Charging circuit and intelligent terminal

Abstract

The embodiment of the utility model provides a charging circuit and an intelligent terminal. The charging circuit comprises a wireless charging module, a charging management module and a wired charging module. The charging management module is connected with the wireless charging module and the wired charging module. The charging management module is used for receiving electric energy input by the wireless charging module or the wired charging module and charging a battery through an output interface; and the charging management module is also used for forbidding the wireless charging module when the wired charging module has electric energy input. The charging circuit is simple in structure, and wired charging and wireless charging can be isolated.

Description

Technical Field

[0001] This application relates to the technical field. More specifically, it relates to a charging circuit and a smart terminal. Background Technology

[0002] With the development of smart terminals, more and more smart terminals support wireless charging and wired charging.

[0003] In the process of conceiving and implementing this application, the inventors discovered at least the following problems: During the charging process, in order to prevent mutual charging between wired and wireless inputs, which could lead to charging abnormalities in the smart terminal, wired and wireless isolation is usually performed through the charging circuit. However, the existing charging circuit structure is complex.

[0004] The preceding description is intended to provide general background information and does not necessarily constitute prior art. Utility Model Content

[0005] The charging circuit and smart terminal provided in this application are intended to simplify the current charging circuit structure.

[0006] This application provides a charging circuit, including a wireless charging module, a charging management module, and a wired charging module; the charging management module is connected to both the wireless charging module and the wired charging module.

[0007] The charging management module is used to receive electrical energy input from the wireless charging module or the wired charging module, and to charge the battery through the output interface;

[0008] The charging management module is also used to disable the wireless charging module when there is power input to the wired charging module.

[0009] Optionally, the charging management module includes: a first port, which is connected to the wired charging module;

[0010] The charging management module is further configured to determine that the wired charging module has electrical energy input when the voltage detected at the first port is greater than a first preset voltage.

[0011] Optionally, the charging management module includes a second port and a third port, wherein the second port is connected to the wired charging module and the wireless charging module respectively, and the third port is connected to the wireless charging module;

[0012] The charging management module is used to receive electrical energy output from the wireless charging module or the wired charging module through the second port;

[0013] The charging management module is also used to output an indication signal through the third port, the indication signal being used to indicate whether there is power input to the wired charging module.

[0014] Optionally, the wireless charging module is used for:

[0015] When the indicator signal output from the third port is detected to be a low-level signal, it is determined that there is power input to the wired charging module;

[0016] Wireless charging output is off.

[0017] Optionally, the wired charging module includes an overvoltage protection unit, and the charging management module further includes a fourth port. The overvoltage protection unit is connected to an external power supply, the second port, and the fourth port, respectively.

[0018] The charging management module is further configured to send a drive signal to the overvoltage protection unit through the fourth port when the voltage detected at the first port is greater than the second preset voltage, or when the voltage detected at the second port is greater than the third preset voltage, so as to drive the overvoltage protection unit to turn off, thereby performing overvoltage protection; the second preset voltage is greater than the first preset voltage.

[0019] Optionally, the charging management module further includes: a first comparison unit and a signal output unit;

[0020] The first comparison unit is connected to the first port and the signal output unit respectively, and the signal output unit is also connected to the third port;

[0021] The first comparison unit is used to acquire the voltage detected by the first port, and output a first comparison signal when the voltage is greater than a preset voltage;

[0022] The signal output unit is used to output the low-level signal through the third port when the first comparison signal is received.

[0023] Optionally, the signal output unit includes a switching transistor, which is connected to the first comparison unit and the third port respectively, and the switching transistor is also grounded;

[0024] The switching transistor is used to turn on when the first comparison signal is received, and pull the level of the third port low through grounding so that the third port outputs a low-level signal.

[0025] Optionally, the charging management module further includes: a second comparison unit and a control unit;

[0026] The second comparison unit is connected to the second port, and the control unit is connected to the first comparison unit, the second comparison unit, and the fourth port respectively;

[0027] The control unit is used for:

[0028] Receive the comparison signal output by the first comparison unit and the comparison signal output by the second comparison unit;

[0029] If the comparison signal output by the first comparison unit indicates that the voltage detected by the first port is greater than or equal to the first preset voltage, and the comparison signal output by the second comparison unit indicates that the voltage detected by the second port is less than the fourth preset voltage, then a drive signal is sent to the overvoltage protection unit through the fourth port to drive the overvoltage protection unit to turn on.

[0030] Optionally, the control unit further includes: an AND gate and a controller, wherein the AND gate is connected to the first comparison unit, the second comparison unit, and the controller, respectively;

[0031] The AND gate is used for:

[0032] The system receives a first comparison signal output by the first comparison unit and a second comparison signal output by the second comparison unit; the first comparison signal is used to indicate that the voltage detected by the first port is greater than or equal to a first preset voltage; the second comparison signal is used to indicate that the voltage detected by the second port is less than a fourth preset voltage.

[0033] An enable signal is generated based on the first comparison signal and the second comparison signal, and the enable signal is sent to the controller so that the controller drives the overvoltage protection unit to turn on based on the enable signal.

[0034] This application also provides a smart terminal, including a charging circuit as described above (at least one of the above).

[0035] As described above, the charging circuit of this application, applied to a smart terminal, includes: a wireless charging module, a charging management module, and a wired charging module; the charging management module is connected to both the wireless charging module and the wired charging module; the charging management module is used to receive electrical energy input from the wireless charging module or the wired charging module, and to charge the battery through an output interface; the charging management module is also used to detect whether there is electrical energy input to the wired charging module, and to disable the wireless charging module when there is electrical energy input. The above charging circuit has a simple structure and can achieve isolation between wired and wireless charging. Attached Figure Description

[0036] To more clearly illustrate the implementation methods in the embodiments of this application or related technologies, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings.

[0037] Figure 1 A schematic diagram of the hardware structure of a mobile terminal to implement the various embodiments of this application;

[0038] Figure 2 This is a schematic diagram of an existing charging circuit.

[0039] Figure 3 This is a schematic diagram of a charging circuit provided in an embodiment of this application;

[0040] Figure 4 This is a schematic diagram of another charging circuit provided in an embodiment of this application.

[0041] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0042] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0043] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Optionally, components, features, and elements with the same names in different embodiments of this application may have the same meaning or different meanings, the specific meaning of which needs to be determined by its interpretation in that specific embodiment or further in conjunction with the context of that specific embodiment.

[0044] It should be understood that although the terms first, second, third, etc., may be used herein to describe various information, such information should not be limited to these terms. These terms are used only to distinguish information of the same type from one another. For example, without departing from the scope of this document, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if," as used herein, may be interpreted as "when," "when," or "in response to determination." Furthermore, as used herein, the singular forms "a," "an," and "the" are intended to also include the plural forms unless the context indicates otherwise. It should be further understood that the terms "comprising," "including," indicate the presence of a feature, step, operation, element, component, item, kind, and / or group, but do not exclude the presence, occurrence, or addition of one or more other features, steps, operations, elements, components, items, kinds, and / or groups. The terms "or," "and / or," "including at least one of the following," etc., used in this application may be interpreted as inclusive, or mean any one or any combination thereof. For example, "including at least one of the following: A, B, C" means "any one of the following: A; B; C; A and B; A and C; B and C; A and B and C." Similarly, "A, B, or C" or "A, B, and / or C" means "any one of the following: A; B; C; A and B; A and C; B and C; A and B and C." Exceptions to this definition only occur when the combination of elements, functions, steps, or operations is inherently mutually exclusive in some way.

[0045] Depending on the context, the words “if” or “suppose” as used here can be interpreted as “when” or “in response to determination” or “in response to detection.” Similarly, depending on the context, the phrases “if determination” or “if detection (of the stated condition or event)” can be interpreted as “when determination” or “in response to determination” or “when detection (of the stated condition or event)” or “in response to detection (of the stated condition or event).”

[0046] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0047] In the following description, the use of suffixes such as "module," "part," or "unit" to denote elements is solely for the purpose of illustrative purposes and has no specific meaning in itself. Therefore, "module," "part," or "unit" may be used interchangeably.

[0048] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0049] Smart terminals can be implemented in various forms. For example, the smart terminals described in this application may include mobile terminals such as mobile phones, tablets, laptops, handheld computers, personal digital assistants (PDAs), portable media players (PMPs), navigation devices, wearable devices, smart bracelets, pedometers, etc., as well as fixed terminals such as digital TVs and desktop computers.

[0050] The following description will use a smart terminal as an example. Those skilled in the art will understand that, apart from elements specifically designed for smart purposes, the construction according to the embodiments of this application can also be applied to fixed types of terminals.

[0051] Please see Figure 1 This is a schematic diagram of the hardware structure of a smart terminal implementing various embodiments of this application. The smart terminal 100 may include: an RF (Radio Frequency) unit 101, a WiFi module 102, an audio output unit 103, an A / V (Audio / Video) input unit 104, a sensor 105, a display unit 106, a user input unit 107, an interface unit 108, a memory 109, a processor 110, and a power supply 111, etc. Those skilled in the art will understand that... Figure 1 The smart terminal structure shown does not constitute a limitation on the smart terminal. A smart terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0052] The following is combined with Figure 1 A detailed introduction to each component of the smart terminal:

[0053] The radio frequency unit 101 can be used for receiving and transmitting signals during information transmission or calls. Specifically, it receives downlink information from the base station and processes it with the processor 110; additionally, it transmits uplink data to the base station. Typically, the radio frequency unit 101 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low-noise amplifier, and a duplexer. Furthermore, the radio frequency unit 101 can also communicate wirelessly with networks and other devices. The aforementioned wireless communications may use any communication standard or protocol, including but not limited to GSM (Global System of Mobile communication), GPRS (General Packet Radio Service), CDMA2000 (Code Division Multiple Access 2000), WCDMA (Wideband Code Division Multiple Access), TD-SCDMA (Time Division-Synchronous Code Division Multiple Access), FDD-LTE (Frequency Division Duplexing-Long Term Evolution), TDD-LTE (Time Division Duplexing-Long Term Evolution), 5G, and 6G.

[0054] WiFi is a short-range wireless transmission technology. Smart terminals, through the WiFi module 102, can help users send and receive emails, browse web pages, and access streaming media, providing users with wireless broadband internet access. Although Figure 1 WiFi module 102 is shown, but it is understood that it is not a necessary component of a smart terminal and can be omitted as needed without changing the essence of the invention.

[0055] The audio output unit 103 can convert audio data received by the radio frequency unit 101 or the WiFi module 102 or stored in the memory 109 into audio signals and output them as sound when the smart terminal 100 is in call signal receiving mode, call mode, recording mode, voice recognition mode, broadcast receiving mode, etc. Furthermore, the audio output unit 103 can also provide audio output related to specific functions performed by the smart terminal 100 (e.g., call signal receiving sound, message receiving sound, etc.). The audio output unit 103 may include a speaker, a buzzer, etc.

[0056] The A / V input unit 104 is used to receive audio or video signals. The A / V input unit 104 may include a graphics processing unit (GPU) 1041 and a microphone 1042. The GPU 1041 processes image data of still images or videos acquired by an image capture device (such as a camera) in video capture mode or image capture mode. The processed image frames can be displayed on the display unit 106. The image frames processed by the GPU 1041 can be stored in the memory 109 (or other storage media) or transmitted via the radio frequency unit 101 or the WiFi module 102. The microphone 1042 can receive sound (audio data) in operating modes such as telephone call mode, recording mode, and voice recognition mode, and can process such sound into audio data. The processed audio (voice) data can be converted into a format that can be transmitted to a smart communication base station via the radio frequency unit 101 in telephone call mode. The microphone 1042 can implement various types of noise cancellation (or suppression) algorithms to eliminate (or suppress) noise or interference generated during the reception and transmission of audio signals.

[0057] The smart terminal 100 also includes at least one sensor 105, such as a light sensor, a motion sensor, and other sensors. Optionally, the light sensor includes an ambient light sensor and a proximity sensor. Optionally, the ambient light sensor can adjust the brightness of the display panel 1061 according to the ambient light level, and the proximity sensor can turn off the display panel 1061 and / or backlight when the smart terminal 100 is brought close to the ear. As a type of motion sensor, the accelerometer sensor can detect the magnitude of acceleration in various directions (generally three axes), and can detect the magnitude and direction of gravity when stationary. It can be used for applications that recognize the phone's posture (such as landscape / portrait switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer, tapping), etc. Other sensors that can also be configured in the phone, such as fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, and infrared sensors, will not be described in detail here.

[0058] The display unit 106 is used to display information input by the user or information provided to the user. The display unit 106 may include a display panel 1061, which may be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), or the like.

[0059] User input unit 107 can be used to receive input numerical or character information, and generate key signal inputs related to user settings and function control of the smart terminal. Optionally, user input unit 107 may include touch panel 1071 and other input devices 1072. Touch panel 1071, also known as a touch screen, can collect touch operations performed by the user on or near it (such as operations performed by the user using a finger, stylus, or any suitable object or accessory on or near touch panel 1071), and drive corresponding connection devices according to a pre-set program. Touch panel 1071 may include two parts: a touch detection device and a touch controller. Optionally, the touch detection device detects the user's touch position and the signal generated by the touch operation, and transmits the signal to the touch controller; the touch controller receives touch information from the touch detection device, converts it into touch point coordinates, sends it to processor 110, and can receive and execute commands sent by processor 110. In addition, touch panel 1071 can be implemented using various types such as resistive, capacitive, infrared, and surface acoustic wave. In addition to the touch panel 1071, the user input unit 107 may also include other input devices 1072. Optionally, other input devices 1072 may include, but are not limited to, one or more of the following: physical keyboard, function keys (such as volume control buttons, power buttons, etc.), trackball, mouse, joystick, etc., without being specifically limited here.

[0060] Optionally, the touch panel 1071 may cover the display panel 1061. When the touch panel 1071 detects a touch operation on or near it, it transmits the information to the processor 110 to determine the type of touch event. Subsequently, the processor 110 provides corresponding visual output on the display panel 1061 based on the type of touch event. Although in Figure 1 In this embodiment, the touch panel 1071 and the display panel 1061 are two independent components to realize the input and output functions of the smart terminal. However, in some embodiments, the touch panel 1071 and the display panel 1061 can be integrated to realize the input and output functions of the smart terminal. The specific implementation is not limited here.

[0061] Interface unit 108 serves as an interface through which at least one external device can connect to smart terminal 100. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device with an identification module, an audio input / output (I / O) port, a video I / O port, a headphone port, and so on. Interface unit 108 may be used to receive input (e.g., data, power, etc.) from the external device and transmit the received input to one or more elements within smart terminal 100, or it may be used to transmit data between smart terminal 100 and the external device.

[0062] The memory 109 can be used to store software programs and various data. The memory 109 may primarily include a program storage area and a data storage area. Optionally, the program storage area may store the operating system, applications required for at least one function (such as sound playback, image playback, etc.), etc.; the data storage area may store data created based on the use of the mobile phone (such as audio data, phonebook, etc.). Furthermore, the memory 109 may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device.

[0063] The processor 110 is the control center of the smart terminal. It connects various parts of the smart terminal via various interfaces and lines. By running or executing software programs and / or modules stored in the memory 109, and by calling data stored in the memory 109, it performs various functions and processes data of the smart terminal, thereby providing overall monitoring of the smart terminal. The processor 110 may include one or more processing units; preferably, the processor 110 may integrate an application processor and a modem processor. Optionally, the application processor mainly handles the operating system, user interface, and applications, while the modem processor mainly handles wireless communication. It is understood that the modem processor may not be integrated into the processor 110.

[0064] The smart terminal 100 may also include a power supply 111 (such as a battery) that supplies power to various components. Preferably, the power supply 111 can be logically connected to the processor 110 through a power management system, thereby enabling functions such as charging, discharging, and power consumption management through the power management system.

[0065] although Figure 1 As not shown, the smart terminal 100 may also include a Bluetooth module, etc., which will not be described in detail here.

[0066] Based on the above-described intelligent terminal hardware structure, various embodiments of this application are proposed.

[0067] As mentioned earlier, more and more smart terminals support both wireless and wired charging. To prevent cross-feeding between wired and wireless inputs during the charging process, which could damage the charging module, wired and wireless isolation is usually implemented.

[0068] Figure 2 Schematic diagrams of charging circuits that implement wired-wireless isolation in some implementations, such as... Figure 2 As shown, the charging circuit includes: a wireless charging module, a wired charging module, a wired status detection module, a wired path control module, and a charge pump chip (CP).

[0069] Optionally, the wireless charging module may include a wireless receiver chip (RX) and related devices (e.g., inductors and capacitors), while the wired charging module may include wired input port (Vbus Input) and related devices (e.g., diodes, transistors, etc.).

[0070] After the CP detects power input from the wired charging module, it can control the wired path control module to turn on. At this time, if the wireless charging module receives power, the RX pin (RX_Ctrl) will detect the wired charging module receiving power and will not output power. When there is no power input from the wired charging module, if the wireless charging module receives power, the RX pin will first pull RX_Ctrl high to keep the wired path module off before wireless output. If the RX pin detects power input from the wired charging module at this time, it will turn off its output and then pull RX_Ctrl low to turn on the wired path. This design effectively prevents cross-feeding between wired and wireless inputs. However, this solution requires many external components, and the RX pin needs two pins for isolation, resulting in a complex charging circuit structure and high hardware costs for the smart terminal.

[0071] To address the aforementioned issues, embodiments of this application provide a charging circuit and a smart terminal. By integrating wired and wireless charging isolation control logic within the CP, the application of peripheral devices is reduced, the complexity of the charging circuit structure is lowered, thereby reducing the hardware cost of the smart terminal.

[0072] The technical solution of this application and how it solves the above-mentioned technical problems will be described in detail below with specific embodiments. The following optional embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will be described below with reference to the accompanying drawings.

[0073] Figure 3 This is a schematic diagram of a charging circuit provided in an embodiment of this application, such as... Figure 3 As shown, it includes: a wireless charging module 1, a wired charging module 2, and a charging management module 3, wherein the charging management module 3 is connected to the wireless charging module 1 and the wired charging module 2 respectively.

[0074] Optionally, the wireless charging module 1 is used to input electrical energy by contacting an external wireless charging input terminal (e.g., a wireless charger) based on the principle of electromagnetic induction.

[0075] Optionally, the wired charging module 2 is used to connect to an external wired power supply (wired charger) and receive electrical energy input from the wired power supply.

[0076] Optionally, the charging management module 3 is used to receive electrical energy input from the wireless charging module 1 or the wired charging module 2 and charge the battery.

[0077] Optionally, the charging management module 3 is also configured to disable the wireless charging module 1 when power input is detected in the wired charging module 2, so as to prevent the wired charging module 2 and the wireless charging module 1 from having power input at the same time and causing mutual charging.

[0078] In some implementations, please refer to [the documentation / reference]. Figure 3 The charging management module 3 can be a charge pump charging chip (CP), and includes a first port (VAC), a second port (VBUS), a third port (VAC_PG), and a fourth port (DRV). It should be understood that the above ports can also be referred to as pins.

[0079] Optionally, the wireless charging module 1 includes an inductor L1, a capacitor C1, and a wireless charging management chip RX. The inductor L1 is connected to both the RX and the capacitor C1, the capacitor C1 is also connected to the RX, and the RX is also connected to the second port and the third port of the charging management module 3.

[0080] Optionally, the wired charging module 2 includes a wired input port (Vbus Input) and an overvoltage protection unit 201. The wired input port is connected to an external power supply, the overvoltage protection unit 201, and the first port of the charging management module 3. The overvoltage protection unit 201 is connected to the second and fourth ports of the charging management module 3.

[0081] Optionally, the overvoltage protection unit 201 includes a first switch Q1 and a second switch Q2. The first switch Q1 is connected to an external input port, the second switch Q2 and the fourth port of the charging management module 3, respectively. The second switch Q2 is also connected to the second port and the fourth port of the charging management module 3, respectively.

[0082] Optionally, the charging management module 3 can detect the voltage of the electrical energy input through the first port to determine whether there is electrical energy input in the wired charging module. For example, when the voltage detected by the first port is greater than or equal to a first preset voltage (e.g., VAC > VAC Vaild), it is determined that there is electrical energy input in the wired charging module; when the voltage detected by the first port is less than the first preset voltage, it is determined that there is no electrical energy input in the wired charging module.

[0083] Optionally, the charging management module 3 can receive electrical energy from the wireless charging module or the wired charging module through the second port, and use the received electrical energy to charge the battery.

[0084] Optionally, the charging management module 3 can output an indication signal through a third port. This indication signal indicates whether the wired charging module has a power input. Optionally, the indication signal can be a level signal; for example, a low-level indication signal indicates that the wired charging module has a power input, while a high-level indication signal indicates that the wired charging module does not have a power input.

[0085] Optionally, the charging management module 3 can send a drive signal to the overvoltage protection unit through the fourth port to drive the overvoltage protection unit to turn off or on, thereby turning off or on the power supply path between the wired input port and the charging management module 3.

[0086] Optionally, when the charging management module 3 determines that there is power input in the wired charging module through the first port, it can output a low-level signal through the third port. When the RX in the wireless charging module obtains the low-level signal output by the third port, it can determine that there is power input in the wired charging module and shut down the wireless charging output, thereby preventing backflow in wired and wireless charging.

[0087] Optionally, when the overvoltage protection unit is in the ON state, if the charging management module 3 determines through the first port that there is power input to the wired charging module and the voltage of the input power is greater than or equal to a second preset voltage, it can determine that the voltage input to the current wired charging port is too high. The charging management module 3 can then send a drive signal to the overvoltage protection unit through the fourth port to drive the overvoltage protection unit to turn off, thereby shutting down the wired charging path for overvoltage protection. Alternatively, if the charging management module 3 determines through the second port that the voltage of the power input to the wired charging module is greater than or equal to a third preset voltage, it can determine that the voltage input to the current wired charging port is too high. The charging management module 3 can then send a drive signal to the overvoltage protection unit through the fourth port to drive the overvoltage protection unit to turn off, thereby shutting down the wired charging path for overvoltage protection.

[0088] Optionally, when the overvoltage protection unit is in the off state, the charging management module 3 determines through the first port that there is power input to the wired charging module, and the voltage of the input power is greater than the first preset voltage and less than the second preset voltage (the wired input voltage is within the preset range), and determines through the second port that the input voltage is less than the fourth preset voltage (there is no wireless charging input), then sends a drive signal to the overvoltage protection unit through the fourth port to drive the overvoltage protection unit to turn on and open the wired charging path.

[0089] The charging circuit provided in this application includes: a wireless charging module, a charging management module, and a wired charging module; the charging management module is connected to both the wireless charging module and the wired charging module; the charging management module is used to receive electrical energy input from the wireless charging module or the wired charging module, and charge the battery through an output interface; the charging management module is also used to detect whether there is electrical energy input to the wired charging module, and disable the wireless charging module when there is electrical energy input. By integrating the wired / wireless isolation judgment logic into the charging management module, the use of external components is reduced, resulting in a simple structure and low cost.

[0090] Optionally, the following is combined with Figure 4 The charging management module provided in the embodiments of this application will be described.

[0091] Figure 4 This is a schematic diagram of the structure of the charging management module provided in the embodiments of this application, as shown below. Figure 4 As shown, it includes: a first comparison unit 301, a second comparison unit 302, a control unit 303, and a signal output unit 304.

[0092] Optionally, the first comparison unit 301 is connected to the first port, the control unit 303, and the signal output unit 304, respectively. The second comparison unit 302 is connected to the second port and the control unit 303, respectively. The control unit 303 is also connected to the fourth port, and the signal output unit 304 is also connected to the third port.

[0093] Optionally, the first comparison unit 301 is used to acquire the voltage detected by the first port, and output a first comparison signal when the voltage is greater than a first preset voltage. Optionally, the first comparison unit 301 can be a comparator, which can convert the acquired voltage (V) detected by the first port into a comparator signal. VAC ) and a preset first voltage (e.g., V) in the comparator VAC_Vaild Compare V with V. VAC Greater than V VAC_Vaild At that time, the first comparison signal is output.

[0094] Optionally, the first comparison unit 302 is used to acquire the voltage detected by the second port, and output a second comparison signal when the voltage is less than a fourth preset voltage.

[0095] Optionally, the first comparison unit 301 is further configured to output a third comparison signal when the voltage detected at the first port is greater than a second preset voltage. It should be understood that the first comparison unit 301 and the second comparison unit 302 may have multiple preset voltages.

[0096] Optionally, the second comparison unit 302 is further configured to output a fourth comparison signal when the voltage detected by the second port is greater than a third preset voltage.

[0097] Optionally, the signal output unit 304 is configured to output the low-level signal through the third port when it receives the first comparison signal output by the first comparison unit 301.

[0098] Optionally, the control unit 304 is further configured to receive a comparison signal output by the first comparison unit and a comparison signal output by the second comparison unit; if the comparison signal output by the first comparison unit is a first comparison signal and the comparison signal output by the second comparison unit is a second comparison signal, then a drive signal is sent to the overvoltage protection unit through the fourth port to drive the overvoltage protection unit to turn on.

[0099] Optionally, the control unit 304 is further configured to receive a comparison signal output by the first comparison unit or a comparison signal output by the second comparison unit; if the comparison signal output by the first comparison unit is a third comparison signal, or if the comparison signal output by the second comparison unit is a fourth comparison signal, then send a drive signal to the overvoltage protection unit through the fourth port to drive the overvoltage protection unit to turn off.

[0100] In some implementations, please refer to [the documentation / reference]. Figure 4 The signal output unit 304 includes a switching transistor, which is connected to the first comparison unit 301 and the third port, respectively, and is also grounded. Optionally, the switching transistor can be a diode, transistor, MOSFET, etc., and the type of switching transistor is not limited in this embodiment.

[0101] The switching transistor is used to turn on when the first comparison signal is received, and pull the level of the third port low through grounding so that the third port outputs a low-level signal.

[0102] In some implementations, please refer to [the documentation / reference]. Figure 4 The control unit 303 further includes an AND gate 3031 and a controller 3032, wherein the AND gate 3031 is connected to the first comparison unit 301, the second comparison unit 302 and the controller 3032 respectively.

[0103] Optionally, the AND gate is used to receive the comparison signal output by the first comparison unit 301 and the comparison signal output by the second comparison unit 302; if the comparison signal output by the first comparison unit 301 is a first comparison signal and the comparison signal output by the second comparison unit 302 is a second comparison signal, a first enable signal is generated and the first enable signal is sent to the controller 3032 so that the controller 3032 drives the overvoltage protection unit to turn on based on the first enable signal.

[0104] Optionally, the AND gate is further configured to receive the comparison signal output by the first comparison unit 301 and the comparison signal output by the second comparison unit 302; if the comparison signal output by the first comparison unit 301 is a third comparison signal, or the comparison signal output by the second comparison unit 302 is a fourth comparison signal, a second enable signal is generated, and the second enable signal is sent to the controller 3032 so that the controller 3032 drives the overvoltage protection unit to shut down based on the second enable signal.

[0105] In summary, the charging circuit provided in this application embodiment does not require additional circuitry for the control logic of wired and wireless charging, has a simple structure, and low cost. The isolation between wired and wireless charging is controlled by the digital hardware logic of the charging management module, which is also simple.

[0106] This application also provides a smart terminal, which includes the charging circuit provided in at least one of the above embodiments, and will not be described again in the embodiments of this application.

[0107] It is understood that the above scenarios are merely examples and do not constitute a limitation on the application scenarios of the technical solutions provided in the embodiments of this application. The technical solutions of this application can also be applied to other scenarios. For example, as those skilled in the art will know, with the evolution of system architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.

[0108] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0109] The steps in the method of this application embodiment can be adjusted, combined, or deleted according to actual needs.

[0110] The units in the device of this application embodiment can be merged, divided, and deleted according to actual needs.

[0111] In this application, the same or similar terms, concepts, technical solutions and / or application scenario descriptions are generally described in detail only when they appear for the first time. When they appear again, they are generally not repeated for the sake of brevity. When understanding the technical solutions and other contents of this application, the same or similar terms, concepts, technical solutions and / or application scenario descriptions that are not described in detail later can be referred to their previous relevant detailed descriptions.

[0112] In this application, the descriptions of the various embodiments have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0113] The technical features of the present application can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of the present application.

[0114] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A charging circuit, characterized in that, It includes a wireless charging module, a charging management module, and a wired charging module; the charging management module is connected to both the wireless charging module and the wired charging module. The charging management module is used to receive electrical energy input from the wireless charging module or the wired charging module, and to charge the battery through the output interface; The charging management module is also used to disable the wireless charging module when there is power input to the wired charging module.

2. The charging circuit according to claim 1, characterized in that, The charging management module includes a first port, which is connected to the wired charging module. The charging management module is further configured to determine that the wired charging module has electrical energy input when the voltage detected at the first port is greater than a first preset voltage.

3. The charging circuit according to claim 2, characterized in that, The charging management module includes a second port and a third port. The second port is connected to the wired charging module and the wireless charging module, respectively, and the third port is connected to the wireless charging module. The charging management module is used to receive electrical energy output from the wireless charging module or the wired charging module through the second port; The charging management module is also used to output an indication signal through the third port, the indication signal being used to indicate whether there is power input to the wired charging module.

4. The charging circuit according to claim 3, characterized in that, The wireless charging module is used to determine that there is power input to the wired charging module when the indication signal output by the third port is detected to be a low-level signal; and to turn off the wireless charging output.

5. The charging circuit according to claim 4, characterized in that, The wired charging module includes an overvoltage protection unit, and the charging management module also includes a fourth port. The overvoltage protection unit is connected to an external power supply, the second port, and the fourth port, respectively. The charging management module is further configured to send a drive signal to the overvoltage protection unit through the fourth port when the voltage detected at the first port is greater than the second preset voltage, or when the voltage detected at the second port is greater than the third preset voltage, so as to drive the overvoltage protection unit to turn off, thereby performing overvoltage protection; the second preset voltage is greater than the first preset voltage.

6. The charging circuit according to claim 5, characterized in that, The charging management module further includes a first comparison unit and a signal output unit; The first comparison unit is connected to the first port and the signal output unit respectively, and the signal output unit is also connected to the third port; The first comparison unit is used to acquire the voltage detected by the first port, and output a first comparison signal when the voltage is greater than a preset voltage; The signal output unit is used to output the low-level signal through the third port when the first comparison signal is received.

7. The charging circuit according to claim 6, characterized in that, The signal output unit includes a switching transistor, which is connected to the first comparison unit and the third port respectively, and the switching transistor is also grounded; The switching transistor is used to turn on when the first comparison signal is received, and pull the level of the third port low through grounding so that the third port outputs a low-level signal.

8. The charging circuit according to claim 7, characterized in that, The charging management module further includes: a second comparison unit and a control unit; The second comparison unit is connected to the second port, and the control unit is connected to the first comparison unit, the second comparison unit, and the fourth port respectively; The control unit is used for: Receive the comparison signal output by the first comparison unit and the comparison signal output by the second comparison unit; If the comparison signal output by the first comparison unit indicates that the voltage detected by the first port is greater than or equal to the first preset voltage, and the comparison signal output by the second comparison unit indicates that the voltage detected by the second port is less than the fourth preset voltage, then a drive signal is sent to the overvoltage protection unit through the fourth port to drive the overvoltage protection unit to turn on.

9. The charging circuit according to claim 8, characterized in that, The control unit further includes an AND gate and a controller, wherein the AND gate is connected to the first comparison unit, the second comparison unit and the controller respectively; The AND gate is used for: The system receives a first comparison signal output by the first comparison unit and a second comparison signal output by the second comparison unit; the first comparison signal is used to indicate that the voltage detected by the first port is greater than or equal to a first preset voltage; the second comparison signal is used to indicate that the voltage detected by the second port is less than a fourth preset voltage. An enable signal is generated based on the first comparison signal and the second comparison signal, and the enable signal is sent to the controller so that the controller drives the overvoltage protection unit to turn on based on the enable signal.

10. A smart terminal, characterized in that, Includes the charging circuit as described in any one of claims 1 to 9.

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