CN115693808A

CN115693808A - Discharge circuit and terminal equipment

Info

Publication number: CN115693808A
Application number: CN202110832130.1A
Authority: CN
Inventors: 吴水琴; 索安达杰; 黄志强; 张安详
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-07-22
Filing date: 2021-07-22
Publication date: 2023-02-03
Also published as: WO2023001034A1

Abstract

The application provides a discharge circuit and terminal equipment, relates to electron technical field for improve the charge rate when user charges for another terminal equipment through a terminal equipment. The discharge circuit includes: a first voltage transformation and conversion circuit and a voltage reduction and conversion circuit at least having a voltage boosting function; the first end of the first voltage transformation conversion circuit and the first end of the voltage reduction conversion circuit are coupled to a first node, the first node is used for being coupled with a battery, the second end of the first voltage transformation conversion circuit and the second end of the voltage reduction conversion circuit are coupled with an output interface of the discharge circuit, and therefore two discharge paths with different powers exist between the first node and the output interface.

Description

Discharge circuit and terminal equipment

Technical Field

The application relates to the technical field of electronics, in particular to a discharge circuit and terminal equipment.

Background

With the rapid development of electronic technology, mobile terminal devices such as notebook computers, tablet computers, smart phones and the like have gradually become indispensable devices in daily life and work of people, and most of the terminal devices support super fast-charging technology. At present, when a rechargeable socket exists in an external environment, and a user charges a terminal device to be charged, the terminal device to be charged can be charged in a short time through a corresponding charger supporting a super fast charging technology, for example, taking a 40W super fast charging charger as an example, the charger charges a smart phone at a charging speed of 73% @4200mAh within 30 minutes. When a rechargeable socket does not exist in an external environment or a user does not carry a corresponding charger, the user can generally charge the terminal device to be charged through a mobile power source or a terminal device with an electricity storage function, such as a notebook computer, and the like, but the charging speed and the charging power in this manner are generally small, for example, taking the case that the user charges a smartphone through a notebook computer with the maximum charging power of 10W, the charging speed of the smartphone by the notebook computer within 30 minutes is 23% @4200mAh.

According to the charging rates under the two conditions, the problem of low charging speed and long full-charging time exists in a mode that one terminal device charges the other terminal device, and the charging mode is difficult to meet the use requirement of a user and poor in user experience.

Disclosure of Invention

The application provides a discharge circuit and terminal equipment for improving the charging rate of a user when charging another terminal equipment through one terminal equipment.

In order to achieve the purpose, the technical scheme is as follows:

in a first aspect, a discharge circuit is provided, which can be applied to a terminal device, and has an output interface, where 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 circuit includes: a first voltage transformation and conversion circuit and a voltage reduction and conversion circuit at least having a voltage boosting function; the first end of the first voltage transformation conversion circuit and the first end of the voltage reduction conversion circuit are coupled to a first node, the first node is used for being coupled with a battery, and the second end of the first voltage transformation conversion circuit and the second end of the voltage reduction conversion circuit are both coupled with the output interface of the discharge circuit.

In the above technical scheme, when the discharge circuit outputs the power supply voltage to the outside 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, and also can output a larger power supply voltage (for example, 10V) to the output interface through the first voltage transformation conversion circuit, that is, the discharge circuit includes two discharge paths, when the terminal device connected to the output interface supports the super fast charging technology, the discharge circuit can output a larger power supply voltage to the output interface through the first voltage transformation conversion circuit, and fast charge the terminal device connected to the output interface, so that the charging rate of a user when the user charges another terminal device through the terminal device where the discharge circuit is located can be greatly improved, the charging time length is shortened, and then the requirements of the user are met, and meanwhile, the user experience is also improved.

In one possible implementation manner of the first aspect, the discharge circuit further includes: and the second end of the first voltage transformation conversion circuit and the second end of the voltage reduction conversion circuit are coupled with the output interface through the load switch circuit. In the possible implementation mode, the first voltage transformation conversion circuit can be conducted through the load switch circuit to discharge the battery at high power, so that the charging rate of a user when the user charges another terminal device through the terminal device where the discharge circuit is located can be greatly improved, the charging time is shortened, the user requirement is further met, and meanwhile, the user experience is also improved.

In one possible implementation form of the first aspect, 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 unidirectional switch; one end of the first one-way switch, one end of the first load switch and one end of the second load switch are coupled with the first interface, the other end of the first one-way switch and the other end of the first load switch are coupled with the second end of the first voltage transformation conversion circuit, and the other end of the second load switch is coupled with the second end of the voltage reduction conversion circuit. In the possible implementation manner, when the discharging circuit is used for discharging the battery, the first one-way switch is in an off state, and if the first load switch is in a connected state and the second load switch is in an off state, the discharging circuit can be used for outputting a larger power supply voltage through the first interface, so that the discharging circuit can support charging of the terminal device meeting the super fast charging technology; if the first load switch is in a turn-off state and the second load switch is in a connected state, the discharging circuit can be used for outputting smaller power supply voltage through the first interface, so that the discharging circuit can meet the charging requirement of terminal equipment supporting low-power charging, the charging rate of a user for charging another terminal equipment through the terminal equipment can be greatly improved, the charging time is shortened, the requirement of the user is met, and meanwhile the user experience is also improved.

In a possible implementation manner of the first aspect, in a process that the discharge circuit discharges through the first interface, if a first discharge power of the first interface is greater than a preset power threshold, the first load switch is in a conducting state; if the first discharging power is less than or equal to the preset power threshold, the second load switch is in a conducting state. In the possible implementation manner, the discharge circuit may be configured to output a larger charging voltage through the first interface, so that the discharge circuit may support charging of a terminal device that meets the super fast charging technology; or the discharging circuit can be used for outputting smaller charging voltage through the first interface, so that the discharging circuit can meet the charging requirement of terminal equipment supporting low-power charging, the flexibility and the diversity of charging for another terminal equipment through the terminal equipment are further improved, the different charging requirements of a user are further met, and the user experience is also improved.

In one 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; one end of the second one-way switch, one end of the third load switch and one end of the fourth load switch are coupled with the second interface, the other end of the second one-way switch and the other end of the third load switch are coupled with the second end of the first voltage transformation conversion circuit, and the other end of the fourth load switch is coupled with the second end of the voltage reduction conversion circuit. In the above possible implementation manner, the output interface of the discharging circuit may include a first interface and a second interface, and both the first interface and the second interface may be configured to output a larger charging voltage or a smaller charging voltage, so that when the discharging circuit is used to charge an external terminal device, the first interface or the second interface may be used to output a larger charging voltage; in addition, the discharge circuit can also charge terminal equipment with different charging voltage requirements through the first interface and the second interface, so that the performance of the discharge circuit is further improved.

In a possible implementation manner of the first aspect, in a process that the discharge circuit discharges through the second interface, if a second discharge power of the second interface is greater than a preset power threshold, the third load switch is in a conducting state; if the second discharging power is less than or equal to the preset power threshold, the fourth load switch is in a conducting state. In the above possible implementation manner, the discharge circuit can be used for outputting a large charging voltage through the second interface, so that the charging of the terminal device supporting the super rapid charging technology is met, or a small charging voltage is output through the second interface, so that the charging of the terminal device supporting the low-power charging is met, the flexibility and the diversity of the user charging another terminal device through the terminal device are further improved, the different charging requirements of the user are further met, and the user experience is also improved.

In one 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 and conversion circuit having a voltage boosting function; the first end of the second voltage transformation and 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 and conversion circuit, one end of the fifth load switch and one end of the sixth load switch are coupled, the other end of the fifth load switch is coupled with the second end of the first voltage transformation and conversion circuit, and the other end of the sixth load switch is coupled with the first node. In the possible implementation manner, the discharge circuit can simultaneously charge the terminal device supporting the super fast charging technology through the first interface and the second interface, so that the performance of the discharge circuit is further improved.

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

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, the discharge circuit further includes a first unidirectional switch and a second transformation and conversion circuit with a voltage boosting function; one end of the first one-way switch, one end of the first load switch and one end of the second load switch are coupled with the first interface, the other end of the first one-way switch is coupled with the second end of the first voltage transformation conversion circuit, the other end of the second load switch is coupled with the second end of the voltage reduction 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 possible implementation manner, when the discharge circuit is used for discharging the battery, the first one-way switch is in the off state, and 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 for outputting a larger power supply voltage through the first interface, so that the discharge circuit can support the charging of the terminal device meeting the super fast charging technology, the requirements of a user are further met, and meanwhile, the user experience is also improved.

In one possible implementation form of the first aspect, the discharge circuit further comprises a charging protocol circuit, the charging protocol circuit being coupled with the output interface. In the possible implementation manner, the discharge circuit can perform discharge negotiation with different requirements through the charging protocol circuit, so that the discharge circuit can charge terminal devices with different charging requirements.

In one possible implementation form 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 possible implementation mode improves 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 form of the first aspect, the output interface is one of the following types: type-C interface, type-A interface, thunder and lightning interface. In the above possible implementation manner, the discharge circuit may support different types of input interfaces or output interfaces, so that the flexibility and diversity of the interface types supported by the input interface and the output interface are improved, and the performance of the discharge circuit is further improved.

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 may be reduced while the interface utilization rate of the discharge circuit is improved.

In a second aspect, a chip system is provided, the chip system comprising: a load, and a discharge circuit provided in the first aspect or any one of the possible implementations of the first aspect; the load may or may not be integrated with the discharge circuit. Optionally, when the discharge circuit includes a battery, the battery may not be integrated with the discharge circuit.

In a third aspect, a terminal device is provided, where the terminal device includes a load, and a discharge circuit provided in the first aspect or any one of the possible implementation manners of the first aspect, and the discharge circuit has an output port, and the discharge circuit can output a supply voltage to the outside through the output port.

It can be understood that any one of the chip systems and the terminal devices provided above includes the discharge circuit provided above, and therefore, the beneficial effects that can be achieved by the chip systems and the terminal devices can refer to the beneficial effects in the corresponding discharge circuits provided above, and are not described herein again.

Drawings

Fig. 1 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a charging system according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of a discharge circuit according to an embodiment of the present disclosure;

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 in the embodiment of the present application;

fig. 5B is a schematic structural diagram of another discharge circuit provided in 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 according to an embodiment of the present application.

Detailed Description

In this application, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and 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 the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a and b, a and c, b and c, or a, b and c, wherein a, b and c can be single or multiple.

The embodiments of the present application use the words "first" and "second" to distinguish between objects having similar names or functions, and those skilled in the art will appreciate that the words "first" and "second" do not limit the number or order of execution. The term "coupled" is used to indicate electrical connection, including direct connection through wires or connections, or indirect connection through other devices. Thus, "coupled" should be considered as an electronic communication connection in a broad sense.

The technical scheme provided by the embodiment of the application can be applied to various terminal devices comprising the discharge circuit. The terminal devices may include, but are not limited to, personal computers, server computers, hand-held or laptop devices, mobile devices (e.g., notebook computers, tablet computers, personal digital assistants, media players, etc.), in-vehicle devices, consumer electronics, minicomputers, mainframe computers, mobile robots, drones, and the like. The specific structure of the terminal device will be described below.

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

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

The processor 102 is a control center of the terminal device, connects various parts of the entire device by various interfaces and lines, performs various functions of the electronic device and processes data by running or executing software programs and/or software modules stored in the memory 101 and calling data stored in the memory 101, thereby integrally monitoring the terminal device. Alternatively, the processor 102 may include one or more processing units, for example, the processor 102 may include a Central Processing Unit (CPU), an Application Processor (AP), a modem processor, a Graphics Processing Unit (GPU), an Image Signal Processor (ISP), a controller, a video codec, a Digital Signal Processor (DSP), a baseband processor and/or a neural Network Processor (NPU), and the like. The different processing units may be separate devices or may be integrated into one or more processors.

The sensor component 103 includes one or more sensors for providing various aspects of status assessment for the terminal device. The sensor assembly 103 may include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor, and acceleration/deceleration, orientation, on/off state of the electronic device, relative positioning of the components, or temperature change of the electronic device may be detected by the sensor assembly 103. In addition, the sensor assembly 103 may also include a photosensor, such as a Complementary Metal Oxide Semiconductor (CMOS) or Charge Coupled Device (CCD) image sensor, for use in imaging applications, i.e., as an integral part of a camera.

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

The power supply 105 is used to provide power to various components of the terminal device (which may also be referred to as a load of the terminal device), and the power supply 105 may include a power management system, one or more power supplies, or other components associated with generating, managing, and distributing power for the terminal device. In the embodiment of the present application, the power supply 105 may include a power supply chip, which may include the discharge circuit provided herein, and may further include a battery, which may be used to supply power to the respective components through the discharge circuit or the battery.

I/o interface 106 provides an interface between processor 102 and a peripheral interface module, such as a keyboard, a mouse, or a Universal Serial Bus (USB) device.

Although not shown, the terminal device may further include an audio component, a communication component, and the like, for example, the audio component includes a microphone, and the communication component includes a wireless fidelity (WiFi) module or a bluetooth module, and the description of the embodiments of the present application is omitted here for brevity. Those skilled in the art will appreciate that the terminal device configuration shown in fig. 1 is not intended to be limiting and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.

Fig. 2 is a schematic diagram of a charging system according to an embodiment of the present disclosure, where the charging system may include a first terminal device and a second terminal device, and the first terminal device may be configured to charge the second terminal device. When the first terminal device and the second terminal device are connected through a charging wire, the first terminal device can discharge through the discharging circuit to charge the second terminal device. For example, the discharging circuit in the first terminal device may include a one-way switch, a buck-boost charging chip, and a 5V buck chip, which are coupled in sequence, a coupling point of the buck-boost charging chip and the 5V buck chip is connected to a battery, and an output end of the 5V buck chip may be connected to a charging control unit in the second terminal device through a 5V2A C2C charging line for controlling charging of the battery. In practical applications, the first terminal device may be a computer, a notebook computer, a mobile power supply, or a mobile phone, which has a function of supplying power to a load of the first terminal device and charging a connected terminal device, and the second terminal device may be a mobile (on the go) terminal device, which may receive power from other external terminal devices, such as a mobile phone, a wearable device, a vehicle-mounted device, a usb disk, or a hard disk. The embodiment of the present application does not limit the 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, where the power adapter may also be referred to as a charger for short, and the power adapter may be a power adapter supporting a super-fast charging technology. The power adapter may be configured to convert an 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 when the first terminal device is connected to a power source through the power adapter, the discharge circuit may be configured to supply power to the load and may also be configured to charge the battery. When the structure of the discharge circuit in the first terminal device is the structure of the discharge circuit shown in fig. 2, there are problems of slow charging speed and long full charge time when the first terminal device is used to charge the second terminal device.

It should be noted that the discharge circuit provided in the embodiment of the present application may supply power to the second terminal device through two paths, a first path of the two paths may supply power to the second terminal device through low-power discharge, and a second path may supply power to the second terminal device through high-power discharge, so that 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 in an embodiment of the present application, where the discharge circuit may be applied to the terminal device provided above, where the terminal device may be a first terminal device, and the discharge circuit includes: the battery charging circuit at least comprises a first transformation converting circuit 1 and a voltage reduction converting circuit 2 which have a boosting function, wherein a first end of the first transformation converting circuit 1 and a first end of the voltage reduction converting circuit 2 are coupled to a first node, the first node is used for being connected with a battery 3, and a second end of the first transformation converting circuit 1 and a second end of the voltage reduction converting circuit 2 are both coupled with an output interface of the discharging circuit. Optionally, the discharge circuit may further include the battery 3.

The output interface of the discharge circuit may include one or more interfaces and may be used to output a charging voltage, where the charging voltage may be used to charge a terminal device to be charged, and the output interface may be a Type C (Type-C ) interface, a Type a (Type-C, type-a) interface, a lightning interface, or the like. Fig. 3 illustrates an example in which the output interface includes one interface.

In addition, the first voltage transformation converting circuit 1 may realize charging with different voltages, for example, the first voltage transformation converting circuit 1 may be a boost converting circuit, that is, the first voltage transformation converting circuit 1 may have a boost charging function.

Specifically, when the output interface of the discharge circuit is connected to the second terminal device through a 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-the buck conversion circuit 2-the output port, and the second path is the battery 3-the first transform conversion circuit 1-the output port.

That is, when the second terminal device is charged through the output interface of the discharge circuit, two discharge paths exist between the battery 3 and the output port. The electric energy in the battery 3 in the first path is output from the output port after passing through the buck converter circuit 2, and the output voltage from the output port is small because the output voltage of the buck converter circuit 2 is small, for example, the output charging voltage is 5V, and the first path may be referred to as a low-power discharging path. The electric energy in the battery 3 in the second path can be output from the output port after passing through the first voltage transformation and conversion circuit 1, and since the first voltage transformation and conversion circuit 1 can realize voltage boosting, the voltage output from the output port can be boosted by the first voltage transformation and conversion circuit 1, that is, the charging voltage output from the output port is relatively large, for example, the charging voltage output is 10V, and the second path can be referred to as a high-power discharging path. Therefore, when the second terminal equipment supporting the super quick charging technology is charged through the discharging circuit, the second channel can be selected to charge the second terminal equipment, so that the charging rate can be greatly improved, the charging time can be shortened, the requirements of users are met, and meanwhile, the user experience is also improved.

Further, as shown in fig. 4, the discharge circuit may further include: a load switch circuit 4, a second terminal of the first voltage transforming and converting circuit 1, and a second terminal of the buck converting circuit 2 are coupled to the output interface through the load switch circuit 4. In one possible example, the load switch circuit 4 has three terminals, which are respectively denoted as a first terminal a, a second terminal b and a third terminal c, the first terminal a of the load switch circuit 4 is coupled to the second terminal of the first voltage transformation converting circuit 1, the second terminal b of the load switch circuit 4 is coupled to the second terminal of the voltage reduction converting circuit 2, and the third terminal c of the load switch circuit 4 is coupled to the output interface. 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 conducted, the discharge circuit may perform high-power discharge on the battery 3 by the first voltage transformation converting circuit 1, and if the second terminal b and the third terminal c of the load switch circuit 4 are conducted, the discharge circuit may perform low-power discharge on the battery 3 by the buck conversion circuit 2.

Optionally, the discharge circuit may also have a charging function, i.e. a function of charging the battery 3. At this time, the discharge circuit further has an input interface, and the discharge circuit may further include a unidirectional switch circuit 5, 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 voltage transformation converting circuit 1 and the second end of the step-down converting circuit 2.

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

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 be both a type C interface, a type a interface, a lightning interface, or the like, which is not specifically limited in this embodiment of the application.

When the discharge circuit also has a function of charging the battery 3, the discharge circuit can charge the battery 3 through the first voltage conversion circuit 1. Accordingly, during the discharging process of the discharging circuit, the discharging circuit can discharge the battery 3 through the first voltage transformation and conversion circuit 1; alternatively, the discharge circuit further includes a second voltage conversion circuit 6, and the discharge circuit discharges the battery 3 through the second voltage conversion circuit 6. These two cases will be described separately below.

In case 1, the discharging circuit charges the battery 3 through the first voltage transformation converting circuit 1, and simultaneously, the discharging circuit also discharges the battery 3 by multiplexing the first voltage transformation converting circuit 1.

For example, as shown in fig. 5A, one end of the unidirectional switch circuit 5 is coupled to the input interface of the discharge circuit, the other end of the unidirectional switch circuit 5 is coupled to the second end of the first voltage transformation converting circuit 1 and the first end a of the load switch circuit 4, the first end of the first voltage transformation converting circuit 1 and the first end of the buck converting circuit 2 are coupled to a first node, the second end of the buck converting circuit 2 and the second end b of the load switch circuit 4 are coupled, the third end c of the load switch circuit 4 is coupled to the output interface of the discharge circuit, and the battery 3 may be coupled between the first node and the ground GND.

The unidirectional switch circuit 5 may be an Over Voltage Protection (OVP) device. The first voltage-variable converting circuit 1 may include a buck-boost (buck-boost) charging management chip, which may implement buck charging and boost charging, and may also implement charging control, such as trickle charging, constant-current rapid charging (CC charging), and constant-voltage charging (CV charging) control, etc., according to the battery voltage, so as to provide a charging voltage and a charging current with high precision. The buck-boost charging management chip can also support a wider working voltage range, for example, the working voltage range can be 2.7V to 3.6V. The buck conversion circuit 2 may be a 5V buck (buck) chip, and the output voltage of the 5V buck chip is 5V. The load switch circuit 4 may be a high current protection switch chip for isolating other charge and discharge paths.

Specifically, when the input interface of the discharge circuit is connected to the power adapter and receives an input voltage, the one-way switch circuit 5 is turned on (or connected), and the load switch circuit 4 is turned off (or disconnected), and the input voltage charges the battery 3 after passing through the one-way switch circuit 5 and the first voltage transformation and conversion circuit 1 in sequence, that is, the charging path for charging the battery 3 is: the input interface comprises a one-way switch circuit 5, a first voltage transformation conversion circuit 1 and a battery 3. When the output interface of the discharging circuit is connected with a second terminal device through a charging wire, the discharging circuit can discharge through any one of the following two paths, the first path is a battery 3-a step-down conversion circuit 2-a load switch circuit 4 (a second end b is conducted with a third end c) -the output port, and the second path is a battery 3-a first transformation conversion circuit 1-a load switch circuit 4 (a first end a is conducted with a third end c) -the output port.

In case 2, the discharge circuit further includes a second voltage transformation/conversion circuit 6 having a voltage boosting function, and the discharge circuit charges the battery 3 through the first voltage transformation/conversion circuit 1 and discharges the battery 3 through the second voltage transformation/conversion circuit 6.

Illustratively, as shown in fig. 5B, one end of the unidirectional switch circuit 5 is coupled to the input interface of the discharge circuit, the other end of the unidirectional switch circuit 5 is coupled to the second end of the first voltage transformation converting circuit 1, the first end of the voltage reduction converting circuit 2, and the first end of the second voltage transformation converting circuit 6 are all coupled to a first node, the second end of the second voltage transformation converting circuit 6 is coupled to the first end a of the load switch circuit 4, the second end of the voltage reduction converting 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, and the battery 3 may be further coupled between the first node and the ground GND. Fig. 5B illustrates an example in which the input interface and the output interface of the discharge circuit are different interfaces and each includes one interface.

Specifically, when the input interface of the discharge circuit is connected to the power adapter and receives an input voltage, the one-way switch circuit 5 is turned on (or connected), and the load switch circuit 4 is turned off (or disconnected), and the input voltage charges the battery 3 after passing through the one-way switch circuit 5 and the first voltage transformation and conversion circuit 1 in sequence, that is, the charging path for charging the battery 3 is: the input interface comprises a one-way switch circuit 5, a first voltage transformation conversion circuit 1 and a battery 3. When the output interface of the discharging circuit is connected with a second terminal device through a charging wire, the discharging circuit can discharge through any one of the following two paths, the first path is a battery 3-a step-down conversion circuit 2-a load switch circuit 4 (a second end b is conducted with a third end c) -the output port, and the second path is a battery 3-a second transformation conversion circuit 6-a load switch circuit 4 (a first end a is conducted with a third end c) -the output port.

Further, the discharging circuit may further include a charging protocol circuit 7, and the charging protocol circuit 7 may be configured to be responsible for power negotiation during high-power charging. The charging protocol circuit 7 may be coupled to both the input interface and the output interface, wherein the charging protocol circuit 7 is coupled to the input interface for power negotiation during charging of the discharging circuit, and the charging protocol circuit 7 is coupled to the output interface for power negotiation during discharging of the discharging circuit. Optionally, the charging protocol circuit 7 is coupled to the output interface, and may be further configured to detect that 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: a Programmable Power Supply (PPS) protocol, a Secure Copy (SCP) fast charge protocol, a Quick Charge (QC) protocol, a high speed Pump (PE) fast charge protocol, or a 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 may be used to determine whether a device connected to the output port needs to be charged with high power or with low power. For example, the charging protocol circuit 7 is a PD chip and supports a PPS protocol, and the device connected to the output port also supports the PPS protocol, so that when the charging protocol circuit 7 detects that the connected device supports the PPS protocol through a charging wire, it may be determined that the connected device needs to be charged with high power, and if it is detected that the connected device does not support the PPS protocol, it may 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 or not can be used for supporting the discharge circuit to select the corresponding path of the two paths for discharging so as to charge the connected device with corresponding power. For example, the high-power charging device may be a device with a charging voltage greater than 5V, such as a mobile phone or a tablet computer, for example, the charging voltage may be 10V or 20V; the device for charging with low power may be a device with a charging voltage of no more than 5V, such as a usb flash disk, a hard disk, or a digital headset, for example, the charging voltage may be 3V or 5V.

In a possible embodiment, the first conversion circuit 1, the step-down conversion circuit 2, the load switch circuit 4, the unidirectional switch circuit 5, the second transformation conversion circuit 6 and the charging protocol circuit 7 are all coupled to a processor, which may be used to communicate with or control the above-mentioned circuits. In practical applications, the processor may be integrated in a system of chips (SoC).

In an example, when the charging protocol circuit 7 detects that the device connected to the output interface needs to perform high-power charging, the charging protocol circuit 7 may send first indication information indicating that high-power discharging is needed to the processor, and when the processor receives the first indication information, the processor may control the switching circuit in the high-power discharging path described above to be turned on, and control the first conversion circuit 1 or the second transformation conversion circuit 6 to perform boost conversion, and the like.

In another example, when the charging protocol circuit 7 detects that a device connected to the output interface needs to perform low-power charging, the charging protocol circuit 7 may send second indication information indicating that low-power discharging is needed to the processor, and when the processor receives the second indication information, the processor may control the switch circuit in the low-power discharging path described above to be turned on, and control the buck conversion circuit 2 to perform buck conversion, and so on.

In yet another example, when the input interface and the output interface of the discharging circuit are the same interface, if a device is connected to the interface, the processor may further detect a voltage of the interface, and determine that the device connected to the interface is a power adapter or a device to be charged according to whether the voltage is at a high level or at a low level.

Further, the output port of the discharge circuit may include one port or a plurality of ports, and when the number of the output ports included in the discharge circuit is different, the structure of the discharge circuit may also be different, and the following takes the example that the output port of the discharge circuit includes one port and two ports, respectively, and the structure of the discharge circuit and the corresponding operation process are described in detail.

First, the output port of the discharge circuit includes a port, and the discharge circuit charges the battery 3 through the first voltage transformation converting circuit 1 and also discharges the battery 3 through the first voltage transformation converting circuit 1. Illustratively, as shown in fig. 6, the output interface may include a first interface P1, the first interface P1 may also serve as an input interface of the discharging circuit, and the unidirectional switch circuit 5 includesThe first unidirectional switch OVP1, the load switch circuit 4 comprises a first load switch LS1 and a second load switch LS2. 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 coupled to the first interface P1, the other end of the first one-way switch OVP1, the other end of the first load switch LS1, and the second end of the first voltage transformation and conversion circuit 1 are coupled to each other, the other end of the second load switch LS2 is coupled to the second end of the voltage reduction and conversion circuit 2, the first end of the first voltage transformation and conversion circuit 1 and the first end of the voltage reduction and conversion circuit 2 are coupled to a first node, a battery 3 is coupled between the first node and a ground terminal GND, and the first node can also be used for outputting a working voltage V of the first terminal device _SYS The charging protocol circuit 7 is coupled to the first interface P1.

Specifically, when the first interface P1 of the discharging circuit is connected to the power adapter and receives an input voltage, the first one-way switch OVP1 is turned on, and the first load switch LS1 and the second load switch LS2 are all turned off, and a charging path through which the input voltage charges the battery 3 is as follows: the first interface P1, the first one-way switch OVP1, the first transformation conversion circuit 1 and the battery 3. When an externally connected device is charged by discharging through the first interface P1 of the discharge circuit, the first one-way switch OVP1 is opened, discharging through either of two paths like those described above. Further, if the first discharging power of the first interface P1 is smaller than the preset power threshold, the first interface P1 may be discharged through a first path, where the first path is specifically the battery 3, the buck converter circuit 2, the second load switch LS2 (connected) — the first interface P1; if the first discharging power of the first interface P1 is greater than or equal to the preset power threshold, the first interface P1 may be discharged through a second path, where the second path is specifically the battery 3, the first voltage transformation and conversion circuit 1, the first load switch LS1 (connected), and the first interface P1.

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

In the second type, the output port of the discharging circuit includes two ports, and the discharging circuit charges the battery 3 through the first voltage transformation converting circuit 1 and also discharges the battery 3 through the first voltage transformation converting circuit 1. Illustratively, 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, the one-way switch circuit 5 includes a first one-way switch OVP1 and a second one-way switch OVP2, and 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. 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 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 to the second interface P2, the other end of the first one-way switch OVP1, the other end of the second one-way switch OVP2, the other end of the first load switch LS1, and the other end of the third load switch LS3 are coupled to the second end of the first voltage transformation converting circuit 1, the other end of the second load switch LS2 and the other end of the fourth load switch LS4 are coupled to the second end of the voltage reduction converting circuit 2, the first end of the first voltage transformation converting circuit 1 and the first end of the voltage reduction converting circuit 2 are coupled to a first node, a battery 3 is coupled between the first node and a ground terminal GND, and the first node may be further used to output a working voltage V of the first terminal device _SYS The charging protocol circuit 7 is coupled to the first interface P1 and the second interface P2, respectively.

Specifically, when the battery 3 is charged through the discharge circuit, the battery 3 may be charged not only through the first interface P1 but also through the second interface P2. Wherein, when charging battery 3 through first interface P1, first interface is connected with power adapter and receives input voltage promptly, first one-way switch OVP1 switches on, second one-way switch OVP2 cuts off, first load switch LS1 to fourth load switch LS4 can all break off, and the charging path that this input voltage charges battery 3 is: the first interface P1-the first one-way switch OVP 1-the first transformation and conversion circuit 1-the battery 3. Similarly, when charging the battery 3 through the second interface P2, that is, the second interface P2 is connected to the power adapter and receives the input voltage, the second one-way switch OVP2 is turned on, the first one-way switch OVP1 is turned off, and the first load switch LS1 to the fourth load switch LS4 may all be turned off, and the charging path of the input voltage for charging the battery 3 is: the second interface P1-the second one-way switch OVP 2-the first transformation converting circuit 1-the battery 3.

When the battery 3 is discharged by the discharge circuit to charge an externally connected device, the discharge can be performed not only through the first interface P1 but also through the second interface P2, and the discharge can be performed through two paths similar to the above for either one of the first interface P1 and the second interface.

For the first interface P1, if the first discharge power of the first interface P1 is smaller than the preset power threshold, the first interface P1 may be discharged through a first path, where the first path is specifically the battery 3, the buck converter circuit 2, the second load switch LS2 (connected) — the first interface P1; if the first discharging power of the first interface P1 is greater than or equal to the preset power threshold, the first interface P1 may be discharged through a second path, where the second path is specifically the battery 3, the first voltage transformation and conversion circuit 1, the first load switch LS1 (connected), and the first interface P1.

For the second interface P2, if the second discharging power of the second interface P2 is smaller than the preset power threshold, discharging may be performed through a first path, where the first path is specifically the battery 3, the buck converter circuit 2, the fourth load switch LS4 (connected) -the second interface P2; if the second discharging power of the second interface P2 is greater than or equal to the preset power threshold, the second interface P2 may be discharged through a second path, where the second path is specifically the battery 3, the first voltage transformation converting circuit 1, the third load switch LS3 (connected) — the second interface P2.

For example, the following table 1 illustrates the corresponding operation process in a possible operation scenario of the discharge circuit.

TABLE 1

It should be noted that, in the discharge circuit shown in fig. 7, high-power discharge may be performed through the first interface P1 or the second interface P2 in a scene without charging, and low-power discharge may be performed simultaneously in a charging process, but high-power discharge cannot be performed simultaneously in a charging process.

In practical applications, for the first interface P1 and the second interface P2, one of the two interfaces may be set as a high-power discharging interface (i.e. a path for communicating the high-power discharging corresponding to the interface), and it is assumed in table 1 that the first interface P1 is the high-power discharging interface. As can be seen from table 1, in the process of charging the battery 3 by the discharge circuit, the interface with the larger charging power of the first interface P1 and the second interface P2 can be selected to charge the battery 3; in the process of discharging the battery 3 through the discharging circuit, if the first interface P1 and the second interface P2 are not used simultaneously or used for discharging simultaneously, the second path of the first interface P1 can be selected for discharging when high-power discharging is needed, and the first path of the second interface P2 can be selected for discharging when low-power discharging is needed; 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 be discharged through a path corresponding to low-power discharging.

In the discharge circuits provided in fig. 6 and fig. 7, when the second terminal device is charged through the discharge circuit, if the second terminal device does not support the super fast charge technology, the second terminal device may be charged through the above-described first path of low-power discharge corresponding to the interface, and if the second terminal device supports the super fast charge technology, the second terminal device may be charged through the above-described second path of high-power discharge corresponding to the interface, so that the discharge circuit may realize high-power charge of a device connected externally without affecting the existing charge and discharge function. Therefore, the discharge circuit can meet the requirements of users for different charging powers.

And thirdly, the output port of the discharge circuit comprises a port, the discharge circuit also comprises a second transformation and conversion circuit 6, the discharge circuit charges the battery 3 through the first transformation and conversion circuit 1, and discharges the battery 3 through the second transformation and conversion circuit 6. Illustratively, as shown in fig. 8, the output interface may include a first interface P1, the first interface P1 may also serve as an input interface of the discharge circuit, the unidirectional switch circuit 1 includes a first unidirectional switch OVP1, and the load switch circuit 4 includes a first load switch LS1 and a second load switch LS2. One end of a first one-way switch OVP1, one end of a first load switch LS1 and one end of a second load switch LS2 are coupled with a first interface P1, the other end of the first one-way switch OVP1 is coupled with a second end of a first voltage transformation and conversion circuit 1, the other end of the first load switch LS1 is coupled with a first end of a second voltage transformation and conversion circuit 6, a first end of the first voltage transformation and conversion circuit 1, a second end of the second voltage transformation and conversion circuit 6 and a first end of a voltage reduction and conversion circuit 2 are coupled with a first node, a second end of the voltage reduction and conversion circuit 2 is coupled with the other end of the second load switch LS2, a battery 3 is coupled between the first node and a ground terminal GND, and the first node can also be used for outputting a working voltage V of a first terminal device _SYS The charging protocol circuit 7 is coupled to the first interface P1.

Specifically, when the first interface P1 of the discharging circuit is connected to the power adapter and receives an input voltage, the first one-way switch OVP1 is turned on, and the first load switch LS1 and the second load switch LS2 are all turned off, and a charging path through which the input voltage charges the battery 3 is as follows: the first interface P1, the first one-way switch OVP1, the first transformation conversion circuit 1 and the battery 3. When an externally connected device is charged by discharging through the first interface P1 of the discharge circuit, the first one-way switch OVP1 is opened, discharging through either of two paths like those described above. Further, if the first discharge power of the first interface P1 is smaller than the preset power threshold, the first interface P1 may be discharged through a first path, where the first path is specifically the battery 3, the buck converter circuit 2, the second load switch LS2 (connected) — the first interface P1; if the first discharging power of the first interface P1 is greater than or equal to the preset power threshold, the first interface P1 may be discharged through a second path, where the second path is specifically the battery 3, the second voltage transformation and conversion circuit 6, the first load switch LS1 (connected) — the first interface P1.

And fourthly, the output port of the discharging circuit comprises two ports, the discharging circuit also comprises a second voltage transformation and conversion circuit 6, the discharging circuit charges the battery 3 through the first voltage transformation and conversion circuit 1, and discharges the battery 3 through the second voltage transformation and conversion circuit 6. Illustratively, in conjunction with fig. 7, as shown in fig. 9, 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 discharging circuit, and the load switch circuit 4 further includes a fifth load switch LS5 and a sixth load switch LS6. A first end of the second voltage transformation and conversion circuit 6, the other end of the first load switch LS1, and the other end of the second load switch LS2 are coupled, a second end of the second voltage transformation and conversion circuit 6, one end of the fifth load switch LS5, and one end of the sixth load switch LS6 are coupled, the other end of the fifth load switch LS5 is coupled to a second end of the first voltage transformation and conversion circuit 1, and the other end of the sixth load switch LS6 is coupled to the first node. The discharging circuit shown in fig. 9 is different from the discharging circuit shown in fig. 7 described above in that the discharging circuit shown in fig. 9 can simultaneously perform high-power discharging during the charging process of the discharging circuit. The charging and discharging processes 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, the first interface P1 or the second interface P2 of the discharge circuit is connected to the power adapter and receives the input voltage, the charging path of the discharge circuit is the same as the charging path described in fig. 7, that is, the charging path when the battery 3 is charged through the first interface P1 is the first interface P1-the first one-way switch OVP 1-the first voltage transformation converting circuit 1-the battery 3, and the charging path when the battery 3 is charged through the second interface P2 is the second interface P2-the second one-way switch OVP 2-the first voltage transformation converting 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, two paths for discharging exist for each interface. When the battery 3 is discharged through the first interface P1 of the discharging circuit, if the first discharging power of the first interface P1 is smaller than the preset power threshold, the battery 3, the buck conversion circuit 2, the second load switch LS2 (connected) -the first interface P1 may be discharged through a first path; if the first discharging power of the first interface P1 is greater than or equal to the preset power threshold, the discharging may be performed through a second path, where the second path is specifically the battery 3, the sixth load switch LS6 (connected), the second voltage transformation and conversion circuit 6, the first load switch LS1 (connected), and the first interface P1. When the battery 3 is discharged through the second interface P2 of the discharging circuit, if the second discharging power of the second interface P2 is smaller than the preset power threshold, the battery can be discharged through a first path, and the first path is specifically the battery 3, the buck conversion circuit 2, the fourth load switch LS4 (connected) -the second interface P2; if the second discharging power of the second interface P2 is greater than or equal to the preset power threshold, the second discharging power may be discharged through a second path, where the second path is specifically the battery 3, the sixth load switch LS6 (connected), the second voltage transformation and conversion circuit 6, the third load switch LS3 (connected), and the second interface P2.

When the battery 3 is charged through the first interface P1 of the discharging circuit and 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-the first one-way switch OVP 1-the first voltage transformation converting circuit 1-the battery 3, and the path corresponding to the second interface P2 that charges with high power externally is the first interface P1-the first one-way switch OVP 1-the fifth load switch LS5 (connected) -the second voltage transformation converting 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 discharging circuit and 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-the second one-way switch OVP 2-the first voltage transformation converting circuit 1-the battery 3, and the path corresponding to the first interface P1 that charges with high power externally is the second interface P2-the second one-way switch OVP 2-the fifth load switch LS5 (connected) -the second voltage transformation converting circuit 6-the first load switch LS1 (connected) -the first interface P1.

For example, the following table 2 illustrates the corresponding operation process in a possible operation scenario of the discharge circuit.

TABLE 2

In the discharge circuit provided in fig. 9, in a scenario where the battery 3 is not charged, the battery 3 may be discharged with high power through the first interface P1 or the second interface P2, that is, in the scenario, a device connected to the outside may be charged with high power. Under the scene that the battery 3 is charged through one of the first interface P1 or the second interface P2, a part of the power output by the power adapter may pass through the first voltage transformation converting circuit 1 and then charge the battery 3, and at the same time, another part of the power may pass through the fifth load switch LS5 and the second voltage transformation converting circuit 6 and then output through the other interface to perform high-power charging on an externally connected device. Therefore, when the discharge circuit is used for charging the second terminal equipment supporting the super fast charging technology, the second terminal equipment can be charged with high power not only when the discharge circuit is in an uncharged scene, but also when the discharge circuit is in a charging scene, so that the charging rate of the second terminal equipment is greatly improved, the charging time is shortened, the requirements of users are met, and the user experience is also improved. In addition, the total power output by the power adapter is only converted by the first voltage transformation converting circuit 1 and the second voltage transformation converting circuit 6, that is, the total power of the first voltage transformation converting circuit 1 and the second voltage transformation converting circuit 6 is equal to the total power output by the power adapter, so that the heat loss can be reduced, and the problem of overheating of the first terminal equipment using the discharging circuit can be avoided.

Based on this, this application embodiment also provides a chip system, and this chip system includes any kind of discharge circuit that provides above. Alternatively, the chip system may comprise a plurality of chips, each of which may be used to integrate one device or a plurality of devices in the discharge circuit provided above. For example, the first voltage transformation converting circuit 1 and the second voltage transformation converting circuit 6 may be two voltage step-up/step-down converting chips, each of the first load switch LS1 to the fourth load switch LS4 may be a load switch chip, and the voltage step-down converting circuit 2 may be a voltage step-down converting chip. It should be noted that the detailed description of the discharge circuit above can be incorporated into the related description of the chip system, and the embodiments of the present application are not repeated herein.

In another aspect of the present application, a terminal device is also provided, where the terminal device may be a notebook computer, a tablet computer, a palm computer, a computer, or a mobile phone. Illustratively, 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. The processor 301, the memory 302, the communication interface 303 and the discharge circuit 305 are connected by a bus 304. The discharge circuit 305 may include or be coupled to a battery, and the discharge circuit 305 may be used to power the processor 301, the memory 302, and the communication interface 304.

It should be noted that the discharge circuit 305 in the terminal device may be any one of the discharge circuits provided above, and for the relevant description of the discharge circuit 305, reference may be made to the relevant description of the discharge circuit provided above, and details of the embodiment of the present application are not repeated herein.

The processor 301 may be, among other things, a central processing unit, a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor 301 may also be a combination of computing functions, e.g., comprising one or more microprocessors in combination, a digital signal processor in combination with a microprocessor, and so forth.

The memory 302 may be used to store data, software programs, and modules, and mainly includes a program storage area that may store an operating system, an application program required for at least one function, and the like, and a data storage area that may store data created when the terminal is used, and the like. The processor 302 is used for controlling and managing the actions of the terminal, such as performing various functions of the terminal and processing data by executing or executing software programs and/or modules stored in the memory as well as invoking data stored in the memory. The communication interface 303 is used for supporting the terminal device to perform communication.

The bus 304 may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 10, but that does not indicate only one bus or one type of bus.

Further, the terminal device may further include one or more of a plurality of components such as a multimedia component, a sensor component, and an audio circuit, which are not described herein again in this embodiment of the application.

In the terminal device provided by the embodiment of the application, the terminal device comprises the discharging circuit provided by the above, the discharging circuit can be used for charging the externally connected device with low power, and can also be used for charging the externally connected device with high power, so that the charging rate can be greatly improved and the charging time can be shortened when the high-power charging is carried out, and then the requirements of users on different charging powers can be met, and meanwhile, the user experience is also improved.

In the several embodiments provided in the present application, it should be understood that the above-described discharge circuit, system of chips and terminal devices are only illustrative, for example, the division of the modules or units is only a logical division, and other division ways may be available in actual implementation, for example, a plurality of units or components may be combined or integrated into another device, or some features may be omitted, or not executed. In addition, the shown or discussed coupling or direct coupling or communication connection between each other may be an indirect coupling or communication connection through some interfaces, devices or units.

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

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

Finally, it should be noted that: the above description is only an embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A discharge circuit, comprising: the first transformation and conversion circuit and the buck conversion circuit at least have a boosting function;

the first end of the first voltage transformation conversion circuit and the first end of the voltage reduction conversion circuit are coupled to a first node, the first node is used for being coupled with a battery, and the second end of the first voltage transformation conversion circuit and the second end of the voltage reduction conversion circuit are coupled with an output interface of the discharge circuit.

2. The discharge circuit of claim 1, further comprising: a load switch circuit, said second terminal of said first voltage transformation converting circuit and said second terminal of said voltage reduction converting circuit being coupled to said output interface through said load switch circuit.

3. The discharge circuit of claim 2, wherein the output interface comprises a first interface, the load switch circuit comprises a first load switch and a second load switch, the discharge circuit further comprises a first unidirectional switch;

one end of the first unidirectional switch, one end of the first load switch and one end of the second load switch are coupled with the first interface, the other end of the first unidirectional switch and the other end of the first load switch are coupled with the second end of the first voltage transformation conversion circuit, and the other end of the second load switch is coupled with the second end of the voltage reduction conversion circuit.

4. The discharge circuit of claim 3, wherein, during discharge of the discharge circuit through the first interface,

if the first discharging power of the first interface is larger than a preset power threshold, the first load switch is in a conducting state;

and if the first discharge power is less than or equal to the preset power threshold, the second load switch is in a conducting state.

5. The discharge circuit of claim 3 or 4, wherein the output interface further comprises a second interface, wherein the load switch circuit further comprises a third load switch and a fourth load switch, wherein the discharge circuit further comprises a second unidirectional switch;

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 with the second interface, the other end of the second unidirectional switch and the other end of the third load switch are all coupled with the second end of the first voltage transformation conversion circuit, and the other end of the fourth load switch is coupled with the second end of the voltage reduction conversion circuit.

6. The discharge circuit of claim 5, wherein, during discharge of the discharge circuit through the second interface,

if the second discharging power of the second interface is larger than a preset power threshold, the third load switch is in a conducting state;

and if the second discharge power is less than or equal to the preset power threshold, the fourth load switch is in a conducting state.

7. 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 transformation and conversion circuit having a voltage boosting function;

the first end of the second voltage transformation converting 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 converting circuit, one end of the fifth load switch and one end of the sixth load switch are coupled, the other end of the fifth load switch is coupled with the second end of the first voltage transformation converting circuit, and the other end of the sixth load switch is coupled to the first node.

8. The discharging circuit of claim 7, wherein during a discharging process of the discharging circuit, if the first discharging power or the second discharging power is greater than the predetermined power threshold, the fifth load switch is in an off state and the sixth load switch is in an on state.

9. The discharge circuit of 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 unidirectional switch and a second transformation and conversion circuit with a boosting function;

one end of the first unidirectional switch, one end of the first load switch, and one end of the second load switch are coupled to the first interface, the other end of the first unidirectional switch is coupled to the second end of the first voltage transformation and conversion circuit, the other end of the second load switch is coupled to the second end of the voltage reduction and conversion circuit, and the second voltage transformation and conversion circuit is coupled between the other end of the first load switch and the first node.

10. The discharge circuit of any of claims 1-9, further comprising a charge protocol circuit coupled with the output interface.

11. The discharge circuit of claim 10 wherein the charge protocol circuit supports one of the following charge protocols: PPS protocol, secure copy SCP fast charging protocol, fast charging QC protocol, PE fast charging protocol or VOOC flash charging protocol.

12. The discharge circuit of any of claims 1-11, wherein the output interface is one of the following types: type-C interface, type-A interface, thunder and lightning interface.

13. The discharge circuit of any of claims 1-12, further comprising an input interface, wherein the input interface and the output interface are the same interface.

14. A chip system, characterized in that the chip system comprises a discharge circuit according to any of claims 1-13.

15. A terminal device, characterized in that the terminal device comprises a discharge circuit according to any one of claims 1-13.