Power supply system and terminal equipment

Abstract

The invention discloses a power supply system and terminal equipment. The terminal equipment comprises an interface module, an overvoltage protection OVP module, a power management unit PMU module, a load switching LS module and a wireless charging system. Wherein the interface module is connected with one end of the OVP module and one end of the LS module; the other end of the OVP module is connected with the first end of the PMU module and the first end of the wireless charging system; the second end of the wireless charging system is connected with the other end of the LS module; when the wireless charging system converts magnetic energy into electric energy and the LS module is switched on, the wireless charging system is used for supplying power to the interface module through the second end and the LS module. According to the embodiment of the invention, the use of an external transformation circuit can be reduced, and the mainboard space and the device cost are saved.

Description

Technical Field

[0001] This application relates to the field of terminal equipment technology, and in particular to a power supply system and a terminal device. Background Technology

[0002] The terminal device has various functions, such as OTG functionality, motor vibration functionality, and wireless charging functionality. In OTG functionality, the terminal device needs to be powered on its interface module to transmit data with external devices. To achieve these functions, the terminal device requires a dedicated boost circuit. This boost voltage is connected to the main power supply of the power management unit (PMU) module to specifically power the interface module and the wireless charging system module. However, adding a separate boost circuit requires more motherboard space and incurs higher costs. Summary of the Invention

[0003] This application provides a power supply system and terminal equipment that can save motherboard space and reduce equipment costs.

[0004] In a first aspect, embodiments of this application provide a terminal device, the terminal device including an interface module, an overvoltage protection (OVP) module, a power management unit (PMU) module, a load switching (LS) module, and a wireless charging system; wherein: the interface module is connected to one end of the OVP module and one end of the LS module; the other end of the OVP module is connected to the first end of the PMU module and the first end of the wireless charging system; the second end of the wireless charging system is connected to the other end of the LS module; wherein, when the wireless charging system converts magnetic energy into electrical energy and the LS module is turned on, the wireless charging system is used to supply power to the interface module through the second end and the LS module.

[0005] The interface module can be the Type-C interface module in this application, or it can be other types of interface modules.

[0006] In this embodiment, the terminal device reduces the use of external transformer circuits and does not need to set up a separate power supply circuit for the OTG function. Instead, it supplies power to both the motor drive and the interface module through the first transformer circuit inside the PMU module, reducing the need for an external transformer circuit module, saving motherboard space and hardware costs.

[0007] In one possible implementation, when the On-the-Go (OTG) device data exchange technology is activated, if the wireless charging system does not convert magnetic energy into electrical energy, the OVP module is turned on, and the terminal device supplies power to the interface module through the first terminal of the PMU module and the OVP module. If the wireless charging system converts magnetic energy into electrical energy, the LS module is turned on, and the terminal device supplies power to the interface module through the second terminal of the wireless charging system and the LS module. In this way, the forward wireless charging state of the wireless charging system determines the OTG power supply path and whether the LS or OVP is on, ensuring flexible adaptation to different OTG power supply paths and completing the power supply to the interface module. This reduces the need for external transformer circuit modules, saving circuit design space and cost.

[0008] In one possible implementation, the terminal device further includes a battery module, and the PMU module further includes a transformer circuit, a first switch module, and a second switch module. The other end of the OVP module is connected to the first end of the PMU module, including: the other end of the OVP module is connected to the first end of the first switch module; the second end of the first switch module is connected to the first end of the transformer circuit; the second end of the transformer circuit is connected to the second end of the PMU module and the first end of the second switch module; and the second end of the second switch module is connected to the battery module. In this way, the reverse boost function of the transformer circuit can be used to construct a path for powering the interface module, ensuring the reliability of OTG power supply.

[0009] In one possible implementation, the OVP module is turned on, and the terminal device supplies power to the interface module through the first terminal of the PMU module and the OVP module. This includes: the OVP module, the first switch module, and the second switch module are all turned on; the transformer circuit boosts the battery voltage and supplies power to the interface module through the OVP module. In this way, the reverse boost function of the transformer circuit can be used to construct a power supply path to the interface module, ensuring the reliability of OTG power supply.

[0010] In one possible implementation, the wireless charging system includes a first charging channel and a second charging channel, a resonant circuit, and a rectifier module. The resonant circuit is connected to one end of the rectifier module, and the other end of the rectifier module is connected to one end of the first charging channel and one end of the second charging channel. The other end of the first charging channel serves as the first end of the wireless charging system, and the other end of the second charging channel serves as the second end of the wireless charging system. When the first device wirelessly charges the terminal device, the resonant circuit converts magnetic energy into electrical energy to obtain alternating current (AC). The rectifier module integrates the AC into direct current (DC) and supplies power to the first and second charging channels. Thus, utilizing the voltage conversion and regulation functions of the LDO charging channel, the wireless charging system, during forward wireless charging, provides the acquired voltage to the interface module after step-down and regulation, reducing the space and cost of the external transformer circuit module and ensuring the completion of the OTG function.

[0011] The first charging channel is the first LDO charging channel, and the second charging channel is the second LDO charging channel.

[0012] In one possible implementation, the LS module is turned on, and the terminal device supplies power to the interface module through the second terminal of the wireless charging system and the LS module. This includes: the second charging channel converting the DC voltage input at one end of the second charging channel into a voltage, and the output voltage at the other end of the second charging channel; when the OTG function is activated, the LS module is turned on, and the output voltage is used to supply power to the interface module. In this way, the terminal device can utilize the voltage conversion and regulation functions of the LDO charging channel. During forward wireless charging, the wireless charging system provides the acquired voltage to the interface module after step-down and regulation, reducing the space and cost of the external transformer circuit module and ensuring the completion of the OTG function.

[0013] In one possible implementation, upon receiving an OTG termination request, if the LS module is on, the terminal device controls the LS module to be off; if the OVP module is on, the terminal device controls the OVP module to be off. This way, when terminating the OTG function, the corresponding OTG power supply path is shut down, releasing the current circuit channel and ensuring circuit flexibility and versatility in supporting functions.

[0014] In one possible implementation, when the OTG function is activated, if the wireless charging system does not convert magnetic energy into electrical energy, the OVP module is turned on. After the terminal device supplies power to the interface module through the first terminal of the PMU module and the OVP module, the terminal device detects that the wireless charging system has started converting magnetic energy into electrical energy. The terminal device then controls the LS module to turn on, and the wireless charging system begins supplying power to the interface module through the LS module. Simultaneously, the terminal device controls the OVP module to turn off, and the PMU module stops supplying power to the interface module through the OVP module. Thus, when the OTG function is activated, the state of the terminal device's forward wireless charging changes, and the OTG power supply path needs to be adaptively adjusted to ensure that both forward wireless charging and OTG can be executed, preventing functional conflicts and ensuring the effectiveness and rationality of the logic control.

[0015] In one possible implementation, when the OTG function is activated, if the wireless charging system converts magnetic energy into electrical energy, the LS module is turned on. After the terminal device supplies power to the interface module through the second terminal of the wireless charging system and the LS module, if the terminal device detects that the wireless charging system stops converting magnetic energy into electrical energy, the terminal device controls the OVP module to turn on, and the PMU module starts supplying power to the interface module through the OVP module; and controls the LS module to turn off, and the wireless charging system stops supplying power to the interface module through the LS module. Thus, when the OTG function is activated, the state of the terminal device's forward wireless charging changes, and the OTG power supply path also needs to be adaptively adjusted to ensure that both forward wireless charging and OTG can be executed, ensuring that the functions do not conflict and that the logic control is effective and reasonable.

[0016] Secondly, embodiments of this application provide a power supply system, the power supply circuit system including an interface module, an overvoltage protection (OVP) module, a power management unit (PMU) module, a load switching (LS) module, and a wireless charging system; wherein: the interface module is connected to one end of the OVP module and one end of the LS module; the other end of the OVP module is connected to the first end of the PMU module and the first end of the wireless charging system; the second end of the wireless charging system is connected to the other end of the LS module; wherein, when the wireless charging system converts magnetic energy into electrical energy and the LS module is turned on, the wireless charging system is used to supply power to the interface module through the second end and the LS module.

[0017] The interface module can be the Type-C interface module in this application, or it can be other types of interface modules.

[0018] In this embodiment, the terminal device reduces the use of external transformer circuits and does not need to set up a separate power supply circuit for the OTG function. Instead, it supplies power to both the motor drive and the interface module through the first transformer circuit inside the PMU module, reducing the need for an external transformer circuit module, saving motherboard space and hardware costs.

[0019] In one possible implementation, when the On-the-Go (OTG) device data exchange technology is activated, if the wireless charging system does not convert magnetic energy into electrical energy, the OVP module is turned on, and the terminal device supplies power to the interface module through the first terminal of the PMU module and the OVP module. If the wireless charging system converts magnetic energy into electrical energy, the LS module is turned on, and the terminal device supplies power to the interface module through the second terminal of the wireless charging system and the LS module. In this way, the forward wireless charging state of the wireless charging system determines the OTG power supply path and whether the LS or OVP is on, ensuring flexible adaptation to different OTG power supply paths and completing the power supply to the interface module. This reduces the need for external transformer circuit modules, saving circuit design space and cost.

[0020] In one possible implementation, the terminal device further includes a battery module, and the PMU module further includes a transformer circuit, a first switch module, and a second switch module. The other end of the OVP module is connected to the first end of the PMU module, including: the other end of the OVP module is connected to the first end of the first switch module; the second end of the first switch module is connected to the first end of the transformer circuit; the second end of the transformer circuit is connected to the second end of the PMU module and the first end of the second switch module; and the second end of the second switch module is connected to the battery module. In this way, the reverse boost function of the transformer circuit can be used to construct a path for powering the interface module, ensuring the reliability of OTG power supply.

[0021] In one possible implementation, the OVP module is turned on, and the terminal device supplies power to the interface module through the first terminal of the PMU module and the OVP module. This includes: the OVP module, the first switch module, and the second switch module are all turned on; the transformer circuit boosts the battery voltage and supplies power to the interface module through the OVP module. In this way, the reverse boost function of the transformer circuit can be used to construct a power supply path to the interface module, ensuring the reliability of OTG power supply.

[0022] In one possible implementation, the wireless charging system includes a first charging channel and a second charging channel, a resonant circuit, and a rectifier module. The resonant circuit is connected to one end of the rectifier module, and the other end of the rectifier module is connected to one end of the first charging channel and one end of the second charging channel. The other end of the first charging channel serves as the first end of the wireless charging system, and the other end of the second charging channel serves as the second end of the wireless charging system. When the first device wirelessly charges the terminal device, the resonant circuit converts magnetic energy into electrical energy to obtain alternating current (AC). The rectifier module integrates the AC into direct current (DC) and supplies power to the first and second charging channels. Thus, utilizing the voltage conversion and regulation functions of the LDO charging channel, the wireless charging system, during forward wireless charging, provides the acquired voltage to the interface module after step-down and regulation, reducing the space and cost of the external transformer circuit module and ensuring the completion of the OTG function.

[0023] In one possible implementation, the LS module is turned on, and the terminal device supplies power to the interface module through the second terminal of the wireless charging system and the LS module. This includes: the second charging channel converting the DC voltage input at one end of the second charging channel into a voltage, and the output voltage at the other end of the second charging channel; when the OTG function is activated, the LS module is turned on, and the output voltage is used to supply power to the interface module. In this way, the terminal device can utilize the voltage conversion and regulation functions of the LDO charging channel. During forward wireless charging, the wireless charging system provides the acquired voltage to the interface module after step-down and regulation, reducing the space and cost of the external transformer circuit module and ensuring the completion of the OTG function.

[0024] In one possible implementation, upon receiving an OTG termination request, if the LS module is on, the terminal device controls the LS module to be off; if the OVP module is on, the terminal device controls the OVP module to be off. This way, when terminating the OTG function, the corresponding OTG power supply path is shut down, releasing the current circuit channel and ensuring circuit flexibility and versatility in supporting functions.

[0025] In one possible implementation, when the OTG function is activated, if the wireless charging system does not convert magnetic energy into electrical energy, the OVP module is turned on. After the terminal device supplies power to the interface module through the first terminal of the PMU module and the OVP module, the terminal device detects that the wireless charging system has started converting magnetic energy into electrical energy. The terminal device then controls the LS module to turn on, and the wireless charging system begins supplying power to the interface module through the LS module. Simultaneously, the terminal device controls the OVP module to turn off, and the PMU module stops supplying power to the interface module through the OVP module. Thus, when the OTG function is activated, the state of the terminal device's forward wireless charging changes, and the OTG power supply path needs to be adaptively adjusted to ensure that both forward wireless charging and OTG can be executed, preventing functional conflicts and ensuring the effectiveness and rationality of the logic control.

[0026] In one possible implementation, when the OTG function is activated, if the wireless charging system converts magnetic energy into electrical energy, the LS module is turned on. After the terminal device supplies power to the interface module through the second terminal of the wireless charging system and the LS module, if the terminal device detects that the wireless charging system stops converting magnetic energy into electrical energy, the terminal device controls the OVP module to turn on, and the PMU module starts supplying power to the interface module through the OVP module; and controls the LS module to turn off, and the wireless charging system stops supplying power to the interface module through the LS module. Thus, when the OTG function is activated, the state of the terminal device's forward wireless charging changes, and the OTG power supply path also needs to be adaptively adjusted to ensure that both forward wireless charging and OTG can be executed, ensuring that the functions do not conflict and that the logic control is effective and reasonable.

[0027] Thirdly, this application provides a power supply system control method. The terminal device includes an interface module, an overvoltage protection (OVP) module, a power management unit (PMU) module, a load switching (LS) module, and a wireless charging system. The interface module is connected to one end of the OVP module and one end of the LS module. The other end of the OVP module is connected to the first end of the PMU module and the first end of the wireless charging system. The second end of the wireless charging system is connected to the other end of the LS module. The method includes: when the wireless charging system converts magnetic energy into electrical energy and the LS module is turned on, the terminal device controls the wireless charging system to supply power to the interface module through the second end and the LS module.

[0028] In this embodiment, the terminal device reduces the use of external transformer circuits and does not need to set up a separate power supply circuit for the OTG function. Instead, it supplies power to both the motor drive and the interface module through the first transformer circuit inside the PMU module, reducing the need for an external transformer circuit module, saving motherboard space and hardware costs.

[0029] In one possible implementation, the method further includes: when the OTG function is activated, if the wireless charging system does not convert magnetic energy into electrical energy, the OVP module is turned on, and the terminal device supplies power to the interface module through the first terminal of the PMU module and the OVP module; when the wireless charging system converts magnetic energy into electrical energy and the LS module is turned on, the terminal device controls the wireless charging system to supply power to the interface module through the second terminal and the LS module, including: if the wireless charging system converts magnetic energy into electrical energy, the LS module is turned on, and the terminal device supplies power to the interface module through the second terminal of the wireless charging system and the LS module. In this way, the forward wireless charging state of the wireless charging system determines the OTG power supply path, determines whether the LS or OVP is on, ensuring flexible adaptation to different OTG power supply paths and completing the power supply to the interface module. This reduces the need for external transformer circuit modules, saving circuit design space and cost.

[0030] In one possible implementation, the terminal device further includes a battery module, and the PMU module further includes a transformer circuit, a first switch module, and a second switch module. The other end of the OVP module is connected to the first end of the PMU module, including: the other end of the OVP module is connected to the first end of the first switch module; the second end of the first switch module is connected to the first end of the transformer circuit; the second end of the transformer circuit is connected to the second end of the PMU module and the first end of the second switch module; and the second end of the second switch module is connected to the battery module. In this way, the reverse boost function of the transformer circuit can be used to construct a path for powering the interface module, ensuring the reliability of OTG power supply.

[0031] In one possible implementation, the OVP module is turned on, and the terminal device supplies power to the interface module through the first terminal of the PMU module and the OVP module. This includes: the OVP module, the first switch module, and the second switch module are all turned on; the transformer circuit boosts the battery voltage and supplies power to the interface module through the OVP module. In this way, the reverse boost function of the transformer circuit can be used to construct a power supply path to the interface module, ensuring the reliability of OTG power supply.

[0032] In one possible implementation, the wireless charging system includes a first charging channel and a second charging channel, a resonant circuit, and a rectifier module. The resonant circuit is connected to one end of the rectifier module, and the other end of the rectifier module is connected to one end of the first charging channel and one end of the second charging channel. The other end of the first charging channel serves as the first end of the wireless charging system, and the other end of the second charging channel serves as the second end of the wireless charging system. When the first device wirelessly charges the terminal device, the resonant circuit converts magnetic energy into electrical energy to obtain alternating current (AC). The rectifier module integrates the AC into direct current (DC) and supplies power to the first and second charging channels. Thus, utilizing the voltage conversion and regulation functions of the LDO charging channel, the wireless charging system, during forward wireless charging, provides the acquired voltage to the interface module after step-down and regulation, reducing the space and cost of the external transformer circuit module and ensuring the completion of the OTG function.

[0033] The first charging channel is the first LDO charging channel, and the second charging channel is the second LDO charging channel.

[0034] In one possible implementation, the LS module is turned on, and the terminal device supplies power to the interface module through the second terminal of the wireless charging system and the LS module. This includes: the second charging channel converting the DC voltage input at one end of the second charging channel into a voltage, and the output voltage at the other end of the second charging channel; when the OTG function is activated, the LS module is turned on, and the output voltage is used to supply power to the interface module. In this way, the terminal device can utilize the voltage conversion and regulation functions of the LDO charging channel. During forward wireless charging, the wireless charging system provides the acquired voltage to the interface module after step-down and regulation, reducing the space and cost of the external transformer circuit module and ensuring the completion of the OTG function.

[0035] In one possible implementation, the method further includes: upon receiving an OTG termination request, if the LS module is on, the terminal device controls the LS module to be off; if the OVP module is on, the terminal device controls the OVP module to be off. This way, when terminating the OTG function, the corresponding OTG power supply path is shut down, releasing the current circuit channel and ensuring circuit flexibility and versatility in supporting functions.

[0036] In one possible implementation, the method further includes: when the OTG function is activated, if the wireless charging system does not convert magnetic energy into electrical energy, the OVP module is turned on, and after the terminal device supplies power to the interface module through the first terminal of the PMU module and the OVP module, the terminal device detects that if the wireless charging system begins to convert magnetic energy into electrical energy, the terminal device controls the LS module to turn on, and the wireless charging system begins to supply power to the interface module through the LS module; and controls the OVP module to turn off, and the PMU module stops supplying power to the interface module through the OVP module. Thus, when the OTG function is activated, the state of the terminal device's forward wireless charging changes, and the OTG power supply path also needs to be adaptively adjusted to ensure that both forward wireless charging and OTG can be executed, ensuring that the functions do not conflict, and guaranteeing the effectiveness and rationality of the logic control.

[0037] In one possible implementation, the method further includes: when the OTG function is activated, if the wireless charging system converts magnetic energy into electrical energy, the LS module is turned on, and the terminal device supplies power to the interface module through the second terminal of the wireless charging system and the LS module; after the terminal device detects that the wireless charging system stops converting magnetic energy into electrical energy, the terminal device controls the OVP module to turn on, and the PMU module starts supplying power to the interface module through the OVP module; and controls the LS module to turn off, and the wireless charging system stops supplying power to the interface module through the LS module. Thus, when the OTG function is activated, the state of the terminal device's forward wireless charging changes, and the OTG power supply path also needs to be adaptively adjusted to ensure that both forward wireless charging and OTG can be executed, ensuring that the functions do not conflict, and guaranteeing the effectiveness and rationality of the logic control.

[0038] Fourthly, embodiments of this application provide a computer program product containing instructions that, when executed on a terminal device, cause the terminal device to perform a power supply system control method as described in the third aspect or any possible implementation thereof.

[0039] Fifthly, embodiments of this application provide a computer-readable storage medium including instructions that, when executed on a terminal device, cause the terminal device to perform a power supply system control method as described in the third aspect or any possible implementation thereof.

[0040] In a sixth aspect, embodiments of this application provide a chip system applied to a terminal device. The chip system includes one or more processors, which are used to invoke computer instructions to cause the terminal device to execute a power supply system control method as described in the third aspect or any possible implementation of the third aspect.

[0041] In a seventh aspect, embodiments of this application provide a printed circuit board (PCB) that includes a power supply system as described in the second aspect or any possible implementation of the second aspect. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the power supply system for a terminal device provided in an embodiment of this application;

[0043] Figure 2 This is a schematic diagram of the power supply system for a terminal device according to an embodiment of this application;

[0044] Figures 3A-3C This is a schematic diagram of the circuit structure of a power supply system for a terminal device according to an embodiment of this application;

[0045] Figure 4 This is an OTG power supply system control method proposed in the embodiments of this application. Detailed Implementation

[0046] The terminology used in the following embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. As used in the specification and appended claims of this application, the singular expressions “a,” “an,” “the,” “the,” “the,” and “this” are intended to include the plural expressions as well, unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in this application refers to and includes any or all possible combinations of one or more of the listed items.

[0047] The terminal device in the embodiments of this application may be a mobile phone, tablet computer, desktop computer, laptop computer, handheld computer, smart bracelet, super mobile personal computer, netbook, personal phone, personal data assistant, augmented reality (AR) / virtual reality (VR) and other touch screen devices. This application does not limit the specific form of the terminal device.

[0048] The terminal device provides features such as vibration when ringing, wireless charging, charging via a Type-C interface (interface module), and data reading via a Type-C interface (On-The-Go, OTG function, plug and play), etc.

[0049] Regarding the aforementioned functions of the terminal device, the terminal module structure of the terminal device involved in the embodiments of this application is described below. Figure 1 This is a schematic diagram of the power supply system of a terminal device disclosed by way of example in an embodiment of this application.

[0050] like Figure 1 As shown, the power supply system of the terminal device may include a type-C interface module, an overvoltage protection (OVP) module, a switching charger (SC) system, a battery module, a wireless charging system, a power management unit (PMU) module, an external transformer circuit module, and a load switch (LS) module.

[0051] The Type-C interface module connects to the OVP module via a Vbus line. The OVP module connects to the wireless charging system. The OVP module connects to one end of the charging control system via a Vbus1 line and to the PMU module via a Vbus2 line. The other end (output) of the charging control system connects to the battery module and to the Power Management Unit (PMU) module via a Vbat line. The PMU module provides main power (Vph_pwr) to other modules. The PMU connects to the external transformer circuit module via the Vph_pwr line. The external transformer circuit module connects to the wireless charging system (power port) and the load switching LS module. The load switching LS module connects to the Type-C interface module via an OTG line.

[0052] A Type-C interface module enables charging of the terminal device itself, as well as OTG functionality. OTG is a feature used to enable direct connection and communication between mobile devices. OTG can connect to other devices, such as other terminals that exchange data with the terminal. For example, an OTG module can use a Universal Serial Bus (USB) or USB Type-C interface. Mobile phones with OTG functionality can generally directly connect and use various external USB devices, such as USB flash drives, external hard drives, keyboards, mice, digital cameras, and wired headphones. Through the OTG cable, the phone can read or transfer data from these devices, perform input operations, or charge the device. During these processes, the phone needs external power, for example, a 5V power supply.

[0053] The OVP module can perform overvoltage protection, that is, when the voltage exceeds the threshold, it can stop the voltage output or input, thus protecting the circuit and preventing circuit damage caused by high voltage output.

[0054] A charging control system can be a voltage converter that transforms the input voltage into a lower output voltage. For example, with a 4:1 voltage converter, if the input voltage of the charge pump is 20V, the output voltage is 5V, a fourfold reduction. This voltage reduction by the charging control system can then be used to charge the battery module.

[0055] The battery module can store electrical energy when connected to a charger and supply power to the PMU module when not connected to a charger.

[0056] A wireless charging (RX) system converts electrical signals into magnetic signals, allowing it to charge other devices. A wireless charging system may include components such as a wireless charging (RX) chip and a coil.

[0057] The Power Management Unit (PMU) is an integrated power management unit for terminal devices, providing power at various voltage levels required by the main chip. Integrating several traditionally discrete power management chips into the PMU can achieve higher power conversion efficiency and lower power consumption. The PMU can supply power from the same source to different operating modules, such as processors, RF devices, and screens.

[0058] An external transformer module can be a boost converter module, which can boost the voltage of the main power supply Vph_pwr to the voltage required by the wireless charging system and the Type-C interface module. For example, an external transformer module can convert the 3.8V power supplied by the PMU module into a 5V output voltage.

[0059] The load switching LS module controls the supply of voltage to the Type-C interface module, ensuring the necessity and reliability of voltage supply. Specifically, when the Type-C interface module is connected to an external device and requires power, the load switching LS module controls the OTG line to conduct, initiating power supply; otherwise, the load switching LS module controls the OTG line to disconnect, preventing power supply. Optionally, the Type-C interface module can also be other types of interface modules, such as Lightning or Micro USB interfaces, etc., which are not limited in this application.

[0060] In combination with the above Figure 1 The structure of the power supply system for the terminal device is described, and the functions of charging the terminal device, powering the type-C interface module, wireless charging, and phone vibration are explained according to four current paths.

[0061] Path (1): Charge the battery module via the type-C interface module:

[0062] When the terminal device is connected to an external charger, it supplies power to the Type-C interface module (at this time, the load switching LS module must be in the off state). The Type-C interface module provides voltage to the OVP module. The OVP module, upon determining that the input voltage meets a preset voltage range (e.g., less than a certain voltage), can control the circuit to conduct, providing voltage to the charging control system via the Vbus1 line and to the PMU module via the Vbus2 line. The charging control system then converts the output voltage and charges the battery module.

[0063] In addition, the battery module supplies power to the PMU module when the terminal device is not connected to an external charger.

[0064] Path (2): Power supply to the type-C interface module in the OTG function:

[0065] When the PMU module supplies power to other modules via the Vph_pwr line (when the terminal device is powered on), it also supplies power to the external transformer circuit module via the Vph_pwr line. The external transformer circuit module then supplies voltage to the LS module after transformation. When the LS module determines that it needs to supply power to the Type-C interface module (e.g., when an external digital headset or keyboard is connected), it controls the OTG line to conduct and supplies power to the Type-C interface module.

[0066] Wireless charging paths include two scenarios: forward wireless charging and reverse wireless charging. Forward wireless charging refers to the external device charging the terminal device's own battery module and supplying power to the PMU module, etc.; reverse wireless charging is the terminal device charging the external device. The two wireless charging paths are explained below using paths (3) and (4):

[0067] Path (3): The path for forward wireless charging:

[0068] When the wireless charging system receives power, it can supply that power to the charging control system to charge the battery module. Specifically, if the output voltage of the wireless charging system meets the PMU power supply requirements, the wireless charging system can supply power to the PMU module. During this process, the OVP module is disconnected and does not supply power to the Type-C interface module. For example, the output voltage of the wireless charging system during forward charging can be in the range of 5V to 20V. Optionally, if the wireless charging system outputs 5V, it can supply power to the PMU module.

[0069] Path (4): Reverse wireless charging path:

[0070] When the PMU module supplies power to other modules via the Vph_pwr line (when the terminal device is powered on), the PMU module supplies power to the wireless charging system, providing voltage to the wireless charging system, which can then convert electrical energy into magnetic energy to charge external devices.

[0071] Path (5): Internal power supply path of the wireless charging system:

[0072] When the PMU module supplies power to other modules via the Vph_pwr line (when the terminal device is powered on), the PMU module supplies power to the external transformer circuit module via the Vph_pwr line. The external transformer circuit module can provide power to the main control chip and other devices of the wireless charging system, enabling the wireless charging system to operate normally.

[0073] In the above implementation, for the power supply path of OTG and wireless charging functions, the terminal device needs to be equipped with an external transformer circuit module to boost the main power supply voltage output by the PMU module to the voltage required by the wireless charging system and the Type-C interface module. However, the use of an external transformer circuit module will occupy space in the motherboard layout (the occupied PCB board area is large), resulting in high hardware costs.

[0074] To address the above issues, this application proposes a power supply system control method and terminal device. When the forward wireless charging function is disabled, the reverse boost path of the Buck circuit in the PMU can be set as an OTG power supply path. When the forward wireless charging function is enabled, the target voltage output by the wireless charging system can be output to the LS module, setting it as another OTG power supply path. This allows for flexible selection of the OTG power supply path for different power supply scenarios, increasing risk-free power supply control through software logic, and saving on external transformer circuit modules. This reduces hardware costs and ensures stable operation of the OTG function.

[0075] Figure 2 This is a schematic diagram of the power supply system of a terminal device disclosed exemplary in an embodiment of this application. For example... Figure 2 As shown, the terminal device may include a Type-C interface module, an OVP module, a charging control system, a battery module, a wireless charging system, a PMU module, an LS module, and an application processor (AP). One end of the AP can be connected to the control terminal of the OVP module, and the other end of the AP can be connected to the control terminal of the LS module. In this embodiment, the AP can control the on / off state of the OVP module and the LS module, thereby controlling the start and stop of the OTG power supply path. Furthermore, Figure 2 For descriptions and connection methods of other modules, please refer to [link / reference]. Figure 1 The relevant descriptions in the text will not be repeated here. It should be noted that...Figure 2 In this context, the terminal equipment does not include an external transformer circuit module.

[0076] The following is combined Figures 3A-3C Explain the power supply path within the hardware module for OTG functionality, wireless charging, and the charging process. (And combine this with...) Figure 4 Explain the control logic of terminal devices for different functional requirements in different situations.

[0077] Figures 3A-3C This is a schematic diagram of the circuit structure of a power supply system for a terminal device, as exemplarily disclosed in an embodiment of this application.

[0078] like Figures 3A-3C As shown, the terminal device may include a Type-C interface module, an overvoltage protection (OVP) module, a charging control system, a battery module, a wireless charging system, a PMU module, and a load switching (LS) module. Compared to Figure 1 With the hardware module structure in the middle, the terminal device does not need to set up a separate external transformer circuit module.

[0079] The Type-C interface module connects to the OVP module via a Vbus line. The OVP module connects to the first end of the wireless charging system. The OVP module also connects to the charging control system via a Vbus1 line and to the first end of the PMU module via a Vbus2 line. The charging control system (output end) connects to the battery module, which in turn connects to the second end of the PMU module via the power supply voltage Vbat line (where (Battery, bat) represents the power supply). The PMU module can supply power to other modules via the main power supply Vph_pwr terminal.

[0080] The OVP module may include a first switch Q1 and a second switch Q2. The drain of the first switch Q1 serves as one end of the OVP module, connected to a Type-C interface module. The source of the first switch Q1 is connected to the source of the second switch Q2. The gate of the first switch Q1 is connected to the gate of the second switch Q2. The drain of the second switch Q2 serves as the other end of the OVP module, connected to one end of the charging control system, the first end of the PMU module, and the first end of the wireless charging system. The gates of the first and second switches Q1 can serve as control terminals. When the voltage at the drain of the first switch Q1 is within a expected range (less than or equal to a certain threshold), the terminal device can control the first and second switches Q1 to turn on. When the voltage at the drain of the first switch Q1 exceeds the expected range (greater than a certain threshold), the terminal device can control the first and second switches Q1 to turn off. This prevents excessively high input voltage and avoids damage to the internal circuitry caused by high voltage.

[0081] A wireless charging system may include a resonant circuit, a wireless charging chip, and other components. Exemplarily, the wireless charging chip includes a full-bridge rectifier circuit, a first low-dropout regulator (LDO) charging channel, a second LDO charging channel, a third LDO charging channel, a main control chip, a switch (SW) module, a Q-value detection module, and a modulation module. The AC terminal of the full-bridge rectifier circuit is connected to the two input terminals of the coil module, and the DC terminal of the full-bridge rectifier circuit is connected to one end of the first LDO charging channel and the first end of the second LDO charging channel. The other end of the first LDO charging channel (serving as the first end of the wireless charging system) is connected to the other end of the OVP module, which converts the externally supplied power voltage into a 5-20V voltage for supplying to the charging control system. The second end of the second LDO charging channel is connected to one end of the third LDO charging channel, one end of the switch (SW) module, and one end of the Q-value detection module. The other end of the third LDO charging channel is connected to the main control chip. The other end of the SW module serves as the power input terminal Vdd of the wireless charging system. The control terminal of the SW module can be used as a GPIO port, controlled by the processor of the terminal device (e.g., an AP processor). When the terminal device needs to supply power to the wireless charging chip, it applies a high-voltage signal to the GPIO port, causing the SW module to conduct and begin supplying power to the Q-value detection module, as well as the second and third LDO charging channels (i.e., supplying power to the main control chip). The second and third LDO charging channels can convert 5V to 1.8V to power the main control chip. The first LDO charging channel can be used for both forward and reverse wireless charging, i.e., external power supply to the terminal device itself and the terminal device wirelessly charging other devices.

[0082] In the forward wireless charging power supply path, the second LDO charging channel performs voltage conversion, and the voltage output from the third terminal of the second LDO charging channel meets the power supply requirements of the Type-C interface module, while the output voltage conforms to the OTG power supply requirements. One end of the load switching LS module is connected to the third terminal of the second LDO charging channel in the wireless charging system, and the other end of the load switching LS module is connected to the Type-C interface module via an OTG line.

[0083] In the case of forward wireless charging, when power is supplied to the Type-C interface module via the second LDO charging channel, the second LDO charging channel acts as a step-down and voltage regulator for the input voltage at the first terminal. For example, if the output of the full-bridge rectifier circuit is in the range of 5V-20V, and the first terminal of the second LDO charging channel receives a voltage of 5V-20V, the second LDO charging channel will step down the voltage, resulting in a stable 5V output at the third terminal, with the current stable in the range of 1-1.5A. After this step-down and voltage regulation process by the second LDO charging channel, power can be supplied to the Type-C interface module via the LS.

[0084] The coil module includes a coil L1, a first capacitor C1, and a second capacitor C2. Other components may include a first resistor R1 and a filter. One end of coil L1 is connected to one end of the first capacitor C1 and one AC terminal of the full-bridge rectifier circuit. The other end of coil L1 is connected to one end of the second capacitor C2, one end of the first resistor R1, and one terminal of the filter. The other end of the second capacitor C2 is connected to the other end of C1 and the other AC terminal of the full-bridge rectifier circuit. The other end of the first resistor R1 is connected to the other end of the Q-value detection module; the other end of the filter is connected to the modulation module.

[0085] It should be noted that the wireless charging system may include more or fewer components, and this application does not limit this.

[0086] The PMU module includes a third switch Q3 and a fourth switch Q4, a Buck converter, a vibration boost converter, and a motor driver. The source of Q3 is connected to the Vbus2 line as the first terminal of the PMU, and the drain of Q3 is connected to the output of the Buck converter and grounded (GND) through the third capacitor C3. The input of the Buck converter is connected to the main power supply terminal (Vph_pwr) of the PMU module. The input of the Buck converter is also connected to the drain of the fourth switch Q4, and the source of Q4 is connected to the output of the battery module and the charging control system via the Vbat line. When the terminal device controls the gate of Q4, setting Q4 to conduct, the PMU module can supply battery power to the main power supply terminal to power other modules in the system (Q4 is generally in the conducting state). When the terminal device is connected to an external charger, it controls Q4 and Q3 to conduct, thus supplying power to the battery and the PMU module.

[0087] Optionally, Q1, Q2, Q3, and Q4 can be other types of switch modules, as long as they have the function of controlling the switch; this application is not limited to any of these. Furthermore, the types of Buck circuits and vibration boost circuits can also be replaced with other types; this application is not limited to any of these.

[0088] The aboveFigures 3A-3C In the modular structure, the number of... Figure 1 In the case of an external transformer circuit module, it is also necessary to implement OTG function, forward and reverse wireless charging function, and motor vibration function. The following will combine... Figures 3A-3C The circuit structure of the power supply circuit system is described, and the power supply paths for OTG function, wireless charging and motor vibration are explained respectively.

[0089] First, two OTG power supply paths:

[0090] First OTG power supply path: such as Figure 3A As shown, when Q3 and Q4, as well as the OVP module, are turned on, the Buck circuit boosts the voltage output by the battery module and then supplies power to the type-C interface module.

[0091] Second OTG power supply path: such as Figure 3A As shown, when the wireless charging chip is performing forward wireless charging, the second LDO charging channel can output a voltage that meets the requirements of the type-C interface module. When the load switching LS module is turned on, the voltage output by the second LDO charging channel can supply voltage to the type-C interface module.

[0092] During the actual OTG function startup process, the terminal device will only use one of the two OTG power supply paths mentioned above.

[0093] The following is combined Figure 3B and Figure 3C Explain the start-up timing of the first OTG power supply path and the second OTG power supply path.

[0094] Scenario 1: OTG power supply path during forward wireless charging startup:

[0095] like Figure 3B As shown, when forward wireless charging is initiated, the wireless charging chip supplies power to the PMU module and the charging control system through one end of the first LDO charging channel, thereby supplying power to the PMU module and charging the battery. At this time, the terminal device can control the LS module to turn on, and the wireless charging chip supplies power to the Type-C interface module through the first LDO charging channel.

[0096] Scenario 2: OTG power supply path during reverse wireless charging startup:

[0097] like Figure 3CAs shown, when reverse wireless charging is initiated, the battery module supplies power to the wireless charging system through the PMU module. At the same time, if the output voltage of the PMU at the Vbus2 port meets the OTG power supply requirements, the terminal device controls the OVP to be turned on, and the PWU module can supply power to the type-C interface module through the OVP module.

[0098] Scenario 3: OTG power supply path when wireless charging is off:

[0099] like Figure 3A As shown, when wireless charging is off (i.e., when forward and reverse wireless charging functions are off), the terminal device needs to enable the OTG function. It can directly control the OVP module to conduct and supply power to the type-C interface module through the first OTG power supply path.

[0100] The above Figures 3A-3C In the power supply system structure, the voltage provided by the vibration boost circuit varies depending on the motor vibration mode, but the voltage required by the Type-C interface module and the wireless charging system is fixed. However, the voltage is provided by only one module, the vibration boost circuit, which leads to inconsistent voltage requirements. If the OTG function and / or wireless charging function are simultaneously activated while the motor vibration function is enabled, the motor vibration mode cannot be used normally, nor can the Type-C interface module and the wireless charging system be properly powered.

[0101] In response to the above problems, Figure 4 This application provides a control method for an OTG power supply system, solving... Figures 3A-3C The OTG power supply method for different functions when they are turned on or off.

[0102] Figure 4 This application provides an exemplary embodiment of an OTG power supply system control method. The software architecture of the terminal device may include an OTG driver, and the aforementioned OTG power supply logic system method can be executed by the OTG driver. The OTG driver can be installed in the application processor (AP) of the terminal device. The OTG power supply logic system method may include, but is not limited to, the following steps:

[0103] S401: When the terminal device receives an OTG power supply start request, it determines the target OTG power supply path based on the wireless charging status, starts the target OTG power supply path, and shuts down the non-target OTG power supply path.

[0104] The target OTG power supply path includes one of a first OTG power supply path and a second OTG power supply path. The first OTG power supply path is as follows: Figure 3AIn the diagram, the power supply path to the Type-C interface module is via the Buck circuit of the PMU module and Q3 and OVP modules, i.e., power is supplied to the Type-C interface module via the Buck circuit. The second OTG power supply path is as follows: Figure 3A In this circuit, the power supply path to the type-C interface module is achieved through the resonant circuit, rectifier circuit, second LDO charging channel, and LS module of the wireless charging chip.

[0105] The forward wireless charging state includes two states: activated and deactivated. When no first device is wirelessly charging the terminal device (i.e., it is determined that the wireless charging system is not converting magnetic energy into electrical energy), the forward wireless charging state is deactivated, and the target OTG power supply path is the first OTG power supply path. When a first device is wirelessly charging the terminal device (i.e., it is determined that the wireless charging system is converting magnetic energy into electrical energy), the forward wireless charging state is activated, and the target OTG power supply path is the second OTG power supply path.

[0106] When a power-required external device is connected to the Type-C interface module (e.g., a digital headset connected to a mobile phone), the OTG driver can obtain the OTG power supply request. After obtaining the OTG power supply request, the OTG driver can determine the target OTG power supply path based on the wireless charging status and motor status, and start the target OTG power supply path. The terminal device can also turn off non-target OTG power supply paths.

[0107] In one scenario, when the first OTG power supply path is the target OTG power supply path, the AP of the terminal device can control the OVP module to turn on (activating the target OTG power supply path) and the LS module to turn off (disabling the non-target OTG power supply path). In another scenario, when the second OTG power supply path is the target OTG power supply path, the AP of the terminal device can control the LS module to turn on and the OVP module to turn off.

[0108] Optionally, after determining the target OTG power supply path, the terminal device can also activate the target OTG power supply path and deactivate non-target OTG power supply paths based on the magnitude of the power supply voltage within the target OTG power supply path. Specifically, after determining the target OTG power supply path, the AP of the terminal device can read the power supply voltage from the wireless charging chip or PMU module to the Type-C interface module via the I2C port to determine if the OTG voltage condition is met. If the OTG voltage condition is met, the target OTG power supply path is activated. If the OTG voltage condition is not met, the target OTG power supply path remains deactivated, and the power supply voltage of the target OTG power supply path continues to be monitored, and the determination of whether the OTG voltage condition is met continues. Specifically, when the target OTG power supply path is the first OTG power supply path, the power supply voltage is the voltage of the source port of Q3 of the PMU module; when the target OTG power supply path is the second OTG power supply path, the power supply voltage is the voltage of the third terminal of the second LDO charging channel of the wireless charging chip. If the power supply voltage is within a first voltage range, the OTG voltage condition is determined to be met; if the power supply voltage is not within the first voltage range, the OTG voltage condition is determined not to be met. For example... The first voltage range can be 4.5V to 5.5V. The above first voltage range is merely an example and does not constitute a limitation.

[0109] The forward wireless charging status can be obtained through the corresponding flag information. The terminal device obtains the most recent forward wireless charging flag to determine the forward wireless charging status. For example, when the forward wireless charging flag is in place, it indicates that the wireless charging status is started; when it is not in place, it indicates that the wireless charging is not started.

[0110] After receiving an OTG power supply request but before receiving an OTG power supply termination request, the terminal device needs to monitor the forward wireless charging status. If the forward wireless charging status changes, the terminal device needs to adjust the target OTG power supply path and activate the target OTG power supply path accordingly, while deactivating non-target OTG power supply paths. After receiving an OTG power supply termination request, the terminal device can deactivate the current target OTG power supply path.

[0111] For example, at time T1, the terminal device receives an OTG power supply start request, and the forward wireless charging state is not started. The first OTG power supply path is determined as the target power supply path, and the terminal device's AP can control the OVP module to turn on and the LS module to turn off. At time T2, following T1, the forward wireless charging state changes from not started to started, and the second OTG power supply path is determined as the target power supply path. The terminal device's AP can control the LS module to turn on and the OVP module to turn off. Specifically, in the case of transitioning from no forward wireless charging to starting forward wireless charging, the first LDO charging channel is turned off, the second LDO charging channel is turned on, the LS is switched to on, the OVP state changes from on to off, and then the first LDO charging channel is turned on, thus completing the switching of the OTG power supply path.

[0112] For example, at time T3, the terminal device receives an OTG power supply start request, the forward wireless charging state is started, the second OTG power supply path is determined as the target power supply path, and the terminal device's AP can control the LS module to turn on and the OVP module to turn off. At time T4, after T3, the forward wireless charging state changes from started to not started, the first OTG power supply path is determined as the target power supply path, and the terminal device's AP can control the OVP module to turn on and the LS module to turn off. Specifically, when moving from forward wireless charging to stopping forward wireless charging, the first LDO charging channel is controlled to turn off (turn off), the OVP state is switched from off to on, and the LS module is switched from on to off, thereby completing the switching of the OTG power supply path.

[0113] S402: When the terminal device receives an OTG power supply termination request, it shuts down the target OTG power supply path.

[0114] When an external device connected to the interface module is either connected or disconnected, the terminal device may not detect the external device, receive an OTG power supply termination request, and determine to shut down the OTG power supply path. Therefore, the terminal device can shut down the target OTG power supply path.

[0115] For example, when the digital headset (external device) connected to the mobile phone (terminal device) is no longer connected, the mobile phone can stop supplying power to the Type-C module. In one scenario, the target OTG power supply path is a first OTG power supply path, and the OVP module is controlled to turn off when it is powered on to supply power to the Type-C module. In another scenario, the target OTG power supply path is a second OTG power supply path, and the LS module is controlled to turn off when it is powered on to supply power to the Type-C module.

[0116] For example, at time T3 after T2, the terminal device receives an OTG power supply termination request, and the AP of the terminal device can control the LS module to shut down and the OVP module to shut down.

[0117] In the above process, when the OTG function needs to be enabled, the corresponding OTG power supply path can be selected through the forward wireless charging state. This allows for the selection of the appropriate OTG path for charging, reducing the need for external voltage conversion devices while ensuring the simplicity and reliability of the OTG function implementation.

[0118] In combination with the above Figures 3A-3C , Figure 4 The power supply control method described herein is explained separately for the control results of the terminal device selecting the OTG path under different circumstances. Table 1 is a table of control results of the terminal device selecting the OTG path and the vibration boost circuit under the same circumstances provided in the embodiments of this application. The following is a detailed explanation with reference to Table 1:

[0119] Table 1

[0120] Scenario Scenario When forward wireless charging is not started, OTG is inserted Use the first OTG power supply path. When forward wireless charging is started, OTG is inserted Use the second OTG power supply path.

[0121] The above describes the different selection and switching processes for the OTG power supply path under various circumstances. Terminal devices should flexibly switch and adjust according to Table 1 to ensure the normal operation of the OTG power supply path. Furthermore, by utilizing the reverse power supply method of the charging path, the terminal device can provide two OTG power supply paths. This reduces the need to select different OTG power supply paths when the forward wireless charging is in different states, reduces the need for external transformer circuit modules, and ensures normal OTG functionality while saving costs.

[0122] As used in the above embodiments, depending on the context, the term "when..." can be interpreted as meaning "if...", "after...", "in response to determining...", or "in response to detecting...". Similarly, depending on the context, the phrase "when determining..." or "if (the stated condition or event) is interpreted as meaning "if determining...", "in response to determining...", "when (the stated condition or event) is detected", or "in response to detecting (the stated condition or event)".

[0123] In the above embodiments, implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid-state drive), etc.

[0124] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. This program can be stored in a computer-readable storage medium, and when executed, it can include the processes described in the above method embodiments. The aforementioned storage medium includes various media capable of storing program code, such as ROM or random access memory (RAM), magnetic disks, or optical disks.

Claims

1. A terminal device, characterized in that, The terminal device includes an interface module, an overvoltage protection (OVP) module, a power management unit (PMU) module, a load switching (LS) module, and a wireless charging system; wherein: The interface module connects one end of the OVP module and one end of the LS module; the other end of the OVP module connects the first end of the PMU module and the first end of the wireless charging system; the second end of the wireless charging system connects the other end of the LS module. When the wireless charging system converts magnetic energy into electrical energy and the LS module is turned on, the wireless charging system is used to supply power to the interface module through the second terminal and the LS module.

2. The terminal device according to claim 1, characterized in that, When the OTG (On-Grid Data Exchange) function is activated, if the wireless charging system does not convert magnetic energy into electrical energy, the OVP (On-Grid Power Module) is turned on, and the terminal device supplies power to the interface module through the first terminal of the PMU (Power Module) and the OVP module; if the wireless charging system converts magnetic energy into electrical energy, the LS (Laser Module) is turned on, and the terminal device supplies power to the interface module through the second terminal of the wireless charging system and the LS module.

3. The terminal device according to claim 2, characterized in that, The terminal device also includes a battery module, and the PMU module also includes a transformer circuit, a first switch module, and a second switch module. The other end of the OVP module is connected to the first end of the PMU module, including: the other end of the OVP module is connected to the first end of the first switch module; The second terminal of the first switch module is connected to the first terminal of the transformer circuit, the second terminal of the transformer circuit is connected to the second terminal of the PMU module and the first terminal of the second switch module, and the second terminal of the second switch module is connected to the battery module.

4. The terminal device according to any one of claims 1-3, characterized in that, The wireless charging system includes a first charging channel and a second charging channel, a resonant circuit, and a rectifier module; The resonant circuit is connected to one end of the rectifier module, and the other end of the rectifier module is connected to one end of the first charging channel and one end of the second charging channel; the other end of the first charging channel serves as the first end of the wireless charging system; the other end of the second charging channel serves as the second end of the wireless charging system. When the first device wirelessly charges the terminal device, the resonant circuit converts magnetic energy into electrical energy to obtain alternating current; the rectifier module integrates the alternating current into direct current and supplies power to the first charging channel and the second charging channel.

5. The terminal device according to claim 4, characterized in that, When the LS module is turned on, the terminal device supplies power to the interface module through the second terminal of the wireless charging system and the LS module, including: The second charging channel converts the DC voltage input at one end of the second charging channel into a voltage, and the output voltage at the other end of the second charging channel; when the OTG function is activated, the LS module is turned on, and the output voltage is used to power the interface module.

6. The terminal device according to any one of claims 2-5, characterized in that, If an OTG termination request is received, and the LS module is turned on, the terminal device controls the LS module to turn off; if the OVP module is turned on, the terminal device controls the OVP module to turn off.

7. The terminal device according to any one of claims 2-6, characterized in that, When the OTG function is activated, if the wireless charging system does not convert magnetic energy into electrical energy, the OVP module is turned on. After the terminal device supplies power to the interface module through the first terminal of the PMU module and the OVP module, if the terminal device detects that the wireless charging system has started converting magnetic energy into electrical energy, the terminal device controls the LS module to turn on, and the wireless charging system starts supplying power to the interface module through the LS module; and controls the OVP module to turn off, and the PMU module stops supplying power to the interface module through the OVP module.

8. The terminal device according to any one of claims 2-6, characterized in that, When the OTG function is activated, if the wireless charging system converts magnetic energy into electrical energy, the LS module is turned on. After the terminal device supplies power to the interface module through the second terminal of the wireless charging system and the LS module, if the terminal device detects that the wireless charging system stops converting magnetic energy into electrical energy, the terminal device controls the OVP module to turn on, and the PMU module starts supplying power to the interface module through the OVP module; and controls the LS module to turn off, and the wireless charging system stops supplying power to the interface module through the LS module.

9. A power supply system, characterized in that, The power supply circuit system includes an interface module, an overvoltage protection (OVP) module, a power management unit (PMU) module, a load switching (LS) module, and a wireless charging system; wherein: The interface module connects one end of the OVP module and one end of the LS module; the other end of the OVP module connects the first end of the PMU module and the first end of the wireless charging system; the second end of the wireless charging system connects the other end of the LS module. When the wireless charging system converts magnetic energy into electrical energy and the LS module is turned on, the wireless charging system is used to supply power to the interface module through the second terminal and the LS module.

10. A power supply system control method, characterized in that, The terminal device includes an interface module, an overvoltage protection (OVP) module, a power management unit (PMU) module, a load switching (LS) module, and a wireless charging system. The interface module is connected to one end of the OVP module and one end of the LS module; the other end of the OVP module is connected to the first end of the PMU module and the first end of the wireless charging system. The second end of the wireless charging system is connected to the other end of the LS module; including: When the wireless charging system converts magnetic energy into electrical energy and the LS module is turned on, the terminal device controls the wireless charging system to supply power to the interface module through the second terminal and the LS module.

Images