e.g., when it detects a PS_ON high-level signal) before outputting a first control signal to shut down the standby power supply module.

[0050] By employing the above embodiments, through the coordinated operation of the motherboard detection circuit, motherboard processor, and control module, the main power supply module and the standby power supply module can be shut down sequentially during the normal shutdown process. Since the normal shutdown process is the shutdown process that is more likely to occur on electronic devices, the application scenarios for shutting down the standby power supply module under this process are quite extensive, which can help electronic devices save energy more effectively.

[0051] For example, the shutdown signal includes a timeout shutdown signal; the power on / off control device further includes a sampling circuit; the sampling circuit is connected in series between the control module and the power switch; the sampling circuit is used to output a sampling signal to the control module when the signal output by the power switch is a timeout shutdown signal; the control module is used to output a first control signal when it receives the sampling signal.

[0052] Optionally, the sampling circuit can be any existing or future-developed circuit capable of acquiring the signal output by the power switch and outputting a sampling signal based on that signal. For example, the sampling circuit may include a first resistor and a diode. The first end of the diode is connected to the second end of the first resistor, and the second end of the diode is connected to the power switch. The first end of the first resistor is connected to the sampling power supply. A control module is used to connect to the sampling point. The sampling point is located between the first resistor and the diode. Exemplarily, a timeout shutdown signal is used to indicate that the voltage value of the signal pin of the power switch remains within a first preset voltage range for a duration exceeding a first preset duration. When the voltage value of the signal pin is within the first preset voltage range, the voltage value of the sampling point is the first voltage value. The first voltage value can be determined according to the structure of the sampling circuit and the actual operating conditions. In this embodiment, the sampling signal is used to indicate that the voltage value of the sampling point remains at the first voltage value for a duration exceeding the first preset duration. It is understood that the above sampling circuit is only an example, and the sampling circuit can also be composed of other electronic components. For example, the diode can be replaced with a Zener diode.

[0053] Figure 3 A circuit diagram of a power-on / off control device according to a specific embodiment of this application is shown. In this embodiment, if the voltage value of the signal pin remains within [0,1]V for more than 4 seconds, a timeout shutdown signal is determined to be output by the power switch. Figure 3As shown, the power switch includes a switch button SW1, one end of which is grounded and the other end is connected to the power-on / off detection circuit. The sampling circuit includes a sampling resistor R1, a diode D1, and a sampling power supply VDD. The first end of diode D1 is connected to the second end of sampling resistor R1, and the second end of diode D1 is connected to the power switch. The first end of sampling resistor R1 is connected to the sampling power supply. In this embodiment, the signal output by the power switch can be represented by the voltage value at point A. Point A can be considered as the signal pin of the power switch. The sampling point is point B. The first voltage value is equal to the voltage drop of diode D1. The sampling signal is Force_ONOFF. When switch button SW1 is pressed, the voltage value at point A is 0, and the voltage value at point B is the voltage drop of diode D1. When switch button SW1 is pressed for more than 4 seconds, the voltage value of the signal pin remains within [0,1]V for more than 4 seconds. In this case, the voltage value at point B is always equal to the voltage drop of diode D1 during the continuous pressing of switch button SW1. In other words, the sampling circuit can generate the sampling signal Force_ONOFF at this time.

[0054] The above technical solution, by setting up a sampling circuit connected in series between the control module and the power switch, can more accurately detect the timeout shutdown signal, thereby helping to improve the reliability of the shutdown control. At the same time, this method of indirectly connecting the power switch using a sampling circuit can prevent the control module's own impedance from interfering with the timeout shutdown signal, thus contributing to improved overall reliability of the power-on / off control device.

[0055] For example, the power supply control device further includes a main power supply module, a motherboard detection circuit, and a motherboard processor; the input terminal of the motherboard detection circuit is connected to the power switch, and the output terminal of the motherboard detection circuit, the input terminal of the main power supply module, and the input terminal of the control module are respectively connected to the motherboard processor; the standby power supply module is connected to the motherboard detection circuit to supply power to the motherboard detection circuit; the motherboard detection circuit is used to send a second shutdown detection signal to the motherboard processor when the signal output by the power switch is a timeout shutdown signal, and the motherboard processor is used to send a second shutdown signal to the main power supply module to control the main power supply module to shut down after receiving the second shutdown detection signal; wherein, the control module is specifically used to output a first control signal when it receives a sampling signal and detects that the motherboard processor outputs a second shutdown signal.

[0056] In some specific implementations of this example, the motherboard detection circuit can monitor the signal output by the power switch. When the user chooses to force shutdown by pressing and holding the power switch (for approximately 4 seconds), the motherboard detection circuit can detect the timeout shutdown signal output by the power switch. At this time, the motherboard detection circuit can send a second shutdown detection signal to the motherboard processor. After receiving the second shutdown detection signal, the motherboard processor can send a second shutdown signal (e.g., a PS_ON high-level signal) to the main power supply module to shut down the main power supply module (i.e., the 12V module). Since no user shutdown command is generated during the forced shutdown process, a sampling circuit can be used to monitor the output signal of the power switch. The sampling circuit is connected to the control module and monitors the power output signal synchronously with the motherboard detection circuit. When the control module detects the timeout shutdown signal through the sampling circuit, it can simultaneously determine whether the second shutdown signal has been generated (e.g., determining the high or low level of PS_ON). When the control module determines that the second shutdown signal has been generated, i.e., determines that the main power supply module is off, the control module can output a first control signal to shut down the standby power supply module. Thus, the main power supply module and the standby power supply module can be shut down sequentially.

[0057] By employing the above embodiments, through the coordinated operation of the motherboard detection circuit, motherboard processor, and control module, the main power supply module and the standby power supply module can be shut down sequentially during a forced shutdown process. This ensures that even in the event of a forced shutdown, the standby power supply module can be successfully shut down, thereby helping electronic devices to better conserve energy.

[0058] For example, the power-on / off control device further includes a first voltage output circuit; the output terminal of the first voltage output circuit is connected to the first input terminal of the power-on / off detection circuit, and the input terminal of the first voltage output circuit is used to connect to the output terminal of the control module; the first voltage output circuit is used to receive a first control signal output by the control module, generate a first target voltage value based on the first control signal, and output the first target voltage value to the power-on / off detection circuit; the power-on / off detection circuit is used to send a first power-off signal to the standby power supply module when it receives the first target voltage value.

[0059] Optionally, the first voltage output circuit can be constructed using any one or more existing or future-developed electronic components. These electronic components include, but are not limited to, metal-oxide-semiconductor field-effect transistors (MOS transistors), bipolar transistors, resistors, etc. This application does not limit the specific results of the first voltage output circuit, as long as the first voltage output circuit can generate a specific voltage value upon receiving the first control signal and display that voltage value.

[0060] In some embodiments, the first voltage output circuit may include a MOSFET. The MOSFET may be a PMOS or an NMOS. The output terminal of the control module is connected to the gate of the MOSFET. The source of the MOSFET is grounded, and the drain of the MOSFET is connected to the first input terminal of the power-on / off detection circuit. A first control signal can be used to control the MOSFET to turn on. The first target voltage value is 0. In this embodiment, when the control module outputs the first control signal, the MOSFET turns on, and the voltage value input to the first input terminal of the power-on / off detection circuit is 0 (i.e., the first target voltage value is received). In this case, the power-on / off detection circuit can send a first power-off signal to the standby power supply module. The circuit structure of this first voltage output circuit is only an example; other circuit structures may also be used. For example, the first voltage output circuit may include a transistor. The transistor may be a PNP or NPN transistor. The base of the transistor is connected to the output terminal of the control module. The emitter of the transistor is grounded, and the collector of the transistor is connected to the first input terminal of the power-on / off detection circuit. The first control signal can be used to control the transistor to turn on. The first target voltage value is 0 (i.e., the first target voltage value is received). In this embodiment, when the control module outputs the first control signal, the transistor is turned on, and the voltage value input to the first input terminal of the power-on / off detection circuit is 0. Under these circumstances, the power-on / off detection circuit can send a first power-off signal to the standby power supply module.

[0061] by Figure 3 The first voltage output circuit will be explained using an example. Figure 3 As shown, the output terminal of the first voltage output circuit is connected to the first input terminal of the power-on / off detection circuit, and the input terminal of the first voltage output circuit is connected to the output terminal of the control module (not shown in the figure). The output terminal of the power-on / off detection circuit is connected to the standby detection module 5VSB. After receiving the first control signal KILL from the control module, the first voltage output circuit can generate a first target voltage value based on the first control signal KILL and output the first target voltage value to the power-on / off detection circuit. When the power-on / off detection circuit receives the first target voltage value, it can send a first power-off signal to the standby power supply module 5VSB to turn off 5VSB.

[0062] In the above technical solution, the first voltage output circuit can generate a first target voltage value upon receiving a first control signal and output the first target voltage value to the power-on / off detection circuit, thereby enabling the power-on / off detection circuit to send a first power-off signal to the standby power supply module. This solution has a simple circuit structure and helps to improve the reliability of the power-off control of the power-on / off control device.

[0063] For example, the power supply control device further includes a power switch; a power-on / off detection circuit is also used to connect to the power switch; the power-on / off detection circuit is used to detect the signal output by the power switch, and when the signal output by the power switch is a first turn-on signal, it sends a power-on signal to the standby power supply module to control the standby power supply module to turn on.

[0064] Optionally, when the signal output by the power switch is a voltage value of a signal pin, the power switch can be determined to output a first turn-on signal when the voltage value of the signal pin remains within a second preset voltage range for a duration exceeding a third preset duration. Optionally, the third preset duration can be set as needed. For example, the third preset duration can be within the range of [120, 200] ms. Specifically, for example, the third preset duration can be 128 ms. Optionally, the second preset voltage range can be set as needed. For example, the second preset voltage range can be [0, 1] V. In a specific embodiment, the third preset duration is 128 ms. The second preset voltage range is [0, 1] V. In this embodiment, when the voltage value of the signal pin remains within the second preset voltage range for a duration exceeding 128 ms, the power switch can be determined to output a first turn-on signal.

[0065] Optionally, when the power switch outputs a level signal, the power switch can be determined to output a first turn-on signal when the duration of its continuous output of a second preset level signal exceeds a fourth preset duration. The setting method for the fourth preset duration is similar to that of the third preset duration and will not be elaborated further. The second preset level signal can be set to a high-level signal or a low-level signal as needed. In a specific embodiment, the fourth preset duration is 128ms. The second preset level signal is a low-level signal. In this embodiment, when the power switch continuously outputs a low-level signal for more than 128ms, the power switch can be determined to output a first turn-on signal.

[0066] In the embodiments where the power switch includes a push-button switch, the user can control the power switch to output a first on signal, thereby controlling the standby power supply module to turn on. In one specific embodiment, the power switch outputs the first on signal when the user presses the push-button switch for more than 128ms.

[0067] In this example, the standby power supply module can be activated by controlling the power switch to output a first power-on signal. This solution is simple to operate and allows users to easily control the device's power-on.

[0068] For example, the power supply control device further includes a main power supply module, a motherboard detection circuit, and a motherboard processor; the input terminal of the motherboard detection circuit is connected to the power switch, and the output terminal of the motherboard detection circuit and the input terminal of the main power supply module are respectively connected to the motherboard processor; the control module is connected to the standby power supply module; the standby power supply module is connected to the motherboard detection circuit to supply power to the motherboard detection circuit; the power on / off control device further includes a second voltage output circuit; the first terminal of the second voltage output circuit is used to connect to the control module, and the second terminal of the second voltage output circuit is used to connect to the power switch at the first node; the control module is used to send a second control signal to the second voltage output circuit after the standby power supply module is turned on; the second voltage output circuit is used to adjust the voltage at the first node to a second target voltage value via the second terminal when it receives the second control signal via the first terminal so that the power switch outputs a second turn-on signal; the motherboard detection circuit is used to detect the signal output by the power switch, and when it detects that the signal output by the power switch is the second turn-on signal, it sends a turn-on detection signal to the motherboard processor; the motherboard processor is used to send a third control signal to the main power supply module after receiving the turn-on detection signal to control the main power supply module to turn on.

[0069] Optionally, the main power supply module can be any existing or future-developed power supply module used to supply power to at least a portion of the non-standby circuitry in the electronic device after it is powered on. Those skilled in the art will understand the difference between a standby power supply module and a main power supply module, which will not be elaborated upon here.

[0070] In this embodiment, the control module can be connected to the standby power supply module and the main power supply module via a serial port. When the standby power supply module is turned on, it indicates that the standby power supply module supplies power to the motherboard detection circuit, control module, etc., until the motherboard detection circuit, control module, etc., complete power-on initialization.

[0071] Similar to the first control signal, the second and third control signals can be level signals or specific voltage values, which will not be elaborated further.

[0072] In this paper, the second terminal of the second voltage output circuit is used to connect to the power switch at the first node. In other words, the second terminal of the second voltage output circuit can be connected to the signal pin of the power switch via the first node, and the potentials of the first node and the signal pin are equal. Therefore, when the second voltage output circuit adjusts the voltage at the first node to the second target voltage value via the second terminal, the voltage value of the signal pin can be made to the second target voltage value.

[0073] Optionally, when the signal output by the power switch is the voltage value of the signal pin, the power switch can be determined to output a second turn-on signal if the voltage value of the signal pin remains within a third preset voltage range for a duration that reaches a fifth preset duration but does not reach the third preset duration. The third preset voltage range can be set as needed. For example, the third preset voltage range can be [0, 1]V. In this embodiment, the fifth preset duration is shorter than the third preset duration. For example, when the third preset duration can be within the range of [120, 200]ms, the fifth preset duration can be within the range of [50, 110]ms. This scheme helps prevent mutual interference between the second turn-on signal and the first turn-on signal, thereby helping to avoid switching logic errors.

[0074] Optionally, when the power switch outputs a level signal, the power switch can output a second turn-on signal when the duration of the third preset level signal output by the power switch reaches a sixth preset duration but does not reach a fourth preset duration. The setting method for the sixth preset duration is similar to that of the fifth preset duration and will not be described in detail. Similar to the second preset level signal, the third preset level signal can be set to a high-level signal or a low-level signal as needed, and will not be described in detail.

[0075] by Figure 3 The second voltage output circuit will be explained using an example. In this embodiment, when the voltage value at the signal pin remains within the range of [0,1]V for 100ms, the power switch outputs a second turn-on signal. Figure 3 As shown, the input terminal of the motherboard detection circuit is connected to the power switch. The first terminal (which can be called the signal input terminal) P1 of the second voltage output circuit is connected to the control module (not shown in the figure), the second terminal (which can be called the control terminal) P2 of the second voltage output circuit is connected to the power switch, and the third terminal (which can be called the ground terminal) P3 of the second voltage output circuit is grounded. The second voltage output circuit can control the control terminal and the ground terminal to be on or off according to the signal input terminal. When the second voltage output circuit receives the fourth control signal MCU_BUTTON, the control terminal and the ground terminal of the second voltage output circuit are continuously connected for 100ms. When the second voltage output circuit is on, it can adjust the voltage of the first node (i.e., point C in the figure) to 0 (i.e., the second target voltage value). In this case, the voltage value of point A remains at 0V for 100ms; in other words, the power switch outputs the second turn-on signal. At this time, the motherboard detection circuit can send a turn-on detection signal to the motherboard processor. After receiving the turn-on detection signal, the motherboard processor can send a third control signal to the main power supply module to control the main power supply module to turn on.

[0076] Optionally, the second voltage output circuit can be constructed using any one or more existing or future-developed electronic components. These electronic components may include, but are not limited to, metal-oxide-semiconductor field-effect transistors (MOS transistors), bipolar transistors, resistors, relay switches, relay coils, optocoupler switches, etc. Figure 3 In the illustrated embodiment, the second voltage output circuit may include an optocoupler switch. The optocoupler switch includes a control element (light-emitting diode) and a switching element (photodiode or phototransistor). In this embodiment, one end of the switching element is connected to a power switch, and the other end is grounded. The input terminal of the control element (equivalent to the input terminal of the second voltage output circuit) is connected to the control module. When the control element receives a fourth control signal, it can control the switching element to conduct, thereby enabling the signal pin of the power switch (i.e.,...) to... Figure 3 Point A in the circuit is grounded. The circuit structure of the second voltage output circuit described above is only an example and is not intended to limit the circuit structure of the second voltage output circuit. Other circuit structures can also be used for the second voltage output circuit. For example, the second voltage output circuit can be a relay. The relay can include a relay coil and a relay switch. The fourth control signal can be used to control the relay coil to be energized. One end of the relay switch (equivalent to the second end of the second voltage output circuit) is connected to the power switch, and the other end (equivalent to the third end of the second voltage output circuit) is grounded. When the control module outputs the fourth control signal, the relay coil is energized, the relay switch is turned on, thereby turning on the signal pin of the power switch (i.e., point A). Figure 3 Grounding at point A in the middle.

[0077] In the above technical solution, the main power supply module can be turned on by using a second control signal output by the control module after the standby power supply module is turned on. This sequential turn-on method eliminates the need for the user to repeatedly perform the power-on operation, simplifying the user's operation steps and ensuring the reliability of the power-on logic of the power-on control device.

[0078] For example, the power on / off control device further includes a power output circuit; the output terminal of the power output circuit is connected to the second terminal of the second voltage output circuit at the second node, and the potentials of the first node and the second node are equal; the power output circuit is used to output a third target voltage value to the second node when the power switch does not output an on signal or an off signal; wherein the third target voltage value is different from the second target voltage value.

[0079] It can be understood that when the second terminal of the second voltage output circuit is connected to the power switch at the first node, and the output terminal of the power output circuit is connected to the second terminal of the second voltage output circuit at the second node, the output terminal of the power output circuit is connected to the power switch. Since the potentials of the first node and the second node are equal, and as mentioned above, the potentials of the first node and the signal pin are equal, therefore, the potentials of the second node and the signal pin are equal. Thus, when the power output circuit outputs the third target voltage value to the second node, the voltage value of the signal pin is the third target voltage value.

[0080] In this example, the power output circuit can output a third target voltage value, different from the second target voltage value, to the second node when the power switch is not outputting an on or off signal. This creates a difference between the voltage value of the second node when the power switch is not outputting an on or off signal and the voltage value of the second node when the power switch is outputting an on or off signal. Therefore, it is possible to identify a specific signal (first on signal, second on signal, or off signal) based on the change in the voltage value of the second node.

[0081] Optionally, the first target voltage value is different from the third target voltage value.

[0082] Optionally, the first node and the second node can be the same node or different nodes.

[0083] Optionally, the power output circuit can employ any existing or future-developed circuit for voltage conversion. The output voltage of this power output circuit can be set according to actual needs.

[0084] Optionally, the input terminal of the power output circuit is connected to the power supply. In this embodiment, the power output circuit can be directly connected to the power supply, or it can be connected to the power supply through a device such as a voltage regulator module.

[0085] Optionally, the power-on / off control device may also include a voltage divider resistor. Both the second voltage output circuit and the power switch are connected to the output terminal of the power output circuit via this voltage divider resistor.

[0086] by Figure 3 The power output circuit will be explained using an example. Figure 3As shown, both the first and second nodes are point C in the diagram. The output terminal of the power output circuit is connected to the first terminal of the voltage divider resistor R2, and the second terminal of the voltage divider resistor R2 is connected to the second terminal of the second voltage output circuit and the power switch at point C. When SW1 is not pressed and the second voltage output circuit is not turned on, the voltage at point C is equal to the output voltage of the power output circuit. Since points A and C have the same potential, the voltage at point A is also equal to the output voltage of the power output circuit. When SW1 is pressed or the second voltage output circuit is turned on, the voltage at point C is 0, and the voltage at point A is also 0. Therefore, the change in the voltage at point A can be used to determine whether the signal output by the power switch is a specific signal (first on signal, second on signal, or off signal).

[0087] In the above technical solution, by setting up a power output circuit, the signal pins of the power switch can have different voltage states in different states. This helps to distinguish the different signals output by the power switch, thereby avoiding power-on / off logic confusion caused by signal recognition confusion.

[0088] For example, the second input terminal of the power-on / off detection circuit is connected to the battery to sample the actual voltage value output by the battery; the power-on / off detection circuit is also used to send a first power-off signal to the standby power supply module when the actual voltage value is lower than the voltage threshold, so as to control the standby power supply module to turn off.

[0089] Optionally, the second input terminal of the power-on / off detection circuit can be directly connected to the battery or indirectly connected to the battery. For example, the second input terminal of the power-on / off detection circuit can be connected to the battery through a voltage regulator module.

[0090] Optionally, the voltage threshold can be set as needed. For example, the voltage threshold can be in the range of [0.4, 1]V. In one specific embodiment, the voltage threshold is 0.6V. In this embodiment, when the actual voltage value is lower than 0.6V, the power-on / off detection circuit sends a first power-off signal to the standby power supply module.

[0091] Still with Figure 3 The technical solution of this example will be explained using an example. Figure 3 As shown, the second input terminal of the power-on / off detection circuit is connected to the battery. The second input terminal of the power-on / off detection circuit samples the actual battery voltage value. When the actual battery voltage value is lower than the voltage threshold, a first power-off signal can be sent to the standby power supply module to control the standby power supply module to shut down. This prevents over-discharge of the battery when its power is low.

[0092] In the above technical solution, when the power source is a battery, the actual battery voltage can be detected by the power-on / off detection circuit, and the standby power supply module can be shut down when the actual voltage is lower than the voltage threshold. This helps to prevent battery over-discharge, thereby helping to improve battery life.

[0093] According to another aspect of this application, a power management system is provided. This power management system includes the power on / off control device and power supply control device described in any of the above embodiments.

[0094] Figure 4 A schematic block diagram of a power management system according to one embodiment of this application is shown. Figure 4 As shown, the power supply control device includes a standby power supply module, a control module, a power switch, a motherboard detection circuit, and a power output circuit. The power on / off control device includes a power on / off detection circuit. The power switch is a power on / off button. The standby power supply module is a 5VSB, and the control module is a power board MCU. The power output circuit is a low-dropout linear regulator (LDO) circuit with an output voltage of 3.3V. This power output circuit is connected to the power supply via the power line VBUS. The power board MCU can use a first control signal to control the power on / off detection circuit to shut down the 5VSB, thereby achieving power-off control of the 5VSB. The power on / off detection circuit can control the 5VSB to turn on or off by sending an enable signal (power-on signal or first power-off signal) to the 5VSB. The specific working principles of each circuit and module have been described in detail above and will not be repeated here.

[0095] According to another aspect of this application, an electronic device is provided, which includes the power management system described above.

[0096] Optionally, the electronic device can be any existing or future-developed electronic device that uses signals from a control module to control its power on and off. For example, the electronic device can be a laptop, a PDA, an ultrasound device, etc.

[0097] For example, the electronic device is an ultrasonic device.

[0098] Figure 5 A schematic block diagram of an electronic device according to one embodiment of this application is shown. In this embodiment, the electronic device is an ultrasonic device. Figure 5As shown, the mains power is transformed by a 24V transformer module and then supplied to the main power supply module and standby power supply module via the VBUS power line. The battery is also supplied to the main power supply module and standby power supply module via VBUS. The main power supply module includes multiple 12V modules (12V1, 12V2, 12V3) to power the circuits on the main board of the ultrasound equipment and the ultrasound front end. The standby power supply module is a 5VSB module. In this embodiment, when the ultrasound equipment is powered off, the user can press the power button to cause the power switch to output a first control signal. When the power switch outputs the first control signal, the control module on the main board sends a high level PS_ON to the main power supply module to power off the main power supply module. At the same time, the control circuit (i.e., the power-on / off detection circuit) outputs a first power-off signal to the 5VSB to control the 5VSB to turn off. The specific control logic has been described in detail above and will not be repeated here.

[0099] Those skilled in the art can understand the specific implementation scheme of the above power management system and electronic equipment by reading the above description of the power on / off control device, and for the sake of brevity, it will not be described in detail here.

[0100] Although exemplary embodiments have been described herein with reference to the accompanying drawings, it should be understood that the above exemplary embodiments are merely illustrative and are not intended to limit the scope of this application. Various changes and modifications can be made therein by those skilled in the art without departing from the scope and spirit of this application. All such changes and modifications are intended to be included within the scope of this application as claimed in the appended claims.

[0101] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0102] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another device, or some features may be ignored or not executed.

[0103] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of this application may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0104] Similarly, it should be understood that, in order to streamline this application and aid in understanding one or more of the various inventive aspects, features of this application may sometimes be grouped together in a single embodiment, figure, or description thereof in the description of exemplary embodiments of this application. However, this approach should not be construed as reflecting an intention that the claimed application requires more features than are expressly recited in each claim. Rather, as reflected in the corresponding claims, its inventive point lies in solving the corresponding technical problem with features fewer than all features of a single disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into that detailed description, wherein each claim itself is a separate embodiment of this application.

[0105] Those skilled in the art will understand that, apart from the mutual exclusion of features, all features disclosed in this specification (including the accompanying claims, abstract, and drawings) and all processes or units of any method or apparatus so disclosed can be combined in any combination. Unless otherwise expressly stated, each feature disclosed in this specification (including the accompanying claims, abstract, and drawings) may be replaced by an alternative feature that serves the same, equivalent, or similar purpose.

[0106] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features but not others included in other embodiments, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, in the claims, any one of the claimed embodiments can be used in any combination.

[0107] It should be noted that the above embodiments are illustrative of this application and not limiting of it, and that those skilled in the art can devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses should not be construed as limiting the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. This application can be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third, etc., does not indicate any order. These words can be interpreted as names.

[0108] The above description is merely a specific embodiment or illustration of the embodiments of this application. The scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. The scope of protection of this application shall be determined by the scope of the claims.

Claims

1. A power on / off control device for a power supply control device, the power supply control device comprising a standby power supply module and a control module; characterized in that, The power-on / off control device includes a power-on / off detection circuit. The first input terminal of the power-on / off detection circuit is connected to the control module, and the output terminal of the power-on / off detection circuit is connected to the standby power supply module. When the control module outputs a first control signal, the power-on / off detection circuit sends a first power-off signal to the standby power supply module to control the standby power supply module to turn off.

2. The power on / off control device according to claim 1, characterized in that, The power supply control device further includes a power switch; the control module is connected to the power switch, and the control module is used to output the first control signal when the signal output by the power switch is an off signal.

3. The power on / off control device according to claim 2, characterized in that, The shutdown signal includes a normal shutdown signal; the power supply control device also includes a main power supply module, a motherboard detection circuit, and a motherboard processor; the input terminal of the motherboard detection circuit is connected to the power switch, and the output terminal of the motherboard detection circuit, the input terminal of the main power supply module, and the input terminal of the control module are respectively connected to the motherboard processor; The standby power supply module is connected to the motherboard detection circuit to supply power to the motherboard detection circuit; The motherboard detection circuit is used to send a first shutdown detection signal to the motherboard processor when the signal output by the power switch is the normal shutdown signal. After receiving the first shutdown detection signal, the motherboard processor, in response to a received user shutdown command, sends a second shutdown signal to the main power supply module to control the main power supply module to shut down and sends a shutdown command to the control module. Specifically, the control module is used to output the first control signal when it receives the shutdown command and detects that the motherboard processor outputs the second shutdown signal.

4. The power on / off control device according to claim 2, characterized in that, The shutdown signal includes a timeout shutdown signal; the power on / off control device further includes a sampling circuit; the sampling circuit is connected in series between the control module and the power switch; The sampling circuit is used to output a sampling signal to the control module when the signal output by the power switch is the timeout shutdown signal; The control module is used to output the first control signal when it receives the sampling signal.

5. The power on / off control device according to claim 4, characterized in that, The power supply control device also includes a main power supply module, a motherboard detection circuit, and a motherboard processor; the input terminal of the motherboard detection circuit is connected to the power switch, and the output terminal of the motherboard detection circuit, the input terminal of the main power supply module, and the input terminal of the control module are respectively connected to the motherboard processor. The standby power supply module is connected to the motherboard detection circuit to supply power to the motherboard detection circuit; The motherboard detection circuit is used to send a second shutdown detection signal to the motherboard processor when the signal output by the power switch is the timeout shutdown signal. The motherboard processor is used to send a second shutdown signal to the main power supply module after receiving the second shutdown detection signal to control the main power supply module to shut down. Specifically, the control module is used to output the first control signal when it receives the sampling signal and detects that the motherboard processor outputs the second shutdown signal.

6. The power on / off control device according to any one of claims 1-5, characterized in that, The power-on / off control device further includes a first voltage output circuit; the output terminal of the first voltage output circuit is connected to the first input terminal of the power-on / off detection circuit, and the input terminal of the first voltage output circuit is used to connect to the output terminal of the control module; the first voltage output circuit is used to receive the first control signal output by the control module, generate a first target voltage value based on the first control signal, and output the first target voltage value to the power-on / off detection circuit. The power-on / off detection circuit is used to send the first power-off signal to the standby power supply module when it receives the first target voltage value.

7. The power on / off control device according to any one of claims 1-5, characterized in that, The power supply control device further includes a power switch; the power on / off detection circuit is also connected to the power switch; the power on / off detection circuit is used to detect the signal output by the power switch, and when the signal output by the power switch is a first on signal, it sends a power-on signal to the standby power supply module to control the standby power supply module to turn on.

8. The power on / off control device according to claim 7, characterized in that, The power supply control device also includes a main power supply module, a motherboard detection circuit, and a motherboard processor; the input terminal of the motherboard detection circuit is connected to the power switch, and the output terminal of the motherboard detection circuit and the input terminal of the main power supply module are respectively connected to the motherboard processor. The control module is connected to the standby power supply module; the standby power supply module is connected to the motherboard detection circuit to supply power to the motherboard detection circuit; the power on / off control device further includes a second voltage output circuit; the first terminal of the second voltage output circuit is used to connect to the control module, and the second terminal of the second voltage output circuit is used to connect to the power switch at the first node; The control module is used to send a second control signal to the second voltage output circuit after the standby power supply module is turned on; The second voltage output circuit is used to adjust the voltage on the first node to a second target voltage value via the second terminal when the second control signal is received via the first terminal, so that the power switch outputs a second turn-on signal; The motherboard detection circuit is used to detect the signal output by the power switch, and when it detects that the signal output by the power switch is the second power-on signal, it sends a power-on detection signal to the motherboard processor. After receiving the power-on detection signal, the motherboard processor sends a third control signal to the main power supply module to control the main power supply module to power on.

9. The power on / off control device according to claim 8, characterized in that, The power on / off control device further includes a power output circuit; the output terminal of the power output circuit is connected to the second terminal of the second voltage output circuit at the second node, and the potentials of the first node and the second node are equal. The power output circuit is used to output a third target voltage value to the second node when the power switch does not output an on signal or an off signal, wherein the third target voltage value is different from the second target voltage value.

10. The power on / off control device according to any one of claims 1-5, characterized in that, The second input terminal of the power-on / off detection circuit is connected to the battery to sample the actual voltage value output by the battery; the power-on / off detection circuit is also used to send a first power-off signal to the standby power supply module when the actual voltage value is lower than the voltage threshold, so as to control the standby power supply module to turn off.

11. A power management system, characterized in that, It includes the power on / off control device and the power supply control device as described in any one of claims 1-10.

12. An electronic device, characterized in that, Includes the power management system as described in claim 11.

13. The electronic device according to claim 12, characterized in that, The electronic device is an ultrasonic device.

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