Discharging control circuit and mobile terminal

Abstract

The utility model provides a discharge control circuit and a mobile terminal, and relates to the technical field of mobile terminals, the circuit comprises a switched capacitor conversion module, a Buck conversion module, a battery node and a load node; and the switched capacitor conversion module and the Buck conversion module are connected in parallel between the battery node and the load node. According to the technical scheme provided by the invention, the switched capacitor conversion module or the Buck conversion module is used for converting the output voltage of the battery node, the electric energy stored in the battery can be fully utilized, and the endurance time of the mobile terminal is prolonged.

Description

Technical Field

[0001] This application relates to the field of mobile terminal technology, specifically to a discharge control circuit and a mobile terminal. Background Technology

[0002] With the widespread use of mobile devices such as smartphones, mobile devices have become indispensable electronic products in people's daily lives. Some existing discharge methods for mobile devices typically include a step-down converter circuit to convert the battery voltage into a system voltage suitable for the mobile device's operation.

[0003] In the process of conceiving and realizing this application, the inventors discovered at least the following technical problems: some discharge methods, while highly efficient in converting battery voltage to system voltage, result in some of the battery's electrical energy not being effectively utilized.

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

[0005] To address the aforementioned technical problems, this application provides a discharge control circuit and a mobile terminal, which can solve the technical problem that existing discharge methods in mobile terminals prevent the effective utilization of some of the battery's electrical energy.

[0006] This application provides a discharge control circuit, including a switched capacitor conversion module, a Buck converter module, a battery node, and a load node; the switched capacitor conversion module and the Buck converter module are connected in parallel between the battery node and the load node.

[0007] Optionally, the above-mentioned switched capacitor conversion module includes a switching conversion module and a flying capacitor; the first terminal of the switching conversion module is connected to the battery node, and the second terminal of the switching conversion module is grounded;

[0008] A flying capacitor is connected in series between the first and third nodes of the switching module;

[0009] The second node of the switching module is connected to the load node.

[0010] Optionally, the switching module includes a first switch, a second switch, a third switch, and a fourth switch connected in series.

[0011] The first node is a common node of the first and second switching transistors, the second node is a common node of the second and third switching transistors, and the third node is a common node of the third and fourth switching transistors.

[0012] Optionally, the switched capacitor conversion module also includes an output measuring capacitor; one end of the output measuring capacitor is connected to the second node, and the other end is grounded.

[0013] Optionally, the Buck step-down converter module includes a fifth switch, a sixth switch, and an inductor;

[0014] The first terminal of the fifth switch is connected to the battery node, the second terminal of the fifth switch is connected to the first terminal of the sixth switch, and the second terminal of the sixth switch is grounded; one end of the inductor is connected to the common node of the fifth and sixth switches, and the other end of the inductor is connected to the load node.

[0015] Optionally, the discharge control circuit may also include a control module;

[0016] The control terminals of the first, second, third, fourth, fifth, and sixth switching transistors are respectively connected to the control module.

[0017] Optionally, when the output voltage of the battery node is greater than or equal to a preset voltage threshold, the fifth and sixth switches are turned off, and the control module is used to control the first, second, third, and fourth switches.

[0018] Optionally, when the output voltage of the battery node is less than a preset voltage threshold, the first, second, third, and fourth switches are turned off, and the control module is used to control the fifth and sixth switches.

[0019] Optionally, the battery node connects to the battery, which is a dual-cell battery.

[0020] This application also provides a mobile terminal, including the above-described discharge control circuit.

[0021] The discharge control circuit and mobile terminal provided in this application include a switched capacitor conversion module, a Buck converter module, a battery node, and a load node. The switched capacitor conversion module and the Buck converter module are connected in parallel between the battery node and the load node. The technical solution provided in this application allows the switched capacitor conversion module to provide a fixed step-down ratio. When the battery power is sufficient, the switched capacitor conversion module can be used to achieve step-down conversion. The Buck converter module can precisely control the output voltage according to the duty cycle of the control signal. When the battery power is low, it can switch to the Buck converter module to achieve step-down conversion, thereby fully utilizing the electrical energy stored in the battery and extending the battery life of the mobile terminal. Attached Figure Description

[0022] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0023] Figure 1 A schematic diagram of the hardware structure of a mobile terminal to implement the various embodiments of this application;

[0024] Figure 2 This is a schematic diagram of the structure of a discharge control circuit provided in the embodiments of this application. Figure 1 ;

[0025] Figure 3 This is a schematic diagram of the structure of a discharge control circuit provided in the embodiments of this application. Figure 2 ;

[0026] Figure 4 This is a schematic diagram of the structure of a switched capacitor conversion module provided in an embodiment of this application;

[0027] Figure 5 This is a schematic diagram of the structure of a Buck step-down converter module provided in the embodiments of this application;

[0028] Figure 6 This is a schematic diagram of the structure of a discharge control circuit provided in the embodiments of this application. Figure 3 ;

[0029] Figure 7 This is a schematic diagram of a charging and discharging control circuit provided in an embodiment of this application.

[0030] The realization of the objectives, functional features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. The accompanying drawings have illustrated specific embodiments of this application, which will be described in more detail below. These drawings and textual descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concepts of this application to those skilled in the art through reference to specific embodiments. Detailed Implementation

[0031] 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.

[0032] Optionally, 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.

[0033] 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.

[0034] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0035] 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.

[0036] Mobile terminals can be implemented in various forms. For example, the mobile 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, and so on.

[0037] The following description will use a mobile terminal as an example. Those skilled in the art will understand that, apart from elements specifically designed for mobile purposes, the construction according to the embodiments of this application can also be applied to fixed-type terminals.

[0038] Please see Figure 1 This is a schematic diagram of the hardware structure of a mobile terminal implementing various embodiments of this application. The mobile 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 mobile terminal structure shown does not constitute a limitation on the mobile terminal. The mobile terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0039] The following is combined with Figure 1 A detailed introduction to each component of the mobile terminal:

[0040] 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.

[0041] WiFi is a short-range wireless transmission technology. Mobile 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 mobile terminal and can be omitted as needed without changing the nature of this application.

[0042] 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 mobile 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 mobile terminal 100 (e.g., call signal receiving sound, message receiving sound, etc.). The audio output unit 103 may include a speaker, earpiece, buzzer, etc.

[0043] 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 medium) 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 mobile 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.

[0044] The mobile 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 mobile terminal 100 is moved to the ear. As a type of motion sensor, an 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 may 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.

[0045] 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.

[0046] 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 mobile terminal. Optionally, user input unit 107 may include touch panel 1071 and other input devices 1072. Touch panel 1071, also known as touch screen, can collect touch operations on or near the user (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: touch detection device and touch controller. Optionally, touch detection device detects the user's touch position and the signal generated by the touch operation, and transmits the signal to touch controller; touch controller receives touch information from touch detection device, converts it into touch point coordinates, and sends it to processor 110, and can receive and execute commands from processor 110. In addition, touch panel 1071 can be implemented using at least two 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.

[0047] 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 mobile 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 mobile terminal. The specific implementation is not limited here.

[0048] Interface unit 108 serves as an interface through which at least one external device can connect to mobile 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 mobile terminal 100, or it may be used to transmit data between mobile terminal 100 and the external device.

[0049] 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.

[0050] The processor 110 is the control center of the mobile terminal. It connects various parts of the mobile 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 mobile terminal, thereby providing overall monitoring of the mobile 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.

[0051] The mobile 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.

[0052] although Figure 1 As not shown, the mobile terminal 100 may also include a Bluetooth module, etc., which will not be described in detail here.

[0053] In some existing discharge methods for mobile terminals, there is usually a step-down converter circuit to convert the battery voltage into a system voltage suitable for use by the mobile terminal.

[0054] Reference Figure 2 , Figure 2 This is a schematic diagram of the structure of a discharge control circuit provided in the embodiments of this application. Figure 1 .

[0055] In some embodiments, the discharge control circuit described above includes a buck converter circuit 201, battery node A, and load node R. Optionally, battery node A is connected to a battery to provide a raw power source.

[0056] One end of the buck converter circuit 201 is connected to battery node A, and the other end is connected to load node R. The buck converter circuit 201 converts the high voltage at battery node A (relative to the voltage required by the load) into a low voltage suitable for use by load node R. Load node R is the node connected to the load of the mobile terminal (such as a processor, display screen, sensors, etc.). Load node R receives a stable voltage output from the buck converter circuit 201, providing the necessary power to the various functional modules of the mobile terminal.

[0057] To ensure battery discharge efficiency, the buck converter circuit 201 typically uses a fixed buck ratio, such as 2:1, 3:1, or 4:1. Optionally, when the buck converter circuit 201 has a buck ratio of 2:1, the voltage at battery node A can be halved before being supplied to the load node R.

[0058] When the battery power is low, the output voltage of battery node A will gradually decrease, and the voltage supplied to load node R by buck converter circuit 201 will also decrease accordingly. When the voltage supplied to load node R by buck converter circuit 201 is lower than the minimum operating voltage of the load, the mobile terminal will automatically shut down.

[0059] Optionally, when the battery power is sufficient, assuming the output voltage of battery node A is 6.8V and the buck conversion circuit 201 has a buck ratio of 2:1, the voltage supplied by the buck conversion circuit 201 to the load node R will remain at 3.4V. When the battery power is low, the output voltage of battery node A will be lower than 6.8V, and thus the voltage supplied by the buck conversion circuit 201 to the load node R will also be lower than 3.4V. When the voltage of the load node R is lower than 3.4V, the mobile terminal may automatically shut down.

[0060] However, when the output voltage of battery node A is below 6.8V, there is usually some remaining power in the battery. If the mobile terminal automatically shuts down when the output voltage of battery node A is below 6.8V, then this part of the power cannot be effectively utilized.

[0061] To address the aforementioned technical problems, this application provides a discharge control circuit, including a switched capacitor conversion module, a Buck converter module, a battery node, and a load node; the switched capacitor conversion module and the Buck converter module are connected in parallel between the battery node and the load node. Since the switched capacitor conversion module can provide a fixed step-down ratio, it can be used for step-down conversion when the battery is fully charged. Furthermore, since the Buck converter module can precisely control the output voltage based on the duty cycle of the control signal, it can be switched to for step-down conversion when the battery is low. This allows for full utilization of the energy stored in the battery, extending the battery life of the mobile terminal.

[0062] Reference Figure 3 , Figure 3 This is a schematic diagram of the structure of a discharge control circuit provided in the embodiments of this application. Figure 2 .

[0063] In some embodiments, the discharge control circuit described above includes a switched capacitor conversion module 301, a Buck step-down conversion module 302, a battery node A, and a load node R.

[0064] Optionally, the switched capacitor conversion module 301 and the Buck step-down conversion module 302 are connected in parallel between the battery node A and the load node R.

[0065] In some implementations, the switched capacitor conversion module 301 can utilize the charging and discharging characteristics of a capacitor to achieve voltage conversion through the switching of a switching transistor. It can achieve either voltage boost or voltage buck, depending on the control logic of the switching transistor and the configuration of the capacitor.

[0066] In some implementations, the switched capacitor conversion module 301 can achieve a specific voltage conversion ratio, such as 2:1, 3:1, 4:1, etc.

[0067] In some implementations, the switched capacitor conversion module 301 may be referred to as a bidirectional charge pump, but this application embodiment does not impose any restrictions.

[0068] In some implementations, the Buck step-down converter module 302 can be a DC-DC converter circuit that controls the output voltage by adjusting the duty cycle of the switching transistor to achieve step-down or step-up functions.

[0069] Compared to the switched capacitor converter module 301, the output voltage of the Buck buck converter module 302 can be precisely controlled by adjusting the switching duty cycle, thus allowing for precise adjustment of the output voltage.

[0070] In this embodiment, the switched capacitor conversion module 301 and the Buck step-down conversion module 302 are connected in parallel between battery node A and load node R. The switched capacitor conversion module 301 or the Buck step-down conversion module 302 can be dynamically selected to perform voltage conversion according to the remaining battery power or the output voltage of battery node A, so as to achieve efficient utilization of battery power.

[0071] Since the switched-capacitor converter module 301 can provide a fixed step-down ratio, it can be used to perform step-down conversion when the battery is fully charged, reducing the battery voltage to the level required by the load. Because the Buck converter module 302 can precisely control the output voltage based on the duty cycle of the control signal, it can be switched to perform step-down conversion when the battery is low. The output voltage is adjusted in real time according to the battery voltage and load requirements to ensure that the output voltage meets the load demands, allowing the mobile terminal to continue operating normally even with a low battery. Because the Buck converter can precisely control the output voltage, it can maximize the use of remaining battery power, extending the mobile terminal's battery life.

[0072] The technical solution provided in this application, by combining the switched capacitor conversion module 301 and the Buck step-down conversion module 302, can dynamically adjust the voltage conversion strategy according to the battery power and load demand, which not only improves the reliability and stability of the system, but also optimizes the utilization efficiency of the battery power, thus helping to extend the battery life of the mobile terminal.

[0073] Based on the content described in the above embodiments, in some embodiments of this application, the switched capacitor conversion module 302 includes a switched conversion module and a flying capacitor; the switched conversion module includes a plurality of switches connected in series, the first end of the switched conversion module is connected to the battery node, and the second end of the switched conversion module is grounded; the flying capacitor is connected in series between the first node and the third node of the switched conversion module; the second node of the switched conversion module is connected to the load node.

[0074] Reference Figure 4 , Figure 4 This is a schematic diagram of a switched capacitor conversion module provided in an embodiment of this application.

[0075] In some embodiments, the switched capacitor conversion module 301 includes a switch conversion module 3011 and a flying capacitor C. FLY With output capacitor C OUT .

[0076] The switching module 3011 includes a first switch Q1, a second switch Q2, a third switch Q3, and a fourth switch Q4 connected in series. One end of the first switch Q1 is connected to battery node A, and the other end is connected to the second switch Q2; one end of the fourth switch Q4 is connected to the third switch Q3, and the other end is grounded.

[0077] Flying capacitor C FLYIt is connected in series between the first node B and the third node D of the switch conversion module 3021. The first node B is the common node of the first switch Q1 and the second switch Q2, and the third node D is the common node of the third switch Q3 and the fourth switch Q4.

[0078] The second node C of the switching module 3021 is connected to the load node R. The second node C is a common node for the second switch Q2 and the third switch Q3.

[0079] Optionally, the aforementioned switching transistors (Q1, Q2, Q3, Q4) can be controllable switching devices such as Metal-Oxide-Semiconductor Field-Effect Transistors (MOSFETs) or Insulated-Gate Bipolar Transistors (IGBTs) to control the switching on and off of the circuit and realize voltage conversion and regulation.

[0080] Optionally, the aforementioned switching transistors (Q1, Q2, Q3, Q4) can be NMOS transistors.

[0081] In some implementations, the output measuring capacitor C OUT One end is connected to the second node C mentioned above (or it can be connected to the load node R), and the other end is grounded.

[0082] In some implementations, the output-side capacitor C OUT It can not only stabilize the output voltage, but also store and release electrical energy.

[0083] In some embodiments, the switched capacitor conversion module 301 described above may include two operating modes:

[0084] Mode 1: Q1 and Q3 are turned on, and battery node A is connected to Q1 and C. FLY The charging channel consisting of Q1 and Q2 provides power to the load node R.

[0085] Mode 2: Q2 and Q4 are on, C FLY Provide power to load node R.

[0086] Since the switched capacitor conversion circuit does not have an inductor, it does not have the ability to continuously adjust the output voltage. It can only achieve step-down or step-up voltage proportionally (such as 2:1, 3:1, 4:1, etc.).

[0087] Reference Figure 5 , Figure 5 This is a schematic diagram of the structure of a Buck step-down converter module provided in an embodiment of this application.

[0088] In some embodiments, the Buck step-down converter module 302 includes a fifth switch Q5, a sixth switch Q6, and an inductor L. The first terminal of the fifth switch Q5 is connected to battery node A, and the second terminal of the fifth switch Q5 is connected to the first terminal of the sixth switch Q6, with the second terminal of the sixth switch Q6 grounded. One end of the inductor L is connected to the common node of the fifth switch Q5 and the sixth switch Q6, and the other end of the inductor L is connected to the load node R.

[0089] Optionally, the fifth switch Q5 and the sixth switch Q6 mentioned above can be controllable switching devices such as MOSFETs or IGBTs, used to control the switching of the circuit and realize voltage conversion and regulation.

[0090] Optionally, the fifth switch Q5 and the sixth switch Q6 mentioned above can be NMOS transistors.

[0091] In some implementations, the output voltage of the Buck buck converter module 302 can be adjusted by controlling the on and off times (i.e., duty cycle) of the fifth switch Q5. A higher duty cycle results in an output voltage closer to the input voltage; a lower duty cycle results in a lower output voltage.

[0092] Reference Figure 6 , Figure 6 This is a schematic diagram of the structure of a discharge control circuit provided in the embodiments of this application. Figure 3 .

[0093] In some embodiments, the discharge control circuit described above further includes a control module 601.

[0094] Optionally, the control terminals of the first switch Q1, the second switch Q2, the third switch Q3, the fourth switch Q4, the fifth switch Q5, and the sixth switch Q6 are respectively connected to the control module 601.

[0095] In some implementations, when the output voltage of battery node A is greater than or equal to a preset voltage threshold, the fifth switch Q5 and the sixth switch Q6 are turned off. The control module 601 can realize the step-down function of the switched capacitor conversion module 301 by controlling the first switch Q1, the second switch Q2, the third switch Q3, and the fourth switch Q4.

[0096] Optionally, when the output voltage of battery node A is less than a preset voltage threshold, the first switch Q1, the second switch Q2, the third switch Q3, and the fourth switch Q4 can be turned off. The control module 601 can realize the buck conversion function of the Buck converter module 302 by controlling the fifth switch Q5 and the sixth switch Q6.

[0097] In some embodiments, the battery can be a dual-cell battery or a single-cell battery; no limitation is made in the embodiments of this application.

[0098] In some implementations, multiple discharge modes can be set based on battery characteristics, and the functionality of the mobile terminal can be limited according to the battery level when the battery is low.

[0099] Optionally, assuming the output voltage of battery node A is 6.8V when the battery is fully charged, and the system voltage requirement of the mobile terminal is 3.4V, then when the battery is low, two discharge modes can be set:

[0100] Discharge mode 1: The output voltage of battery node A is 6.0V to 6.8V. In this case, the Buck step-down converter module 302 mentioned above can still output 3.4V. However, it is necessary to restrict some functions of the mobile terminal, such as restricting the mobile terminal from turning on the flashlight, playing videos, and launching game applications.

[0101] Second-level discharge mode: The output voltage of battery node A is 5.0V~6.0V. In this case, the Buck step-down converter module 302 mentioned above can still output 3.4V. However, it is necessary to limit the use of most functions of the mobile terminal and only retain the use of a few low-power applications. For example, applications such as calls, text messages, and alarm clocks need to be restricted.

[0102] In this embodiment of the application, by setting the above two discharge modes, the mobile terminal can effectively manage its power usage when the battery power is low, thereby extending the battery life and improving the user experience.

[0103] Reference Figure 7 , Figure 7 This is a schematic diagram of a charging and discharging control circuit provided in an embodiment of this application.

[0104] In some embodiments, the above-mentioned charge and discharge control circuit includes a charging interface 701, an overvoltage protection module 702, a switching charging module 703, a charge pump module 704, a switched capacitor conversion module 301, a Buck step-down conversion module 302, and a processor 705.

[0105] The charging interface 701 is an interface used by a mobile terminal to connect to a power source for charging. Optionally, the charging interface 701 can be a USB Type-A interface, a USB Type-C interface, a Micro USB interface, a Lightning interface, a wireless charging interface, etc. The type of the charging interface 701 is not limited in this embodiment.

[0106] The charging interface 701 is connected to the processor 705. During the charging process, the processor 705 can identify the charging protocol, adjust charging parameters (such as voltage and current), and monitor the charging status through communication with the charger.

[0107] The overvoltage protection module 702 can employ an overvoltage protection (OVP) circuit, designed to prevent the power supply from inputting excessively high voltages to sensitive devices. When the input voltage exceeds a preset threshold, the OVP will quickly disconnect the internal switch or shut down the power output to ensure that the load circuit is not damaged due to overvoltage.

[0108] The charge pump module 704 is used to implement various voltage conversion functions, including boost and buck conversion.

[0109] Optionally, the charge pump module 704 can adopt a dual charge pump (charge pump master and charge pump slave) parallel architecture, using a master-slave configuration, to complete boost and buck (e.g., 20V to 10V) conversions.

[0110] The switching charging module 703 is used for battery activation, recharge, and regular charging.

[0111] The switched capacitor conversion module 301, also known as a bidirectional charge pump, supports forward and reverse conversion. During discharge, the battery is stepped down using the switched capacitor conversion module 301 or the Buck converter module 302, and then supplied to the system load through the switched charging module 703. During charging, the battery is boosted by the switched charging module 703 and supplied to the battery.

[0112] The structure and working principle of the switched capacitor conversion module 301 and the Buck step-down conversion module 302 can be referred to the content described in the above embodiments, and will not be repeated here.

[0113] This application also provides a mobile terminal, including the discharge control circuit provided in any of the above embodiments, which will not be described again in this application.

[0114] 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.

[0115] The units in the mobile terminal described in this application embodiment can be merged, divided, and deleted according to actual needs.

[0116] 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.

[0117] 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.

[0118] 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.

[0119] 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 discharge control circuit, characterized in that, This includes switched capacitor conversion modules, Buck converter modules, battery nodes, and load nodes; The switched capacitor conversion module and the Buck step-down conversion module are connected in parallel between the battery node and the load node.

2. The discharge control circuit according to claim 1, characterized in that, The switched capacitor conversion module includes a switching conversion module and a flying capacitor; The first terminal of the switch conversion module is connected to the battery node, and the second terminal of the switch conversion module is grounded. The flying capacitor is connected in series between the first node and the third node of the switching module; The second node of the switching module is connected to the load node.

3. The discharge control circuit according to claim 2, characterized in that, The switching module includes a first switch transistor, a second switch transistor, a third switch transistor, and a fourth switch transistor connected in series. The first node is a common node of the first switch and the second switch, the second node is a common node of the second switch and the third switch, and the third node is a common node of the third switch and the fourth switch.

4. The discharge control circuit according to claim 3, characterized in that, The switched capacitor conversion module also includes an output capacitor. One end of the output capacitor is connected to the second node, and the other end is grounded.

5. The discharge control circuit according to claim 3, characterized in that, The Buck step-down converter module includes a fifth switch, a sixth switch, and an inductor; The first end of the fifth switch is connected to the battery node, the second end of the fifth switch is connected to the first end of the sixth switch, and the second end of the sixth switch is grounded; one end of the inductor is connected to the common node of the fifth and sixth switches, and the other end of the inductor is connected to the load node.

6. The discharge control circuit according to claim 5, characterized in that, The discharge control circuit also includes a control module; The control terminals of the first switch, the second switch, the third switch, the fourth switch, the fifth switch, and the sixth switch are respectively connected to the control module.

7. The discharge control circuit according to claim 6, characterized in that, When the output voltage of the battery node is greater than or equal to a preset voltage threshold, the fifth switch and the sixth switch are turned off; the control module is used to control the first switch, the second switch, the third switch and the fourth switch.

8. The discharge control circuit according to claim 6, characterized in that, When the output voltage of the battery node is less than a preset voltage threshold, the first switch, the second switch, the third switch, and the fourth switch are turned off; the control module is used to control the fifth switch and the sixth switch.

9. The discharge control circuit according to any one of claims 1 to 8, characterized in that, The battery node is connected to a battery, which is a dual-cell battery.

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

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