Direct current converter and electronic device
By using a boost module with resonant capacitors and resonant inductors in the DC-DC converter, the problems of large size, low power density and high switching losses of traditional DC-DC converters are solved, achieving efficient voltage boosting and current balancing, and improving the performance of the converter.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BEIJING XIAOMI MOBILE SOFTWARE CO LTD
- Filing Date
- 2025-05-27
- Publication Date
- 2026-05-29
AI Technical Summary
Traditional DC-DC converters are large in size, have low power density, and high switching losses, while new switched capacitor converters are susceptible to high transient current spikes.
A boost module including resonant capacitors and resonant inductors is used to transmit voltage through parallel and series connections, achieving soft switching, avoiding high transient current spikes, and improving efficiency.
It achieves high power density voltage boost, reduces switching losses, improves converter efficiency, and reduces current surges through current balancing technology.
Smart Images
Figure CN224305664U_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of DC-DC conversion technology, specifically to a DC-DC converter and electronic equipment. Background Technology
[0002] With the continuous advancement of power electronics technology, DC-DC power conversion is gradually developing towards higher power density and higher efficiency. However, traditional DC-DC converters, such as Buck converters and Boost converters, generally use magnetic components such as inductors and transformers to transfer energy, resulting in large size and low power density. At the same time, these converters mostly operate in hard-switching mode, leading to high switching losses and low efficiency.
[0003] In related technologies, various new types of converters have been proposed to improve the performance of DC-DC converters. For example, switched-capacitor converters (SCCs) do not require magnetic components and transfer energy only through switching devices and capacitors, thereby improving the power density of the converter. However, since the capacitors in SCC converters are directly charged / discharged by other capacitors or voltage sources, SCC converters are susceptible to high transient current spikes. Summary of the Invention
[0004] To overcome the problems existing in the related technologies, this disclosure provides a DC converter and electronic device to solve the defects in the related technologies.
[0005] According to a first aspect of the present disclosure, a DC-DC converter is provided, the DC-DC converter comprising:
[0006] The input branch is used to receive the input voltage and output the voltage to the boost branch;
[0007] The boost branch includes multiple boost modules, each boost module including at least one resonant capacitor and at least one resonant inductor, for receiving the voltage output from the input branch in the charging state and outputting voltage to the output branch in the discharging state;
[0008] An output branch is used to receive the voltage output by the plurality of boost modules and output voltage to the outside, wherein the voltage output by the output branch to the outside is higher than the input voltage received by the input branch.
[0009] In one possible embodiment of this disclosure, when the boost module is in a charging state, the at least one resonant capacitor is connected in parallel and then grounded through at least one resonant inductor;
[0010] When the boost module is in a discharging state, the at least one resonant capacitor connected in series is connected to the output branch through at least one resonant inductor.
[0011] In one possible embodiment of this disclosure, when the boost module is in a charging state and a discharging state, the at least one resonant capacitor is connected to the input branch.
[0012] In one possible embodiment of this disclosure, the plurality of boost modules are sequentially and cyclically in a charging state, and while each boost module is in a charging state, the boost module following it is in a discharging state, and the other boost modules are in a disconnected state.
[0013] In one possible embodiment of this disclosure, the boost module includes a first resonant capacitor, a second resonant capacitor, a first resonant inductor, and a second resonant inductor;
[0014] When the boost module is in the charging state, the first resonant capacitor and the second resonant capacitor are connected in parallel and then grounded through the first resonant inductor;
[0015] When the boost module is in a discharging state, the first resonant capacitor and the second resonant capacitor are connected in series and then conducted to the output branch through the second resonant inductor.
[0016] In one possible embodiment of this disclosure, the first terminal of the first resonant capacitor and the first terminal of the second resonant capacitor are connected through a first transistor, and the first transistor conducts unidirectionally from the first resonant capacitor to the second resonant capacitor.
[0017] The second terminal of the first resonant capacitor is connected to the second terminal of the second resonant capacitor through a second transistor, and the second transistor conducts unidirectionally from the first resonant capacitor to the second resonant capacitor.
[0018] A third transistor is provided between the first terminal of the first resonant capacitor and the input branch, and the third transistor conducts unidirectionally between the input branch and the first resonant capacitor.
[0019] A first switch is provided between the second end of the first resonant capacitor and the input branch, a second switch is provided between the input end of the first transistor and the output end of the second transistor, the second end of the second resonant capacitor is grounded in sequence through the first resonant inductor and the third switch, and the first end of the second resonant capacitor is connected to the output branch in sequence through the second resonant inductor and the fourth transistor.
[0020] In one possible embodiment of this disclosure, the boost branch includes three boost modules.
[0021] In one possible embodiment of this disclosure, the input branch includes an input terminal and an input capacitor, the input terminal and the input capacitor are connected in parallel to form a parallel circuit, one end of the parallel circuit is connected to the boost module, and the other end is grounded.
[0022] In one possible embodiment of this disclosure, the output branch includes an output terminal and an output capacitor. The output terminal and the output capacitor are connected in parallel to form a parallel circuit. One end of the parallel circuit is connected to the boost module, and the other end is grounded.
[0023] According to a second aspect of the present disclosure, an electronic device is provided, including a DC-DC converter as provided in any embodiment of the first aspect.
[0024] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects:
[0025] The DC-DC converter provided in this embodiment, through its sequentially arranged and connected input branch, boost branch, and output branch, can boost the received input voltage and output it, thereby completing the DC-DC conversion of the input voltage. Furthermore, the boost branch within the DC-DC converter includes multiple boost modules, ensuring the boost effect of the input voltage. The boost modules utilize a resonant unit composed of a resonant capacitor and a resonant inductor for voltage transfer (i.e., energy transfer). The charging and discharging of the capacitor exhibits a sinusoidal current, allowing the switching devices within the DC-DC converter to operate in a soft-switching state, avoiding high transient current spikes, effectively reducing switching losses, and improving the converter's efficiency. Attached Figure Description
[0026] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.
[0027] Figure 1 This is a schematic diagram of the structure of a DC-DC converter shown in an exemplary embodiment of the present disclosure;
[0028] Figure 2 This is a schematic diagram of the phase relationship of a DC-DC converter shown in an exemplary embodiment of the present disclosure;
[0029] Figure 3 This is a schematic diagram of current balancing in the normal parallel mode of a boost module, as illustrated in an exemplary embodiment of this disclosure;
[0030] Figure 4 This is a schematic diagram of current balancing in an interleaved parallel mode of a boost module, as illustrated in an exemplary embodiment of this disclosure.
[0031] Figure 5 This is a structural block diagram of an electronic device illustrated in an exemplary embodiment of the present disclosure. Detailed Implementation
[0032] 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 numerals 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 disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.
[0033] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The singular forms “a,” “the,” and “the” as used in this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.
[0034] It should be understood that although the terms first, second, third, etc., may be used in this disclosure 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 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 word "if" as used herein may be interpreted as "when," "when," or "in response to determination."
[0035] Based on the technical problems mentioned in the background art, in a first aspect, at least one embodiment of this disclosure provides a DC-DC converter that can be applied to devices with various requirements such as high power, high voltage conversion ratio, and high power density, such as on-board chargers, server power supplies, and new energy vehicle battery charging and discharging management systems.
[0036] Please refer to the appendix. Figure 1 The example shows a schematic diagram of a DC-DC converter. The DC-DC converter includes an input branch 100, a boost branch 200, and an output branch 300.
[0037] The input branch 100 is used to receive the input voltage and output the voltage to the boost branch 200. Optionally, as shown in the attached diagram... Figure 1 As shown, the input branch 100 includes an input terminal V in and input capacitor C in The input terminal V in With the input capacitor C in A parallel circuit is formed, with one end connected to each boost module (e.g., boost modules 201, 202, 203) of the boost branch 200, and the other end grounded. An optional example is the input terminal V. inBy configuring parallel capacitors, the input branch 100 can filter the external input voltage, reducing current surges, high transient current spikes, etc.
[0038] The boost branch 200 includes multiple boost modules, each including at least one resonant capacitor and at least one resonant inductor, for receiving the voltage output from the input branch in a charging state and outputting voltage to the output branch in a discharging state. Optionally, as shown in the attached... Figure 1 As shown, the boost branch 200 may include three boost modules: boost module 201, boost module 202, and boost module 203. It should be understood that... Figure 3 The number of boost modules shown is merely an example, and this disclosure does not limit the number of boost modules.
[0039] For example, a resonant capacitor is a flying capacitor, or a flying capacitor.
[0040] It should be understood that when the boost module is in a charging state, the input branch charges the resonant capacitor and resonant inductor within the boost module; when the boost module is in a discharging state, the resonant capacitor and resonant inductor within the boost module discharge to the output branch. The resonant capacitor and resonant inductor form a resonant unit, which resonates during both the charging and discharging states, thereby increasing the voltage.
[0041] For example, when the boost module is in a charging state, the at least one resonant capacitor is connected in parallel and grounded through at least one resonant inductor; the at least one resonant capacitor is connected to the input branch. When the boost module is in a discharging state, the at least one resonant capacitor is connected in series and grounded to the output branch through at least one resonant inductor; the at least one resonant capacitor is connected to the input branch.
[0042] Optional, as shown in the appendix Figure 1 As shown in the figure, the boost module 201 includes a first resonant capacitor C. 1A Second resonant capacitor C 2A First resonant inductor L 1A Second resonant inductor L 2A When the boost module 201 is in a charging state, the first resonant capacitor C 1A and the second resonant capacitor C 2A After being connected in parallel, the first resonant inductor L 1A Grounded; when the boost module is in a discharge state, the first resonant capacitor C 1A and the second resonant capacitor C 2A After being connected in series, through the second resonant inductor L 2A It is connected to the output branch 300.
[0043] Continue to refer to the appendix Figure 3 The boost module 201 in the middle, the above charging state and discharging state can be realized by the following switching circuit: the first resonant capacitor C 1A The first end (i.e. Figure 3 The first capacitor C 1A The upper end of the second resonant capacitor C 2A The first end (i.e. Figure 3 Second capacitor C 2A The upper end) is connected to the first transistor Q. 1A Connection, the first transistor Q 1A Unidirectional conduction of the first resonant capacitor C 1A To the second resonant capacitor C 2A Such as the first transistor Q 1A It can be a diode, etc. The first resonant capacitor C 1A The second end (i.e. Figure 3 The first capacitor C 1A (lower end) and the second resonant capacitor C 2A The second end (i.e. Figure 3 Second capacitor C 2A The lower end) is connected to the second transistor Q. 2A Connection, the second transistor Q 2A Unidirectional conduction of the first resonant capacitor C 1A To the second resonant capacitor C 2A Such as the second transistor Q 2A It can be a diode, etc. The first resonant capacitor C 1A A third transistor Q is provided between the first end and the input branch 100. 3A The third transistor Q 3A The unidirectional input branch 100 and the first resonant capacitor C 1A Such as the third transistor Q 3A It can be a diode, etc. The first resonant capacitor C 1A A first switch S is provided between the second end and the input branch 100. 1A The first transistor Q 1A The input terminal of the second transistor Q 2A A second switch S is provided between the output terminals. 2A The second resonant capacitor C 2A The second end is sequentially connected to the first resonant inductor L 1A and the third switch S 3A Grounded, the second resonant capacitor C 2A The first end is sequentially connected to the second resonant inductor L 2A and the fourth transistor Q 4A The fourth transistor Q is connected to the output branch 300.4A Unidirectional conduction of the second resonant inductor L 2A To the output branch 300, such as the fourth transistor Q 4A It can be a diode, etc.
[0044] Based on the above circuit structure, when the first switch S 1A Second switch S 2A Disconnect, and the third switch S 3A When the circuit is turned on, the boost module 201 is in a charging state, at which time the first resonant capacitor C 1A and the second resonant capacitor C 2A After being connected in parallel with the first resonant inductor L 1A Resonance is achieved, and the second resonant inductor L 2A Operating in normal linear discharge mode; when the second resonant inductor L 2A At the end of the discharge, the fourth transistor Q 4A Cut off, the first resonant capacitor C 1A and the second resonant capacitor C 2A Parallel to the first resonant inductor L 1A Continue to resonate.
[0045] Based on the above circuit structure, when the first switch S 1A Second switch S 2A The circuit is open, and the third switch S is closed. 3A When disconnected, the boost module 201 is in a charging state, at which time the first resonant capacitor C 1A and the second resonant capacitor C 2A After being connected in series with the second resonant inductor L 2A It resonates and discharges approximately linearly.
[0046] The aforementioned circuit structure enables the boost module 201 to resonate in both charging and discharging states, achieving a dual-resonance coordinated operating mode. Therefore, in light-load regulation mode, the first resonant capacitor C of the boost module 201 at the end of the discharging state... 1A and the second resonant capacitor C 2A Since the voltage is greater than 0, the converter can continuously regulate the voltage in the light-load regulation mode, solving the technical problem in related technologies that DC converters cannot continuously regulate voltage in the light-load regulation mode. In the heavy-load regulation mode, the boost module 201, before or at the end of the discharge state, the first resonant capacitor C 1A and the second resonant capacitor C 2A The voltage has dropped to 0; if the first resonant capacitor C of the boost module 201 is in the discharge state before the discharge ends... 1A and the second resonant capacitor C 2A The voltage has dropped to 0, then the first resonant capacitor C1A and the second resonant capacitor C 2A The voltage will drop to 0 after the second resonant inductor L 2A Continue with linear discharge.
[0047] Instructions are required, and the above content should be combined with the appendix. Figure 3 The step-up module 201 in the text provides a detailed description of the circuit structure, state, and effect of the step-up module. The circuit structure, state, and effect of other step-up modules are the same as those of step-up module 201, and will not be repeated here.
[0048] The output branch 300 is used to receive the voltage output from the plurality of boost modules and output voltage to the outside, wherein the voltage output by the output branch 300 is higher than the input voltage received by the input branch 100. Optionally, as shown in the appendix... Figure 1 As shown, the output branch 300 includes an output terminal V out and output capacitor C out The output terminal V out With the output capacitor C out A parallel circuit is formed, with one end connected to each boost module (e.g., boost modules 201, 202, 203) of the boost branch 200, and the other end grounded. An optional example is the output terminal V. out By configuring parallel capacitors, the voltage output by the output branch 300 to the outside can be filtered, reducing current surges, high transient current spikes, etc.
[0049] The DC-DC converter provided in this embodiment, through its sequentially arranged and connected input branch, boost branch, and output branch, can boost the received input voltage and output it, thereby completing the DC-DC conversion of the input voltage. Furthermore, the boost branch within the DC-DC converter includes multiple boost modules, ensuring the boost effect of the input voltage. The boost modules utilize a resonant unit composed of a resonant capacitor and a resonant inductor for voltage transfer (i.e., energy transfer). The charging and discharging of the capacitor exhibits a sinusoidal current, allowing the switching devices within the DC-DC converter to operate in a soft-switching state, avoiding high transient current spikes, effectively reducing switching losses, and improving the converter's efficiency.
[0050] In some embodiments of this disclosure, the plurality of boost modules are in a charging state in sequence, and while each boost module is in a charging state, the boost module following it is in a discharging state, and the other boost modules are in a disconnected state.
[0051] In this embodiment, each boost module is cyclically switched on for charging, and while each boost module is in charging mode, the next boost module in the following state is simultaneously switched on for discharging. This means that at any given time, only one boost module is in charging mode and only one is in discharging mode. Since the boost modules in charging and discharging modes are connected in parallel to the input branch, their voltages are the same. That is, the voltage charged into the capacitor of the boost module in charging mode is the same as the voltage discharged from the capacitor of the boost module in discharging mode. Because the charging and discharging of the capacitors follows the principle of charge conservation, each boost module achieves current balance during its cyclical discharging process.
[0052] With attachment Figure 1 Taking the DC-DC converter shown as an example, see attached... Figure 2 A schematic diagram illustrating the state switching between the boost modules within the DC-DC converter is shown. First, boost module 201 is in a charging state, while boost module 202 is in a discharging state, i.e. Figure 2 The red line in the middle is conductive; boost module 202 is in a charging state, while boost module 203 is in a discharging state, i.e. Figure 2 The blue line in the middle is conductive; boost module 203 is in a charging state, while boost module 201 is in a discharging state, i.e. Figure 2 The green line is activated; and so on, in a continuous cycle.
[0053] The current balancing mechanism works as follows: For phase A, capacitors C1 and C2 are charged using the red phase A current. Then, C1 and C2 are discharged using the phase C current. Because phases A and C operate in a 120° alternating pattern, the discharge current for phase A is primarily provided by phase C. Similarly, for phase B, the two capacitors are charged using the blue phase B current, and discharged using the red phase A current. For phase C, the capacitors are charged using the green phase C current, and discharged using the blue phase B current. According to the principle of charge conservation, the amount of charge charged and discharged is equal for each capacitor. Therefore, the total charged charge of the capacitors in phase A equals the total discharged charge. Since phase A also charges phase B, the total charge of the capacitors in phases A and C is equal, thus achieving automatic current balance across the three phases.
[0054] In other words, the boost modules 201, 202 and 203 in the DC-DC converter form a three-phase interleaved parallel structure to achieve current balance among the three; and adjacent phases are interleaved by 120°, which can reduce input ripple while achieving automatic current balance.
[0055] Please refer to the appendix. Figure 3The diagram shows a simulation of multiple boost modules in a normal parallel mode. When the inductance is significantly reduced from 10uH to 3uH, the current in phase A increases, with a deviation rate reaching 12%. A balanced effect cannot be achieved.
[0056] Please refer to the appendix. Figure 4 The diagram shows a simulation of multiple boost modules connected in parallel in an alternating manner according to this embodiment. When the current is reduced to 3uH, it can be seen that the current of phase A does not show too much imbalance due to the balancing effect, with a deviation rate of only 3%. The reason why deviation still occurs is that extreme transformation scenarios were simulated, proving that a certain current balancing capability can still be achieved under extreme environments.
[0057] In summary, with Figure 1 Taking the illustrated DC-DC converter as an example, this disclosure proposes a third-order boost module to achieve a 3x voltage boost effect, and improves voltage regulation capability under light loads through a dual-resonant approach; all flying capacitors operate resonantly. Therefore, efficiency is improved by eliminating charge-sharing losses and applying ZCS operation to transistors and diodes. By replacing bulky large capacitors with smaller resonant capacitors, the proposed converter can achieve a smaller size. Secondly, the interleaved improved parallel architecture fully utilizes the charge conservation of the flying capacitors to achieve automatic current balancing between different phases, making it well-suited for high-power applications. Similarly, the number of modules can be easily increased to expand the power application scenarios according to power requirements. Furthermore, the boost module order can be expanded to increase the boost factor according to boost requirements, demonstrating strong scalability.
[0058] According to a second aspect of the present disclosure, an electronic device is provided, including a DC-DC converter as provided in any embodiment of the first aspect.
[0059] Please refer to the appendix. Figure 5 The diagram illustrates, for example, a block diagram of an electronic device. For instance, device 500 could be a mobile phone, computer, digital broadcasting terminal, messaging device, game console, tablet device, medical device, fitness equipment, personal digital assistant, etc.
[0060] Reference Figure 5 The device 500 may include one or more of the following components: processing component 502, memory 504, power supply component 506, multimedia component 508, audio component 510, input / output (I / O) interface 512, sensor component 514, and communication component 516.
[0061] Processing component 502 typically controls the overall operation of device 500, such as operations associated with display, telephone calls, data communication, camera operation, and recording. Processing component 502 may include one or more processors 520 to execute instructions to perform all or part of the steps of the methods described above. Furthermore, processing component 502 may include one or more modules to facilitate interaction between processing component 502 and other components. For example, processing component 502 may include a multimedia module to facilitate interaction between multimedia component 508 and processing component 502.
[0062] Memory 504 is configured to store various types of data to support the operation of device 500. Examples of this data include instructions for any application or method operating on device 500, contact data, phonebook data, messages, pictures, videos, etc. Memory 504 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk.
[0063] The power supply component 506 provides power to the various components of the device 500. The power supply component 506 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power to the device 500.
[0064] Multimedia component 508 includes a screen that provides an output interface between the device 500 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touchscreen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touch, swipe, and gestures on the touch panel. The touch sensors may sense not only the boundaries of the touch or swipe action but also the duration and pressure associated with the touch or swipe operation. In some embodiments, multimedia component 508 includes a front-facing camera and / or a rear-facing camera. When the device 500 is in an operating mode, such as a shooting mode or a video mode, the front-facing camera and / or the rear-facing camera may receive external multimedia data. Each front-facing camera and rear-facing camera may be a fixed optical lens system or have focal length and optical zoom capabilities.
[0065] Audio component 510 is configured to output and / or input audio signals. For example, audio component 510 includes a microphone (MIC) configured to receive external audio signals when device 500 is in an operating mode, such as call mode, recording mode, and voice recognition mode. The received audio signals may be further stored in memory 504 or transmitted via communication component 516. In some embodiments, audio component 510 also includes a speaker for outputting audio signals.
[0066] I / O interface 512 provides an interface between processing component 502 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to, home buttons, volume buttons, power buttons, and lock buttons.
[0067] Sensor assembly 514 includes one or more sensors for providing status assessments of various aspects of device 500. For example, sensor assembly 514 may detect the on / off state of device 500, the relative positioning of components such as the display and keypad of device 500, changes in the position of device 500 or a component of device 500, the presence or absence of user contact with device 500, the orientation or acceleration / deceleration of device 500, and temperature changes of device 500. Sensor assembly 514 may also include a proximity sensor configured to detect the presence of nearby objects without any physical contact. Sensor assembly 514 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, sensor assembly 514 may also include an accelerometer, a gyroscope, a magnetometer, a pressure sensor, or a temperature sensor.
[0068] Communication component 516 is configured to facilitate wired or wireless communication between device 500 and other devices. Device 500 can access wireless networks based on communication standards, such as WiFi, 2G or 3G, 4G or 5G, or combinations thereof. In one exemplary embodiment, communication component 516 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, communication component 516 also includes a near-field communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on radio frequency identification (RFID) technology, Infrared Data Association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.
[0069] In an exemplary embodiment, device 500 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform control of devices such as DC-DC converters by the aforementioned electronic devices.
[0070] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.
[0071] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.
Claims
1. A DC-DC converter, characterized in that, The DC-DC converter includes: The input branch is used to receive the input voltage and output the voltage to the boost branch; The boost branch includes multiple boost modules, each boost module including at least one resonant capacitor and at least one resonant inductor, for receiving the voltage output from the input branch in the charging state and outputting voltage to the output branch in the discharging state; An output branch is used to receive the voltage output by the plurality of boost modules and output voltage to the outside, wherein the voltage output by the output branch to the outside is higher than the input voltage received by the input branch.
2. The DC-DC converter according to claim 1, characterized in that, When the boost module is in the charging state, the at least one resonant capacitor is connected in parallel and then grounded through at least one resonant inductor; When the boost module is in a discharging state, the at least one resonant capacitor connected in series is connected to the output branch through at least one resonant inductor.
3. The DC-DC converter according to claim 2, characterized in that, When the boost module is in charging and discharging states, at least one resonant capacitor is connected to the input branch.
4. The DC-DC converter according to claim 2, characterized in that, The multiple boost modules are in a charging state in sequence, and at the same time as each boost module is in a charging state, the boost module after it is in a discharging state, and the other boost modules are in a disconnected state.
5. The DC-DC converter according to any one of claims 2 to 4, characterized in that, The boost module includes a first resonant capacitor, a second resonant capacitor, a first resonant inductor, and a second resonant inductor; When the boost module is in the charging state, the first resonant capacitor and the second resonant capacitor are connected in parallel and then grounded through the first resonant inductor; When the boost module is in a discharging state, the first resonant capacitor and the second resonant capacitor are connected in series and then conducted to the output branch through the second resonant inductor.
6. The DC-DC converter according to claim 5, characterized in that, The first terminal of the first resonant capacitor and the first terminal of the second resonant capacitor are connected through a first transistor, and the first transistor conducts unidirectionally from the first resonant capacitor to the second resonant capacitor. The second terminal of the first resonant capacitor is connected to the second terminal of the second resonant capacitor through a second transistor, and the second transistor conducts unidirectionally from the first resonant capacitor to the second resonant capacitor. A third transistor is provided between the first terminal of the first resonant capacitor and the input branch, and the third transistor conducts unidirectionally between the input branch and the first resonant capacitor. A first switch is provided between the second end of the first resonant capacitor and the input branch, a second switch is provided between the input end of the first transistor and the output end of the second transistor, the second end of the second resonant capacitor is grounded in sequence through the first resonant inductor and the third switch, and the first end of the second resonant capacitor is connected to the output branch in sequence through the second resonant inductor and the fourth transistor.
7. The DC-DC converter according to claim 1, characterized in that, The boost branch includes three boost modules.
8. The DC-DC converter according to claim 1, characterized in that, The input branch includes an input terminal and an input capacitor. The input terminal and the input capacitor are connected in parallel to form a parallel circuit. One end of the parallel circuit is connected to the boost module, and the other end is grounded.
9. The DC-DC converter according to claim 1, characterized in that, The output branch includes an output terminal and an output capacitor. The output terminal and the output capacitor are connected in parallel to form a parallel circuit. One end of the parallel circuit is connected to the boost module, and the other end is grounded.
10. An electronic device, characterized in that, Includes the DC converter as described in any one of claims 1 to 9.