Power supply control circuit and electronic equipment

Abstract

The utility model provides a power supply control circuit and electronic equipment. The circuit comprises a power management integrated circuit (PMIC) which is respectively connected with a battery and a first load and is used for controlling the on-off of power supply between the battery and the first load; the first switch is arranged on a circuit between the battery and the PMIC and is used for controlling the on-off of power supply between the battery and the PMIC; wherein the PMIC is used for controlling the first switch to be switched off under the condition that the power supply to the first load is stopped. According to the embodiment of the invention, the first switch is disconnected when the first load is powered off, so that the battery stops supplying power to the PMIC, the power supply connection between the battery and the mainboard is completely disconnected, and the problems that when the first load is powered off, the PMIC and other modules mounted on the electronic equipment consume the power of the battery, so that the power of the battery is reduced, and the reliability of the electronic equipment is improved are solved. And the health degree of the battery is even damaged.

Description

Technical Field

[0001] The present disclosure relates to the technical field of power supply control, and in particular to a power supply control circuit and an electronic device. Background Art

[0002] During the production, transportation and sales of electronic devices, they usually go through a long transportation process and storage period. During long transportation or storage, if the circuit remains in a normally open state, the static current of other chips and circuits in the system will cause the battery to discharge, thereby reducing the battery reserve power, damaging the battery health, and even causing consumers to be unable to turn on the device after purchasing it. The shipping mode is a special mode for electronic devices, which is designed to avoid battery discharge when the device is in long transportation or storage, to ensure that the system still has sufficient power and battery health when it is turned on.

[0003] In the related art, the shipping mode is usually achieved by sending a command to the PMIC to stop the PMIC from supplying power to the CPU, baseband and other loads in the electronic device. However, this implementation does not completely disconnect the power supply connection between the battery and the PMIC, and the PMIC and other modules mounted on the electronic device will still consume the battery power, thereby causing the battery power to drop and even damaging the battery health. Summary of the invention

[0004] In order to overcome the problems existing in the related art, the present disclosure provides a power supply control circuit and an electronic device.

[0005] A first aspect of the present disclosure provides a power supply control circuit, the circuit comprising:

[0006] A power management integrated circuit PMIC is connected to the battery and the first load respectively, and is used to control the power supply between the battery and the first load;

[0007] A first switch, provided on a line between the battery and the PMIC, for controlling the power supply between the battery and the PMIC;

[0008] The PMIC is used to control the first switch to be disconnected when power supply to the first load is stopped.

[0009] Optionally, the PMIC is provided with a second switch, and the control end of the first switch and the first load are respectively connected to the output end of the second switch;

[0010] The PMIC is used to control the on / off of power supply between the battery and the first load and the on / off of the first switch by turning on / off the second switch.

[0011] Optionally, the circuit further includes a coil, wherein the coil is connected to the control end of the first switch, and the coil is used to receive electric energy so that the electric energy is transmitted to the control end of the first switch to turn on the first switch.

[0012] Optionally, the circuit also includes a third switch, which is arranged on the line between the coil and the first switch, and the PMIC is used to control the third switch to be turned on when the power supply to the first load is stopped, and to control the third switch to be turned off when the power supply to the first load is supplied.

[0013] Optionally, the PMIC is provided with a second switch, and the control end of the third switch and the first load are respectively connected to the output end of the second switch;

[0014] The PMIC is used to control the power supply on and off between the battery and the first load and the power supply on and off between the coil and the first switch by turning on and off the second switch.

[0015] Optionally, the coil includes a near-field wireless communication technology NFC coil;

[0016] And / or, the coil includes a wireless charging coil.

[0017] Optionally, an output end of the first switch is connected to a second load, and the first switch is used to control the on / off power supply between the battery and the second load.

[0018] Optionally, the PMIC is configured to stop supplying power to the first load upon receiving a user instruction instructing to start a preset mode.

[0019] Optionally, the first switch comprises a semiconductor switch; and / or,

[0020] The second switch comprises a semiconductor switch; and / or,

[0021] The third switch includes a semiconductor switch.

[0022] A second aspect of the present disclosure provides an electronic device, wherein the electronic device is equipped with the power supply control circuit as described in the first aspect.

[0023] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects:

[0024] In the embodiment of the present disclosure, a first switch for controlling the power supply on and off between the battery and the PMIC is provided on the line between the battery and the PMIC, and at the same time, the PMIC is used to control the first switch to be disconnected when the power supply to the first load is stopped. In other words, the embodiment of the present disclosure makes the first switch disconnected when the first load is powered off, so that the battery stops supplying power to the PMIC, and completely disconnects the power supply connection between the battery and the mainboard, thereby solving the problem that when the first load is powered off, the PMIC and other modules mounted on the electronic device still consume battery power, thereby causing a decrease in battery power and even damaging the battery health.

[0025] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0027] Figure 1 is a schematic diagram of a power supply control circuit shown in some exemplary embodiments.

[0028] Figure 2 is a schematic diagram of another power supply control circuit shown in some exemplary embodiments.

[0029] Figure 3 is a schematic diagram of yet another power supply control circuit shown in some exemplary embodiments.

[0030] Figure 4 is a control logic diagram of a power supply control circuit shown in some exemplary embodiments.

[0031] Figure 5 It is a hardware structure diagram of an electronic device shown in some exemplary embodiments. DETAILED DESCRIPTION

[0032] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present disclosure. Instead, they are merely examples of electronic devices and circuits consistent with some aspects of the present disclosure as detailed in the appended claims.

[0033] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. The singular forms of "a", "said" and "the" used in this disclosure and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0034] It should be understood that although the terms first, second, third, etc. may be used in the present disclosure to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0035] The production, transportation and sales of electronic devices usually require a long transportation process and storage period. During long-term transportation or storage, if the circuit remains in a normally on state, the static current of other chips and circuits in the system will cause the battery to discharge, thereby reducing the battery reserve power, damaging the battery health, and even causing consumers to be unable to turn on the device after purchasing it. The shipping mode is a special mode of electronic equipment, which is designed to avoid battery discharge when the device is in long-term transportation or storage, to ensure that the system still has sufficient power and battery health when it is turned on. It should be understood that the shipping mode is only a name that is convenient for description. It can also be called shipping mode, storage mode, or preset mode, A mode, etc.

[0036] See also Figure 1 , which exemplarily gives a schematic diagram of a power supply control circuit, wherein the battery outputs VBAT (VoltageBattery, battery voltage) to the PMIC (Power Management Integrated Circuit, power management integrated circuit), and the PMIC provides VSYS (Voltage System, system voltage) to the first load, so that the first load is powered on and works. At the same time, a POWER key (also commonly called a switch key or power key) is provided between the CHG_QONB pin (here is only an exemplary pin, the specific connection method and naming may vary according to the actual situation) on the PMIC and the GND ground (usually a preset potential reference point), then the PMIC can sense the user's pressing and releasing operations on the POWER key by collecting the potential changes of the CHG_QONB pin. In addition, the PMIC can also accept user instructions based on other hardware or software, or perform operations based on preset logic.

[0037] In the related art, the shipping mode is usually achieved by sending a command to the PMIC to stop the PMIC from supplying power to the CPU or baseband and other loads in the electronic device (i.e., stop providing VSYS). However, this implementation does not completely disconnect the power supply connection between the battery and the PMIC. The PMIC and other modules mounted on the electronic device continue to receive power (i.e., VBAT still exists). The pull-up voltage of the POWER button, the power supply of the PMIC module, and other loads powered by VBAT (i.e., Figure 1 The second load in the battery) will still consume battery power, resulting in a decrease in battery power and even damage to battery health.

[0038] In view of this, the present disclosure provides a power supply control circuit and an electronic device. Next, the embodiments of the present disclosure are described in detail.

[0039] It is worth noting that, for the sake of convenience of description, in the present disclosure, VSYS may be used to refer to a transmission line or a transmission line group for transmitting a system voltage, or other electronic components that maintain the same potential as VSYS; similarly, VBAT may be used to refer to a transmission line or a transmission line group for transmitting a battery voltage, or other conductors or circuits that maintain the same potential as VBAT. In addition, the input end and the output end of the switch component (such as the first switch, the second switch, and the third switch) provided in the present disclosure respectively refer to the two ends that can form a closed circuit after the switch is turned on and form an open circuit after the switch is turned off, and the control end refers to one or more ends that can control whether the switch is turned on, wherein, in the case where the switch component realizes bidirectional conduction, the names of the input end and the output end can be interchangeable, and in the case where the switch component realizes unidirectional conduction, the names of the input end and the output end can be determined according to the direction of current flow. It should be understood that in the case where the switch component has multiple control ends, the equivalent solution of the technical solution provided in the present disclosure can be realized by simple configuration depending on the actual situation, and it does not affect the original technical effect of the present disclosure.

[0040] In a first aspect, the present disclosure provides a power supply control circuit, which can be applied to electronic devices such as mobile phones and tablet computers. The electronic devices may include modules such as a battery and a first load. The circuit includes:

[0041] The power management integrated circuit PMIC is connected to the battery and the first load respectively, and is used to control the power supply between the battery and the first load.

[0042] Specifically, the first load may be a central processing unit load, a baseband load, etc. on the electronic device.

[0043] The first switch is provided on the line between the battery and the PMIC, and is used to control the power supply between the battery and the PMIC.

[0044] Specifically, the input end and the output end of the first switch can be connected to the battery and the PMIC respectively, or connected to a conductor connected to the battery and the PMIC, so that the power supply between the battery and the PMIC is controlled by the first switch.

[0045] The PMIC is used to control the first switch to be disconnected when power supply to the first load is stopped.

[0046] The control logic of the above-mentioned PMIC can be implemented by changing the software and hardware structure of the PMIC itself, or by simple conductor connection. The following provides an example of a preferred implementation:

[0047] The PMIC is provided with a second switch, and the control end of the first switch and the first load are respectively connected to the output end of the second switch;

[0048] The PMIC is used to control the on / off of power supply between the battery and the first load and the on / off of the first switch by turning on / off the second switch.

[0049] See also Figure 2 , wherein Q4 is the second switch, and K1 is the first switch (Q4 and K1 are just a common naming convention). The input end of Q4 is connected to VBAT, and the output end is connected to VSYS. The PMIC controls the on-off of VBAT and VSYS by controlling the on-off of Q4, thereby controlling the on-off of the power supply between the battery and the first load; in addition, the output end of Q4 is also connected to K1, thereby forming a connection mode in which K1 and the first load are connected in parallel to the output end of Q4. By setting K1 to be turned on when the control end is at a high potential and disconnected when the control end is at a low potential, the PMIC can simply change the connection mode to disconnect the first switch when the battery is disconnected from supplying power to the first load. Without changing the original control logic of the PMIC, the battery and the load (including the PMIC) can be completely disconnected at a low cost.

[0050] In addition, the output end of the first switch can also be connected to a second load, and the first switch is used to control the power supply on and off between the battery and the second load. Specifically, taking the case where the power supply control circuit is installed inside a mobile phone, the electronic components (i.e., loads) inside the mobile phone can be roughly divided into two types according to different needs: the first type (i.e., the first load) is mainly used to provide system and application level services, such as central processing unit, baseband load, etc. In the shutdown mode of the mobile phone, these electronic components usually do not need to work; the second type (i.e., the second load) is the electronic components that still need to work in the shutdown mode of the mobile phone, such as the system clock (to ensure that the clock of the mobile phone runs normally), the RF load (to ensure that the mobile phone can still receive signals), etc. In the related technology, the PMIC cannot disconnect the power supply connection between the second load and the battery, but under the requirements of the aforementioned shipping mode, neither the first load nor the second load needs to work. Therefore, preferably, it can be in accordance with Figure 2 In the manner shown, the input end of the first switch is directly connected to the battery, and the PMIC, the second load and other loads are connected to the output end of the first switch, so that the power supply control circuit provided in the present disclosure can disconnect the power supply of the PMIC and the second load at the same time when the first load is powered off, and further cut off the power supply connection between the battery and the internal load of the body, so that the battery power and health can be preserved as much as possible.

[0051] In the embodiment of the present disclosure, a first switch for controlling the power supply on and off between the battery and the PMIC is provided on the line between the battery and the PMIC, and at the same time, the PMIC is used to control the first switch to be disconnected when the power supply to the first load is stopped. In other words, the embodiment of the present disclosure makes the first switch disconnected when the first load is powered off, so that the battery stops supplying power to the PMIC, and completely disconnects the power supply connection between the battery and the mainboard, thereby solving the problem that when the first load is powered off, the PMIC and other modules mounted on the electronic device still consume battery power, thereby causing a decrease in battery power and even damaging the battery health.

[0052] In some embodiments of the present disclosure, a preferred supporting wake-up solution is further provided for the embodiments provided in the aforementioned embodiments. Specifically, when the demand for the shipping mode no longer exists and the device equipped with the power supply control circuit provided by the present disclosure needs to exit the shipping mode, the first switch can be turned on manually, or based on the following example: Figure 3 The following preferred methods are shown:

[0053] The circuit further includes a coil, wherein the coil is connected to the control end of the first switch, and the coil is used to receive electric energy so that the electric energy is transmitted to the control end of the first switch to turn on the first switch.

[0054] The first switch is set to be turned on when the control end is at a high potential and turned off when the control end is at a low potential. Then, the first switch can be turned on by setting a coil and transmitting the electric energy received by the coil to the control end of the first switch. Specifically, the coil can be an NFC (Near Field Communication) coil or a wireless charging coil, etc. Through the above implementation, without changing the body structure of the device equipped with the power supply control circuit, the wireless power supply coil or NFC coil and other components of the device can be used to receive electric energy and power on the PMIC. It should be understood that in the present disclosure, the coil is only a preferred means of receiving electric energy. If the device equipped with the power supply control circuit is not equipped with or connected to the coil component, it can be provided by providing a contact or using the power supply contact (such as a charging interface, an audio interface) on the device. By connecting the power supply contact and the control end of the first switch, the operator can transmit electric energy to the first switch in a simple way and turn on the first switch, so that the advantages of the power supply control circuit provided by the present disclosure, such as low cost, high availability, and convenient use, are more significant.

[0055] In addition, in order to further improve the availability and stability of the power supply control circuit, the circuit further includes a third switch (ie Figure 3 K2), the third switch is arranged on the line between the coil and the first switch, and the PMIC is used to control the third switch to be turned on when the power supply to the first load is stopped, and to control the third switch to be turned off when the power supply to the first load is supplied.

[0056] Specifically, the input end of the third switch can be connected to the coil, the output end can be connected to the control end of the first switch, the control end of the third switch can be connected to the output end of Q4 (that is, the PMIC is provided with a second switch, the control end of the third switch and the first load are respectively connected to the output end of the second switch) or VSYS, and the third switch is set to be disconnected when the control end is at a high potential and turned on when the control end is at a low potential. Through the above configuration, it is realized that the third switch is in the on state only after VSYS is powered off and the device enters the shipping mode, and the coil power can control the first switch to be turned on, avoiding the situation that the power supply of the device is unstable due to the power provided by VSYS and the coil controlling the first switch at the same time when the user uses the device equipped with the power supply control circuit in daily life, thereby achieving complete insensitivity on the user side and improving the user experience.

[0057] In some embodiments of the present disclosure, the PMIC is used to stop supplying power to the first load when receiving a user instruction indicating to turn on the preset mode. Specifically, the preset mode can be the aforementioned shipping mode. Generally speaking, since long-term transportation or warehousing requirements are rarely involved in the daily use of users, the shutdown operation performed by the user is usually achieved by controlling the first load to stop working at the software level (the PMIC does not disconnect the power supply connection between the battery and the first load, but only makes the first load in a static state), thereby taking into account the power consumption of the device and the startup speed. When the device involves the requirements of the aforementioned storage mode, the PMIC is required to completely disconnect the power supply connection between the battery and the first load (at the same time, disconnect the power supply connection between the battery and the PMIC and the second load), so that the shutdown mode can be further distinguished from the shipping mode, taking into account the user experience during daily use and the aforementioned shipping mode requirements.

[0058] In some embodiments of the present disclosure, the first switch may be a semiconductor switch. In addition, the second switch and the third switch may also be semiconductor switches, such as triodes, quaternaries, MOS tubes (Metal-Oxide-SemiconductorField-Effect Transistors), etc. These electronic components take into account the feasibility and implementation cost of the solution and are a preferred implementation solution. It should be understood that the first switch, the second switch, and the third switch may also be non-semiconductor electronic components or circuits that can achieve the same effect, and the present disclosure does not limit this.

[0059] In combination with at least one of the above embodiments, taking the device equipped with the power supply control circuit as a mobile phone, the user instruction to enter the shipping mode is to long press the POWER key, the user instruction to exit the shipping mode and enter the shutdown mode is to short press the POWER key, and the user instruction to exit the shutdown mode and enter the power-on mode is to long press the POWER key as an example, based on Figure 3 The naming in can be obtained as Figure 4 Exemplary control steps shown:

[0060] Step 1: The mobile phone system is in power-on mode, and the operator long presses the POWER button;

[0061] Step 2: PMIC receives a user instruction to start the preset mode (i.e., long press the POWER key), controls Q4 (the second switch) to be non-conductive, thereby powering off VSYS (powering off), K1 (the first switch) to be non-conductive, and K2 (the third switch) to be conductive, thereby powering off VBAT (i.e., powering off the second load and PMIC), and the mobile phone enters the shipping mode;

[0062] Step 3: The operator sets the NFC coil of the other device to active mode (i.e., actively generates a radio frequency field), and contacts the NFC coil of the other device with the NFC coil of the mobile phone (so that the NFC coil of the mobile phone can receive enough power to turn on K1), so that K1 is turned on and VBAT is powered on (i.e., the second load, PMIC is powered on, and the operator can send instructions to PMIC through the POWER button at this time);

[0063] Step 4: The operator short presses the POWER button, and the PMIC turns on Q4, so that VSYS supplies power to the first load. At the same time, in response to the power-on of VSYS, K2 is disconnected, and the NFC coil can no longer control K1 (the NFC coil of the other device may be turned on at this time). At this time, the control end of K1 is connected to VSYS, so K1 is controlled by the power-on of VSYS and turned on;

[0064] Step 5: The operator presses and holds the POWER button, the phone exits shutdown mode and boots up normally, returning to power-on mode.

[0065] For the relevant details and beneficial effects of the above control steps, please refer to the relevant parts of the above embodiments, which will not be repeated here.

[0066] In a second aspect, the present disclosure further provides an electronic device equipped with the power supply control circuit described in the first aspect, please refer to the attached Figure 5 , which exemplarily shows a hardware schematic diagram of an electronic device. For example, the device 500 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc.

[0067] Device 500 may include one or more of the following components: a processing component 501 , a memory 502 , a power component 503 , a multimedia component 504 , an audio component 505 , an input / output (I / O) interface 506 , a sensor component 507 , and a communication component 508 .

[0068] The processing component 501 generally controls the overall operation of the device 500, such as operations associated with display, phone calls, data communications, camera operations, and recording operations. The processing component 501 may include one or more processors 509 to execute instructions to complete all or part of the steps of the above-mentioned circuit. In addition, the processing component 501 may include one or more modules to facilitate the interaction between the processing component 501 and other components. For example, the processing component 501 may include a multimedia module to facilitate the interaction between the multimedia component 504 and the processing component 501.

[0069] The memory 502 is configured to store various types of data to support operations on the device 500. Examples of such data include instructions for any application or circuitry operating on the device 500, contact data, phone book data, messages, pictures, videos, etc. The memory 502 may be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk, or optical disk.

[0070] Power component 503 provides power to various components of device 500. Power component 503 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to device 500.

[0071] The multimedia component 504 includes a screen that provides an output interface between the device 500 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundaries of the touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 504 includes a front camera and / or a rear camera. When the device 500 is in an operating mode, such as a shooting mode or a video mode, the front camera and / or the rear camera may receive external multimedia data. Each front camera and the rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

[0072] The audio component 505 is configured to output and / or input audio signals. For example, the audio component 505 includes a microphone (MIC), and when the device 500 is in an operating mode, such as a call mode, a recording mode, and a speech recognition mode, the microphone is configured to receive an external audio signal. The received audio signal can be further stored in the memory 502 or sent via the communication component 508. In some embodiments, the audio component 505 also includes a speaker for outputting audio signals.

[0073] I / O interface 506 provides an interface between processing component 501 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include but are not limited to: home button, volume button, start button, and lock button.

[0074] The sensor assembly 507 includes one or more sensors for providing various aspects of status assessment for the device 500. For example, the sensor assembly 507 can detect the open / closed state of the device 500, the relative positioning of components, such as the display and keypad of the device 500, and the sensor assembly 507 can also detect the position change of the device 500 or a component of the device 500, the presence or absence of user contact with the device 500, the orientation or acceleration / deceleration of the device 500, and the temperature change of the device 500. The sensor assembly 507 can also include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 507 can also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 507 can also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0075] The communication component 508 is configured to facilitate wired or wireless communication between the device 500 and other devices. The device 500 can access a wireless network based on a communication standard, such as WiFi, 2G or 3G, 4G or 5G or a combination thereof. In an exemplary embodiment, the communication component 508 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 508 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

[0076] In an exemplary embodiment, the device 500 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to execute the holding method determination circuit of the above-mentioned electronic device.

[0077] The above describes specific embodiments of the present disclosure. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0078] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the inventions claimed herein. The present disclosure is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not claimed in the present disclosure. The description and examples are to be considered exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0079] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

[0080] The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the scope of protection of the present disclosure.

Claims

1. A power supply control circuit, characterized in that: The circuit comprises: A power management integrated circuit PMIC is connected to the battery and the first load respectively, and is used to control the power supply between the battery and the first load; A first switch, provided on a line between the battery and the PMIC, for controlling the power supply between the battery and the PMIC; The PMIC is used to control the first switch to be disconnected when power supply to the first load is stopped.

2. The power supply control circuit according to claim 1, characterized in that: The PMIC is provided with a second switch, and the control end of the first switch and the first load are respectively connected to the output end of the second switch; The PMIC is used to control the on / off of power supply between the battery and the first load and the on / off of the first switch by turning on / off the second switch.

3. The power supply control circuit according to claim 1, characterized in that: The circuit further includes a coil, wherein the coil is connected to the control end of the first switch, and the coil is used to receive electric energy so that the electric energy is transmitted to the control end of the first switch to turn on the first switch.

4. The power supply control circuit according to claim 3, characterized in that: The circuit also includes a third switch, which is arranged on a line between the coil and the first switch. The PMIC is used to control the third switch to be turned on when power supply to the first load is stopped, and to control the third switch to be turned off when power is supplied to the first load.

5. The power supply control circuit according to claim 4, characterized in that: The PMIC is provided with a second switch, and the control end of the third switch and the first load are respectively connected to the output end of the second switch; The PMIC is used to control the power supply on and off between the battery and the first load and the power supply on and off between the coil and the first switch by turning on and off the second switch.

6. The power supply control circuit according to claim 3, characterized in that: The coil includes a NFC coil; and / or, The coil comprises a wireless charging coil.

7. The power supply control circuit according to claim 1, characterized in that: The output end of the first switch is connected to the second load, and the first switch is used to control the power supply between the battery and the second load.

8. The power supply control circuit according to claim 1, characterized in that: The PMIC is configured to stop supplying power to the first load when receiving a user instruction instructing to start a preset mode.

9. The power supply control circuit according to claim 5, characterized in that: The first switch comprises a semiconductor switch; and / or, The second switch comprises a semiconductor switch; and / or, The third switch includes a semiconductor switch.

10. An electronic device, characterized in that: The electronic device is equipped with the power supply control circuit as claimed in any one of claims 1 to 9.

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