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

Abstract

The embodiment of the utility model 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 technical field of on - off control, and more particularly to an on - off control device, a power management system, and an electronic device. Background Art

[0002] In electronic devices such as ultrasonic devices and laptop computers, it is necessary to control the on - off of the electronic device.

[0003] In the related art, after an electronic device such as an ultrasonic device or a laptop computer is shut down, there is still a part of the circuit that can work in standby mode inside the electronic device and remains in the working state. Thus, unnecessary energy consumption is generated. Summary of the Utility Model

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

[0005] According to one aspect of this application, there is provided an on - off control device for a power supply control device. The power supply control device includes a standby power supply module and a control module; the on - off control device includes an on - off detection circuit. The first input end of the on - off detection circuit is used to be connected to the control module, and the output end of the on - off detection circuit is used to be connected to the standby power supply module; the on - off detection circuit is used to send a first shutdown 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] Exemplarily, 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 a first control signal when the signal output by the power switch is a shutdown signal.

[0007] Exemplarily, the shutdown signal includes a normal shutdown signal; the power supply control device further includes a main power supply module, a main board detection circuit, and a main board processor; the input end of the main board detection circuit is connected to the power switch, and the output end of the main board detection circuit, the input end of the main power supply module, and the input end of the control module are respectively connected to the main board processor; the standby power supply module is connected to the main board detection circuit to supply power to the main board detection circuit; the main board detection circuit is used to send a first shutdown detection signal to the main board processor when the signal output by the power switch is a normal shutdown signal, and the main board processor is used to send a second shutdown signal to the main power supply module to control the main power supply module to turn off and send a shutdown instruction 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 receiving the shutdown instruction and detecting that the main board processor outputs a second shutdown signal.

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

[0009] Exemplarily, the power supply control device further includes a main power supply module, a main board detection circuit, and a main board processor; the input end of the main board detection circuit is connected to the power switch, and the output end of the main board detection circuit, the input end of the main power supply module, and the input end of the control module are respectively connected to the main board processor; the standby power supply module is connected to the main board detection circuit to supply power to the main board detection circuit; the main board detection circuit is configured to send a second shutdown detection signal to the main board processor when the signal output by the power switch is a timeout shutdown signal, and the main board processor is configured 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 configured to output a first control signal when receiving the sampling signal and detecting that the main board processor outputs a second shutdown signal.

[0010] Exemplarily, the power on / off control device further includes a first voltage output circuit; the output end of the first voltage output circuit is connected to the first input end of the power on / off detection circuit, and the input end of the first voltage output circuit is used to be connected to the output end of the control module; the first voltage output circuit is configured 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 configured to send a first shutdown signal to the standby power supply module when receiving the first target voltage value.

[0011] Exemplarily, the power supply control device further includes a power switch; the power on / off detection circuit is further configured to be connected to the power switch; the power on / off detection circuit is configured to detect the signal output by the power switch, and when the signal output by the power switch is a first startup signal, send a startup signal to the standby power supply module to control the standby power supply module to start up.

[0012] Exemplarily, the power supply control device further includes a main power supply module, a main board detection circuit, and a main board processor; the input end of the main board detection circuit is connected to the power switch, and the output end of the main board detection circuit and the input end of the main power supply module are respectively connected to the main board processor; the control module is connected to the standby power supply module; the standby power supply module is connected to the main board detection circuit to supply power to the main board detection circuit; the power-on / off control device further includes a second voltage output circuit; the first end of the second voltage output circuit is used to be connected to the control module, and the second end of the second voltage output circuit is used to be connected to the power switch at a 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 end to make the power switch output a second turn-on signal when receiving the second control signal via the first end; the main board detection circuit is used to detect the signal output by the power switch, and send a turn-on detection signal to the main board processor when detecting that the signal output by the power switch is the second turn-on signal, and the main board 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.

[0013] Exemplarily, the power-on / off control device further includes a power output circuit; the output end of the power output circuit is connected to the second end of the second voltage output circuit at a second node, and the electric potential of the first node is equal to that of the second node; the power output circuit is used to output a third target voltage value to the second node when the power switch does not output a turn-on signal and a turn-off signal, wherein the third target voltage value is different from the second target voltage value.

[0014] Exemplarily, the second input end 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 further used to send a first shutdown signal to the standby power supply module to control the standby power supply module to turn off when the actual voltage value is lower than the voltage threshold.

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

[0016] According to still another aspect of the present application, an electronic device is provided, including the above-mentioned power management system.

[0017] Exemplarily, the electronic device is an ultrasonic device.

[0018] According to the above technical solution, when the control module outputs the first control signal, the power-on / off detection circuit can send a first shutdown signal to the standby power supply module to control the standby power supply module to turn off. Thus, in this technical solution, when the electronic device shuts down, the standby power supply module can be turned off by using the first control signal, thereby avoiding unnecessary energy consumption. In an application scenario where a battery is used as the power source, this solution can help improve the battery power retention time after the electronic device shuts down, reduce the battery power consumption, and thus help reduce the usage cost of the electronic device.

[0019] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the specific embodiments of the present application are given below. Brief Description of the Drawings

[0020] By describing the embodiments of the present application in more detail in conjunction with the drawings, the above and other purposes, features and advantages of the present application will become more obvious. The drawings are used to provide a further understanding of the embodiments of the present application, and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation to the present application. In the drawings, the same reference numerals generally represent the same components or steps.

[0021] Figure 1 A schematic diagram showing an ultrasonic device according to an embodiment in the related art;

[0022] Figure 2 A schematic diagram showing a power management system according to an embodiment of the present application;

[0023] Figure 3 A circuit schematic diagram showing a power-on / off control device according to a specific embodiment of the present application;

[0024] Figure 4 A schematic block diagram showing a power management system according to an embodiment of the present application;

[0025] Figure 5 A schematic block diagram showing an electronic device according to an embodiment of the present application. Detailed Description of the Embodiments

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

[0027] In electronic devices such as ultrasonic devices and laptop computers, it is necessary to control the power on and off of the electronic devices. The following mainly takes the power management system of an ultrasonic device as an example for illustration. Figure 1 A schematic diagram of an ultrasonic device according to an embodiment in the related art is shown. In this embodiment, the ultrasonic device includes a main power supply module and a standby power supply module. As Figure 1 shown, the mains power is transformed by a 24V voltage transformation module and then supplies power to the main power supply module and the standby power supply module via the power line VBUS. The battery supplies power to the main power supply module and the standby power supply module via VBUS. The main power supply module may include a plurality of 12V modules (12V1, 12V2, 12V3) for supplying power to the circuits on the main board of the ultrasonic device and the ultrasonic front end, etc. The standby power supply module is a 5VSB module, and this 5VSB module can supply power to a small number of circuits on the main board (for example, the main board detection circuit on the main board for detecting whether the power on / off button is pressed).

[0028] In Figure 1 the shown embodiment, after the ultrasonic device is powered on (for example, connected to the mains power or the battery power), 5VSB will output a voltage to enable a small number of circuits on the main board of the ultrasonic device to work. When the ultrasonic device is powered on, the user can press the power on / off button to enable the ultrasonic device to enter the power-on process. This power-on process includes: the main board end of the ultrasonic device will output a low level of PS_ON to the main power supply module, and the main power supply module will be turned on after receiving this low-level signal. When the main power supply module is normally turned on, it will generate a PGOOD signal and send it to the main board end. After the main board end receives the PGOOD signal, it can determine that the main power supply module is normally outputting power. At this time, the power supply of each circuit on the main board will be successively turned on, so that the ultrasonic device can be normally started. When the ultrasonic device is powered off, the main board end outputs a high level of PS_ON. After this high-level signal is sent to the main power supply module, the main power supply module is turned off, and the ultrasonic device is powered off. In the above embodiment, the energy consumption of the electronic device after power-off is described by taking the ultrasonic device as an example. It can be understood that the electronic device is not limited to the ultrasonic device, and the above embodiment is not a limitation on the electronic devices in the present application. The electronic device can also be, for example, any device such as a laptop computer that can use the standby power supply module to supply power to at least some circuits on the main board after power-off.

[0029] As described above, after the ultrasound device is powered off, 5VSB is still powered, and a small part of the circuits on the main board (such as the main board detection circuit) are in working state. Thereby, unnecessary energy consumption is generated, which affects the user experience. Especially in the application scenario where the battery is used as the power source, the storage time of the battery power will be reduced. In some embodiments of the related art, the energy consumption is reduced by reducing the number of circuits connected to 5VSB. However, this method still has circuit power consumption, and the power supplies 5VSB, and 5VSB supplies power to the main board, and there are two levels of power conversion between them, which will also cause losses. For this reason, the present application provides a power-on / off control device, a power management system and an electronic device. This device can reduce the energy consumption after the device is powered off. The power-on / off control device, the power management system and the electronic device will be described in detail below.

[0030] According to one aspect of the present application, a power-on / off control device is provided. This power-on / off control device is used for a power supply control device, and the power supply control device includes a standby power supply module and a control module; the power-on / off control device includes a power-on / off detection circuit, the first input end of the power-on / off detection circuit is used to be connected to the control module, and the output end of the power-on / off detection circuit is used to be 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.

[0031] For ease of description, first, the structure of the power management system will be introduced. Figure 2 The schematic diagram of the power management system according to an embodiment of the present application is shown. As Figure 2 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 end of the power-on / off detection circuit 211 is connected to the control module 221, and the output end of the power-on / off detection circuit 211 is used to be 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 for supplying power to at least part of the standby working circuits on the main board of the electronic device 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 processor device with data processing capabilities and / or instruction execution capabilities. For example, the control module may be implemented using one or a combination of several forms such as a programmable logic control module (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 micro control unit (MCU), and other forms of processing units.

[0034] Optionally, the power on / off detection circuit may include any existing or future developed monitoring chip that can at least be used to monitor a specific signal and send a first shutdown signal to the power supply module (such as the standby power supply module) according to the specific signal. The 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 types and connection methods of the specific electronic components can be set as needed and will not be elaborated.

[0035] Optionally, the control module may output a first control signal in response to a user's shutdown control operation. The shutdown control operation may be an operation where the user clicks a virtual button (such as the "shutdown" button) on the display interface of the electronic device, or an operation where the user clicks a physical button (such as Figure 1 the power on / off button in []. In some embodiments, when the user clicks the power on / off button, a pop-up window may be displayed on the display interface of the electronic device, prompting options such as shutdown, standby, restart, and cancel. When the user selects shutdown, the control module outputs the first control signal. In this embodiment, the shutdown control operation may be an operation where the user clicks the power on / off button and selects the shutdown option on the display interface.

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

[0037] Optionally, the first shutdown signal may be a level signal or a specific voltage value. In a specific embodiment, the first shutdown signal may be a low level signal. In this embodiment, the power on / off detection circuit may 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 may be directly or indirectly connected to the power-on / off detection circuit. In some embodiments, the control module may be directly connected to the first input terminal of the power-on / off detection circuit. In this case, the control module may directly output the first control signal to the power-on / off detection circuit. The power-on / off detection circuit may send the first shutdown signal when receiving the first control signal. In other embodiments, the control module may be indirectly connected to the power-on / off detection circuit. In other words, other circuits may be serially arranged between the control module and the power-on / off detection circuit, such as a voltage output circuit (such as the first voltage output circuit described below). In this case, the control module may output the first control signal to the voltage output circuit. The voltage output circuit may 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 may send the first shutdown signal after receiving the specific voltage value or the specific signal output by the voltage output circuit.

[0039] Optionally, the power supply control device may further include a main power supply module, a main board detection circuit, and a main board processor. The input end of the main board detection circuit is connected to the power switch, and the output end of the main board detection circuit, the input end of the main power supply module, and the input end of the control module are respectively connected to the main board processor; the standby power supply module is connected to the main board detection circuit to supply power to the main board detection circuit. The main board (or the main board end) of the electronic device may include a main board detection circuit and a main board processor. The main board detection circuit and the main board processor may be integrated on the same circuit board or separately arranged on different circuit boards. The main board processor may include any suitable processor device with data processing capabilities and / or instruction execution capabilities. For example, the main board processor may be implemented by using one or a combination of several of a programmable logic control module (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 micro control unit (MCU), and other forms of processing units. The main board processor can be regarded as the core processor of the electronic device, and it can be used to control most of the circuits, components, or assemblies on the electronic device. The main board detection circuit can be used to send a corresponding shutdown detection signal to the main board processor when the user normally presses (short presses) the power on / off button and inputs a shutdown command (see the embodiment where the power switch outputs a normal shutdown signal described below) or when the user long presses the power on / off button (see the embodiment where the power switch outputs a timeout shutdown signal described below). The main board processor can send a second shutdown signal to the main power supply module to control the main power supply module to shut down when receiving the shutdown detection signal. The control module can output a first control signal after the main power supply module shuts down. For easy 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 main board processor to the main power supply module can be called the second shutdown signal. The signal form of the second shutdown signal may be similar to that of the first shutdown signal, which will not be elaborated here. In the above optional embodiment, the operation of the power on / off detection circuit sending the first shutdown signal is executed after the main power supply module shuts down. In the solution of this embodiment, when shutting down, the main board 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 sends the first shutdown signal. In other words, the main power supply module and the standby power supply module can be shut down in sequence. It can be understood that the standby power supply module can supply power to the main board detection circuit. By making the standby power supply module shut down after the main power supply module, it can be avoided that the standby power supply module shuts down prematurely, resulting in the main board detection circuit being unable to output the shutdown detection signal and further causing the main board processor to be unable to output the second shutdown signal. This solution helps to improve the reliability of power on / off control.

[0040] As described above, in the related art, after the ultrasound device is powered off, 5VSB is still powered, and a small part of the circuit on the main board (such as the main board detection circuit) is in a working state. Thus, unnecessary energy consumption is generated, affecting the user experience. In the above technical solution, the power-on / off detection circuit can send a first shutdown 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. Thus, in this technical solution, the standby power supply module can be turned off by using the first control signal when the electronic device is powered off, thereby avoiding unnecessary energy consumption. In an application scenario using a battery as a power source, this solution can help improve the battery power retention time after the electronic device is powered off, reduce the battery power consumption, and thus help reduce the usage cost of the electronic device.

[0041] Exemplarily, the power supply control device further includes a power switch; the control module is connected to the power switch, and the control module is configured to output a first control signal when the signal output by the power switch is a shutdown signal.

[0042] Optionally, the power switch can adopt 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 for connecting to the control module (which can be simply referred to as the signal pin), or the 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 and a timeout shutdown signal. The normal shutdown signal can be used to achieve the normal shutdown of the electronic device, that is, non-forced shutdown. The timeout shutdown signal can be used to achieve the 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. After the user selects shutdown (that is, the main board of the electronic device receives the user shutdown command), the electronic device then starts the shutdown process to turn off 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 main board of the electronic device can monitor the output signal of the power switch. When it detects that the power switch outputs a timeout shutdown signal, the electronic device can automatically start the shutdown process to turn off 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 as signals with different durations. Optionally, when the signal output by the power switch is the voltage value of the signal pin, it can be determined that the power switch outputs a normal shutdown signal when the voltage value of the signal pin falls within the first preset voltage range and the duration of falling within this range does not exceed the first preset duration, and it can be determined that the power switch outputs a timeout shutdown signal when the duration of the voltage value of the signal pin continuously staying within the first preset voltage range exceeds the first preset duration. Optionally, the first preset duration can be set as needed. For example, the first preset duration can be in the range of [3, 8] seconds (s). Specifically, for example, 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 continuously staying within the first preset voltage range does not exceed 4s, it can be determined that the power switch outputs a normal shutdown signal, and when the duration of the voltage value of the signal pin continuously staying within the first preset voltage range exceeds 4s, it can be determined that the power switch outputs a timeout shutdown signal.

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

[0045] In some embodiments, the power switch can include a push-button switch. In this embodiment, the user can control the power switch to output a shutdown signal by controlling the push-button switch, thereby controlling the shutdown of the standby power supply module. In a specific embodiment, when the duration of the user pressing the push-button switch exceeds 4s, the power switch outputs a shutdown signal.

[0046] Optionally, the control module can be directly connected to the power switch. In this embodiment, the control module can directly receive the shutdown 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. The specific circuit can be the sampling circuit or the motherboard detection circuit described below. The specific solution is described in detail below and will not be elaborated here.

[0047] In the solution of this example, the shutdown signal can be output by controlling the power switch, thereby controlling the shutdown of the standby power supply module. This solution can facilitate the user's control of the device shutdown, and this method of forcibly shutting down the device using the power switch can reduce the problem of unreliable power on and off caused by abnormal device software. In short, this solution helps to improve the reliability of power on and off control.

[0048] Exemplarily, 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 end of the motherboard detection circuit is connected to the power switch, and the output end of the motherboard detection circuit, the input end of the main power supply module, and the input end 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 configured to send a first shutdown detection signal to the motherboard processor when the signal output by the power switch is a normal shutdown signal, and the motherboard processor is configured 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 instruction to the control module in response to the received user shutdown command after receiving the first shutdown detection signal; wherein, the control module is specifically configured to output a first control signal when receiving the shutdown instruction and detecting that the motherboard processor outputs the second shutdown signal.

[0049] As described above, the user can short-press the power switch to make the power switch 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 display interface of the electronic device to display a pop-up window, prompting options such as shutdown, standby, restart, and cancel. When the user selects shutdown (i.e., inputs a user shutdown command), the electronic device can enter the normal shutdown process. Exemplarily, in response to the user input of the user shutdown command, the motherboard processor of the electronic device can send a second shutdown signal (such as a PS_ON high-level signal) to the main power supply module to turn off the main power supply module (i.e., the 12V module). At the same time, the motherboard processor can also send a shutdown instruction to the control module. After receiving the shutdown instruction, the control module can continue to wait until it detects that the main power supply module is turned off (such as detecting that PS_ON is a high-level signal), and then output a first control signal to turn off the standby power supply module.

[0050] By adopting the above embodiments, through the coordinated operation of the main board detection circuit, the main board processor, and the control module, it is possible to sequentially turn off the main power supply module and the standby power supply module during the normal shutdown process. Since the normal shutdown process is the more common shutdown process on electronic devices, the application scenario of turning off the standby power supply module in this process is relatively extensive, which can help electronic devices better save energy consumption.

[0051] Exemplarily, the shutdown signal includes a timeout shutdown signal; the power-on / off control device further includes a sampling circuit; the sampling circuit is used to be 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 receiving the sampling signal.

[0052] Optionally, the sampling circuit can be any existing or future-developed circuit that can collect the signal output by the power switch and output a sampling signal according to this signal. For example, the sampling circuit can 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. The control module is used to be connected to the sampling point. Among them, the sampling point is located between the first resistor and the diode. Exemplarily, the timeout shutdown signal is used to indicate that the duration for which the voltage value of the signal pin of the power switch continuously remains within a first preset voltage range exceeds 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 a first voltage value. The first voltage value can be determined according to the structure of the sampling circuit and the actual working conditions. In this embodiment, the sampling signal is used to indicate that the duration for which the voltage value of the sampling point remains at the first voltage value exceeds the first preset duration. It can be 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 voltage regulator diode.

[0053] Figure 3 The circuit schematic diagram of the power-on / off control device according to a specific embodiment of the present application is shown. In this embodiment, when the duration for which the voltage value of the signal pin continuously remains within [0, 1] V exceeds 4 s, it is determined that the power switch outputs a timeout shutdown signal. As Figure 3As shown, the power switch includes a switch button SW1. One end of SW1 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 the diode D1 is connected to the second end of the sampling resistor R1, and the second end of the diode D1 is connected to the power switch. The first end of the 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 regarded 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 the diode D1. The sampling signal is Force_ONOFF. When the switch button SW1 is pressed, the voltage value at point A is 0, and at this time, the voltage value at point B is the voltage drop of the diode D1. When the duration of continuously pressing the switch button SW1 exceeds 4 s, the duration of the voltage value at the signal pin remaining within [0, 1] V exceeds 4 s. In this case, the voltage value at point B is always equal to the voltage drop of the diode D1 during the continuous pressing of the switch button SW1. In other words, at this time, the sampling circuit can generate the sampling signal Force_ONOFF.

[0054] Through the above technical solution, by setting a sampling circuit connected in series between the control module and the power switch, the timeout shutdown signal can be detected more accurately, which helps to improve the reliability of the shutdown control. At the same time, this method of indirectly connecting the power switch through the sampling circuit can prevent the impedance of the control module itself from interfering with the timeout shutdown signal, which helps to improve the overall reliability of the power-on / off control device.

[0055] Exemplarily, the power supply control device further includes a main power supply module, a main board detection circuit, and a main board processor; the input end of the main board detection circuit is connected to the power switch, and the output end of the main board detection circuit, the input end of the main power supply module, and the input end of the control module are respectively connected to the main board processor; the standby power supply module is connected to the main board detection circuit to supply power to the main board detection circuit; the main board detection circuit is used to send a second shutdown detection signal to the main board processor when the signal output by the power switch is a timeout shutdown signal, and the main board 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 receiving the sampling signal and detecting that the main board processor outputs a second shutdown signal.

[0056] In some specific implementation solutions of this example, the main board detection circuit can monitor the signal output by the power switch. When the user selects to long-press the power switch (about 4S) to perform forced shutdown, the main board detection circuit can detect the timeout shutdown signal output by the power switch. At this time, the main board detection circuit can send a second shutdown detection signal to the main board processor. After receiving the second shutdown detection signal, the main board processor can send a second shutdown signal (such as a PS_ON high-level signal) to the main power supply module to turn off the main power supply module (i.e., the 12V module). Since there is no user shutdown command 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 main board detection circuit. After the control module detects the generation of the timeout shutdown signal through the sampling circuit, it can simultaneously determine whether the second shutdown signal is generated (such as judging the level of PS_ON). When the control module determines that the second shutdown signal is generated, that is, when it determines that the main power supply module is turned off, the control module can output a first control signal to turn off the standby power supply module. Thus, the main power supply module and the standby power supply module can be turned off in sequence.

[0057] By adopting the above embodiment, through the coordinated work of the main board detection circuit, the main board processor and the control module, it is possible to turn off the main power supply module and the standby power supply module successively under the forced shutdown process. In this way, even if forced shutdown occurs, it can be ensured that the standby power supply module can be successfully turned off, thereby helping the electronic device to better save energy consumption.

[0058] Exemplarily, the power-on / off control device further includes a first voltage output circuit; the output end of the first voltage output circuit is connected to the first input end of the power-on / off detection circuit, and the input end of the first voltage output circuit is used to be connected to the output end of the control module; the first voltage output circuit is configured 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 configured to send a first shutdown signal to the standby power supply module when receiving the first target voltage value.

[0059] Optionally, the first voltage output circuit can be composed of any one or several existing or future-developed electronic components. The electronic components include but are not limited to metal-oxide semiconductor field effect transistors (MOS), triodes, resistors, etc. The present application does not limit the specific structure of the first voltage output circuit, as long as the first voltage output circuit can generate a specific voltage value and output the voltage value when receiving the first control signal.

[0060] In some embodiments, the first voltage output circuit may include a MOS transistor. The MOS transistor may be a PMOS or an NMOS. The output terminal of the control module is connected to the gate of the MOS transistor. The source of the MOS transistor is grounded, and the drain of the MOS transistor is connected to the first input terminal of the power-on / off detection circuit. The first control signal may be used to control the MOS transistor to conduct. The first target voltage value is 0. In this embodiment, when the control module outputs the first control signal, the MOS transistor conducts, and at this time, 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 may send a first shutdown signal to the standby power supply module. The circuit structure of the first voltage output circuit is only an example, and the first voltage output circuit may also adopt other circuit structures. For example, the first voltage output circuit may include a triode. The triode may be a PNP-type triode or an NPN-type triode. The base of the triode is connected to the output terminal of the control module. The emitter of the triode is grounded, and the collector of the triode is connected to the first input terminal of the power-on / off detection circuit. The first control signal may be used to control the triode to conduct. 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 triode conducts, and at this time, the voltage value input to the first input terminal of the power-on / off detection circuit is 0. In this case, the power-on / off detection circuit may send a first shutdown signal to the standby power supply module.

[0061] Take Figure 3 as an example to illustrate the first voltage output circuit. As Figure 3 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 the first voltage output circuit receives the first control signal KILL output by the control module, it may 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 may send a first shutdown signal to the standby power supply module 5VSB to turn off 5VSB.

[0062] In the above technical solution, the first voltage output circuit may generate a first target voltage value when receiving the first control signal and output the first target voltage value to the power-on / off detection circuit, so that the power-on / off detection circuit sends a first shutdown signal to the standby power supply module. This solution has a simple circuit structure and helps to improve the reliability of the shutdown control of the power-on / off control device.

[0063] Exemplarily, the power supply control device further includes a power switch; the power-on / off detection circuit is further configured to be connected to the power switch; the power-on / off detection circuit is configured to detect the signal output by the power switch, and when the signal output by the power switch is a first turn-on signal, send 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 the voltage value of the signal pin, it can be determined that the power switch outputs a first turn-on signal when the duration for which the voltage value of the signal pin continuously remains within a second preset voltage range exceeds a third preset duration. Optionally, the third preset duration can be set as needed. For example, the third preset duration can be in 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 and the second preset voltage range is [0, 1] V. In this embodiment, when the duration for which the voltage value of the signal pin continuously remains within the second preset voltage range exceeds 128 ms, it can be determined that the power switch outputs a first turn-on signal.

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

[0066] In the above embodiment where the power switch includes a key switch, the user can control the power switch to output a first turn-on signal by controlling the key switch, thereby controlling the turn-on of the standby power supply module. In a specific embodiment, when the duration for which the user presses the key switch exceeds 128 ms, the power switch outputs a first turn-on signal.

[0067] In the solution of this example, the turn-on of the standby power supply module can be controlled by controlling the power switch to output a first turn-on signal. This solution is simple to operate and can facilitate the user to control the power-on of the device.

[0068] Exemplarily, the power supply control device further includes a main power supply module, a main board detection circuit, and a main board processor; the input end of the main board detection circuit is connected to the power switch, and the output end of the main board detection circuit and the input end of the main power supply module are respectively connected to the main board processor; the control module is connected to the standby power supply module; the standby power supply module is connected to the main board detection circuit to supply power to the main board detection circuit; the power-on and power-off control device further includes a second voltage output circuit; the first end of the second voltage output circuit is used to be connected to the control module, and the second end of the second voltage output circuit is used to be connected to the power switch at a first node; the control module is configured 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 configured to adjust the voltage at the first node to a second target voltage value via the second end when receiving the second control signal via the first end so that the power switch outputs a second turn-on signal; the main board detection circuit is configured to detect the signal output by the power switch, and send a turn-on detection signal to the main board processor when detecting that the signal output by the power switch is the second turn-on signal, and the main board processor is configured 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 for supplying power to at least some non-standby working circuits in the electronic device after the electronic device is powered on. Those skilled in the art can understand the difference between the standby power supply module and the main power supply module, which will not be elaborated here.

[0070] In this embodiment, the control module can be connected to the standby power supply module and the main power supply module through a serial port. The standby power supply module being turned on means that the standby power supply module supplies power to the main board detection circuit, the control module, etc. until the main board detection circuit, the control module, etc. complete power-on initialization.

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

[0072] In this article, the second end of the second voltage output circuit is used to be connected to the power switch at a first node. In other words, the second end 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. Thus, when the second voltage output circuit adjusts the voltage at the first node to the second target voltage value via the second end, the voltage value of the signal pin can be the second target voltage value.

[0073] Optionally, when the signal output by the power switch is the voltage value of the signal pin, it is possible to determine that the power switch outputs a second turn-on signal when the duration for which the voltage value of the signal pin continuously falls within the third preset voltage range reaches the fifth preset duration and 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 less 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 solution helps prevent interference between the second turn-on signal and the first turn-on signal, thus helping to avoid switching logic errors.

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

[0075] Take Figure 3 as an example to illustrate the second voltage output circuit. In this embodiment, when the duration for which the voltage value of the signal pin continuously falls within the range of [0,1] V reaches 100 ms, it is determined that the power switch outputs a second turn-on signal. As Figure 3 shown, the input end of the motherboard detection circuit is connected to the power switch. The first end (which can be referred to as the signal input end) P1 of the second voltage output circuit is connected to a control module (not shown in the figure), the second end (which can be referred to as the control end) P2 of the second voltage output circuit is connected to the power switch, and the third end (which can be referred to as the grounding end) P3 of the second voltage output circuit is grounded. The second voltage output circuit can control the conduction or disconnection between the control end and the grounding end according to the signal input at the signal input end. When the second voltage output circuit receives the fourth control signal MCU_BUTTON, the control end and the grounding end of the second voltage output circuit are continuously conducted for 100 ms. When the second voltage output circuit is conducting, the second voltage output circuit 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 at point A remains 0 V for 100 ms. In other words, the power switch outputs a 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 may be composed of any one or several electronic components existing or developed in the future. The electronic components may include, but are not limited to, metal-oxide-semiconductor field effect transistors (MOS), triodes, resistors, relay switches, relay coils, optocoupler switches, etc. In the Figure 3 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 the power switch, and the other end is grounded. The input end of the control element (equivalent to the input end of the second voltage output circuit) is connected to the control module. When the control element receives the fourth control signal, it can control the switching element to conduct, so that the signal pin of the power switch (i.e., Figure 3 point A in) is grounded. The circuit structure of the above second voltage output circuit is only an example and does not limit the circuit structure of the second voltage output circuit. The second voltage output circuit may also adopt other circuit structures. For example, the second voltage output circuit may be a relay. The relay may include a relay coil and a relay switch. The fourth control signal may 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 point) is grounded. When the control module outputs the fourth control signal, the relay coil is energized and the relay switch conducts, so that the signal pin of the power switch (i.e., Figure 3 point A in) is grounded.

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

[0078] Exemplarily, the power-on and off control device further includes a power output circuit; the output end of the power output circuit is connected to the second end of the second voltage output circuit at a second node, and the electric potential of the first node is equal to that of the second node; the power output circuit is configured to output a third target voltage value to the second node when the power switch does not output an on signal and 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 end of the second voltage output circuit is connected to the power switch at the first node, and the output end of the power output circuit is connected to the second end of the second voltage output circuit at the second node, the output end of the power output circuit is connected to the power switch. Since the electric potential of the first node is equal to that of the second node, and as described above, the electric potential of the first node is equal to that of the signal pin, therefore, the electric potential of the second node is equal to that of the signal pin. 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 the solution of 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 does not output an opening signal and a closing signal. In this way, a difference can be made between the voltage value of the second node when the power switch does not output an opening signal and a closing signal and the voltage value of the second node when the power switch outputs an opening signal and a closing signal. Thus, the effect of identifying a specific signal (the first opening signal, the second opening signal or the closing signal) according to the change of the voltage value of the second node can be achieved.

[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 circuit structure of the power output circuit can adopt any existing or future-developed circuit for voltage conversion. The output voltage of the power output circuit can be set according to actual needs.

[0084] Optionally, the input end 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 connected to the power supply through components such as a voltage stabilizing module.

[0085] Optionally, the power-on and power-off control device can further include a voltage-dividing resistor. Both the second voltage output circuit and the power switch are connected to the output end of the power output circuit through the voltage-dividing resistor.

[0086] Take Figure 3 as an example to illustrate the power output circuit. As Figure 3As shown, both the first node and the second node are point C in the figure. The output end of the power supply output circuit is connected to the first end of the voltage-dividing resistor R2, and the second end of the voltage-dividing resistor R2 is connected to the second end 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 conducting, the voltage at point C is equal to the output voltage of the power supply output circuit. Since point A and point C are at the same potential, the voltage at point A is also equal to the output voltage of the power supply output circuit. When SW1 is pressed or the second voltage output circuit conducts, the voltage at point C is equal to 0, and the voltage at point A is also 0. Thus, it is possible to determine whether the signal output by the power switch is a specific signal (the first opening signal, the second opening signal, or the closing signal) based on the change in the voltage at point A.

[0087] In the above technical solution, by setting up the power supply output circuit, the signal pin of the power switch can have different voltage states in different states, thereby facilitating the distinction of different signals output by the power switch, and thus avoiding the confusion of the power-on and power-off logic caused by signal recognition chaos.

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

[0089] Optionally, the second input end of the power-on and power-off detection circuit can be directly connected to the battery or indirectly connected to the battery. For example, the second input end of the power-on and power-off detection circuit can be connected to the battery through a voltage stabilization 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 a specific embodiment, the voltage threshold is 0.6 V. In this embodiment, when the actual voltage value is lower than 0.6 V, the power-on and power-off detection circuit sends a first power-off signal to the standby power supply module.

[0091] Still taking Figure 3 as an example to illustrate the technical solution of this example. As Figure 3 shown, the second input end of the power-on and power-off detection circuit is connected to the battery. When the actual voltage value of the battery sampled by the second input end of the power-on and power-off detection circuit. When the actual voltage value of the battery 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 turn off. Thus, over-discharge of the battery can be avoided when the battery power is low.

[0092] In the above technical solution, when the power supply is a battery, the actual voltage value of the battery can be detected by the power-on / off detection circuit, and when the actual voltage value is lower than the voltage threshold, the standby power supply module is controlled to turn off. Thus, it helps to avoid over-discharging of the battery, thereby helping to extend the service life of the battery.

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

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

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

[0096] Optionally, the electronic device can be any existing or future-developed electronic device that controls power-on / off using the signal sent by the control module. For example, the electronic device can be a laptop computer, a palm computer, an ultrasonic device, etc.

[0097] Exemplarily, the electronic device is an ultrasonic device.

[0098] Figure 5 FIG. shows a schematic block diagram of an electronic device according to an embodiment of the present application. In this embodiment, the electronic device is an ultrasonic device. As Figure 5As shown in the figure, the mains power is transformed by a 24V voltage transformation module and then supplies power to the main power supply module and the standby power supply module via the power line VBUS. The battery supplies power to the main power supply module and the standby power supply module via VBUS. The main power supply module includes multiple 12V modules (12V1, 12V2, 12V3) for supplying power to the circuits on the main board of the ultrasonic device and the ultrasonic front end, etc. The standby power supply module is a 5VSB module. In this embodiment, when the ultrasonic device is powered off, the user can press the power on / off button to make the power switch 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 of PS_ON to the main power supply module to turn 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 5VSB to control 5VSB to turn off. The specific control logic has been described in detail above and will not be elaborated here.

[0099] Those of ordinary skill in the art can understand the specific implementation solutions of the above power management system and electronic device by reading the above description of the power on / off control device. For the sake of brevity, it will not be elaborated here.

[0100] Although example embodiments have been described herein with reference to the accompanying drawings, it should be understood that the above example embodiments are merely exemplary and are not intended to limit the scope of the present application. Those of ordinary skill in the art can make various changes and modifications therein without departing from the scope and spirit of the present application. All such changes and modifications are intended to be included within the scope of the present application as claimed in the appended claims.

[0101] In addition, those skilled in the art can understand that although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments means that it is within the scope of the present application and forms different embodiments. For example, in the claims, any one of the claimed embodiments can be used in any combination.

[0102] It should be noted that the above embodiments illustrate the present application rather than limit the present application, and those skilled in the art can design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in the claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements.

[0103] As described above, it is only the specific implementation manner of the present application or the description of the specific implementation manner. The protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should be covered within the protection scope of the present application. The protection scope of the present application shall be subject to the protection 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 end of the power-on / off detection circuit is used to be connected to the control module, and the output end of the power-on / off detection circuit is used to be 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.

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 a turn-off signal.

3. The power-on / off control device according to claim 2, wherein The turn-off signal includes a normal turn-off signal. The power supply control device further includes a main power supply module, a main board detection circuit and a main board processor. The input end of the main board detection circuit is connected to the power switch, and the output end of the main board detection circuit, the input end of the main power supply module and the input end of the control module are respectively connected to the main board processor. The standby power supply module is connected to the main board detection circuit to supply power to the main board detection circuit. The main board detection circuit is used to send a first turn-off detection signal to the main board processor when the signal output by the power switch is the normal turn-off signal. The main board processor is used to, after receiving the first turn-off detection signal, in response to the received user power-off command, send a second power-off signal to the main power supply module to control the main power supply module to turn off and send a power-off instruction to the control module. Wherein, the control module is specifically used to output the first control signal when receiving the power-off instruction and detecting that the main board processor outputs the second power-off signal.

4. The power-on / off control device according to claim 2, wherein The turn-off signal includes a timeout turn-off signal. The power-on / off control device further includes a sampling circuit. The sampling circuit is used to be 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 turn-off signal. The control module is used to output the first control signal when receiving the sampling signal.

5. The power-on and power-off control device according to claim 4, characterized in that, The power supply control device further includes a main power supply module, a main board detection circuit and a main board processor. The input end of the main board detection circuit is connected to the power switch, and the output end of the main board detection circuit, the input end of the main power supply module and the input end of the control module are respectively connected to the main board processor. The standby power supply module is connected to the main board detection circuit to supply power to the main board detection circuit. The main board detection circuit is used to send a second turn-off detection signal to the main board processor when the signal output by the power switch is the timeout turn-off signal. The main board processor is used to, after receiving the second turn-off detection signal, send a second power-off signal to the main power supply module to control the main power supply module to turn off. Wherein, the control module is specifically used to output the first control signal when receiving the sampling signal and detecting that the main board processor outputs the second power-off 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 end of the first voltage output circuit is connected to the first input end of the power-on / off detection circuit, and the input end of the first voltage output circuit is used to be connected to the output end 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 shutdown signal to the standby power supply module when receiving 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 further used to be 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 start signal, send a start signal to the standby power supply module to control the standby power supply module to start.

8. The power-on / off control device according to claim 7, characterized in that, The power supply control device further includes a main power supply module, a main board detection circuit and a main board processor; the input end of the main board detection circuit is connected to the power switch, and the output end of the main board detection circuit and the input end of the main power supply module are respectively connected to the main board processor; The control module is connected to the standby power supply module; the standby power supply module is connected to the main board detection circuit to supply power to the main board detection circuit; the power-on / off control device further includes a second voltage output circuit; the first end of the second voltage output circuit is used to be connected to the control module, and the second end of the second voltage output circuit is used to be connected to the power switch at a 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 started. The second voltage output circuit is used to adjust the voltage at the first node to a second target voltage value via the second end when receiving the second control signal via the first end, so that the power switch outputs a second start signal; The main board detection circuit is used to detect the signal output by the power switch, and when detecting that the signal output by the power switch is the second start signal, send a start detection signal to the main board processor, and the main board processor is used to send a third control signal to the main power supply module after receiving the start detection signal to control the main power supply module to start.

9. The power-on / off control device according to claim 8, wherein, The power-on / off control device further includes a power output circuit; the output end of the power output circuit is connected to the second end of the second voltage output circuit at a 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 a start signal and a shutdown signal, where 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 further configured to send a first shutdown signal to the standby power supply module to control the standby power supply module to shut down when the actual voltage value is lower than the voltage threshold.

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

12. An electronic device, characterized in that, It includes the power management system according to claim 11.

13. The electronic device according to claim 12, wherein The electronic device is an ultrasonic device.

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