WO2023001034A1

WO2023001034A1 - Discharge circuit and terminal device

Info

Publication number: WO2023001034A1
Application number: PCT/CN2022/105401
Authority: WO
Inventors: 吴水琴; 索安达杰; 黄志强; 张安祥
Original assignee: 华为技术有限公司
Priority date: 2021-07-22
Filing date: 2022-07-13
Publication date: 2023-01-26
Also published as: CN115693808A

Abstract

Provided are a discharge circuit and a terminal device, which relate to the technical field of electronics and are used to increase a charging rate when a user uses one terminal device to charge another terminal device. The discharge circuit comprises: a first voltage converter circuit (1) and a buck converter circuit (2) at least having boost functionality. A first end of the first voltage converter circuit (1) and a first end of the buck converter circuit (2) are coupled to a first node, the first node being used for coupling to a battery. A second end of the first voltage converter circuit (1) and a second end of the buck converter circuit (2) are coupled to an output interface of the discharge circuit, so that there are two discharge paths having different powers between the first node and the output interface.

Description

A discharge circuit and terminal equipment

This application claims the priority of a Chinese patent application filed with the State Intellectual Property Office on July 22, 2021, with application number 202110832130.1 and application name "A Discharge Circuit and Terminal Equipment", the entire contents of which are incorporated in this application by reference middle.

technical field

The present application relates to the field of electronic technology, in particular to a discharge circuit and terminal equipment.

Background technique

With the rapid development of electronic technology, mobile terminal devices such as laptops, tablets, and smart phones have gradually become indispensable devices in people's daily life and work, and most of these terminal devices support super fast charging technology. At present, when there is a rechargeable socket in the external environment, when the user is charging the terminal device to be charged, the corresponding charger that supports super fast charging technology can complete the charge for the terminal device to be charged in a short time. For example, if a user charges a smartphone through a 40W super fast charger, the charger can charge the smartphone at 73% @ 4200mAh within 30 minutes. When there is no rechargeable socket in the external environment or the user does not carry the corresponding charger, the user can usually charge the terminal device to be charged through a terminal device with power storage function such as a mobile power supply or a laptop computer, but in this way The charging speed and charging power of the battery are generally small. For example, if a user charges a smartphone through a laptop with a maximum charging power of 10W, the laptop can charge the smartphone at 23% @ 4200mAh within 30 minutes.

From the charging rates in the above two cases, it can be seen that charging another terminal device through one terminal device has the problems of slow charging speed and long charging time. This charging method is difficult to meet the user's needs and user experience. poor.

Contents of the invention

The present application provides a discharge circuit and a terminal device, which are used to increase the charging rate when a user charges another terminal device through one terminal device.

In order to achieve the above object, the application adopts the following technical solutions:

In the first aspect, a discharge circuit is provided, which can be applied to a terminal device. The discharge circuit has an output interface, and the output interface can be used to output a charging voltage, and the charging voltage can be used to charge an externally connected terminal device; the discharge The circuit includes: a first transformation circuit and a step-down transformation circuit having at least a boost function; wherein, the first end of the first transformation transformation circuit and the first end of the step-down transformation circuit are coupled to the first node, The first node is used for coupling with the battery, and both the second terminal of the first transformation circuit and the second terminal of the step-down conversion circuit are coupled with the output interface of the discharge circuit.

In the above technical solution, when the discharge circuit outputs the power supply voltage through the output interface, the discharge circuit can output a smaller power supply voltage (for example, 5V) to the output interface through the step-down conversion circuit, or it can pass the first The voltage transformation conversion circuit outputs a larger power supply voltage (for example, 10V) to the output interface, that is, the discharge circuit includes two discharge paths. When the terminal device connected to the output interface supports super fast charging technology, the discharge circuit A larger power supply voltage can be output to the output interface through the first voltage transformation conversion circuit, and the terminal equipment connected to the output interface can be quickly charged, so that the user can greatly increase the power consumption of the terminal equipment where the discharge circuit is located for another terminal equipment. The charging rate during charging and shortening the charging time can meet the needs of users and improve the user experience at the same time.

In a possible implementation manner of the first aspect, the discharge circuit further includes: a load switch circuit, the second terminal of the first transformation circuit and the second terminal of the step-down conversion circuit are connected to the output through the load switch circuit. Interface coupling. In the above possible implementation manner, the load switch circuit can be used to turn on the first transformer circuit to discharge the battery with high power, so that the user can greatly improve the charging efficiency when the user charges another terminal device through the terminal device where the discharge circuit is located. Speed, shorten the charging time, and thus meet the needs of users, but also improve the user experience.

In a possible implementation manner of the first aspect, the output interface includes a first interface, the load switch circuit includes a first load switch and a second load switch, and the discharge circuit further includes a first unidirectional switch; wherein, the One end of the first one-way switch, one end of the first load switch and one end of the second load switch are all coupled to the first interface, and the other end of the first one-way switch and the other end of the first load switch are both The second end of the second load switch is coupled with the second end of the step-down conversion circuit. In the above possible implementation, when the discharge circuit is used to discharge the battery, the first one-way switch is in the off state, if the first load switch is in the on state and the second load switch is in the off state, the discharge circuit can be used Because the first interface outputs a larger power supply voltage, so that the discharge circuit can support the charging of terminal equipment that meets the super fast charging technology; if the first load switch is in the off state and the second load switch is in the connected state, the discharge circuit It can be used to output a small power supply voltage through the first interface, so that the discharge circuit can satisfy the charging of a terminal device that supports low-power charging, thereby greatly improving the charging rate when the user charges another terminal device through the terminal device, and shortening the charging time. The charging time is long, which meets the needs of users and improves the user experience at the same time.

In a possible implementation manner of the first aspect, during the discharge process of the discharge circuit through the first interface, if the first discharge power of the first interface is greater than the preset power threshold, the first load switch is in the conduction state. On-state; if the first discharge power is less than or equal to the preset power threshold, the second load switch is on-state. In the above possible implementation, the discharge circuit can be used to output a relatively large charging voltage through the first interface, so that the discharge circuit can support the charging of terminal equipment that meets the super fast charging technology; or the discharge circuit can be used to pass the first interface The interface outputs a small charging voltage, so that the discharge circuit can satisfy the charging of terminal equipment that supports low-power charging, thereby further improving the flexibility and diversity of users charging another terminal equipment through this terminal equipment, and then satisfying different needs of users. Charging needs, but also improve the user experience.

In a possible implementation manner of the first aspect, the output interface further includes a second interface, the load switch circuit further includes a third load switch and a fourth load switch, and the discharge circuit further includes a second unidirectional switch; wherein One end of the second one-way switch, one end of the third load switch and one end of the fourth load switch are all coupled to the second interface, the other end of the second one-way switch and the other end of the third load switch One end is coupled to the second end of the first voltage transformation circuit, and the other end of the fourth load switch is coupled to the second end of the step-down conversion circuit. In the above possible implementation manner, the output interface of the discharge circuit may include a first interface and a second interface, and both the first interface and the second interface can be used to output a relatively large charging voltage or a relatively small charging voltage, so that the discharging circuit When charging external terminal equipment, the first interface or the second interface can be used to output a larger charging voltage; in addition, the discharge circuit can also simultaneously charge terminal equipment with different charging voltage requirements through the first interface and the second interface , thereby further improving the performance of the discharge circuit.

In a possible implementation manner of the first aspect, during the discharge process of the discharge circuit through the second interface, if the second discharge power of the second interface is greater than a preset power threshold, the third load switch is in the conduction state. On-state; if the second discharge power is less than or equal to the preset power threshold, the fourth load switch is on-state. In the above possible implementation, the discharge circuit can be used to output a relatively large charging voltage through the second interface, so as to meet the charging of terminal equipment supporting super fast charging technology, or output a small charging voltage through the second interface, so as to meet The charging of a terminal device that supports low-power charging further improves the flexibility and diversity of users charging another terminal device through this terminal device, thereby meeting different charging needs of users and improving user experience at the same time.

In a possible implementation manner of the first aspect, the load switch circuit further includes a fifth load switch and a sixth load switch, and the discharge circuit further includes a second voltage transformation circuit with a boost function; wherein, the first The first end of the second voltage transformation conversion circuit, the other end of the first load switch and the other end of the third load switch are coupled, the second end of the second voltage transformation conversion circuit, the fifth load switch One end of the sixth load switch is coupled to one end of the sixth load switch, the other end of the fifth load switch is coupled to the second end of the first transformer conversion circuit, and the other end of the sixth load switch is coupled to the first node. In the above possible implementation manner, the discharging circuit can simultaneously charge the terminal device supporting the super fast charging technology through the first interface and the second interface, thereby further improving the performance of the discharging circuit.

In a possible implementation of the first aspect, during the discharge process of the discharge circuit, if the first discharge power or the second discharge power is greater than the preset power threshold, the fifth load switch is in an off state , the sixth load switch is in a conducting state. In the above possible implementation manner, the discharging circuit can simultaneously charge the terminal device supporting the super fast charging technology through the first interface and the second interface, thereby further improving the performance of the discharging circuit.

In a possible implementation manner of the first aspect, the output interface includes a first interface, the load switch circuit includes a first load switch and a second load switch, and the discharge circuit further includes a first unidirectional switch and a boost function of the second voltage transformation conversion circuit; wherein, one end of the first one-way switch, one end of the first load switch and one end of the second load switch are all coupled to the first interface, and the other end of the first one-way switch is connected to the first The second end of the voltage transformation conversion circuit is coupled, the other end of the second load switch is coupled to the second end of the step-down conversion circuit, and the second voltage transformation conversion circuit is coupled between the other end of the first load switch and the first node. In the above possible implementation, when the discharge circuit is used to discharge the battery, the first one-way switch is in the off state, if the first load switch is in the off state and the second load switch is in the on state, the discharge circuit can be used Because a large power supply voltage is output through the first interface, the discharge circuit can support the charging of terminal equipment that meets the super fast charging technology, thereby meeting the needs of users and improving user experience at the same time.

In a possible implementation manner of the first aspect, the discharging circuit further includes a charging protocol circuit, and the charging protocol circuit is coupled to the output interface. In the foregoing possible implementation manner, the discharge circuit can perform discharge negotiation of different requirements through the charging protocol circuit, so that the discharge circuit can meet the charging of terminal devices with different charging requirements.

In a possible implementation of the first aspect, the charging protocol circuit supports one of the following charging protocols: PPS protocol, secure copy SCP fast charging protocol, fast charging QC protocol, PE fast charging protocol or VOOC flash charging protocol . The above possible implementation manners increase the flexibility and diversity of the charging protocols supported by the discharging circuit, thereby further improving the performance of the discharging circuit.

In a possible implementation manner of the first aspect, the output interface is one of the following types: a type-C interface, a type-A interface, and a Thunderbolt interface. In the above possible implementation, the discharge circuit can support different types of input interfaces or output interfaces, thereby improving the flexibility and diversity of the interface types supported by the input interface and the output interface, thereby further improving the performance of the discharge circuit. performance.

In a possible implementation manner of the first aspect, the discharge circuit further has an input interface, and the input interface and the output interface are the same interface. In the above possible implementation manner, when the input interface and the output interface are the same interface, the area of the discharge circuit can be reduced while improving the interface utilization of the discharge circuit.

In a second aspect, a chip system is provided, the chip system includes: a load, and the discharge circuit provided in the above-mentioned first aspect or any possible implementation of the first aspect; wherein, the load can be integrated with the discharge circuit together, or not integrated with the discharge circuit. Optionally, when the discharging circuit includes a battery, the battery may not be integrated with the discharging circuit.

In a third aspect, there is provided a terminal device, the terminal device includes a load, and the discharge circuit provided in the above first aspect or any possible implementation of the first aspect, the discharge circuit has an output port, and the discharge circuit can The power supply voltage is output externally through the output port.

It can be understood that any chip system and terminal device provided above include the discharge circuit provided above, therefore, the beneficial effects that it can achieve can refer to the beneficial effects in the corresponding discharge circuit provided above , which will not be repeated here.

Description of drawings

FIG. 1 is a schematic structural diagram of a terminal device provided in an embodiment of the present application;

Fig. 2 is a schematic structural diagram of a charging system provided by an embodiment of the present application;

FIG. 3 is a schematic structural diagram of a discharge circuit provided in an embodiment of the present application;

FIG. 4 is a schematic structural diagram of another discharge circuit provided in the embodiment of the present application;

FIG. 5A is a schematic structural diagram of another discharge circuit provided by the embodiment of the present application;

FIG. 5B is a schematic structural diagram of another discharge circuit provided by the embodiment of the present application;

FIG. 6 is a schematic structural diagram of another discharge circuit provided in the embodiment of the present application;

FIG. 7 is a schematic structural diagram of another discharge circuit provided in the embodiment of the present application;

FIG. 8 is a schematic structural diagram of another discharge circuit provided in the embodiment of the present application;

FIG. 9 is a schematic structural diagram of another discharge circuit provided in the embodiment of the present application;

FIG. 10 is a schematic structural diagram of another terminal device provided in an embodiment of the present application.

detailed description

In this application, "at least one" means one or more, and "multiple" means two or more. "And/or" describes the association relationship of associated objects, indicating that there may be three types of relationships, for example, A and/or B, which can mean: A exists alone, A and B exist simultaneously, and B exists alone, where A, B can be singular or plural. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one item (piece) of a, b, or c can represent: a, b, c, a and b, a and c, b and c, or a, b and c, wherein a, b, c can be single or multiple.

The embodiment of the present application uses words such as "first" and "second" to distinguish objects with similar names or functions or effects. and order of execution. The term "coupled" is used to indicate an electrical connection, including direct connection through wires or terminals or indirect connection through other devices. "Coupling" should therefore be viewed as an electronic communication connection in a broad sense.

The technical solutions provided by the embodiments of the present application can be applied to various terminal devices including discharge circuits. The terminal device may include, but is not limited to, a personal computer, a server computer, a handheld or laptop device, a mobile device (such as a notebook computer, a tablet computer, a personal digital assistant, a media player, etc.), an in-vehicle device, a consumer electronic device , minicomputers, mainframe computers, mobile robots and drones, etc. The specific structure of the terminal device will be described below.

FIG. 1 is a schematic structural diagram of a terminal device provided in an embodiment of the present application. The terminal device is described by taking a notebook computer as an example. As shown in FIG. 1 , the terminal device may include: a memory 101 , a processor 102 , a sensor component 103 , a multimedia component 104 , a power supply 105 and an input/output interface 106 .

Wherein, memory 101 can be used for storing data, software program and software module; It mainly includes storage program area and storage data area, wherein, storage program area can store operating system and at least one function required application program, such as sound playing function or image Play function, etc.; the storage data area can store data created according to the use of the electronic device, such as audio data, image data, or phone book, etc. In addition, the electronic device may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage devices.

The processor 102 is the control center of the terminal equipment, and uses various interfaces and lines to connect various parts of the entire equipment, by running or executing the software program and/or software module stored in the memory 101, and calling the stored in the memory 101 Data, perform various functions of electronic equipment and process data, so as to monitor the terminal equipment as a whole. Optionally, the processor 102 may include one or more processing units, for example, the processor 102 may include a central processing unit (central processing unit, CPU), an application processor (application processor, AP), a modem processor , graphics processing unit (graphics processing unit, GPU), image signal processor (image signal processor, ISP), controller, video codec, digital signal processor (digital signal processor, DSP), baseband processor and/or Neural-network processing unit (NPU), etc. Wherein, different processing units may be independent devices, or may be integrated in one or more processors.

The sensor component 103 includes one or more sensors, which are used to provide status assessments of various aspects for the terminal device. Wherein, the sensor component 103 may include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor or a temperature sensor, and the sensor component 103 may detect the acceleration/deceleration, orientation, opening/closing state, relative positioning or electronic Equipment temperature changes, etc. In addition, the sensor assembly 103 may also include a light sensor, such as a complementary metal oxide semiconductor (CMOS) or a charge coupled device (CCD) image sensor, for use in imaging applications, that is, a camera made of.

The multimedia component 104 provides an output interface screen between the electronic device and the user. The screen may be a touch panel, and when the screen is 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 touches, swipes, and gestures on the touch panel. The touch sensor may not only sense a boundary of a touch or swipe action, but also detect duration and pressure associated with the touch or swipe action. In addition, the multimedia component 104 also includes at least one camera, for example, the multimedia component 104 includes a front camera and/or a rear camera. When the electronic device is in an operation mode, such as a shooting mode or a video mode, the front camera and/or the rear camera can receive external multimedia data. Each front camera and rear camera can be a fixed optical lens system or have focal length and optical zoom capability.

The power supply 105 is used to provide power for each component of the terminal equipment (also referred to as the load of the terminal equipment), and the power supply 105 may include a power management system, one or more power supplies, or other components that are related to the terminal equipment to generate, manage and distribute Components associated with electricity. In the embodiment of the present application, the power supply 105 may include a power chip, which may include the discharge circuit provided herein, and may also include a battery, and the power chip may be used to provide power for various components through the discharge circuit or the battery.

The input/output interface 106 provides an interface between the processor 102 and the peripheral interface module. For example, the peripheral interface module can be a keyboard, a mouse, or a universal serial bus (universal serial bus, USB) device, etc.

Although not shown, the terminal device may also include an audio component and a communication component, etc., for example, the audio component includes a microphone, and the communication component includes a wireless fidelity (wireless fidelity, WiFi) module or a Bluetooth module, etc. Let me repeat. Those skilled in the art can understand that the structure of the terminal device shown in Figure 1 does not constitute a limitation to the terminal device, and may include more or less components than those shown in the illustration, or combine certain components, or arrange different components .

Fig. 2 is a schematic diagram of a charging system provided by an embodiment of the present application. The charging system may include a first terminal device and a second terminal device, and the first terminal device may be used to charge the second terminal device. Wherein, the first terminal device may include a discharge circuit, and when the first terminal device is connected to the second terminal device through a charging cable, the first terminal device may discharge through the discharge circuit to charge the second terminal device. Exemplarily, the discharge circuit in the first terminal device may include a one-way switch coupled in sequence, a buck-boost charging chip, and a 5V buck chip, the coupling point of the buck-boost charging chip and the 5V buck chip is connected to a battery , the output end of the 5V step-down chip can be connected to the charging control unit for controlling battery charging in the second terminal device through a 5V2A C2C charging line. In practical applications, the above-mentioned first terminal device can be a computer, notebook computer, mobile power supply or mobile phone, etc., which has the function of supplying power to its own load and charging the connected terminal device at the same time, and the second terminal device can be a mobile phone Mobile (on the go) terminal devices that can receive power from other external terminal devices, such as wearable devices, vehicle-mounted devices, U disks or hard drives. The embodiment of the present application does not limit specific forms of the first terminal device and the second terminal device.

Further, the charging system may further include a power adapter corresponding to the first terminal device, and the power adapter may also be simply referred to as a charger, and the power adapter may be a power adapter supporting super fast charging technology. The power adapter can be used to convert the AC voltage into a DC voltage and supply power to the first terminal device through the DC voltage. For example, the first terminal device includes a discharge circuit and a load, and the first terminal device is connected to the power supply through the power adapter. , the discharge circuit can be used to supply power to the load, and can also be used to charge the battery. Wherein, when the structure of the discharge circuit in the first terminal device is the structure of the discharge circuit shown in FIG. 2 , when the first terminal device is used to charge the second terminal device, there will be problems of slow charging speed and long charging time.

It should be noted that the discharge circuit provided in the embodiment of this application can supply power to the second terminal device through two paths, the first path of the two paths can supply power to the second terminal device through low-power discharge, and the second path can supply power to the second terminal device through low-power discharge. The path can supply power to the second terminal device through high-power discharge, so the first path may also be referred to as a low-power discharge path, and the second discharge path may be referred to as a high-power discharge path.

Fig. 3 is a schematic structural diagram of a discharge circuit provided by an embodiment of the present application. The discharge circuit can be applied to the terminal device provided above. The terminal device can be the first terminal device. The discharge circuit includes: at least The first variable voltage conversion circuit 1 and the step-down conversion circuit 2 of the voltage function, the first terminal of the first variable voltage conversion circuit 1 and the first end of the step-down conversion circuit 2 are coupled to the first node, and the first node is used to communicate with The battery 3 is connected, and the second end of the first transformation circuit 1 and the second end of the step-down conversion circuit 2 are both coupled to the output interface of the discharge circuit. Optionally, the discharging circuit may also include the battery 3 .

Wherein, the output interface of the discharge circuit may include one or more interfaces, and may be used to output a charging voltage, which may be used to charge the terminal device to be charged, and the output interface may be type-C (type-C, Type -C) interface, Type-A (type-A, Type-A) interface or Thunderbolt interface, etc. In FIG. 3, the output interface includes one interface as an example for illustration.

In addition, the first voltage transformation conversion circuit 1 can realize charging of different voltages, for example, the first voltage transformation conversion circuit 1 can be a boost conversion circuit, that is, the first voltage transformation conversion circuit 1 can have the function of boost charging.

Specifically, when the output interface of the discharge circuit is connected to the second terminal device through the charging line, the discharge circuit can discharge through any of the following two paths to charge the second terminal device. The first path is the battery 3—the step-down conversion circuit 2—the output port, and the second path is the battery 3—the first voltage conversion circuit 1—the output port.

That is, when charging the second terminal device through the output interface of the discharge circuit, there are two discharge paths between the battery 3 and the output port. In the first path, the electric energy in the battery 3 passes through the step-down conversion circuit 2 and is output from the output port. Since the output voltage of the step-down conversion circuit 2 is relatively small, the output voltage from the output port is relatively small, such as the output The charging voltage is 5V, and the first path can be called a low-power discharge path. In the second path, the electric energy in the battery 3 can be output from the output port after passing through the first voltage transformation conversion circuit 1. Since the first voltage transformation conversion circuit 1 can realize boosting, it can pass through the first voltage transformation conversion circuit 1 Increase the voltage output from the output port, that is, the charging voltage output from the output port is relatively large, for example, the output charging voltage is 10V, and the second path can be called a high-power discharge path. Therefore, when charging the second terminal device supporting the super fast charging technology through the discharge circuit, the second path can be selected to charge the second terminal device, which can greatly increase the charging rate and shorten the charging time, thereby satisfying the needs of users. requirements while improving the user experience.

Further, as shown in FIG. 4 , the discharge circuit may also include: a load switch (load switch) circuit 4, the second end of the first transformer conversion circuit 1 and the second end of the step-down conversion circuit 2 pass through the load switch Circuit 4 is coupled to the output interface. In a possible example, the load switch circuit 4 has three terminals and are respectively represented as a first terminal a, a second terminal b and a third terminal c, the first terminal a of the load switch circuit 4 Coupled with the second end of the first voltage transformation conversion circuit 1, the second end b of the load switch circuit 4 is coupled with the second end of the step-down conversion circuit 2, and the third end c of the load switch circuit 4 is connected to the output interface coupling. When the battery 3 is discharged through the discharge circuit, if the first terminal a and the third terminal c of the load switch circuit 4 are turned on, the discharge circuit can discharge the battery 3 with high power by the first transformer conversion circuit 1, If the second terminal b and the third terminal c of the load switch circuit 4 are turned on, the discharge circuit can discharge the battery 3 with a low power by the step-down conversion circuit 2 .

Optionally, the discharge circuit can also have a charging function, that is, it can charge the battery 3 . At this time, the discharge circuit also has an input interface, and the discharge circuit may also include a one-way switch circuit 5, one end of the one-way switch circuit 5 is coupled to the input interface of the discharge circuit, and the other end of the one-way switch circuit 5 is connected to the first The second end of the voltage transformation conversion circuit 1 is coupled to the second end of the buck conversion circuit 2 .

Wherein, the input interface of the discharge circuit can be used to receive an input voltage, for example, the input voltage can be provided by a power adapter. The input interface and the output interface may share the same one or more interfaces, or may respectively include one or more different interfaces.

In addition, the interface types of the input interface and the output interface may be the same. For example, the input interface and the output interface may all be Type-C interfaces, Type-A interfaces, or Thunderbolt interfaces, etc., which are not specifically limited in this embodiment of the present application.

When the discharge circuit also has the function of charging the battery 3 , the discharge circuit can charge the battery 3 through the first transformer circuit 1 . Correspondingly, during the discharge process of the discharge circuit, the discharge circuit can discharge the battery 3 through the first transformer circuit 1; or, the discharge circuit also includes a second transformer circuit 6, and the discharge circuit passes the second The voltage transformation conversion circuit 6 discharges the battery 3 . The two situations are described below.

In the first case, the discharge circuit charges the battery 3 through the first voltage transformation and conversion circuit 1 , and simultaneously uses the first voltage transformation and conversion circuit 1 to discharge the battery 3 .

Exemplarily, as shown in FIG. 5A , one end of the one-way switch circuit 5 is coupled to the input interface of the discharge circuit, and the other end of the one-way switch circuit 5 is connected to the second end of the first transformer conversion circuit 1 and the load switch circuit The first end a of 4 is coupled, the first end of the first transformation circuit 1 and the first end of the step-down conversion circuit 2 are coupled to the first node, the second end of the step-down conversion circuit 2 is connected to the load switch circuit 4 The second terminal b is coupled, the third terminal c of the load switch circuit 4 is coupled to the output interface of the discharge circuit, and the battery 3 may also be coupled between the first node and the ground terminal GND.

Wherein, the unidirectional switch circuit 5 may be an over voltage protection (over voltage protection, OVP) device. The first voltage transformation conversion circuit 1 may include a buck-boost charging management chip, which can realize step-down charging and boost charging, and can also realize charging control, for example, according to the battery voltage. Trickle charging, constant current fast charging (CC charging) and constant voltage charging (CV charging) control, etc., to provide high-precision charging voltage and charging current. The buck-boost charge management chip can also support a wider working voltage range, for example, the working voltage range can be 2.7V-3.6V. The step-down converting circuit 2 may be a 5V step-down (buck) chip, and the output voltage of the 5V step-down chip is 5V. The load switch circuit 4 can be a large current protection switch chip, which is used to isolate other charging and discharging paths.

Specifically, when the input interface of the discharge circuit is connected to the power adapter and receives the input voltage, the one-way switch circuit 5 is connected (or conducted), the load switch circuit 4 is disconnected (or turned off), and the input voltage is sequentially Charge the battery 3 after passing through the one-way switch circuit 5 and the first voltage transformation conversion circuit 1, that is, the charging path for charging the battery 3 is: the input interface—the one-way switch circuit 5—the first voltage transformation conversion circuit 1 - battery3. When the output interface of the discharge circuit is connected to the second terminal device through the charging line, the discharge circuit can discharge through any one of the following two paths to charge the second terminal device. The first path is the battery 3-down Voltage conversion circuit 2—load switch circuit 4 (the second terminal b is connected to the third terminal c)—the output port, and the second path is battery 3—the first transformer conversion circuit 1—load switch circuit 4 (the first Terminal a is connected to the third terminal c)—the output port.

In the second case, the discharge circuit also includes a second voltage conversion circuit 6 with a boost function, the discharge circuit charges the battery 3 through the first voltage conversion circuit 1, and charges the battery 3 through the second voltage conversion circuit 6. discharge.

Exemplarily, as shown in FIG. 5B, one end of the unidirectional switch circuit 5 is coupled to the input interface of the discharge circuit, and the other end of the unidirectional switch circuit 5 is coupled to the second end of the first transformer circuit 1. The first The first end of the voltage transformation conversion circuit 1, the first end of the step-down conversion circuit 2 and the first end of the second voltage transformation conversion circuit 6 are all coupled to the first node, and the second end of the second voltage transformation conversion circuit 6 is connected to the first node. The first end a of the load switch circuit 4 is coupled, the second end of the step-down conversion circuit 2 is coupled to the second end b of the load switch circuit 4, the third end c of the load switch circuit 4 is coupled to the output interface of the discharge circuit, A battery 3 may also be coupled between the first node and the ground terminal GND. In FIG. 5B , the input interface and the output interface of the discharge circuit are different interfaces and each includes an interface as an example for illustration.

Specifically, when the input interface of the discharge circuit is connected to the power adapter and receives the input voltage, the one-way switch circuit 5 is connected (or conducted), the load switch circuit 4 is disconnected (or turned off), and the input voltage is sequentially Charge the battery 3 after passing through the one-way switch circuit 5 and the first voltage transformation conversion circuit 1, that is, the charging path for charging the battery 3 is: the input interface—the one-way switch circuit 5—the first voltage transformation conversion circuit 1 - battery3. When the output interface of the discharge circuit is connected to the second terminal device through the charging line, the discharge circuit can discharge through any one of the following two paths to charge the second terminal device. The first path is the battery 3-down Voltage conversion circuit 2—load switch circuit 4 (the second end b is connected to the third end c)—the output port, and the second path is battery 3—the second voltage transformation circuit 6—load switch circuit 4 (the first Terminal a is connected to the third terminal c)—the output port.

Further, the discharging circuit may also include a charging protocol circuit 7, which may be used for power negotiation during the high-power charging process. The charging protocol circuit 7 can be coupled with the input interface and the output interface at the same time, wherein the charging protocol circuit 7 can be coupled with the input interface for power negotiation during the charging process of the discharging circuit, and the charging protocol circuit 7 and the The output interface coupling can be used for power negotiation during the discharge process of the discharge circuit. Optionally, the charging protocol circuit 7 is coupled to the output interface, and can also be used to detect whether the second terminal device connected to the output interface supports high-power charging or supports low-power charging.

Optionally, the charging protocol supported by the charging protocol circuit 7 may be one of the following charging protocols: programmable power supply (programmable power supply, PPS) protocol, secure copy (secure copy, SCP) fast charging protocol, fast charging ( quick charge, QC) protocol, high-speed pump (pump express, PE) fast charge protocol or VOOC flash charge protocol. In practical applications, the charging protocol circuit 7 may be a charging protocol chip, for example, the charging protocol circuit 7 may be a power delivery (PD) chip.

Specifically, during the discharging process of the discharging circuit, the charging protocol circuit 7 can be used to determine whether the device connected to the output port needs to be charged with high power or needs to be charged with low power. For example, the charging protocol circuit 7 is a PD chip and supports the PPS protocol, and the device connected to the output port also supports the PPS protocol. When the charging protocol circuit 7 detects that the connected device supports the PPS protocol through the charging line, it can determine that the connected device supports the PPS protocol. The device needs to be charged with high power. If it is detected that the connected device does not support the PPS protocol, it can be determined that the connected device needs to be charged with low power. Whether the device connected to the output port needs to be charged with high power can be used to support the discharge circuit to select the corresponding path of the above two paths for discharging, so as to charge the connected device with corresponding power. Exemplarily, the above-mentioned high-power charging device can be a device with a charging voltage greater than 5V, such as a mobile phone or a tablet computer, for example, the charging voltage can be 10V or 20V; the above-mentioned low-power charging device can be a USB flash drive, a hard disk, or a digital headset, etc. Devices whose charging voltage does not exceed 5V, for example, the charging voltage can be 3V or 5V.

In a possible embodiment, the first voltage transformation conversion circuit 1, the step-down conversion circuit 2, the load switch circuit 4, the one-way switch circuit 5, the second voltage transformation conversion circuit 6 and the charging protocol circuit 7 are all connected with the processing Coupled with a processor, the processor can be used to communicate with or control the above-mentioned circuits. In practical applications, the processor can be integrated in a system on chip (SoC).

In one example, when the charging protocol circuit 7 detects that the device connected to the output interface needs to be charged with high power, the charging protocol circuit 7 can send a first message indicating that a high-power discharge needs to be performed to the processor. Instruction information, when the processor receives the first instruction information, the processor can control the switching circuit in the high-power discharge path described above to be turned on, and control the first transformation circuit 1 or the second transformation circuit 1 The conversion circuit 6 performs step-up conversion and the like.

In another example, when the charging protocol circuit 7 detects that the device connected to the output interface needs to be charged with low power, the charging protocol circuit 7 can send the first message indicating that low-power discharge needs to be performed to the processor. Two instruction information, when the processor receives the second instruction information, the processor can control the switching circuit in the low-power discharge path described above to turn on, and control the step-down conversion circuit 2 to perform step-down conversion, etc.

In another example, when the input interface and the output interface of the discharge circuit are the same interface, if the interface is connected with a device, the processor can also detect the voltage of the interface, and according to the voltage is high Or it is determined that the device connected to the interface is a power adapter or a device to be charged at a low level.

Further, the output port of the discharge circuit may include one port, or may include multiple ports, and when the number of output ports included in the discharge circuit is different, the structure of the discharge circuit will also be different. The following uses the The output port of the discharge circuit includes one port and two ports as an example, and the structure and corresponding working process of the discharge circuit will be described in detail.

First, the output port of the discharge circuit includes one port. The discharge circuit charges the battery 3 through the first voltage transformation circuit 1 and discharges the battery 3 through the first voltage transformation circuit 1 . Exemplarily, as shown in FIG. 6, the output interface may include a first interface P1, and the first interface P1 may also be used as an input interface of the discharge circuit. The one-way switch circuit 5 includes a first one-way switch OVP1, and the load switch circuit 4 includes a first load switch LS1 and a second load switch LS2. Wherein, one end of the first one-way switch OVP1, one end of the first load switch LS1 and one end of the second load switch LS2 are all coupled to the first interface P1, the other end of the first one-way switch OVP1, the first end of the load switch LS1 The other end is coupled to the second end of the first voltage transformation conversion circuit 1, the other end of the second load switch LS2 is coupled to the second end of the step-down conversion circuit 2, and the first end of the first voltage transformation conversion circuit 1 is connected to the step-down conversion circuit 1. The first end of the conversion circuit 2 is coupled to the first node, and the battery 3 is coupled between the first node and the ground terminal GND. The first node can also be used to output the working voltage V _SYS of the first terminal device, and the charging protocol circuit 7 Coupled with the first interface P1.

Specifically, when the first interface P1 of the discharge circuit is connected to the power adapter and receives an input voltage, the first one-way switch OVP1 is connected, the first load switch LS1 and the second load switch LS2 are both turned off, and the input voltage is The charging path for charging the battery 3 is: the first interface P1 - the first one-way switch OVP1 - the first voltage transformation circuit 1 - the battery 3 . When discharging through the first interface P1 of the discharging circuit to charge an externally connected device, the first one-way switch OVP1 is turned off, and discharge is carried out through any one of the two paths similar to those described above. Further, if the first discharge power of the first interface P1 is less than the preset power threshold, it can be discharged through the first path, and the first path is specifically the battery 3—the step-down conversion circuit 2—the second load switch LS2 (connected )—the first interface P1; if the first discharge power of the first interface P1 is greater than or equal to the preset power threshold, it can be discharged through the second path, and the second path is specifically the battery 3—the first transformer conversion circuit 1 - First load switch LS1 (connected) - First interface P1.

It should be noted that the first discharge power of the first interface P1 can be the product of the discharge voltage and the discharge current of the first interface P1, and the preset power threshold can be set in advance according to actual needs or industry regulations, for example, the preset The power threshold may be 20W, which is not specifically limited in this embodiment of the present application.

In the second type, the output port of the discharge circuit includes two ports. The discharge circuit charges the battery 3 through the first voltage transformation circuit 1 and discharges the battery 3 through the first voltage transformation circuit 1 . Exemplarily, as shown in FIG. 7, the output interface may include a first interface P1 and a second interface P2, the first interface P1 and the second interface P2 may also serve as input ports of the discharge circuit, and the unidirectional switch circuit 5 includes The first unidirectional switch OVP1 and the second unidirectional switch OVP2 , the load switch circuit 4 includes a first load switch LS1 , a second load switch LS2 , a third load switch LS3 and a fourth load switch LS4 . Wherein, one end of the first one-way switch OVP1, one end of the first load switch LS1 and one end of the second load switch LS2 are all coupled to the first interface P1, one end of the second one-way switch OVP2, one end of the third load switch LS3 and one end of the fourth load switch LS4 are coupled with the second interface P2, the other end of the first unidirectional switch OVP1, the other end of the second unidirectional switch OVP2, the other end of the first load switch LS1, the third load switch LS3 The other end of the second load switch LS2 and the other end of the fourth load switch LS4 are coupled with the second end of the step-down conversion circuit 2, the first transformer Both the first end of the conversion circuit 1 and the first end of the step-down conversion circuit 2 are coupled to the first node, and a battery 3 is coupled between the first node and the ground terminal GND, and the first node can also be used to output the first terminal device working voltage V _SYS , the charging protocol circuit 7 is coupled to the first interface P1 and the second interface P2 respectively.

Specifically, when charging the battery 3 through the discharge circuit, the battery 3 can be charged not only through the first interface P1, but also through the second interface P2. Wherein, when the battery 3 is charged through the first interface P1, that is, when the first interface is connected to the power adapter and receives an input voltage, the first one-way switch OVP1 is turned on, the second one-way switch OVP2 is turned off, and the first load switch LS1 to the fourth load switch LS4 can all be turned off, and the charging path for charging the battery 3 with the input voltage is: the first interface P1—the first one-way switch OVP1—the first transformer circuit 1—the battery 3 . Similarly, when the battery 3 is charged through the second interface P2, that is, when the second interface P2 is connected to the power adapter and receives an input voltage, the second one-way switch OVP2 is turned on, the first one-way switch OVP1 is turned off, and the first one-way switch OVP1 is turned off. The load switch LS1 to the fourth load switch LS4 can all be turned off, and the charging path for the battery 3 to be charged by the input voltage is: the second interface P1—the second unidirectional switch OVP2—the first transformer circuit 1—the battery 3 .

When discharging the battery 3 through the discharging circuit to charge the externally connected device, it can not only discharge through the first interface P1, but also discharge through the second interface P2, and for any of the first interface P1 and the second interface One interface can be discharged through similar to the above two paths.

Among them, for the first interface P1, if the first discharge power of the first interface P1 is less than the preset power threshold, it can be discharged through the first path, and the first path is specifically the battery 3—the step-down conversion circuit 2—the second Load switch LS2 (communication)—the first interface P1; if the first discharge power of the first interface P1 is greater than or equal to the preset power threshold, it can be discharged through the second path, and the second path is specifically battery 3—the first Transformer circuit 1—first load switch LS1 (connected)—first interface P1.

For the second interface P2, if the second discharge power of the second interface P2 is less than the preset power threshold, it can be discharged through the first path, and the first path is specifically battery 3—step-down conversion circuit 2—fourth load switch LS4 (communication)—the second interface P2; if the second discharge power of the second interface P2 is greater than or equal to the preset power threshold, it can be discharged through the second path, and the second path is specifically the battery 3—the first transformer Conversion circuit 1—third load switch LS3 (connected)—second interface P2.

Exemplarily, Table 1 is used below to illustrate corresponding working processes in possible working scenarios of the discharge circuit.

Table 1

It should be noted that the discharge circuit shown in Figure 7 above can perform high-power discharge through the first interface P1 or the second interface P2 in the non-charging scenario, and can perform low-power discharge at the same time during the charging process, but cannot During the charging process, high-power discharge is carried out at the same time.

In practical applications, for the first interface P1 and the second interface P2, one of the two interfaces can be set as a high-power discharge interface (that is, a path connected to the high-power discharge corresponding to the interface), as shown in Table 1 above It is assumed that the first interface P1 is a high-power discharge interface. In addition, as can be seen from the above table 1, in the process of charging the battery 3 through the discharge circuit, the interface with a large charging power among the first interface P1 and the second interface P2 can be selected to charge the battery 3; During the discharge process of the battery 3, if the first interface P1 and the second interface P2 are not used at the same time or are used for discharging at the same time, when high-power discharge is required, the second path of the first interface P1 can be selected for discharge. When low-power discharge is required, the first path of the second interface P2 can be selected for discharging; if one of the first interface P1 and the second interface P2 is used for charging and the other is used for discharging, the interface used for discharging can pass through The path corresponding to the low power discharge is discharged.

In the discharge circuit provided in Figure 6 and Figure 7 above, when the second terminal device is charged through the discharge circuit, if the second terminal device does not support the super fast charging technology, it can be charged through the small interface of the corresponding interface described above. The first path of power discharge charges the second terminal device. If the second terminal device supports super fast charging technology, it can charge the second terminal device through the second path of high-power discharge of the corresponding interface described above. , so that the discharge circuit can realize high-power charging for externally connected devices without affecting the existing charging and discharging functions. Therefore, the discharging circuit can meet user's demands for different charging powers.

Third, the output port of the discharge circuit includes a port, and the discharge circuit also includes a second voltage conversion circuit 6, the discharge circuit charges the battery 3 through the first voltage conversion circuit 1, and charges the battery 3 through the second voltage conversion circuit 6. 6 Discharge the battery 3 . Exemplarily, as shown in FIG. 8, the output interface may include a first interface P1, and the first interface P1 may also be used as an input interface of the discharge circuit. The one-way switch circuit 5 includes a first one-way switch OVP1, and the load switch circuit 4 includes a first load switch LS1 and a second load switch LS2. Wherein, one end of the first unidirectional switch OVP1, one end of the first load switch LS1 and one end of the second load switch LS2 are all coupled to the first interface P1, and the other end of the first unidirectional switch OVP1 is connected to the first voltage transformation conversion circuit 1, the other end of the first load switch LS1 is coupled to the first end of the second transformation circuit 6, the first end of the first transformation circuit 1, the first end of the second transformation circuit 6 Both terminals and the first end of the step-down conversion circuit 2 are coupled to the first node, the second end of the step-down conversion circuit 2 is coupled to the other end of the second load switch LS2, and the first node is coupled to the ground terminal GND. The first node of the battery 3 can also be used to output the operating voltage V _SYS of the first terminal device, and the charging protocol circuit 7 is coupled to the first interface P1.

Specifically, when the first interface P1 of the discharge circuit is connected to the power adapter and receives an input voltage, the first one-way switch OVP1 is connected, the first load switch LS1 and the second load switch LS2 are both turned off, and the input voltage is The charging path for charging the battery 3 is: the first interface P1 - the first one-way switch OVP1 - the first voltage transformation circuit 1 - the battery 3 . When discharging through the first interface P1 of the discharging circuit to charge an externally connected device, the first one-way switch OVP1 is turned off, and discharge is carried out through any one of the two paths similar to those described above. Further, if the first discharge power of the first interface P1 is less than the preset power threshold, it can be discharged through the first path, and the first path is specifically the battery 3—the step-down conversion circuit 2—the second load switch LS2 (connected )—the first interface P1; if the first discharge power of the first interface P1 is greater than or equal to the preset power threshold, it can be discharged through the second path, and the second path is specifically the battery 3—the second transformation circuit 6 - First load switch LS1 (connected) - First interface P1.

Fourth, the output port of the discharge circuit includes two ports, and the discharge circuit also includes a second voltage conversion circuit 6. The discharge circuit charges the battery 3 through the first voltage conversion circuit 1, and converts the battery 3 through the second voltage conversion circuit 6. Circuit 6 discharges battery 3 . Exemplarily, referring to FIG. 7, as shown in FIG. 9, the output interface may include a first interface P1 and a second interface P2, and the first interface P1 and the second interface P2 may also serve as input ports of the discharge circuit, and the load The switch circuit 4 also includes a fifth load switch LS5 and a sixth load switch LS6. Wherein, the first end of the second voltage transformation conversion circuit 6, the other end of the first load switch LS1 and the other end of the second load switch LS2 are coupled, the second end of the second voltage transformation conversion circuit 6, the second One end of the fifth load switch LS5 is coupled to one end of the sixth load switch LS6, the other end of the fifth load switch LS5 is coupled to the second end of the first transformation circuit 1, and the other end of the sixth load switch LS6 is coupled to the first node. The difference between the discharge circuit shown in FIG. 9 and the discharge circuit shown in FIG. 7 above is that the discharge circuit shown in FIG. 9 can perform high-power discharge simultaneously during the charging process of the discharge circuit. The charging and discharging process of the discharging circuit shown in FIG. 9 will be described in detail below.

Specifically, when the battery 3 is charged through the first interface P1 or the second interface P2 of the discharge circuit, that is, when the first interface P1 or the second interface P2 of the discharge circuit is connected to the power adapter and receives an input voltage, the The charging path of the discharge circuit is consistent with the charging path described in FIG. 7 above, that is, the charging path when charging the battery 3 through the first interface P1 is the first interface P1—the first one-way switch OVP1—the first voltage conversion circuit 1—the battery 3, the charging path when charging the battery 3 through the second interface P2 is the second interface P2—the second one-way switch OVP2—the first voltage transformation circuit 1—the battery 3 .

When the battery 3 is discharged through the first interface P1 or the second interface P2 of the discharge circuit to charge an externally connected device, each interface corresponds to two paths for discharging. Wherein, when the battery 3 is discharged through the first interface P1 of the discharge circuit, if the first discharge power of the first interface P1 is less than the preset power threshold, it can be discharged through the first path, and the first path is specifically Battery 3—step-down conversion circuit 2—second load switch LS2 (connected)—first interface P1; if the first discharge power of the first interface P1 is greater than or equal to the preset power threshold, it can be discharged through the second path, The second path is specifically the battery 3 - the sixth load switch LS6 (connected) - the second transformer circuit 6 - the first load switch LS1 (connected) - the first interface P1. When the battery 3 is discharged through the second interface P2 of the discharge circuit, if the second discharge power of the second interface P2 is less than the preset power threshold, it can be discharged through the first path, and the first path is specifically the battery 3 - step-down conversion circuit 2 - fourth load switch LS4 (connected) - second interface P2; if the second discharge power of the second interface P2 is greater than or equal to the preset power threshold, it can discharge through the second path, and the second The first path is specifically the battery 3—the sixth load switch LS6 (connected)—the second transformer circuit 6—the third load switch LS3 (connected)—the second interface P2.

When the battery 3 is charged through the first interface P1 of the discharge circuit, and at the same time, the externally connected device is charged with high power through the second interface P2, the charging path corresponding to the first interface P1 is the first interface P1-first One-way switch OVP1—the first transformer circuit 1—battery 3, and the path for external high-power charging corresponding to the second interface P2 is the first interface P1—the first one-way switch OVP1—the fifth load switch LS5 (connected) - the second transformer circuit 6 - the third load switch LS3 (connected) - the second interface P2.

When the battery 3 is charged through the second interface P2 of the discharge circuit, and at the same time, the externally connected device is charged with high power through the first interface P1, the charging path corresponding to the second interface P2 is the second interface P2-second One-way switch OVP2—the first transformer conversion circuit 1—battery 3, and the path for external high-power charging corresponding to the first interface P1 is the second interface P2—the second one-way switch OVP2—the fifth load switch LS5 (connected) —Second voltage transformation conversion circuit 6 —First load switch LS1 (connected)—First interface P1.

Exemplarily, Table 2 is used below to illustrate corresponding working processes in possible working scenarios of the discharge circuit.

Table 2

In the discharge circuit provided in FIG. 9 above, in the scenario where the battery 3 is not charged, the battery 3 can be discharged with high power through the first interface P1 or the second interface P2, that is, in this scenario, the externally connected The device performs high-power charging. In the scenario of charging the battery 3 through one of the first interface P1 or the second interface P2, a part of the power output by the power adapter can be charged to the battery 3 after passing through the first transformer conversion circuit 1, and the other part can be charged at the same time. The power passes through the fifth load switch LS5 and the second voltage transformation conversion circuit 6 and then is output through another interface to charge externally connected devices with high power. Therefore, when charging the second terminal device supporting super fast charging technology through the discharge circuit, not only can the second terminal device be charged with high power when the discharge circuit is not charging, but also can be charged when the discharge circuit is in In the charging scene, the second terminal device is charged with high power, thereby greatly improving the charging rate of the second terminal device and shortening the charging time, thus meeting the needs of users and improving user experience. In addition, all the power outputted by the power adapter is only converted by the first transformer circuit 1 and the second transformer circuit 6, that is, the total power of the first transformer circuit 1 and the second transformer circuit 6 is equal to the power supply The full power output by the adapter can reduce heat loss and avoid overheating of the first terminal device to which the discharge circuit is applied.

Based on this, an embodiment of the present application further provides a system-on-a-chip, where the system-on-a-chip includes any one of the discharge circuits provided above. Optionally, the system-on-a-chip may include multiple chips, and each of the multiple chips may be used to integrate one device or multiple devices in the discharge circuit provided above. For example, the above-mentioned first voltage transformation conversion circuit 1 and the second voltage transformation conversion circuit 6 can be two buck-boost conversion chips, and each load switch in the first load switch LS1 to the fourth load switch LS4 can be a load switch chip, the step-down conversion circuit 2 may be a step-down conversion chip. It should be noted that, the above detailed description about the discharge circuit can be referred to the related description of the system-on-a-chip, and will not be repeated in this embodiment of the present application.

In another aspect of the present application, a terminal device is also provided, and the terminal device may be a notebook computer, a tablet computer, a palmtop computer, a computer, or a mobile phone. Exemplarily, as shown in FIG. 10 , the terminal device includes: a processor 301 , a memory 302 , a communication interface 303 , a bus 304 and a discharge circuit 305 . Processor 301 , memory 302 , communication interface 303 and discharge circuit 305 are connected through bus 304 . The discharge circuit 305 may include a battery or be coupled to a battery, and the discharge circuit 305 may be used to supply power to the processor 301 , the memory 302 and the communication interface 304 .

It should be noted that the discharge circuit 305 in the terminal device can be any one of the discharge circuits provided above. For the relevant description of the discharge circuit 305, refer to the relevant description of the discharge circuit provided above. Examples will not be repeated here.

Wherein, the processor 301 may be a central processing unit, a general processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It can implement or execute the various illustrative logical blocks, modules and circuits described in connection with the present disclosure. The processor 301 may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a digital signal processor and a microprocessor, and the like.

The memory 302 can be used to store data, software programs and modules, and mainly includes a program storage area and a data storage area. The program storage area can store the operating system, at least one application program required by a function, etc., and the data storage area can store the time when the terminal is in use. created data, etc. The processor 302 is used to control and manage the actions of the terminal, such as by running or executing software programs and/or modules stored in the memory, and calling data stored in the memory to execute various functions of the terminal and process data . The communication interface 303 is used to support the terminal device to communicate.

The bus 304 may be a peripheral component interconnect standard (peripheral component interconnect, PCI) bus or an extended industry standard architecture (extended industry standard architecture, EISA) bus or the like. The bus can be divided into address bus, data bus, control bus and so on. For ease of representation, only one thick line is used in FIG. 10 , but it does not mean that there is only one bus or one type of bus.

Further, the terminal device may further include one or more of multiple components such as a multimedia component, a sensor component, and an audio circuit, which will not be repeated in this embodiment of the present application.

In the terminal device provided in the embodiment of the present application, the terminal device includes the discharge circuit provided above, and the discharge circuit can be used for low-power charging for externally connected devices, and can also be used for high-power charging for externally connected devices. Charging, so that the charging rate can be greatly increased and the charging time can be shortened during high-power charging, thereby meeting the user's needs for different charging power, and improving the user experience at the same time.

In the several embodiments provided in this application, it should be understood that the above-described discharge circuit, chip system and terminal equipment are only illustrative, for example, the division of modules or units is only a logical function Division, in actual implementation, there may be other division methods, for example, multiple units or components may be combined or integrated into another device, or some features may be omitted or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, devices or units.

The unit described as a separate component may or may not be physically separated, and the component displayed as a unit may be one physical unit or multiple physical units, that is, it may be located in one place, or may be distributed to multiple different places . Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above integrated units may be implemented in the form of hardware.

Finally, it should be noted that: the above is only a specific implementation of the application, but the scope of protection of the application is not limited thereto, and any changes or replacements within the technical scope disclosed in the application shall be covered by this application. within the scope of the application. Therefore, the protection scope of the present application should be determined by the protection scope of the claims.

Claims

A discharge circuit, characterized in that the discharge circuit includes: a first voltage-transforming conversion circuit and a step-down conversion circuit having at least a voltage boosting function;

Wherein, the first end of the first voltage transformation conversion circuit and the first end of the step-down conversion circuit are coupled to a first node, and the first node is used for coupling with a battery, and the first voltage transformation conversion circuit The second end of the step-down conversion circuit and the second end of the step-down conversion circuit are coupled to the output interface of the discharge circuit.
The discharge circuit according to claim 1, characterized in that, the discharge circuit further comprises: a load switch circuit, the second terminal of the first voltage transformation conversion circuit, the second terminal of the step-down conversion circuit The two terminals are coupled to the output interface through the load switch circuit.
The discharge circuit according to claim 2, wherein the output interface comprises a first interface, the load switch circuit comprises a first load switch and a second load switch, and the discharge circuit further comprises a first one-way switch ;

Wherein, one end of the first unidirectional switch, one end of the first load switch, and one end of the second load switch are all coupled to the first interface, and the other end of the first unidirectional switch is connected to the The other end of the first load switch is coupled to the second end of the first transformer circuit, and the other end of the second load switch is coupled to the second end of the step-down conversion circuit.
The discharge circuit according to claim 3, characterized in that, during the discharge process of the discharge circuit through the first interface,

If the first discharge power of the first interface is greater than a preset power threshold, the first load switch is in an on state;

If the first discharge power is less than or equal to the preset power threshold, the second load switch is turned on.
The discharge circuit according to claim 3 or 4, wherein the output interface further comprises a second interface, the load switch circuit further comprises a third load switch and a fourth load switch, and the discharge circuit further comprises a first Two one-way switches;

Wherein, one end of the second unidirectional switch, one end of the third load switch, and one end of the fourth load switch are all coupled to the second interface, and the other end of the second unidirectional switch is connected to the The other end of the third load switch is coupled to the second end of the first transformer conversion circuit, and the other end of the fourth load switch is coupled to the second end of the step-down conversion circuit.
The discharge circuit according to claim 5, characterized in that, during the discharge process of the discharge circuit through the second interface,

If the second discharge power of the second interface is greater than a preset power threshold, the third load switch is in an on state;

If the second discharge power is less than or equal to the preset power threshold, the fourth load switch is turned on.
The discharge circuit according to claim 5 or 6, wherein the load switch circuit further comprises a fifth load switch and a sixth load switch, and the discharge circuit further comprises a second voltage-transforming circuit with boost function ;

Wherein, the first end of the second voltage transformation conversion circuit, the other end of the first load switch and the other end of the third load switch are coupled, and the first end of the second voltage transformation conversion circuit Two terminals, one terminal of the fifth load switch and one terminal of the sixth load switch are coupled, the other terminal of the fifth load switch is coupled with the second terminal of the first voltage transformation conversion circuit, the The other end of the sixth load switch is coupled to the first node.
The discharge circuit according to claim 7, wherein during the discharge process of the discharge circuit, if the first discharge power or the second discharge power is greater than the preset power threshold, the fifth The load switch is in an off state, and the sixth load switch is in an on state.
The discharge circuit according to claim 2, wherein the output interface comprises a first interface, the load switch circuit comprises a first load switch and a second load switch, and the discharge circuit further comprises a first one-way switch and a second transformer circuit with boost function;

Wherein, one end of the first one-way switch, one end of the first load switch and one end of the second load switch are all coupled to the first interface, and the other end of the first one-way switch is connected to the The second end of the first voltage transformation conversion circuit is coupled, the other end of the second load switch is coupled to the second end of the step-down conversion circuit, and the second voltage transformation conversion circuit is coupled to the between the other end of the first load switch and the first node.
The discharge circuit according to any one of claims 1-9, characterized in that the discharge circuit further comprises a charging protocol circuit coupled to the output interface.
The discharge circuit according to claim 10, wherein the charging protocol circuit supports one of the following charging protocols: PPS protocol, secure copy SCP fast charging protocol, fast charging QC protocol, PE fast charging protocol or VOOC flash charge agreement.
The discharge circuit according to any one of claims 1-11, wherein the output interface is one of the following types: type-C interface, type-A interface, and thunderbolt interface.
The discharge circuit according to any one of claims 1-12, wherein the discharge circuit further has an input interface, and the input interface and the output interface are the same interface.
A chip system, characterized in that the chip system includes the discharge circuit according to any one of claims 1-13.
A terminal device, characterized in that the terminal device comprises the discharge circuit according to any one of claims 1-13.