Charging and discharging control circuit and intelligent terminal

Abstract

The utility model provides a charging and discharging control circuit and an intelligent terminal, and relates to the technical field of intelligent terminals, the circuit comprises an input node, a switch conversion module, a first path selection module, a second path selection module, an inductor, a first capacitor and a load node; the switch conversion module comprises at least two switch tubes connected in series, the first end is connected with the input node, and the second end is grounded; the first path selection module is connected in series between a load node and a first node of the switch conversion module; the second path selection module and the inductor are connected in series between the load node and the first node; or, the first node is connected with the load node, the first path selection module is connected in series between the first end of the inductor and the second node of the switch conversion module, the second path selection module is connected in series between the first end of the inductor and the third node of the switch conversion module, and the second end of the inductor is connected with the load node; the first capacitor is connected in series between the second node and the third node.

Description

Technical Field

[0001] The present application relates to the technical field of smart terminals, and in particular to a charge and discharge control circuit and a smart terminal. Background Art

[0002] With the popularization of smart terminals such as mobile phones, smart terminals have become indispensable electronic products in people's daily lives.

[0003] During the process of conceiving and implementing this application, the inventors discovered at least the following technical issues: Some solutions, typically implemented using an inductor-based buck converter circuit, or a combination of an inductor-based buck converter circuit and a switched capacitor converter circuit, have complex circuit layouts, low conversion efficiency, and are prone to heat generation.

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

[0005] In response to the above technical problems, the present application provides a charge and discharge control circuit and a smart terminal, which can solve the technical problems of the existing charging method of the smart terminal, such as complex circuit layout, low conversion efficiency and easy heat generation.

[0006] The present application provides a charge and discharge control circuit, comprising an input node, a switch conversion module, a first path selection module, a second path selection module, an inductor, a first capacitor, and a load node;

[0007] The switch conversion module includes at least two switch tubes connected in series, a first end of the switch conversion module is connected to the input node, and a second end of the switch conversion module is grounded;

[0008] The first path selection module is connected in series between the load node and the first node of the switch conversion module, and the second path selection module and the inductor are connected in series between the load node and the first node; or the first node is connected to the load node, the first path selection module is connected in series between the first end of the inductor and the second node of the switch conversion module, the second path selection module is connected in series between the first end of the inductor and the third node of the switch conversion module, and the second end of the inductor is connected to the load node;

[0009] The first capacitor is connected in series between the second node and the third node.

[0010] Optionally, the switch conversion module includes a first switch tube, a second switch tube, a third switch tube and a fourth switch tube connected in series in sequence; the first node is a common node of the second switch tube and the third switch tube, the second node is a common node of the first switch tube and the second switch tube, and the third node is a common node of the third switch tube and the fourth switch tube.

[0011] Optionally, the first path selection module includes a fifth switch tube, and the second path selection module includes a sixth switch tube; the charge and discharge control circuit further includes a control module;

[0012] Control ends of the first switch tube, the second switch tube, the third switch tube, the fourth switch tube, the fifth switch tube, and the sixth switch tube are respectively connected to the control module.

[0013] Optionally, the first path selection module is connected in series between the load node and the first node, and the second path selection module and the inductor are connected in series between the load node and the first node.

[0014] Optionally, when the switch conversion module operates in a three-level step-down conversion mode, the fifth switch tube is turned off and the sixth switch tube is turned on.

[0015] Optionally, when the switch conversion module operates in a switched capacitor conversion mode, the fifth switch tube is turned on and the sixth switch tube is turned off.

[0016] Optionally, the first node is connected to the load node, the first path selection module is connected in series between the first end of the inductor and the second node of the switching conversion module, the second path selection module is connected in series between the first end of the inductor and the third node of the switching conversion module, and the second end of the inductor is connected to the load node.

[0017] Optionally, when the switch conversion module operates in a three-level step-down conversion mode, the control module is used to control the first switch tube, the fourth switch tube, the fifth switch tube and the sixth switch tube.

[0018] Optionally, when the switch conversion module operates in a switched capacitor conversion mode, the control module is configured to control the first switch tube, the second switch tube, the third switch tube, and the fourth switch tube.

[0019] Optionally, the charge and discharge control circuit further includes a switched capacitor conversion module; the switched capacitor conversion module includes a seventh switching tube, an eighth switching tube, a ninth switching tube, a tenth switching tube and a second capacitor.

[0020] Optionally, the seventh switch tube, the eighth switch tube, the ninth switch tube and the tenth switch tube are connected in series in sequence; the control ends of the seventh switch tube, the eighth switch tube, the ninth switch tube and the tenth switch tube are respectively connected to the control module; one end of the seventh switch tube is connected to the input node, and one end of the tenth switch tube is grounded.

[0021] Optionally, the fourth node of the switched capacitor conversion module is connected to the load node, and the second capacitor is connected in series between the fifth node and the sixth node of the switched capacitor conversion module; the fourth node is the common node of the eighth switch tube and the ninth switch tube, the fifth node is the common node of the seventh switch tube and the eighth switch tube, and the sixth node is the common node of the ninth switch tube and the tenth switch tube.

[0022] Optionally, the charge and discharge control circuit further includes a power path management unit;

[0023] The control end of the power path management unit is connected to the control module, the first end of the power path management unit is connected to one end of the inductor, and the second end of the power path management unit is connected to one end of the first path selection module.

[0024] Optionally, the load node is connected to a load circuit and a battery; and the load circuit is connected to the battery.

[0025] Optionally, the charge and discharge control circuit further includes a bidirectional power switch tube, one end of the load circuit is connected to a first end of the bidirectional power switch tube, and a second end of the bidirectional power switch tube is connected to the battery.

[0026] The present application also provides an intelligent terminal, comprising the above-mentioned charge and discharge control circuit.

[0027] Through the technical solution provided by this application, a three-level buck conversion circuit and a switched capacitor conversion circuit can be integrated on the same chip, thereby reducing the number of components, reducing circuit complexity, and helping to reduce costs. In addition, through the three-level buck conversion circuit, lower voltage stress can be achieved on the switch tube, thereby reducing switching losses and improving overall conversion efficiency. The switched capacitor conversion circuit assists voltage conversion by charging and discharging capacitors, further reducing energy loss and preventing heat generation during the charging and discharging process. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings herein are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for describing the embodiments. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without inventive work.

[0029] Figure 1 A schematic diagram of the hardware structure of a mobile terminal for implementing various embodiments of the present application;

[0030] Figure 2 Schematic diagram of the structure of a three-level buck conversion circuit provided in an embodiment of the present application;

[0031] Figure 3 A schematic structural diagram of a switched capacitor conversion circuit provided in an embodiment of the present application;

[0032] Figure 4 A schematic diagram of the structure of a charge and discharge control circuit provided in an embodiment of the present application Figure 1 ;

[0033] Figure 5 A schematic diagram of the structure of a charge and discharge control circuit provided in an embodiment of the present application Figure 2 ;

[0034] Figure 6 A schematic diagram of the structure of a charge and discharge control circuit provided in an embodiment of the present application Figure 3 ;

[0035] Figure 7 A schematic diagram of the structure of a charge and discharge control circuit provided in an embodiment of the present application Figure 4 ;

[0036] Figure 8 A schematic diagram of the structure of a charge and discharge control circuit provided in an embodiment of the present application Figure 5 ;

[0037] Figure 9 A schematic diagram of the structure of a charge and discharge control circuit provided in an embodiment of the present application Figure 6 ;

[0038] Figure 10 This is a schematic diagram of the structure of another charge and discharge control circuit provided in the embodiment of the present application. Figure 1 ;

[0039] Figure 11 This is a schematic diagram of the structure of another charge and discharge control circuit provided in the embodiment of the present application. Figure 2 ;

[0040] Figure 12 This is a schematic diagram of the structure of another charge and discharge control circuit provided in the embodiment of the present application. Figure 3 ;

[0041] Figure 13 This is a schematic diagram of the structure of another charge and discharge control circuit provided in the embodiment of the present application. Figure 4 .

[0042] The purpose of this application, its features, and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings. The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and the accompanying text are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of this application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION

[0043] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0044] Optionally, in this document, the terms "comprises", "includes" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. Optionally, components, features, and elements with the same name in different embodiments of the present application may have the same meaning or different meanings, and their specific meanings need to be determined by their explanation in the specific embodiment or further combined with the context of the specific embodiment.

[0045] 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 solely to distinguish information of the same type from one another. For example, without departing from the scope of this disclosure, 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 term "if," as used herein, may be interpreted as "upon," "when," or "in response to a determination." Furthermore, as used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It should be further understood that the terms "comprising" and "including" indicate the presence of the described features, steps, operations, elements, components, items, types, and / or groups, but do not preclude the presence, occurrence, or addition of one or at least two other features, steps, operations, elements, components, items, types, and / or groups. The terms "or," "and / or," "including at least one of the following," etc., as used herein, may be interpreted as inclusive, meaning any one or any combination. For example, “comprising at least one of the following: A, B, C” means “any of the following: A; B; C; A and B; A and C; B and C; A and B and C”; and for another example, “A, B or C” or “A, B and / or C” means “any of the following: A; B; C; A and B; A and C; B and C; A and B and C”. An exception to this definition will occur only when a combination of elements, functions, steps or operations are inherently mutually exclusive in some manner.

[0046] It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application.

[0047] In the subsequent description, the use of suffixes such as "module", "component" or "unit" to represent elements is only for the purpose of facilitating the description of the present application and has no specific meaning. Therefore, "module", "component" or "unit" can be used interchangeably.

[0048] 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, tablet computers, laptop computers, 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.

[0049] The subsequent description will be made by taking a mobile terminal as an example. It will be understood by those skilled in the art that, in addition to components specifically used for mobile purposes, the configuration according to the embodiments of the present application can also be applied to fixed-type terminals.

[0050] See also Figure 1 , which is a schematic diagram of the hardware structure of a mobile terminal for implementing various embodiments of the present 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. Those skilled in the art will understand that Figure 1 The structure of the mobile terminal shown in the figure does not constitute a limitation to the mobile terminal. The mobile terminal may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0051] The following combination Figure 1 A detailed introduction to the various components of the mobile terminal:

[0052] The RF unit 101 can be used to send and receive information or receive signals during calls. Specifically, it receives downlink information from the base station and transmits it to the processor 110 for processing. It also transmits uplink data to the base station. Typically, the RF unit 101 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, and more. Furthermore, the RF unit 101 can communicate with the network and other devices via wireless communication. The above-mentioned 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, etc.

[0053] WiFi is a short-range wireless transmission technology. Mobile terminals can help users send and receive emails, browse web pages, and access streaming media through the WiFi module 102. It provides users with wireless broadband Internet access. Figure 1 The WiFi module 102 is shown, but it is understandable that it is not an essential component of the mobile terminal and can be omitted as needed without changing the essence of the present application.

[0054] The audio output unit 103 can convert audio data received by the RF unit 101 or the WiFi module 102 or stored in the memory 109 into an audio signal and output it as sound when the mobile terminal 100 is in a call signal reception mode, a talk mode, a recording mode, a voice recognition mode, a broadcast reception mode, or the like. Furthermore, the audio output unit 103 can also provide audio output related to a specific function performed by the mobile terminal 100 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 103 may include a speaker, an earpiece, a buzzer, or the like.

[0055] 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 captured by an image capture device (e.g., a camera) in video capture mode or image capture mode. The processed image frames may be displayed on the display unit 106. The image frames processed by the GPU 1041 may be stored in the memory 109 (or other storage medium) or transmitted via the RF unit 101 or the WiFi module 102. The microphone 1042 may receive sound (audio data) in operating modes such as a phone call mode, a recording mode, and a voice recognition mode, and may process such sound into audio data. In the phone call mode, the processed audio (voice) data may be converted into a format that can be transmitted to a mobile communication base station via the RF unit 101. The microphone 1042 may 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.

[0056] 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 brightness of the ambient light, and the proximity sensor can turn off the display panel 1061 and / or the backlight when the mobile terminal 100 is moved to the ear. As a type of motion sensor, the accelerometer sensor can detect the magnitude of acceleration in all directions (generally three axes), and can detect the magnitude and direction of gravity when stationary. It can be used for applications that recognize the posture of the mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer, tapping), etc.; as for other sensors that can be configured in the mobile phone, such as fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., they will not be described here.

[0057] 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.

[0058] The user input unit 107 can be used to receive input digital or character information and generate key signal input related to user settings and function control of the mobile terminal. Optionally, the user input unit 107 may include a touch panel 1071 and other input devices 1072. The touch panel 1071, also known as a touch screen, can collect user touch operations on or near it (such as operations performed by the user using a finger, stylus, or any other suitable object or accessory on or near the touch panel 1071) and drive corresponding connected devices according to a pre-set program. The 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 direction and detects the signal generated by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device and converts it into touch point coordinates, which are then sent to the processor 110. It can also receive commands sent by the processor 110 and execute them. In addition, the touch panel 1071 can be implemented using at least two types: resistive, capacitive, infrared, and surface acoustic wave. In addition to the touch panel 1071, the user input unit 107 may further include other input devices 1072. Optionally, the other input devices 1072 may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control keys, power keys, etc.), a trackball, a mouse, a joystick, etc., and the specifics are not limited here.

[0059] 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. The processor 110 then provides a corresponding visual output on the display panel 1061 according to the type of touch event. Figure 1 In the 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, which is not limited here.

[0060] The interface unit 108 serves as an interface through which at least one external device can be connected to the 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, etc. The interface unit 108 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the mobile terminal 100 or may be used to transmit data between the mobile terminal 100 and an external device.

[0061] Memory 109 can be used to store software programs and various data. Memory 109 may primarily include a program storage area and a data storage area. Optionally, the program storage area may store an operating system and at least one application required for a function (such as a sound playback function or an image playback function); the data storage area may store data generated based on the use of the mobile phone (such as audio data, a phone book, etc.). Furthermore, memory 109 may include high-speed random access memory and non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device.

[0062] Processor 110 is the control center of the mobile terminal, connecting all components of the mobile terminal using various interfaces and circuits. By running or executing software programs and / or modules stored in memory 109 and accessing data stored in memory 109, it executes various functions of the mobile terminal and processes data, thereby providing overall monitoring of the mobile terminal. Processor 110 may include one or more processing units; preferably, processor 110 may integrate an application processor and a modem processor. Optionally, the application processor primarily handles the operating system, user interface, and application programs, while the modem processor primarily handles wireless communications. It is understood that the modem processor may not be integrated into processor 110.

[0063] The mobile terminal 100 may also include a power supply 111 (such as a battery) for supplying power to various components. Preferably, the power supply 111 may be logically connected to the processor 110 through a power management system, thereby managing functions such as charging, discharging, and power consumption through the power management system.

[0064] although Figure 1 Not shown, the mobile terminal 100 may further include a Bluetooth module, etc., which will not be described in detail here.

[0065] Some solutions are usually implemented using an inductor-based buck converter circuit, or a combination of an inductor-based buck converter circuit and a switched capacitor converter circuit. This charging method has a complex circuit layout, low conversion efficiency, and is prone to heat generation.

[0066] In response to the above technical problems, an embodiment of the present application provides a charge-discharge control circuit. By integrating a three-level buck converter circuit and a switched capacitor converter circuit on the same chip, this charge-discharge control circuit can reduce the number of components and circuit complexity, thereby helping to reduce costs. In addition, the three-level buck converter circuit can achieve lower voltage stress on the switch tube, thereby reducing switching losses and improving overall conversion efficiency. The switched capacitor converter circuit assists in voltage conversion by charging and discharging capacitors, which can further reduce energy loss and prevent heating during the charging and discharging process.

[0067] Reference Figure 2 , Figure 2 Schematic diagram of the structure of a three-level buck conversion circuit provided in an embodiment of the present application.

[0068] In some embodiments, the three-level buck converter circuit includes an input node, a flying capacitor C FLY , an inductor L, four switching tubes (Q1, Q2, Q3, Q4) and an output side capacitor C OUT .

[0069] Optionally, the input node provides the DC voltage V required by the entire circuit IN The inductor L is used to store and release energy and smooth the output voltage. The flying capacitor C FLYThe circuit is divided into two voltage levels to achieve a three-level output. The switches (Q1, Q2, Q3, Q4) can be controllable switching devices such as metal-oxide-semiconductor field-effect transistors (MOSFETs) or insulated-gate bipolar transistors (IGBTs), which are used to control the on and off of the circuit to achieve voltage conversion and regulation.

[0070] Optionally, the switching transistors (Q1, Q2, Q3, Q4) may be NMOS transistors.

[0071] Optionally, the operating mode of the three-level buck converter circuit may include the following stages, which are implemented by controlling the on and off of the four switches:

[0072] Phase 1: Q1 and Q4 are turned on, Q2 and Q3 are turned off. At this time, the input voltage V IN Connected directly to the inductor L through Q1, the current increases while flying across the capacitor C FLY Discharged to ground through Q4, providing part of the current for the load R.

[0073] Phase 2: Q1 and Q3 are turned on, Q2 and Q4 are turned off. At this time, the inductor L and the flying capacitor C FLY After being connected in series, they are connected to the load R and provide voltage to the load R. FLY Due to the presence of , the output voltage is lower than Vin, achieving the step-down function.

[0074] Phase 3 (optional): Q2 and Q4 are turned on, Q1 and Q3 are turned off. This phase allows the flying capacitor C FLY Being charged and ready for the next cycle.

[0075] Optionally, the common node between Q2 and Q3 can be referred to as a switch node SW or a first node A (referred to as the first node A in some embodiments of the present application), and the voltage V of the first node A is SW Can be in V IN 、V IN / 2 and ground to achieve three-level conversion.

[0076] Reference Figure 3 , Figure 3 This is a schematic diagram of the structure of a switched capacitor conversion circuit provided in an embodiment of the present application.

[0077] In some embodiments, the switch capacitor conversion circuit includes an input node, a flying capacitor C FLY, four switching tubes (Q1, Q2, Q3, Q4) and an output side capacitor C OUT The input node provides the DC voltage V required by the entire circuit. IN .

[0078] Optionally, the switched capacitor conversion circuit may include two operating modes:

[0079] Mode 1: Q1 and Q3 are on, V IN Through Q1, C FLY , Q3 form a charging channel to provide energy for the load R.

[0080] Mode 2: Q2 and Q4 are on, C FLY Provides energy to the load R.

[0081] Alternatively, since the switched capacitor conversion circuit has no inductor, it does not have the ability to adjust the output voltage continuously, and can achieve voltage reduction or voltage increase in equal proportions, such as 2:1 / 3:1 / 4:1.

[0082] Reference Figure 4 , Figure 4 A schematic diagram of the structure of a charge and discharge control circuit provided in an embodiment of the present application Figure 1 .

[0083] In some embodiments, the charge and discharge control circuit includes an input node, a switch conversion module 401 , a first path selection module 402 , a second path selection module 403 , an inductor L, a first capacitor, and a load node C.

[0084] Optionally, the input node can be used to provide an intermediate bus voltage V PMID .

[0085] The switch conversion module 401 includes at least two switch tubes connected in series. A first end of the switch conversion module 401 is connected to the input node, and a second end is grounded.

[0086] Optionally, the switching conversion module 401 includes a first switch tube Q1, a second switch tube Q2, a third switch tube Q3, and a fourth switch tube Q4 connected in series. One end of the first switch tube Q1 is connected to the input node and the other end is connected to the second switch tube Q2; one end of the fourth switch tube Q4 is connected to the third switch tube Q3 and the other end is grounded.

[0087] In some embodiments, the first path selection module 402 is connected in series between the load node C and the first node A of the switch conversion module 401 , and the second path selection module 403 and the inductor L are connected in series between the load node C and the first node A.

[0088] Optionally, the first capacitor is connected in series between the second node and the third node of the switch conversion module 401 ( Figure 4 not shown).

[0089] In some embodiments, the charge and discharge control circuit further includes an output side capacitor C OUT , output side capacitor C OUT One end is connected to the load node C, and the other end is grounded.

[0090] In some embodiments, the output side capacitor C OUT It can not only stabilize the output voltage, but also store and release energy.

[0091] Optionally, when the first path selection module 402 is turned off and the second path selection module 403 is turned on, the first node A of the switch conversion module 401 can be connected to the load node C through the inductor L. At this time, the switch conversion module 401 combines the first capacitor, the inductor L and the output side capacitor C OUT , which can constitute the above Figure 2 The three-level buck conversion circuit shown in FIG. 4 can be made to operate in a three-level buck conversion mode by controlling the first path selection module 402 to be turned off and the second path selection module 403 to be turned on.

[0092] When the first path selection module 402 is turned on and the second path selection module 403 is turned off, the first node A of the switch conversion module 401 can be directly connected to the load node C through the first path selection module 402 without passing through the inductor L. At this time, the switch conversion module 401 combines the first capacitor and the output side capacitor C OUT , which can constitute the above Figure 3 The switched capacitor conversion circuit shown in FIG. 4 , that is, by controlling the first path selection module 402 to be turned on and the second path selection module 403 to be turned off, the charge and discharge control circuit can be made to operate in a switched capacitor conversion mode.

[0093] The charge-discharge control circuit provided in the embodiments of the present application integrates a three-level buck converter circuit and a switched capacitor converter circuit, thereby reducing the number of components, lowering circuit complexity, and contributing to cost reduction. Furthermore, the three-level buck converter circuit achieves lower voltage stress on the switch tube, thereby reducing switching losses and improving overall conversion efficiency. The switched capacitor converter circuit assists in voltage conversion by charging and discharging capacitors, further reducing energy loss and preventing heating during the charging and discharging process.

[0094] Reference Figure 5 , Figure 5 A schematic diagram of the structure of a charge and discharge control circuit provided in an embodiment of the present application Figure 2 .

[0095] In some embodiments, the switch conversion module 401 includes a first switch Q1, a second switch Q2, a third switch Q3, and a fourth switch Q4 connected in series; the first node A is a common node of the second switch Q2 and the third switch Q3.

[0096] The first capacitor C FLY1 It is connected in series between the second node E and the third node F of the switch conversion module 401. Optionally, the second node E is the common node of the first switch tube Q1 and the second switch tube Q2, and the third node F is the common node of the third switch tube Q3 and the fourth switch tube Q4.

[0097] In some embodiments, the first path selection module 402 includes a fifth switch tube Q5, and the second path selection module 403 includes a sixth switch tube Q6; the load node C is connected to the load circuit R and the battery BAT.

[0098] Optionally, when the fifth switch tube Q5 is turned off and the sixth switch tube Q6 is turned on, the first node A of the switch conversion module 401 can be connected to the load node C through the inductor L. At this time, the switch conversion module 401 is combined with the first capacitor C FLY1 , inductor L and output side capacitor C OUT , which can constitute the above Figure 2 The three-level buck converter circuit shown.

[0099] Optionally, when the fifth switch tube Q5 is turned on and the sixth switch tube Q6 is turned off, the first node A of the switch conversion module 401 can be directly connected to the load node C through the fifth switch tube Q5 without passing through the inductor L. At this time, the switch conversion module 401 is combined with the first capacitor C FLY1 And the output side capacitor C OUT , which can constitute the above Figure 3 The switched capacitor conversion circuit shown.

[0100] Reference Figure 6 , Figure 6 A schematic diagram of the structure of a charge and discharge control circuit provided in an embodiment of the present application Figure 3 .

[0101] In some embodiments, the charge and discharge control circuit includes a chip unit and a peripheral circuit. The chip unit includes a control module 601 and the first switch tube Q1, the second switch tube Q2, the third switch tube Q3, the fourth switch tube Q4, the fifth switch tube Q5, and the sixth switch tube Q6. The peripheral circuit includes a first capacitor C FLY1 , inductor L and output side capacitor C OUT , intermediate bus capacitor C PMID wait.

[0102] Optionally, control ends of the first switch tube Q1 , the second switch tube Q2 , the third switch tube Q3 , the fourth switch tube Q4 , the fifth switch tube Q5 and the sixth switch tube Q6 are respectively connected to the control module 601 .

[0103] Optionally, the chip unit includes an input pin V BUS , intermediate bus power pin PMID, switch pin SW, voltage output pin V OUT , and the first capacitor pin C FP and the second capacitor pin C FN .

[0104] Optionally, input pin V BUS It can be connected to the charging interface, which can be connected to an external charger; the switch pin SW is used to connect the external inductor L; the voltage output pin V OUT It can provide voltage to the load circuit R or the battery BAT; the intermediate bus voltage V provided by the intermediate bus power pin PMID PMID It can also be expressed as input voltage V IN ; First capacitor pin C FP The second capacitor pin C FN A first capacitor C for connecting the periphery FLY1 .

[0105] Optionally, the chip unit may further include other pins, which is not limited in the embodiment of the present application.

[0106] In some embodiments, the chip unit further includes an anti-backflow module, the first end of which is connected to the input pin V BUS , the second end is connected to the intermediate bus power pin PMID, and the control end is connected to the control module 601.

[0107] In some embodiments, the anti-backflow module can be used to prevent the battery BAT from leaking to the input pin V BUS .

[0108] Optionally, the anti-backflow module may include an NMOS tube. Figure 6 The anti-backflow module in the embodiment of the present application includes an NMOS tube Q RB .

[0109] In some embodiments, the control module 601 can control the operating mode of the charge and discharge control circuit.

[0110] Optionally, the control module 601 can control the on / off switching of at least two switches in the chip unit to enable the charge and discharge control circuit to operate in a three-level buck conversion mode or a switched capacitor conversion mode.

[0111] Optionally, the control module 601 can enable the above-mentioned charge and discharge control circuit to operate in a three-level buck conversion mode by controlling the fifth switch tube Q5 to be turned off and the sixth switch tube Q6 to be turned on; and enable the above-mentioned charge and discharge control circuit to operate in a switched capacitor conversion mode by controlling the fifth switch tube Q5 to be turned on and the sixth switch tube Q6 to be turned off.

[0112] Optionally, when the chip unit operates in a three-level buck conversion mode or a switched capacitor conversion mode, Q1 to Q4 correspond to different conduction timings and duty cycles.

[0113] In some embodiments, the chip unit may support a three-level reverse discharge mode, where the battery BAT serves as a power source and the battery voltage is increased through Q1 to Q4 to power a wireless coil or an external wired device.

[0114] In some embodiments, the chip unit may also maintain a switched capacitor reverse discharge mode, where the battery BAT serves as a power source and the battery voltage is doubled through Q1 to Q4 to power a wireless coil or an external wired device.

[0115] In some embodiments, the load circuit R and the battery BAT may be directly connected via a PCB board, and the battery BAT directly supplies power to the load circuit R.

[0116] In some embodiments, the load circuit R and the battery BAT may also be connected via a bidirectional power switch tube built into a chip. The bidirectional power switch tube may serve as a power path management unit to control the charging and discharging of the battery.

[0117] The charge-discharge control circuit provided in the embodiments of the present application utilizes a switched capacitor conversion circuit that reuses some of the switches in the three-level buck conversion circuit, thereby reducing the number of switches. This results in a compact and low-cost charge-discharge control circuit structure and chip unit, while combining the advantages of both a three-level buck conversion circuit and a switched capacitor conversion circuit. Furthermore, the three-level buck conversion circuit and the switched capacitor conversion circuit share the flying capacitor and output-side capacitor, further reducing the size of the power conversion structure.

[0118] Reference Figure 7 , Figure 7 A schematic diagram of the structure of a charge and discharge control circuit provided in an embodiment of the present application Figure 4 .

[0119] In some embodiments, Figure 6 Based on the charge and discharge control circuit shown above, the charge and discharge control circuit further includes a power path management unit BATFET.

[0120] The control end of the BATFET is connected to the control module 601, the first end of the BATFET is connected to one end of the inductor L, and the second end is connected to one end of the first path selection module 402 (i.e., the voltage output pin V OUT )connect.

[0121] Optionally, C BAT is the battery side capacitance.

[0122] In some embodiments, BATFET can be used for charge and discharge path management. For example, when the above charge and discharge control circuit operates in the three-level buck conversion mode, node A passes through the fifth switch Q5, through the SW node combined with the external inductor L and capacitor C OUT Power is supplied to the load circuit R and at the same time passes through the system power node V SYS Input, after passing through BATFET through the battery voltage node V BAT Charge the battery BAT.

[0123] Optionally, when the above charge and discharge control circuit operates in the three-level reverse discharge mode, the battery BAT is connected to the battery voltage node V BAT After passing through the BATFET, through the system power node V SYS , with external capacitor C OUT And the external inductor L, after the internal path selection switch Q5 and the switch conversion module (Q1, Q2, Q3, Q4) are boosted through the SW node, and then through the Q RB Output to V BUS Node, to power external devices or wireless reverse charging chips.

[0124] When the above charge and discharge control circuit works in the switch capacitor reverse discharge mode, the battery BAT is connected to the battery voltage node V BAT After passing through BATFET, through V OUT The node is boosted by the internal path selection switch Q6 and the switch conversion module (Q1, Q2, Q3, Q4), and then passes through Q RB Output to V BUS Node, to power external devices or wireless reverse charging chips.

[0125] The charge and discharge control circuit provided in the embodiment of the present application can more accurately manage the charge and discharge path while combining the advantages of a three-level buck conversion circuit and a switched capacitor conversion circuit by setting a BATFET in the charge and discharge control circuit.

[0126] Reference Figure 8 , Figure 8 A schematic diagram of the structure of a charge and discharge control circuit provided in an embodiment of the present application Figure 5 .

[0127] In some embodiments, Figure 6 Based on the charge and discharge control circuit shown in FIG, the charge and discharge control circuit further includes a switch capacitor conversion module; the switch capacitor conversion module includes a seventh switch tube Q7, an eighth switch tube Q8, a ninth switch tube Q9, a tenth switch tube Q10 and a second capacitor C FLY2 .

[0128] The seventh switch transistor Q7, the eighth switch transistor Q8, the ninth switch transistor Q9, and the tenth switch transistor Q10 are connected in series in sequence, and the control ends of the seventh switch transistor Q7, the eighth switch transistor Q8, the ninth switch transistor Q9, and the tenth switch transistor Q10 are respectively connected to the control module 601; one end of the seventh switch transistor Q7 is connected to the input pin PMID, and one end of the tenth switch transistor Q10 is grounded.

[0129] The fourth node B of the switch capacitor conversion module is connected to the load node C; the second capacitor C FLY2 connected in series between the fifth node and the sixth node; the fourth node B is the common node of the eighth switch tube Q8 and the ninth switch tube Q9, the fifth node is the common node of the seventh switch tube Q7 and the eighth switch tube Q8, and the sixth node is the common node of the ninth switch tube Q9 and the tenth switch tube Q10.

[0130] Optionally, the capacitor pin C F1P and capacitor pin C F1N A first capacitor C for connecting the periphery FLY1 , capacitor pin C F2P and capacitor pin C F2N A second capacitor C for connecting the periphery FLY2 .

[0131] The charge and discharge control circuit provided in the embodiment of the present application is Figure 6 The charge and discharge control circuit shown in the figure adds a set of switched capacitors. When the charge and discharge control circuit operates in the switched capacitor conversion mode, the two sets of switched capacitors operate in parallel, which can improve the conversion power of the switched capacitor conversion circuit.

[0132] Reference Figure 9 , Figure 9 A schematic diagram of the structure of a charge and discharge control circuit provided in an embodiment of the present application Figure 6 .

[0133] In some embodiments, Figure 6 Based on the charge and discharge control circuit shown above, the charge and discharge control circuit further includes a switched capacitor conversion circuit and a BATFET.

[0134] Optionally, the position and function of the BATFET in the charge and discharge control circuit can refer to Figure 7 The position and function of the switch capacitor conversion circuit in the charge and discharge control circuit can be referred to in the description of the embodiment shown. Figure 8 The description in the illustrated embodiment will not be repeated in the embodiments of this application.

[0135] Reference Figure 10 , Figure 10 This is a schematic diagram of the structure of another charge and discharge control circuit provided in the embodiment of the present application. Figure 1 .

[0136] In some embodiments, the charge and discharge control circuit includes an input node, a switch conversion module 1001 , a first path selection module 1002 , a second path selection module 1003 , an inductor L, a first capacitor, and a load node.

[0137] Optionally, the input node can be used to provide an intermediate bus voltage V PMID .

[0138] Optionally, the switch conversion module 1001 includes at least two switch tubes connected in series, a first end of the switch conversion module 1001 is connected to the input node, and a second end is grounded.

[0139] Optionally, the switching conversion module 1001 includes a first switch tube Q1, a second switch tube Q2, a third switch tube Q3, and a fourth switch tube Q4 connected in series. One end of the first switch tube Q1 is connected to the input node and the other end is connected to the second switch tube Q2; one end of the fourth switch tube Q4 is connected to the third switch tube Q3 and the other end is grounded.

[0140] In some embodiments, the first node A of the switching conversion module 1001 is connected to the load node C, the first path selection module 1002 is connected in series between the first end of the inductor L and the second node E of the switching conversion module 1001, the second path selection module 1003 is connected in series between the first end of the inductor L and the third node F of the switching conversion module 1001, and the second end of the inductor L is connected to the load node C.

[0141] The first capacitor is connected in series between the second node E and the third node F of the switching conversion module 1001 ( Figure 10 not shown).

[0142] In some embodiments, the charge and discharge control circuit further includes an output side capacitor C OUT , output side capacitor C OUT One end is connected to the load node C, and the other end is grounded.

[0143] Optionally, when the first path selection module 402 and the second path selection module 403 are simultaneously connected to the above-mentioned charge and discharge control circuit, the switch conversion module 401 can be connected to the load node C through the inductor L. At this time, the switch conversion module 1001 combines the first capacitor, the inductor L and the output side capacitor C OUT , which can constitute the above Figure 2 The three-level buck conversion circuit shown in FIG. 4 is configured such that by selecting the first path selection module 402 and the second path selection module 403 to be connected to the charge and discharge control circuit, the charge and discharge control circuit can be made to operate in a three-level buck conversion mode.

[0144] In the case that neither the first path selection module 402 nor the second path selection module 403 is connected to the above-mentioned charge and discharge control circuit, the first node of the switch conversion module 1001 can be directly connected to the load node C without passing through the inductor L. At this time, the switch conversion module 1001 is combined with the first capacitor and the output side capacitor C OUT , which can constitute the above Figure 3 The switched capacitor conversion circuit shown.

[0145] The charge-discharge control circuit provided in the embodiments of the present application integrates a three-level buck converter circuit and a switched capacitor converter circuit, thereby reducing the number of components, lowering circuit complexity, and contributing to cost reduction. Furthermore, the three-level buck converter circuit achieves lower voltage stress on the switch tube, thereby reducing switching losses and improving overall conversion efficiency. The switched capacitor converter circuit assists in voltage conversion by charging and discharging capacitors, further reducing energy loss and preventing heating during the charging and discharging process.

[0146] Reference Figure 11 , Figure 11 This is a schematic diagram of the structure of another charge and discharge control circuit provided in the embodiment of the present application. Figure 2 .

[0147] In some embodiments, the switching conversion module 1001 includes a first switch Q1, a second switch Q2, a third switch Q3, and a fourth switch Q4 connected in series; the first node A is a common node of the second switch Q2 and the third switch Q3.

[0148] The first capacitor C FLY1 It is connected in series between the second node E and the third node F of the switch conversion module 1001. The second node E is the common node of the first switch tube Q1 and the second switch tube Q2, and the third node F is the common node of the third switch tube Q3 and the fourth switch tube Q4.

[0149] In some embodiments, the first path selection module 1002 includes a fifth switch tube Q5, and the second path selection module 1003 includes a sixth switch tube Q6; the load node C is connected to the load circuit R and the battery BAT.

[0150] When the first switch tube Q1, the fourth switch tube Q4, the fifth switch tube Q5, and the sixth switch tube Q6 are connected at the same time, the first node A can be connected to the load node C through the inductor L. At this time, the first switch tube Q1, the fourth switch tube Q4, the fifth switch tube Q5, and the sixth switch tube Q6 are connected in combination with the first capacitor C. FLY1 , inductor L and output side capacitor C OUT , which can constitute the above Figure 2 The three-level buck converter circuit shown.

[0151] When the first switch tube Q1, the second switch tube Q2, the third switch tube Q3 and the fourth switch tube Q4 are connected at the same time, the first node A can be directly connected to the load node C without passing through the inductor L. At this time, the first switch tube Q1, the second switch tube Q2, the third switch tube Q3 and the fourth switch tube Q4 are combined with the first capacitor C. FLY1 And the output side capacitor C OUT , which can constitute the above Figure 3 The switched capacitor conversion circuit shown.

[0152] Reference Figure 12 , Figure 12 This is a schematic diagram of the structure of another charge and discharge control circuit provided in the embodiment of the present application. Figure 3 .

[0153] In some embodiments, the charge and discharge control circuit includes a chip unit and a peripheral circuit. The chip unit includes a control module 1201 and the first switch tube Q1, the second switch tube Q2, the third switch tube Q3, the fourth switch tube Q4, the fifth switch tube Q5, and the sixth switch tube Q6.

[0154] The control terminals of the first switch tube Q1, the second switch tube Q2, the third switch tube Q3, the fourth switch tube Q4, the fifth switch tube Q5 and the sixth switch tube Q6 are connected to the control module 1201 respectively. FLY1 , inductor L and output side capacitor C OUT , intermediate bus capacitor C PMID wait.

[0155] Optionally, control ends of the first switch tube Q1 , the second switch tube Q2 , the third switch tube Q3 , the fourth switch tube Q4 , the fifth switch tube Q5 and the sixth switch tube Q6 are respectively connected to the control module 601 .

[0156] In some embodiments, the control module 1201 may be used to control the operating mode of the charge and discharge control circuit.

[0157] Optionally, the control module 1201 may control the on / off switching of at least two transistors in the chip unit to enable the charge and discharge control circuit to operate in a three-level buck conversion mode or a switched capacitor conversion mode.

[0158] Specifically, the control module 1201 can make the above-mentioned charge and discharge control circuit operate in a three-level buck conversion mode by controlling the first switch tube Q1, the fourth switch tube Q4, the fifth switch tube Q5, and the sixth switch tube Q6; and make the above-mentioned charge and discharge control circuit operate in a switched capacitor conversion mode by controlling the first switch tube Q1, the second switch tube Q2, the third switch tube Q3, and the fourth switch tube Q4.

[0159] In some embodiments, the chip unit may support a three-level reverse discharge mode. In this case, the battery BAT serves as a power source, and the battery voltage is increased through the first switch tube Q1, the fourth switch tube Q4, the fifth switch tube Q5, and the sixth switch tube Q6 to power the wireless coil or an external wired device.

[0160] In some embodiments, the chip unit may also maintain a switched capacitor reverse discharge mode, where the battery BAT serves as a power source and the battery voltage is doubled through Q1 to Q4 to power a wireless coil or an external wired device.

[0161] In some embodiments, the load circuit R and the battery BAT may be directly connected via a PCB board, and the battery BAT directly supplies power to the load circuit R.

[0162] In some embodiments, the load circuit R and the battery BAT may also be connected via a bidirectional power switch tube built into a chip. The bidirectional power switch tube may serve as a power path management unit to control the charging and discharging of the battery.

[0163] The charge-discharge control circuit provided in the embodiments of the present application utilizes a switched capacitor conversion circuit that reuses some of the switches in the three-level buck conversion circuit, thereby reducing the number of switches. This results in a compact and low-cost charge-discharge control circuit structure and chip unit, while combining the advantages of both a three-level buck conversion circuit and a switched capacitor conversion circuit. Furthermore, the three-level buck conversion circuit and the switched capacitor conversion circuit share the flying capacitor and output-side capacitor, further reducing the size of the power conversion structure.

[0164] Reference Figure 13 , Figure 13 This is a schematic diagram of the structure of another charge and discharge control circuit provided in the embodiment of the present application. Figure 4 .

[0165] In some embodiments, Figure 12 Based on the charge and discharge control circuit shown in FIG, the charge and discharge control circuit further includes a switch capacitor conversion module; the switch capacitor conversion module includes a seventh switch tube Q7, an eighth switch tube Q8, a ninth switch tube Q9, a tenth switch tube Q10 and a second capacitor C FLY2 .

[0166] Optionally, the seventh switch tube Q7, the eighth switch tube Q8, the ninth switch tube Q9, and the tenth switch tube Q10 are connected in series in sequence, and the control ends of the seventh switch tube Q7, the eighth switch tube Q8, the ninth switch tube Q9, and the tenth switch tube Q10 are respectively connected to the control module 601; one end of the seventh switch tube Q7 is connected to the input pin PMID, and one end of the tenth switch tube Q10 is grounded.

[0167] Optionally, the fourth node B of the switch capacitor conversion module is connected to the load node C; the second capacitor C FLY2 connected in series between the fifth node and the sixth node; the fourth node B is the common node of the eighth switch tube Q8 and the ninth switch tube Q9, the fifth node is the common node of the seventh switch tube Q7 and the eighth switch tube Q8, and the sixth node is the common node of the ninth switch tube Q9 and the tenth switch tube Q10.

[0168] The charge and discharge control circuit provided in the embodiment of the present application is Figure 12 The charge and discharge control circuit shown in the figure adds a set of switched capacitors. When the charge and discharge control circuit operates in the switched capacitor conversion mode, the two sets of switched capacitors operate in parallel, which can improve the conversion power of the switched capacitor conversion circuit.

[0169] In some embodiments, Figure 12 Based on the charge and discharge control circuit shown, the charge and discharge control circuit may further include a power path management unit BATFET, or may include a power path management unit BATFET and a group of switch capacitors at the same time, which will not be described in detail in the embodiments of the present application.

[0170] An embodiment of the present application further provides an intelligent terminal, including the charge and discharge control circuit provided in any of the above embodiments, which will not be described in detail in the embodiments of the present application.

[0171] It is understood that the above scenarios are merely examples and do not limit 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, those skilled in the art will appreciate that with the evolution of system architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of this application will also be applicable to similar technical problems.

[0172] The units in the smart terminal adopted in the embodiment of the present application can be merged, divided and deleted according to actual needs.

[0173] In this application, the same or similar terminology, technical solutions and / or application scenario descriptions are generally only described in detail the first time they appear. When they appear again later, they are generally not repeated for the sake of brevity. When understanding the technical solutions and other contents of this application, for the same or similar terminology, technical solutions and / or application scenario descriptions that are not described in detail later, you can refer to the previous relevant detailed descriptions.

[0174] In this application, the description of each embodiment has its own focus. For parts that are not described or recorded in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0175] The various technical features of the technical solution of this application can be combined arbitrarily. In order to make the description concise, not all possible combinations of the various 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 this application.

[0176] The above are only preferred embodiments of the present application and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A charge and discharge control circuit, characterized in that: The device comprises an input node, a switch conversion module, a first path selection module, a second path selection module, an inductor, a first capacitor and a load node; The switch conversion module includes at least two switch tubes connected in series, a first end of the switch conversion module is connected to the input node, and a second end of the switch conversion module is grounded; The first path selection module is connected in series between the load node and the first node of the switch conversion module, and the second path selection module and the inductor are connected in series between the load node and the first node; or the first node is connected to the load node, the first path selection module is connected in series between the first end of the inductor and the second node of the switch conversion module, the second path selection module is connected in series between the first end of the inductor and the third node of the switch conversion module, and the second end of the inductor is connected to the load node; The first capacitor is connected in series between the second node and the third node.

2. The charge and discharge control circuit according to claim 1, wherein: The switch conversion module includes a first switch tube, a second switch tube, a third switch tube and a fourth switch tube connected in series in sequence; the first node is a common node of the second switch tube and the third switch tube, the second node is a common node of the first switch tube and the second switch tube, and the third node is a common node of the third switch tube and the fourth switch tube.

3. The charge and discharge control circuit according to claim 2, wherein: The first path selection module includes a fifth switch tube, and the second path selection module includes a sixth switch tube; the charge and discharge control circuit also includes a control module; Control ends of the first switch tube, the second switch tube, the third switch tube, the fourth switch tube, the fifth switch tube, and the sixth switch tube are respectively connected to the control module.

4. The charge and discharge control circuit according to claim 3, characterized in that: The first path selection module is connected in series between the load node and the first node, and the second path selection module and the inductor are connected in series between the load node and the first node; When the switch conversion module operates in the three-level step-down conversion mode, the fifth switch tube is turned off and the sixth switch tube is turned on; and / or, When the switch conversion module operates in the switched capacitor conversion mode, the fifth switch tube is turned on and the sixth switch tube is turned off.

5. The charge and discharge control circuit according to claim 3, characterized in that: The first node is connected to the load node, the first path selection module is connected in series between the first end of the inductor and the second node of the switch conversion module, the second path selection module is connected in series between the first end of the inductor and the third node of the switch conversion module, and the second end of the inductor is connected to the load node; When the switch conversion module operates in the three-level step-down conversion mode, the control module is used to control the first switch tube, the fourth switch tube, the fifth switch tube and the sixth switch tube; and / or, When the switch conversion module operates in the switched capacitor conversion mode, the control module is used to control the first switch tube, the second switch tube, the third switch tube and the fourth switch tube.

6. The charge and discharge control circuit according to claim 3, characterized in that: The charge and discharge control circuit further includes a switch capacitor conversion module; the switch capacitor conversion module includes a seventh switch tube, an eighth switch tube, a ninth switch tube, a tenth switch tube and a second capacitor; The seventh switch tube, the eighth switch tube, the ninth switch tube, and the tenth switch tube are connected in series in sequence; the control ends of the seventh switch tube, the eighth switch tube, the ninth switch tube, and the tenth switch tube are respectively connected to the control module; one end of the seventh switch tube is connected to the input node, and one end of the tenth switch tube is grounded; and / or, The fourth node of the switched capacitor conversion module is connected to the load node, and the second capacitor is connected in series between the fifth and sixth nodes of the switched capacitor conversion module; the fourth node is a common node of the eighth switch tube and the ninth switch tube, the fifth node is a common node of the seventh switch tube and the eighth switch tube, and the sixth node is a common node of the ninth switch tube and the tenth switch tube.

7. The charge and discharge control circuit according to any one of claims 3 to 6, characterized in that: The charge and discharge control circuit further includes a power path management unit; The control end of the power path management unit is connected to the control module, the first end of the power path management unit is connected to one end of the inductor, and the second end of the power path management unit is connected to one end of the first path selection module.

8. The charge and discharge control circuit according to any one of claims 1 to 6, characterized in that: The load node is connected to a load circuit and a battery; and the load circuit is connected to the battery.

9. The charge and discharge control circuit according to claim 8, characterized in that: The charge and discharge control circuit further includes a bidirectional power switch tube, one end of the load circuit is connected to a first end of the bidirectional power switch tube, and a second end of the bidirectional power switch tube is connected to the battery.

10. An intelligent terminal, characterized in that: The device comprises the charge and discharge control circuit according to any one of claims 1 to 9.

Images