Voltage regulation circuit, chip, electronic equipment and voltage regulation method

Abstract

The embodiment of the invention discloses a voltage regulation circuit, a chip, electronic equipment and a voltage regulation method. The voltage regulation circuit comprises a conversion module, the conversion module is used for converting input voltage to obtain output voltage, the conversion module comprises a first voltage conversion branch and a second voltage conversion branch, a first charge pump unit and a first inductor are arranged in the first voltage conversion branch, and a second charge pump unit and a second inductor are arranged in the second voltage conversion branch. The second charge pump unit and the second inductor are arranged in the second voltage conversion branch and used for maintaining the voltage of the second transmission end of the conversion module to be constant or maintaining the voltage proportion between the first transmission end and the second transmission end of the conversion module to be constant, and the first voltage conversion branch and the second voltage conversion branch work independently. And the first voltage conversion branch and the second voltage conversion branch work in a phase dislocation manner. In the embodiment of the invention, the loading capacity of the conversion module can be improved, the ripple of the voltage output by the conversion module can be reduced, and the stability and the performance of the voltage regulation circuit are improved.

Description

Technical Field

[0001] The present application relates to the technical field of electronic circuits, and in particular, to a voltage regulation circuit, a chip, an electronic device, and a voltage regulation method. Background Art

[0002] With the rapid development of electronic technology, users have put forward higher and higher requirements for the battery life, charging speed, etc. of electronic devices (such as mobile phones, wearable devices, etc.). Therefore, it is necessary to continuously improve the power management technology of electronic devices.

[0003] Currently, in order to meet the power supply requirements of various device loads in electronic devices and meet the requirements of fast charging, a voltage conversion circuit such as a charge pump (CP) is provided in the terminal device. How to optimize the voltage conversion circuit such as the charge pump to improve the stability and performance of the voltage conversion circuit has always been one of the key concerns in this field. Summary of the Invention

[0004] Embodiments of the present application disclose a voltage regulation circuit, a chip, an electronic device, and a voltage regulation method, which can improve the load-carrying capacity of the conversion module and reduce the ripple of the voltage output by the conversion module, and improve the stability and performance of the voltage regulation circuit.

[0005] Embodiments of the present application disclose a voltage regulation circuit, including:

[0006] A conversion module, configured to convert an input voltage to obtain an output voltage;

[0007] The conversion module includes:

[0008] A first voltage conversion branch, including a first charge pump unit and a first inductor. The first charge pump unit is respectively connected to the first transmission end and the second transmission end of the conversion module. The first inductor is connected to the second transmission end and is connected to the first transmission end through the first charge pump unit. The first charge pump unit and the first inductor are used to keep the voltage of the second transmission end constant, or keep the voltage ratio between the first transmission end and the second transmission end constant; the second transmission end of the conversion module is connected to a load;

[0009] A second voltage conversion branch, including a second charge pump unit and a second inductor. The second charge pump unit is respectively connected to the first transmission end and the second transmission end. The second inductor is connected to the second transmission end and is connected to the first transmission end through the second charge pump unit. The second charge pump unit and the second inductor are used to keep the voltage of the second transmission end constant, or keep the voltage ratio between the first transmission end and the second transmission end constant;

[0010] The first voltage conversion branch and the second voltage conversion branch operate independently, and the first voltage conversion branch and the second voltage conversion branch operate out of phase with each other.

[0011] An embodiment of the present application discloses a chip, including the voltage regulation circuit as described above.

[0012] An embodiment of the present application discloses an electronic device, including the voltage regulation circuit as described above, or including the chip as described above.

[0013] An embodiment of the present application discloses a voltage regulation method, including:

[0014] Converting an input voltage through a conversion module to obtain an output voltage; the conversion module includes a first voltage conversion branch and a second voltage conversion branch;

[0015] Independently controlling the first voltage conversion branch and the second voltage conversion branch to operate out of phase, so as to maintain the voltage at the second transmission end of the conversion module constant through the first charge pump unit and the first inductor in the first voltage conversion branch, and / or to maintain the voltage ratio between the first transmission end and the second transmission end of the conversion module constant through the second charge pump unit and the second inductor in the second voltage conversion branch.

[0016] The voltage regulation circuit, chip, electronic device, and voltage regulation method disclosed in the embodiments of the present application. The voltage regulation circuit includes a conversion module, which is used to convert an input voltage to obtain an output voltage. The conversion module includes a first voltage conversion branch and a second voltage conversion branch. The first charge pump unit and the first inductor in the first voltage conversion branch are used to maintain the voltage at the second transmission end of the conversion module constant or to maintain the voltage ratio between the first transmission end and the second transmission end of the conversion module constant. The second charge pump unit and the second inductor in the second voltage conversion branch are used to maintain the voltage at the second transmission end of the conversion module constant or to maintain the voltage ratio between the first transmission end and the second transmission end of the conversion module constant. Through the first voltage conversion branch and the second voltage conversion branch, the conversion module is enabled to support the functions of keeping the voltage at the second transmission end of the conversion module constant and keeping the voltage ratio between the first transmission end and the second transmission end of the conversion module constant, which can improve the voltage conversion ability of the conversion module. Moreover, the first voltage conversion branch and the second voltage conversion branch each include an inductor, which improves the load-carrying capacity of the conversion module. And the first voltage conversion branch and the second voltage conversion branch operate independently, and the first voltage conversion branch and the second voltage conversion branch operate out of phase, which can reduce the ripple of the voltage output by the conversion module and improve the stability and performance of the voltage regulation circuit. Description of the Drawings

[0017] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings required for the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0018] Figure 1 Schematic diagram of a power supply circuit provided in the related art;

[0019] Figure 2 Application scenario diagram of a voltage regulation circuit in an embodiment;

[0020] Figure 3 Structural block diagram of a voltage regulation circuit in an embodiment;

[0021] Figure 4A Schematic diagram of a power transmission path in an embodiment;

[0022] Figure 4B Schematic diagram of a power transmission path in another embodiment;

[0023] Figure 5A Schematic diagram of the voltage change at the first transmission end and the second transmission end of a transformation module in an embodiment;

[0024] Figure 5B Schematic diagram of the voltage change at the first transmission end and the second transmission end of a transformation module in another embodiment;

[0025] Figure 5C Schematic diagram of the voltage change at the first transmission end and the second transmission end of a transformation module in yet another embodiment;

[0026] Figure 6 Structural block diagram of a transformation module in an embodiment;

[0027] Figure 7 Structural block diagram of a voltage regulation circuit in another embodiment;

[0028] Figure 8 Structural block diagram of a voltage regulation circuit in another embodiment;

[0029] Figure 9 Structural block diagram of a transformation module in another embodiment;

[0030] Figure 10 Circuit schematic diagram of a transformation module in an embodiment;

[0031] Figure 11A Equivalent circuit schematic diagram of a transformation module in an embodiment;

[0032] Figure 11B Schematic diagram of the equivalent circuit of the transformation module for another embodiment;

[0033] Figure 11C Schematic diagram of the voltage change in one embodiment;

[0034] Figure 12 Schematic diagram of the circuit of the transformation module for another embodiment;

[0035] Figure 13 Schematic diagram of the circuit of the transformation module for yet another embodiment;

[0036] Figure 14 Schematic diagram of the circuit in which current sampling resistors are respectively connected in series to the first voltage transformation branch and the second voltage transformation branch of the transformation module in one embodiment;

[0037] Figure 15 Schematic diagram of the circuit for achieving current sharing between the first voltage transformation branch and the second voltage transformation branch of the transformation module in one embodiment;

[0038] Figure 16 Block diagram of the chip in one embodiment;

[0039] Figure 17 Flowchart of the voltage regulation method in one embodiment. Detailed implementation manners

[0040] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without making creative efforts shall fall within the protection scope of the present application.

[0041] It should be noted that the terms "including" and "having" in the embodiments of the present application and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally further include steps or units not listed, or may optionally further include other steps or units inherent to these processes, methods, products, or devices.

[0042] It can be understood that the terms "first", "second", etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, without departing from the scope of this application, the first switch may be referred to as the second switch, and similarly, the second switch may be referred to as the first switch. Both the first switch and the second switch are switches, but they are not the same switch. The term "plurality" used in this application refers to two or more. The term "and / or" used in this application refers to one of the scenarios or any combination of multiple scenarios. The term "connected" used in this application should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be directly connected or indirectly connected through an intermediate medium. It may be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of this application can be understood according to specific circumstances.

[0043] Currently, the power supply solutions for electronic devices mainly include single-battery power supply and dual-battery series power supply. In the dual-battery series power supply solution, a 2:1 charge pump circuit is set in the power supply circuit. This charge pump circuit can achieve step-down processing with a forward 2:1 fixed ratio and step-up processing with a reverse 1:2 fixed ratio.

[0044] Exemplarily, as Figure 1 shown, in the case of battery discharge, the voltage VBAT output by the dual battery is subjected to 2:1 step-down processing by the charge pump circuit to obtain the power supply voltage Vsys, and then the power supply voltage Vsys is provided to the load of the electronic device. In the case of battery charging, the charging voltage Vbus is converted by the charge and discharge management module (Charger) to obtain the power supply voltage Vsys, and then the power supply voltage Vsys is provided to the load of the electronic device. And the power supply voltage Vsys is subjected to 1:2 step-up processing by the charge pump circuit to obtain the charging voltage VBAT to charge the battery.

[0045] Since the supply voltage required by the load in an electronic device is limited by the device, currently, the supply voltage Vsys output to the load generally needs to be maintained at 3.2 to 4.6 V (volts). Since the charge pump circuit is a 2:1 fixed-ratio bidirectional charge pump circuit, the voltage output by the dual batteries is required to be maintained at 6.4 to 9.2 V, that is, the total battery voltage of the dual batteries needs to be maintained at 6.4 to 9.2 V. For the currently used graphite batteries, they can meet this total battery voltage range (the discharge voltage of graphite batteries is usually 3.4 V to 4.5 V). However, with the progress of battery technology, this voltage range cannot meet the discharge voltage ranges of other types of batteries in the future (such as silicon anode batteries, etc.). Therefore, the application of other types of batteries in the future will be greatly restricted.

[0046] Taking the silicon anode battery as an example, the silicon anode battery adds silicon material to the negative electrode material of the current graphite battery, greatly improving the energy density of the battery. The discharge voltage range of the silicon anode battery will further drop to 2.5 V or even lower. Therefore, adopting the solution of the 2:1 fixed-ratio charge pump circuit in the related technology will result in the supply voltage obtained after voltage reduction not being able to meet the power supply requirements of the load, and thus cannot meet the discharge voltage range of future silicon anode batteries and cannot adapt to the charge and discharge requirements of future silicon anode batteries, etc. at lower voltages.

[0047] The embodiments of the present application disclose a voltage regulation circuit, a chip, an electronic device, and a voltage regulation method, which can improve the voltage conversion ability of the conversion module, thereby meeting the charge and discharge voltage ranges of more types of batteries, reducing the application restrictions on other types of batteries, and can also improve the load-carrying capacity of the conversion module and reduce the ripple of the voltage output by the conversion module, improving the stability and performance of the voltage regulation circuit.

[0048] Figure 2 It is an application scenario diagram of the voltage regulation circuit in an embodiment. As Figure 2 shown, the voltage regulation circuit provided by the embodiments of the present application can be applied to the electronic device 210, and the electronic device 210 can include but is not limited to mobile phones, wearable devices (such as smart glasses, smart watches, etc.), tablet computers, vehicle-mounted terminals, laptop computers, PCs (Personal Computers), etc.

[0049] In some embodiments, the electronic device 210 can be connected to the power supply device 220, and the power supply device 220 can include but is not limited to adapters, mobile power supplies, chargers, etc., which are not limited herein.

[0050] The power supply device 220 can be wired to the electronic device 210 through a USB (Universal Serial Bus) interface or the like, and transmit a power supply voltage and / or a power supply current to the electronic device 210. The power supply device 220 can also transmit a power supply voltage and / or a power supply current to the electronic device 210 in a wireless manner, which is not limited herein.

[0051] As Figure 3 shown, in one embodiment, a voltage regulation circuit 300 is provided. The voltage regulation circuit 300 may include a battery module 310, a conversion module 320, a charging interface 330, and a charge and discharge management module 340. Among them, the conversion module 320 can be respectively connected to the battery module 310, the charge and discharge management module 340, and the load, and the charge and discharge management module 340 can also be connected to the charging interface 330 and the load. Further, the first transmission end of the conversion module 320 can be connected to the battery module 310, and the second transmission end of the conversion module 320 can be respectively connected to the charge and discharge management module 340 and the load.

[0052] The battery module 310 can be used to provide a first power supply voltage to the first transmission end of the conversion module 320.

[0053] In some embodiments, the battery module 310 may include one or more batteries. When the battery module 310 includes multiple batteries, the multiple batteries can be connected in series and / or in parallel. The first power supply voltage output by the battery module 310 to the conversion module 320 depends on the battery voltages corresponding to the respective batteries in the battery module 310. For example, if the battery module 310 includes 2 batteries connected in series, the first power supply voltage output by the battery module 310 to the conversion module 320 is equal to the sum of the battery voltages of the 2 batteries connected in series, which is the total battery voltage of the 2 batteries connected in series.

[0054] Exemplarily, the battery module 310 may include a graphite battery, a silicon anode battery, or other types / materials of batteries, which are not limited herein.

[0055] The charging interface 330 can be used to connect to the power supply device. When the charging interface 330 is connected to the power supply device, the charging interface 330 can transmit the second power supply voltage input by the power supply device to the charge and discharge management module 340. The charge and discharge management module 340 is used to convert the second power supply voltage provided by the power supply device to obtain a third power supply voltage, and provide the third power supply voltage to the second transmission end of the conversion module 320.

[0056] Optionally, the charge and discharge management module 340 may include, but is not limited to, a Charger chip. The charge and discharge management module 340 can be used to manage the charging process and / or discharging process of the battery module 310. The charge and discharge management module 340 can support different charging modes, such as constant current charging mode, constant voltage charging mode, and trickle charging mode, etc., so as to ensure that the battery module 310 can be charged in the most suitable charging method at different stages.

[0057] In addition, the charge and discharge management module 340 also has the function of voltage regulation. The charge and discharge management module 340 can convert the electrical signal input by the power supply device into the supply voltage and / or supply current required by the load, so as to supply power to the load. Moreover, the voltage and / or current output by the charge and discharge management module 340 can also charge the battery module 310.

[0058] The conversion module 320 is used to convert the input voltage to obtain an output voltage.

[0059] In the embodiment of the present application, the conversion module 320 can support bidirectional voltage conversion and transmission. The conversion module 320 can convert the voltage input at the first transmission end, and the obtained output voltage is output through the second transmission end. The conversion module 320 can also convert the voltage input at the second transmission end, and the obtained output voltage is output through the first transmission end, realizing bidirectional voltage conversion and transmission.

[0060] In some embodiments, when the battery module 310 discharges, the battery module 310 provides a first supply voltage to the first transmission end of the conversion module 320. The conversion module 320 can be used to step down the first supply voltage to obtain a first output voltage, and output the first output voltage to the load through the second transmission end. The first output voltage can supply power to the load to meet the operation requirements of the load. Exemplarily, as Figure 4A shown, when the battery module 310 discharges, the power transmission path can be as shown in path ①.

[0061] In some embodiments, when the charging interface 330 is connected to the power supply device and the battery module 310 is charging, the charge and discharge management module 340 inputs a third supply voltage to the second transmission end of the conversion module 320. The conversion module 320 can be used to step up the third supply voltage to obtain a second output voltage, and output the second output voltage through the first output end. The second output voltage can charge the battery module 310. Exemplarily, as Figure 4B shown, when the battery module 310 is charging, the power transmission path can be as shown in path ②. Further, the charge and discharge management module 340 can also supply power to the load, and the power transmission path can be as shown in path ③.

[0062] Through the bidirectional conversion module 320, the discharge requirements of the battery module 310 to the load can be met, and the charging requirements for the battery module 310 can also be satisfied, adapting to the charging and discharging requirements of the battery module 310, and the circuit structure is simple and efficient.

[0063] In the embodiments of the present application, the conversion module 320 can support multiple working modes. In different working modes, the conversion processing performed by the conversion module 320 on the input voltage may be different. For example, in different working modes, the conversion ratio of the conversion processing performed by the conversion module 320 on the input voltage may be different. This conversion ratio may refer to the ratio between the voltage input to the conversion module 320 and the voltage output, so as to meet the requirements of the battery module 310 in different charging and discharging scenarios and / or different charging and discharging stages, and meet the power supply requirements of the load.

[0064] In some embodiments, the working modes supported by the conversion module 320 may include a first working mode and a second working mode.

[0065] Among them, the first working mode may be a mode in which the voltage ratio between the first transmission end and the second transmission end of the conversion module 320 is not adjustable, that is, the corresponding conversion ratio of the conversion module 320 is not adjustable. In the first working mode, the conversion ratio of the conversion processing performed by the conversion module 320 on the input voltage is a fixed ratio. For example, in the first working mode, the conversion module 320 performs a step-down processing with a fixed ratio of 2:1 on the first power supply voltage input to the battery module 310, or in the first working mode, the conversion module 320 performs a step-up processing with a fixed ratio of 1:2 on the third power supply voltage input to the charge and discharge management module 340.

[0066] The second working mode may be a mode in which the voltage ratio between the first transmission end and the second transmission end of the conversion module 320 is adjustable, that is, the corresponding conversion ratio of the conversion module 320 is adjustable. In the second working mode, the conversion ratio of the conversion processing performed by the conversion module 320 on the input voltage can be adjusted according to actual needs.

[0067] It should be noted that the above voltage ratio can be the voltage of the first transmission end: the voltage of the second transmission end, or the voltage of the second transmission end: the voltage of the first transmission end, which is not limited herein.

[0068] Furthermore, the second working mode may include a first sub-mode and a second sub-mode.

[0069] The first sub-mode may be a mode in which the voltage of the second transmission end of the conversion module 320 remains constant. In this first sub-mode, the voltage of the first transmission end of the conversion module 320 will change, while the voltage of the second transmission end of the conversion module 320 remains constant.

[0070] Exemplarily, when the battery module 310 discharges, the voltage at the first transmission end of the conversion module 320 is the first power supply voltage provided to the battery module 310, that is, the total battery voltage (discharge voltage) corresponding to the battery module 310. During the discharge process of the battery module 310, the total battery voltage corresponding to the battery module 310 gradually decreases. Therefore, the voltage at the first transmission end of the conversion module 320 gradually decreases. However, in the first sub-mode, the conversion module 320 can maintain the constancy of the first output voltage output to the load at the second transmission end.

[0071] Exemplarily, when the battery module 310 charges, the third power supply voltage output by the conversion module 320 at the second transmission end is provided to the charge and discharge management module 340. The voltage at the first transmission end of the conversion module 320 is the second output voltage output to the battery module 310. During the charging process of the battery module 310, the total battery voltage corresponding to the battery module 310 gradually increases. Therefore, the voltage at the first transmission end of the conversion module 320 (i.e., the second output voltage) also gradually increases. However, in the first sub-mode, the conversion module 320 can maintain the constancy of the third power supply voltage input at the second transmission end.

[0072] The second sub-mode can be a mode in which the voltage ratio between the first transmission end and the second transmission end of the conversion module 320 remains constant. Different from the solution where the conversion ratio corresponding to the conversion module 320 is fixed in the first working mode, in the second sub-mode, although the conversion ratio corresponding to the conversion module 320 remains constant, the conversion ratio corresponding to the conversion module 320 can be set or adjusted according to actual requirements. Further, the voltage ratio corresponding to the second sub-mode is different from the voltage ratio corresponding to the first working mode. For example, taking the voltage ratio as the voltage at the first transmission end of the conversion module 320 divided by the voltage at the second transmission end, in the first working mode, the voltage ratio between the first transmission end and the second transmission end of the conversion module 320 is 2:1. In the second sub-mode of the second working mode, the voltage ratio between the first transmission end and the second transmission end of the conversion module 320 is 3:2 or 4:3, etc., but not limited thereto.

[0073] Exemplarily, when the battery module 310 discharges, the conversion module 320 steps down the first power supply voltage provided to the battery module 310 to obtain the first output voltage. Then, in the second sub-mode, the conversion module 320 can maintain the constancy of the voltage ratio between the first power supply voltage and the first output voltage, that is, maintain the constancy of the step-down ratio.

[0074] Exemplarily, when the battery module 310 is being charged, the conversion module 320 boosts the third power supply voltage provided by the charge and discharge management module 340 to obtain a second output voltage. In the second sub-mode, the conversion module 320 can maintain a constant voltage ratio between the third power supply voltage and the second output voltage, that is, maintain a constant boost ratio.

[0075] Compared with the charge pump circuit in the related art that only supports a fixed conversion ratio, the conversion module 320 provided in the embodiment of the present application not only supports the first working mode with a fixed conversion ratio, but also supports the second working mode with an adjustable conversion ratio. Further, the conversion module 320 supports the function of keeping the voltage of the second transmission end constant and the voltage ratio between the first transmission end and the second transmission end of the conversion module 320 constant, which improves the voltage conversion ability of the conversion module 320, so as to meet the charge and discharge voltage ranges of more types of batteries and reduce the application limitations on other types of batteries.

[0076] In some embodiments, the working mode of the conversion module 320 can be switched according to the total battery voltage of the battery module 310, that is, it can be switched according to the voltage of the first transmission end of the conversion module 320.

[0077] The conversion module 320 is further configured to operate in the first working mode when the voltage of the first transmission end is greater than or equal to the first voltage threshold; and operate in the second working mode when the voltage of the first transmission end is less than the first voltage threshold.

[0078] When the voltage of the first transmission end of the conversion module 320 is greater than or equal to the first voltage threshold, the total battery voltage of the battery module 310 is greater than or equal to the first voltage threshold, indicating that the total battery voltage of the battery module 310 is relatively large. The voltage ratio corresponding to the first working mode can meet the charge and discharge requirements of the battery module 310. Therefore, the conversion module 320 can operate in the first working mode.

[0079] Exemplarily, when the battery module 310 is discharging, if the total battery voltage of the battery module 310 is greater than or equal to the first voltage threshold, indicating that the discharge voltage of the battery module 310 is relatively large, the conversion module 320 can operate in the first working mode, perform a step-down processing of 2:1 on the first power supply voltage provided by the battery module 310 to obtain a first output voltage that meets the load requirements, and supply power to the load based on the first output voltage.

[0080] Exemplarily, when the battery module 310 is being charged, if the total battery voltage of the battery module 310 is greater than or equal to the first voltage threshold, it indicates that the total battery voltage of the battery module 310 has entered a relatively safe range. Then, the conversion module 320 can operate in the first operating mode to perform a 1:2 boost processing on the third supply voltage provided by the charge and discharge management module 340, thereby enabling fast charging of the battery module 310 and improving the charging efficiency.

[0081] When the voltage at the first transmission end of the conversion module 320 is less than the first voltage threshold, the total battery voltage of the battery module 310 is less than the first voltage threshold, indicating that the total battery voltage of the battery module 310 is relatively small. If the conversion module 320 performs voltage conversion according to the fixed conversion ratio corresponding to the first operating mode, it cannot meet the charge and discharge requirements of the battery module 310. Therefore, the conversion module 320 can operate in the second operating mode to adjust the conversion ratio of the conversion module 320 so that the output voltage of the conversion module 320 meets the power supply requirements of the load or the charging requirements of the battery module 310.

[0082] Exemplarily, when the battery module 310 is discharging, if the total battery voltage of the battery module 310 is less than the first voltage threshold, it indicates that the discharge voltage of the battery module 310 is relatively small. If the conversion module 320 processes the first supply voltage provided by the battery module 310 according to a 2:1 buck ratio, the resulting first output voltage may be too small to meet the power supply requirements of the load. Therefore, the conversion module 320 can operate in the second operating mode to maintain the obtained first output voltage at the target voltage required by the load, or maintain the voltage ratio between the first supply voltage and the first output voltage at a 3:2 buck ratio, so that the first output voltage output by the conversion module 320 meets the load requirements and supplies power to the load.

[0083] Exemplarily, when the battery module 310 is being charged, if the total battery voltage of the battery module 310 is less than the first voltage threshold, it indicates that the discharge voltage of the battery module 310 is relatively small. If the conversion module 320 performs a 1:2 boost processing on the third supply voltage provided by the charge and discharge management module 340 according to a 1:2 boost ratio, it may cause the current input to the battery module 310 to be too large, resulting in safety problems such as local overheating or short circuit inside the battery module 310, affecting the service life of the battery module 310. Therefore, the conversion module 320 can operate in the second operating mode to maintain the third supply voltage provided by the charge and discharge management module 340 at the required target voltage, or maintain the voltage ratio between the first supply voltage and the first output voltage at a 2:3 boost ratio, avoiding the current input to the battery module 310 from being too large, thereby extending the service life of the battery module 310.

[0084] Further, the conversion module 320 is further configured to operate in the first sub-mode or the second sub-mode when the voltage at the first transmission end is less than the first voltage threshold and greater than or equal to the second voltage threshold; and to operate in the first sub-mode when the voltage at the first transmission end is less than the second voltage threshold.

[0085] When the voltage at the first transmission end of the conversion module 320 is less than the first voltage threshold and greater than or equal to the second voltage threshold, the total battery voltage of the battery module 310 is less than the first voltage threshold and greater than or equal to the second voltage threshold, indicating that although the total battery voltage of the battery module 310 is relatively small, it has not reached an extremely small level. Therefore, the conversion module 320 can operate in the first sub-mode or the second sub-mode, so that the voltage output by the conversion module 320 is within a suitable voltage range to meet the power supply requirements for the normal operation of the load or the charging requirements of the battery module 310.

[0086] As an implementation manner, when the voltage at the first transmission end of the conversion module 320 is less than the first voltage threshold and greater than or equal to the second voltage threshold, the conversion module 320 can only operate in the second sub-mode to maintain the voltage ratio between the first transmission end and the second transmission end.

[0087] For example, when the battery module 310 discharges, if the total battery voltage of the battery module 310 is less than the first voltage threshold and greater than or equal to the second voltage threshold, the conversion module 320 can operate in the second sub-mode to perform a step-down process of 3:2 on the first supply voltage provided by the battery module 310, so that the second output voltage output to the load is maintained within a certain voltage range to supply power to the load normally.

[0088] For another example, when the battery module 310 is charged, if the total battery voltage of the battery module 310 is less than the first voltage threshold and greater than or equal to the second voltage threshold, the conversion module 320 can operate in the second sub-mode to perform a step-up process of 2:3 on the third supply voltage provided by the charge and discharge management module 340, so that the second output voltage output to the battery module 310 is within a certain voltage range, so that the current input to the battery module 310 is neither too large nor too small, while taking into account the charging efficiency and safety.

[0089] As another implementation manner, the conversion module 320 is further configured to operate in the first sub-mode when the voltage at the first transmission end is less than the first voltage threshold and greater than or equal to the third voltage threshold; and to operate in the second sub-mode when the voltage at the first transmission end is less than the third voltage threshold and greater than or equal to the second voltage threshold.

[0090] For example, when the battery module 310 is discharging, if the total battery voltage of the battery module 310 is less than the first voltage threshold and greater than or equal to the third voltage threshold, it indicates that the discharge voltage of the battery module 310 can meet the power supply requirements for the load to operate with high performance. Then, the conversion module 320 can operate in the first sub-mode to maintain the first output voltage supplied to the load at the required target voltage. This target voltage can be a relatively large voltage value, such as 4V, 4.2V, 4.5V, etc., but is not limited thereto, so that the load can operate with high performance and meet the operating requirements of the electronic device. When the total battery voltage of the battery module 310 drops to less than the third voltage threshold, the conversion module 320 switches to operate in the second sub-mode, so that the second output voltage supplied to the load is maintained within a certain voltage range (less than the target voltage). Although it may not necessarily meet the high-performance operating requirements of the load, it can still enable the load to operate normally.

[0091] When the voltage at the first transmission end of the conversion module 320 is less than the second voltage threshold, it indicates that the discharge voltage of the battery module 310 is extremely low. Then, the conversion module 320 can operate in the first sub-mode to keep the voltage at the second transmission end constant.

[0092] For example, when the battery module 310 is discharging, if the total battery voltage of the battery module 310 is less than the second voltage threshold and the discharge voltage of the battery module 310 is too small, the conversion module 320 can operate in the first sub-mode to maintain the first output voltage supplied to the load at the required target voltage. This target voltage can be a relatively small voltage value, such as 3.2V, 3.3V, etc., but is not limited thereto, to maintain the operation of the load and avoid directly powering off the load, which may affect the user experience.

[0093] Another example is when the battery module 310 is charging. If the total battery voltage of the battery module 310 is less than the second voltage threshold and the total battery voltage of the battery module 310 is too small, the battery module 310 needs to be charged with a small current, otherwise, there may be safety hazards such as overheating and short circuit of the battery module 310. Then, the conversion module 320 can operate in the first sub-mode to maintain the voltage at the second output end (i.e., the third power supply voltage output by the charge and discharge management module 340) at the required target voltage. This target voltage can be a relatively small voltage value, such as 3.2V, 3.3V, etc., but is not limited thereto, which can not only maintain the operation of the load but also avoid charging safety problems.

[0094] The above-mentioned first voltage threshold is greater than the third voltage threshold, and the third voltage threshold is greater than the second voltage threshold. It should be noted that the first voltage threshold, the second voltage threshold, and the third voltage threshold can be set according to actual needs. For the charging process and the discharging process of the battery module 310, the set voltage thresholds can be the same or different. For example, the first voltage threshold corresponding to the charging process of the battery module 310 and the first voltage threshold corresponding to the discharging process of the battery module 310 can be the same or different.

[0095] Exemplarily, Figure 5A FIG. is a schematic diagram of the voltage change of the first transmission end and the second transmission end of the conversion module in an embodiment. As Figure 5A shown, during the discharging process of the battery module 310, if the voltage of the first transmission end (i.e., the discharging voltage of the battery module 310) is greater than or equal to 6.8V, the conversion module 320 operates in the first operating mode, and performs a 2:1 step-down processing on the first supply voltage output by the battery module 310 to obtain a second output voltage (i.e., the voltage of the second transmission end). If the voltage of the first transmission end is less than 6.8V and greater than or equal to 5V, the conversion module 320 operates in the second sub-mode of the second operating mode, and performs a 3:2 step-down processing on the first supply voltage output by the battery module 310 to obtain a second output voltage. If the voltage of the first transmission end is less than 5V, the conversion module 320 operates in the first sub-mode of the second operating mode, and maintains the second output voltage at 3.3V.

[0096] Exemplarily, Figure 5B FIG. is a schematic diagram of the voltage change of the first transmission end and the second transmission end of the conversion module in another embodiment. As Figure 5B shown, during the discharging process of the battery module 310, if the voltage of the first transmission end (i.e., the discharging voltage of the battery module 310) is greater than or equal to 6.8V, the conversion module 320 operates in the first operating mode, and performs a 2:1 step-down processing on the first supply voltage output by the battery module 310 to obtain a second output voltage (i.e., the voltage of the second transmission end). If the voltage of the first transmission end is less than 6.8V and greater than or equal to 6V, the conversion module 320 operates in the first sub-mode of the second operating mode, and maintains the second output voltage at 4V. If the voltage of the first transmission end is less than 6V and greater than or equal to 5V, the conversion module 320 operates in the second sub-mode of the second operating mode, and performs a 3:2 step-down processing on the first supply voltage output by the battery module 310 to obtain a second output voltage. If the voltage of the first transmission end is less than 5V, the conversion module 320 operates in the first sub-mode of the second operating mode, and maintains the second output voltage at 3.3V.

[0097] Exemplarily, Figure 5CSchematic diagram of the voltage changes at the first transmission end and the second transmission end of the conversion module in yet another embodiment. As Figure 5C shown, during the charging process of the battery module 310, if the voltage at the first transmission end (i.e., the total battery voltage of the battery module 310) is less than 5V, the conversion module 320 operates in the first sub-mode of the second operating mode, maintaining the voltage at the second transmission end (i.e., the third supply voltage output by the charge and discharge management module 340) at 3.3V. If the voltage at the first transmission end is less than 6.75V and greater than or equal to 5V, the conversion module 320 operates in the second sub-mode of the second operating mode, performing a 2:3 voltage boost on the third supply voltage output by the charge and discharge management module 340. Then, the ratio of the current input to the conversion module 320 to the charging current input to the battery module 310 is also 2:3, charging the battery module 310. If the voltage at the first transmission end is greater than or equal to 6.74V, the conversion module 320 operates in the first operating mode, performing a 1:2 voltage boost on the third supply voltage output by the charge and discharge management module 340. Then, the ratio of the current input to the conversion module 320 to the charging current input to the battery module 310 is also 1:2, charging the battery module 310.

[0098] In the embodiments of the present application, in addition to supporting voltage conversion with a fixed conversion ratio, the conversion module 320 also supports the function of keeping the voltage at the second transmission end constant and the voltage ratio between the first transmission end and the second transmission end of the conversion module 320 constant, enabling the conversion module 320 to support charging and discharging of the battery module 310 at a lower voltage, meeting the charging and discharging requirements of future silicon anode batteries at a lower voltage.

[0099] In some embodiments, the conversion module 320 can automatically switch the energy transmission direction without the need for an additional controller to control the conversion module 320 to switch the energy transmission direction. When the charging interface 330 is not connected to a power supply device, the load draws a load current from the second transmission end of the conversion module 320, and the battery module 310 enters the discharge state, transmitting electrical energy to the load through the conversion module 320. When the charging interface 330 is connected to a power supply device, if the load current required by the load is less than the current output by the charge and discharge management module 340, while the charge and discharge management module 340 transmits electrical energy to the load, it also transmits electrical energy to the battery module 310 through the conversion module 320, and the battery module 310 enters the charging state. If the load current required by the load is greater than the current output by the charge and discharge management module 340, the conversion module 320 automatically switches the energy transmission direction, and the battery module 310 changes from the charging state to the discharge state, transmitting electrical energy to the load through the conversion module 320. Subsequently, if the load current becomes smaller, the conversion module 320 will switch the energy transmission direction again, and the battery module 310 changes from the discharge state to the charging state.

[0100] According to the change of the load current required by the load, the conversion module 320 can automatically switch the energy transfer direction, so that the battery module 310 can be switched between the charging state and the discharging state. The conversion module 320 can achieve the natural switching of the energy transfer direction without external control switching, which can avoid the problem that when accessing the power supply device, due to the excessive load current required by the load, the battery module 310 fails to switch from the charging state to the discharging state in time, resulting in system power-off and restart, and improves the flexibility and timeliness of the switching of the charging and discharging states of the battery module 310.

[0101] As Figure 6 shown, in some embodiments, the conversion module 320 may include a first voltage conversion branch 322 and a second voltage conversion branch 324. The first voltage conversion branch 322 is respectively connected to the first transmission end (V1 end) and the second transmission end (V2 end) of the conversion module 320, and the second voltage conversion branch 324 is respectively connected to the first transmission end (V1 end) and the second transmission end (V2 end) of the conversion module 320. Further, the first voltage conversion branch 322 and the second voltage conversion branch 324 may be connected in parallel.

[0102] The first voltage conversion branch 322 can convert the voltage input to the conversion module 320 to obtain an output voltage. For example, the first voltage conversion branch 322 can convert the first power supply voltage input to the first transmission end to obtain a first output voltage and output it through the second transmission end; or, the first voltage conversion branch 322 can convert the third power supply voltage input to the second transmission end to obtain a second output voltage and output it through the first transmission end.

[0103] The first voltage conversion branch 322 may include a first charge pump unit 3222 and a first inductor 3224. The first charge pump unit 3222 may be respectively connected to the first transmission end and the second transmission end of the conversion module 320. The first inductor 3224 may be connected to the second transmission end of the conversion module 320 and connected to the first transmission end of the conversion module 320 through the first charge pump unit 3222. The first charge pump unit 3222 and the first inductor 3224 can be used to keep the voltage of the second transmission end constant or keep the voltage ratio between the first transmission end and the second transmission end constant.

[0104] The first charge pump unit 3222 may be a circuit unit composed of switches and capacitors, and the first charge pump unit 3222 can convert the voltage input to the conversion module 320.

[0105] In the above-mentioned first working mode, the voltage ratio between the first transmission end and the second transmission end of the conversion module 320 is not adjustable. Then, only the first charge pump unit 3222 works, and the first inductor 3224 does not work. The first charge pump unit 3222 is used to convert the input voltage of the conversion module 320 at a fixed conversion ratio.

[0106] In the above-mentioned second working mode, the voltage ratio between the first transmission end and the second transmission end of the conversion module 320 is adjustable, and the first charge pump unit 3222 and the first inductor 3224 work together. The operation of the first inductor 3224 means that the path between the first inductor 3224 and the first transmission end and / or the second transmission end of the conversion module 320 is conducted. The first inductor 3224 plays a role in regulating the voltage of the input conversion module 320. By adjusting the conduction duration of the path between the first inductor 3224 and the first transmission end and / or the second transmission end of the conversion module 320, the charging duration and the discharging duration of the first inductor 3224 in one cycle are adjusted, so as to adjust the voltage ratio between the first transmission end and the second transmission end. Further, in the above-mentioned first sub-mode, the first charge pump unit 3222 and the first inductor 3224 jointly maintain the voltage of the second transmission end of the conversion module 320 constant; in the above-mentioned second sub-mode, the first charge pump unit 3222 and the first inductor 3224 jointly maintain the voltage ratio between the first transmission end and the second transmission end of the conversion module 320 constant.

[0107] As an implementation manner, when the battery module 310 discharges, the conversion module 320 steps down the first supply voltage provided by the battery module 310 to obtain a first output voltage, and outputs the first output voltage to the load through the second transmission end. The first charge pump unit 3222 and the first inductor 3224 can be used to maintain the constancy of the first output voltage, or to maintain the constancy of the voltage ratio between the first supply voltage and the first output voltage.

[0108] As another implementation manner, when the battery module 310 charges, the conversion module 320 steps up the third supply voltage provided by the charge and discharge management module 340 to obtain a second output voltage, and outputs the second output voltage to the battery module 310 through the first transmission end. The first charge pump unit 3222 and the first inductor 3224 can be used to maintain the constancy of the third supply voltage input to the second transmission end, or to maintain the constancy of the voltage ratio between the third supply voltage input to the second transmission end and the second output voltage.

[0109] The second voltage conversion branch 324 may include a second charge pump unit 3242 and a second inductor 3244. The second charge pump unit 3242 may be respectively connected to the first transmission end and the second transmission end of the conversion module 320. The second inductor 3244 may also be connected to the second transmission end of the conversion module 320 and connected to the first transmission end of the conversion module 320 through the second charge pump unit 3242. The second charge pump unit 3242 and the second inductor 3244 may be used to maintain the voltage at the second transmission end constant or maintain the voltage ratio between the first transmission end and the second transmission end constant.

[0110] In the above first operating mode, only the second charge pump unit 3242 may operate, and the second inductor 3244 does not operate.

[0111] In the above second operating mode, the second charge pump unit 3242 and the second inductor 3244 operate together. Further, in the above first sub-mode, the second charge pump unit 3242 and the second inductor 3244 jointly maintain the voltage at the second transmission end of the conversion module 320 constant; in the above second sub-mode, the second charge pump unit 3242 and the second inductor 3244 jointly maintain the voltage ratio between the first transmission end and the second transmission end of the conversion module 320 constant.

[0112] As an implementation, when the battery module 310 discharges, the second charge pump unit 3242 and the second inductor 3244 may be used to maintain the third power supply voltage input to the second transmission end constant or maintain the voltage ratio between the third power supply voltage input to the second transmission end and the second output voltage constant.

[0113] As another implementation, when the battery module 310 charges, the second charge pump unit 3242 and the second inductor 3244 may be used to maintain the third power supply voltage input to the second transmission end constant or maintain the voltage ratio between the third power supply voltage input to the second transmission end and the second output voltage constant.

[0114] The operating mode of the second voltage conversion branch 324 may be similar to that of the first voltage conversion branch 322. For the description of the second voltage conversion branch 324, reference may be made to the above description of the first voltage conversion branch 322, which will not be repeated here.

[0115] The first voltage conversion branch 322 and the second voltage conversion branch 324 may operate independently and operate out of phase with each other.

[0116] The first voltage conversion branch 322 and the second voltage conversion branch 324 operate independently, which may mean that the first voltage conversion branch 322 and the second voltage conversion branch 324 can be controlled to operate through two control signals respectively, and the control signals corresponding to the first voltage conversion branch 322 and the second voltage conversion branch 324 will not affect each other.

[0117] Optionally, the first voltage conversion branch 322 and the second voltage conversion branch 324 may operate at an interval of a target phase. For example, the first voltage conversion branch 322 and the second voltage conversion branch 324 may operate at an interval of 180° in phase, or the first voltage conversion branch 322 and the second voltage conversion branch 324 may operate at an interval of 90° in phase, etc., which is not limited herein.

[0118] By setting inductors in each voltage conversion branch, the load-carrying capacity of each voltage conversion branch can be improved. Moreover, compared with the related art where two voltage conversion branches share one inductor, the first voltage conversion branch 322 and the second voltage conversion branch 324 can operate independently, and they do not need to work synchronously, but can achieve out-of-phase operation, thereby reducing the voltage ripple output by the conversion module 320.

[0119] In the embodiments of the present application, through the first voltage conversion branch 322 and the second voltage conversion branch 324, the conversion module 320 is enabled to support the functions of keeping the voltage at the second transmission end of the conversion module 320 constant and the voltage ratio between the first transmission end and the second transmission end of the conversion module 320 constant, which can improve the voltage conversion ability of the conversion module 320; moreover, the first voltage conversion branch 322 and the second voltage conversion branch 324 each include an inductor, which improves the load-carrying capacity of the conversion module, and the first voltage conversion branch 322 and the second voltage conversion branch 324 operate independently, and the first voltage conversion branch 322 and the second voltage conversion branch 324 operate out of phase, which can reduce the ripple of the voltage output by the conversion module and improve the stability and performance of the voltage regulation circuit.

[0120] In some embodiments, the first charge pump unit 3222 in the first voltage conversion branch 322 is a circuit composed of switches and capacitors. The first charge pump unit 3222 may include a first switch group, and the first switch group may be connected to the first inductor. The second charge pump unit 3242 in the second voltage conversion branch 324 is a circuit composed of switches and capacitors. The second charge pump unit 3242 may include a second switch group, and the second switch group may be connected to the second inductor.

[0121] In the above-mentioned second operating mode, by adjusting the duty cycle of at least some of the switches in the first switch group, the conduction duration of the path between the first inductor 3224 and the first transmission end and / or the second transmission end of the conversion module 320 can be adjusted, that is, the charging duration and the discharging duration of the first inductor 3224 in one cycle are adjusted, so as to adjust the voltage ratio between the first transmission end and the second transmission end.

[0122] By adjusting the duty cycle of at least some of the switches in the second switch group, the conduction duration of the path between the second inductor 3244 and the first transmission end and / or the second transmission end of the conversion module 320 can be adjusted, that is, the charging duration and the discharging duration of the second inductor 3244 in one cycle are adjusted, so as to adjust the voltage ratio between the first transmission end and the second transmission end.

[0123] As an implementation manner, in the above-mentioned first sub-mode, by means of closed-loop feedback, the duty cycle of at least some of the switches in the first switch group and the duty cycle of at least some of the switches in the second switch group can be adjusted to maintain the voltage of the second transmission end constant. As Figure 7 shown, the above-mentioned voltage regulation circuit 300 may further include a first voltage sampling unit 350 and a control module 360. The first voltage sampling unit 350 may be connected to the second transmission end of the conversion module 320, and the control module 360 may be respectively connected to the first switch group of the first voltage conversion branch 322, the second switch group of the second voltage conversion branch 324, and the first voltage sampling unit 350.

[0124] The first voltage sampling unit 350 is configured to collect the voltage of the second transmission end of the conversion module 320 to obtain a first sampling voltage.

[0125] The control module 360 is configured to adjust the duty cycle of at least some of the switches in the first switch group according to the first sampling voltage so that the first sampling voltage is maintained at a target voltage; and adjust the duty cycle of at least some of the switches in the second switch group according to the first sampling voltage so that the first sampling voltage is maintained at a target voltage.

[0126] The first voltage sampling unit 350 can sample the voltage of the second transmission end of the conversion module 320 to obtain a first sampling voltage, and then send the first sampling voltage to the control module 360.

[0127] The control module 360 can independently control the operations of the first voltage conversion branch 322 and the second voltage conversion branch 324. The control module 360 can generate two drive signals to respectively drive the first voltage conversion branch 322 and the second voltage conversion branch 324 to operate.

[0128] After receiving the first sampled voltage sent by the first voltage sampling unit 350, the control module 360 can adjust the first duty ratio corresponding to the first charge pump unit 3222 according to the first sampled voltage, and generate a first driving signal according to the adjusted first duty ratio, and control the first voltage conversion branch 322 to operate based on the first driving signal, so as to maintain the voltage at the second transmission end of the conversion module 320 constant.

[0129] Exemplarily, after receiving the first sampled voltage, the control module 360 can compare the first sampled voltage with the required target voltage, calculate the first difference between the first sampled voltage and the required target voltage, and adjust the duty ratio of at least some switches in the first switch group of the first charge pump unit 3222 according to the first difference, that is, adjust the first duty ratio corresponding to the first charge pump unit 3222. The control module 360 can generate a first driving signal according to the adjusted first duty ratio, and send the first driving signal to the first switch group. The first switch group operates based on the first driving signal, so as to adjust the voltage at the first transmission end and / or the second transmission end of the conversion module 320, make up for the gap between the first sampled voltage and the required target voltage, and make the first sampled voltage approach the required target voltage, so as to maintain the voltage at the second transmission end of the conversion module 320 at the target voltage.

[0130] After receiving the first sampled voltage sent by the first voltage sampling unit 350, the control module 360 can adjust the second duty ratio corresponding to the second charge pump unit 3242 according to the first sampled voltage, and generate a second driving signal according to the adjusted second duty ratio, and control the second voltage conversion branch 324 to operate based on the second driving signal, so as to maintain the voltage at the second transmission end of the conversion module 320 constant.

[0131] Exemplarily, after receiving the first sampled voltage, the control module 360 can compare the first sampled voltage with the required target voltage, calculate the first difference between the first sampled voltage and the required target voltage, and adjust the duty ratio of at least some switches in the second switch group of the second charge pump unit 3242 according to the first difference, that is, adjust the second duty ratio corresponding to the second charge pump unit 3242. The control module 360 can generate a second driving signal according to the adjusted second duty ratio, and send the second driving signal to the second switch group. The second switch group operates based on the second driving signal, so as to maintain the voltage at the second transmission end of the conversion module 320 at the target voltage.

[0132] It should be noted that, since the first voltage conversion branch 322 and the second voltage conversion branch 324 operate with a phase shift, the control module 360 can, before the first voltage conversion branch 322 enters a new cycle, determine the first duty cycle corresponding to the first charge pump unit 3222 in this new cycle according to the first sampling voltage collected in real time by the first voltage sampling unit 350, and generate a first driving signal; the control module 360 can, before the second voltage conversion branch 324 enters a new cycle, determine the second duty cycle corresponding to the second charge pump unit 3242 in this new cycle according to the first sampling voltage collected in real time by the first voltage sampling unit 350, and generate a second driving signal. By independently controlling the first voltage conversion branch 322 and the second voltage conversion branch 324 and generating two driving signals, the accuracy of control and the output stability can be further ensured.

[0133] Optionally, the above-mentioned first driving signal and second driving signal may include, but are not limited to, PWM (Pulsewidth Modulation) signals and the like.

[0134] In the embodiment of the present application, the duty cycles of at least some of the switches in the first switch group and the duty cycles of at least some of the switches in the second switch group can be adjusted in a closed-loop feedback manner to maintain the voltage at the second transmission end of the conversion module 320 constant, meeting the requirement of maintaining the voltage at the second transmission end of the conversion module 320 constant, and improving the accuracy of controlling the conversion module 320.

[0135] As an implementation manner, in the above-mentioned second sub-mode, the voltage ratio between the first transmission end and the second transmission end of the conversion module 320 can be maintained constant by means of a fixed duty cycle. When the voltage ratio between the first transmission end and the second transmission end of the conversion module 320 is constant, the duty cycles of the switches in the first switch group in the first charge pump unit 3222 remain unchanged, and the duty cycles of the switches in the second switch group in the second charge pump unit 3242 remain unchanged.

[0136] The duty cycles of the switches in the first switch group in the first charge pump unit 3222 remain unchanged, that is, the first duty cycle corresponding to the first charge pump unit 3222 remains unchanged. When the first duty cycle remains unchanged, the operating state of the first charge pump unit 3222 is the same in each cycle, the charging duration of the first inductor 3224 is the same in each cycle, and the discharging duration of the first inductor 3224 is the same in each cycle. Therefore, the voltage ratio between the first transmission end and the second transmission end of the conversion module 320 can be maintained constant.

[0137] Similarly, the duty cycle of each switch in the second switch group in the second charge pump unit 3242 remains unchanged, that is, the second duty cycle corresponding to the second charge pump unit 3242 remains unchanged. When the second duty cycle remains unchanged, the operating state of the second charge pump unit 3242 is the same in each period, the charging duration of the second inductor 3244 is the same in each period, and the discharging duration of the first inductor 3224 is the same in each period. Therefore, the voltage ratio between the first transmission end and the second transmission end of the conversion module 320 can be maintained constant.

[0138] Furthermore, the control module 360 can generate a first driving signal according to the target duty cycle and control the first voltage conversion branch 322 to operate based on the first driving signal, so that the voltage ratio between the first transmission end and the second transmission end of the conversion module 320 is the target ratio. The control module 360 can also generate a second driving signal according to the target duty cycle and control the second voltage conversion branch 324 to operate based on the second driving signal, so that the voltage ratio between the first transmission end and the second transmission end of the conversion module 320 is the target ratio.

[0139] Among them, the target duty cycle can be calculated according to the target ratio. The duty cycles corresponding to the first charge pump unit 3222 and the second charge pump unit 3242 respectively, and the voltage ratio between the first transmission end and the second transmission end of the conversion module 320 can have corresponding relationships. Based on this relationship, the target duty cycle can be calculated according to the required target ratio, and the first duty cycle corresponding to the first charge pump unit 3222 and the second duty cycle corresponding to the second charge pump unit 3242 can both be adjusted to this target duty cycle, so as to generate the first driving signal and the second driving signal respectively, and control the first voltage conversion branch 322 and the second voltage conversion branch 324 to operate, so that the voltage ratio between the first transmission end and the second transmission end of the conversion module 320 is the target ratio.

[0140] In the embodiment of the present application, the voltage ratio between the first transmission end and the second transmission end of the conversion module 320 can be maintained constant by fixing the duty cycle, and the control method is simpler, reducing the complexity of the circuit.

[0141] As another implementation manner, in the above-mentioned second sub-mode, the duty cycles of at least some switches in the first switch group and the duty cycles of at least some switches in the second switch group can be adjusted in a closed-loop feedback manner to maintain the voltage ratio between the first transmission end and the second transmission end of the conversion module 320 constant. As Figure 8 shown, the above-mentioned voltage regulation circuit 300 may further include a second voltage sampling unit 370. The second voltage sampling unit 370 can be connected to the first transmission end of the conversion module 320, and the control module 360 can also be connected to the second voltage sampling unit 370.

[0142] The second voltage sampling unit 370 is configured to collect the voltage at the first transmission end of the conversion module 320 to obtain a second sampled voltage.

[0143] The control module 360 is further configured to adjust the duty cycle of at least some switches in the first switch group according to the first sampled voltage and the second sampled voltage, so that the voltage ratio between the second sampled voltage and the first sampled voltage is maintained at a target ratio; and adjust the duty cycle of at least some switches in the second switch group according to the first sampled voltage and the second sampled voltage, so that the voltage ratio between the second sampled voltage and the first sampled voltage is maintained at a target ratio.

[0144] The second voltage sampling unit 370 can sample the voltage at the first transmission end of the conversion module 320 to obtain a second sampled voltage, and then send the second sampled voltage to the control module 360. It should be noted that the specific circuit structures of the first voltage sampling unit 350 and the second voltage sampling unit 370 are not limited in the embodiments of the present application. The above first sampled voltage and second sampled voltage can be the actual voltage values of the second transmission end and the first transmission end, or electrical signals respectively used to represent the voltage of the second transmission end and the voltage of the first transmission end, which are not limited herein.

[0145] After receiving the first sampled voltage sent by the first voltage sampling unit 350 and the second sampled voltage sent by the second voltage sampling unit 370, the control module 360 can adjust the first duty cycle corresponding to the first charge pump unit 3222 according to the first sampled voltage and the second sampled voltage, and generate a first drive signal based on the adjusted first duty cycle, and control the first voltage conversion branch 322 to work based on the first drive signal to keep the voltage ratio between the first transmission end and the second transmission end of the conversion module 320 constant.

[0146] Exemplarily, after receiving the first sampled voltage sent by the first voltage sampling unit 350 and the second sampled voltage sent by the second voltage sampling unit 370, the control module 360 can calculate the real-time ratio between the second sampled voltage and the first sampled voltage, compare the real-time ratio with the required target ratio, calculate the second difference between the real-time ratio and the required target ratio, and adjust the duty cycle of at least some switches in the first switch group of the first charge pump unit 3222 according to the second difference, that is, adjust the first duty cycle corresponding to the first charge pump unit 3222. The control module 360 can generate a first driving signal according to the adjusted first duty cycle, and send the first driving signal to the first switch group. The first switch group operates based on the first driving signal, so as to adjust the voltage of the first transmission end and / or the second transmission end of the conversion module 320, make up for the gap between the real-time ratio and the target ratio between the second sampled voltage and the first sampled voltage, and make the real-time ratio between the second sampled voltage and the first sampled voltage approach the required target voltage, so as to maintain the voltage ratio between the first transmission end and the second transmission end of the conversion module 320 at the target ratio.

[0147] After receiving the first sampled voltage sent by the first voltage sampling unit 350 and the second sampled voltage sent by the second voltage sampling unit 370, the control module 360 can adjust the second duty cycle corresponding to the second charge pump unit 3242 according to the first sampled voltage and the second sampled voltage, generate a second driving signal according to the adjusted second duty cycle, and control the operation of the second voltage conversion branch 324 based on the second driving signal, so as to maintain the voltage ratio between the first transmission end and the second transmission end of the conversion module 320 constant.

[0148] Exemplarily, after receiving the first sampled voltage sent by the first voltage sampling unit 350 and the second sampled voltage sent by the second voltage sampling unit 370, the control module 360 can calculate the real-time ratio between the second sampled voltage and the first sampled voltage, compare the real-time ratio with the required target ratio, calculate the second difference between the real-time ratio and the required target ratio, and adjust the duty cycle of at least some switches in the second switch group of the second charge pump unit 3242 according to the second difference, that is, adjust the second duty cycle corresponding to the second charge pump unit 3242. The control module 360 can generate a second driving signal according to the adjusted second duty cycle, and send the second driving signal to the second switch group. The second switch group operates based on the second driving signal, so as to maintain the voltage ratio between the first transmission end and the second transmission end of the conversion module 320 at the target ratio.

[0149] In the embodiments of the present application, the duty cycles of at least some switches in the first switch group and the duty cycles of at least some switches in the second switch group can be adjusted by means of closed-loop feedback to maintain a constant voltage ratio between the first transmission end and the second transmission end of the conversion module 320, meet the requirement of adjustable and constant conversion ratio of the conversion module 320, and improve the accuracy of controlling the conversion module 320.

[0150] It should be noted that in the above second sub-mode, the target duty cycle or the target ratio can be set according to the actual operation requirements. For example, it can be set according to the supply voltage actually required by the load (for example, in some operation scenarios, different applications are running on the electronic device, and the supply voltage actually required by the load is different) or the charging voltage actually required by the battery, etc., to meet the requirements in different operation scenarios and improve the flexibility and adaptability of the conversion module 320.

[0151] In some embodiments, in the above first working mode, the first inductor 3224 of the first voltage conversion branch 322 and the second inductor 3244 of the second voltage conversion branch 324 do not work, and in the above second working mode, the first inductor 3224 and the second inductor 3244 work. To achieve the switching between the first working mode and the second working mode of the conversion module 320, as Figure 9 shown, the first voltage conversion branch 322 may further include a first switch unit 3226, and the second voltage conversion branch 324 further includes a second switch unit 3246.

[0152] Among them, the first switch unit 3226 can be connected in parallel with the first inductor 3224, and the first switch unit 3226 is connected to the first charge pump unit 3222. The second switch unit 3246 can be connected in parallel with the second inductor 3244, and the second switch unit 3246 is connected to the second charge pump unit 3242.

[0153] In the above first working mode, both the first switch unit 3226 and the second switch unit 3246 can be in the conducting state. When the first switch unit 3226 is conducting, the first inductor 3224 is short-circuited and the first inductor 3224 does not work; when the second switch unit 3246 is conducting, the second inductor 3244 is short-circuited and the second inductor 3244 does not work.

[0154] In the above-mentioned second operating mode, both the first switching unit 3226 and the second switching unit 3246 can be in the off state. When the first switching unit 3226 is off, the path between the first inductor 3224 and the first transmission terminal (i.e., the V1 terminal) and / or the second transmission terminal (i.e., the V2 terminal) is conducted, and the first inductor 3224 operates; when the second switching unit 3246 is off, the path between the second inductor 3244 and the first transmission terminal and / or the second transmission terminal is conducted, and the second inductor 3244 operates.

[0155] Optionally, the first switching unit 3226 and the second switching unit 3246 may include bidirectional switches. The first switching unit 3226 may include a third switch and a fourth switch, and the third switch and the fourth switch may form a bidirectional switch; the second switching unit 3246 may include a fifth switch and a sixth switch, and the fifth switch and the sixth switch may form a bidirectional switch.

[0156] The bidirectional switch can achieve power transmission in two opposite directions. Exemplarily, the third switch and the fourth switch may be connected in series. The third switch may be connected to the first transmission terminal through the first charge pump unit 3222, and the fourth switch may be connected to the second transmission terminal. Then, the bidirectional switch formed by the third switch and the fourth switch can achieve power transmission from the first transmission terminal to the second transmission terminal, and can also achieve power transmission from the second transmission terminal to the first transmission terminal. Exemplarily, the fifth switch and the sixth switch may be connected in series. The fifth switch may be connected to the first transmission terminal through the first charge pump unit 3222, and the sixth switch may be connected to the second transmission terminal. Then, the bidirectional switch formed by the fifth switch and the sixth switch can achieve power transmission from the first transmission terminal to the second transmission terminal, and can also achieve power transmission from the second transmission terminal to the first transmission terminal.

[0157] In some embodiments, the above-mentioned fourth switch and the sixth switch may be the same switch, or the above-mentioned fourth switch and the sixth switch may be different switches.

[0158] In some embodiments, the control module 360 may obtain the voltage of the first transmission terminal of the conversion module 320 and control the conversion module 320 to switch operating modes according to the voltage of the first transmission terminal. Further, the control module 360 may obtain the second sampling voltage corresponding to the first transmission terminal collected by the second voltage sampling unit 370 and determine whether the second sampling voltage is greater than or equal to the first voltage threshold. If the control module 360 determines that the second sampling voltage is greater than or equal to the first voltage threshold, it controls the conversion module 320 to operate in the first operating mode, and the control module 360 may control the first switching unit 3226 and the second switching unit 3246 to conduct, so that the conversion module 320 operates in the first operating mode.

[0159] If the control module 360 determines that the second sampled voltage is less than the first voltage threshold, it can control the conversion module 320 to operate in the second operating mode. The control module 360 can control the first switch unit 3226 and the second switch unit 3246 to turn off, so that the conversion module 320 operates in the second operating mode.

[0160] Furthermore, the control module 360 can also determine whether the second sampled voltage is greater than or equal to the second voltage threshold. If the control module 360 determines that the second sampled voltage is less than the first voltage threshold and greater than or equal to the second voltage threshold, it can control the conversion module 320 to operate in the first sub-mode or the second sub-mode. If the control module 360 determines that the second sampled voltage is less than the second voltage threshold, it can control the conversion module 320 to operate in the first sub-mode.

[0161] The specific control method by which the control module 360 controls the conversion module 320 to operate in the first sub-mode or the second sub-mode can refer to the description in the above embodiments and will not be repeated here.

[0162] Exemplarily, Figure 10 is a circuit schematic diagram of a conversion module for an embodiment. As Figure 10 shown, the first voltage conversion branch 322 can include a first charge pump unit 3222, a first inductor L1, and a first switch unit 3226. Among them, the first charge pump unit 3222 can include a first switch group and a first capacitor C1. The first switch group can include a switch Q1, a switch Q2, a switch Q3, and a switch Q4. The switch Q1 and the switch Q2 are connected in series. The switch Q3 and the switch Q4 are connected in series. The switch Q1 can be connected to the first transmission end (i.e., the V1 end), the switch Q3 can be connected to the second transmission end (i.e., the V2 end), and the switch Q4 can be grounded. The first capacitor C1 can be respectively connected to the switch Q1, the switch Q2, the switch Q3, and the switch Q4. Further, the first capacitor C1 can be connected to the connection midpoint between the switch Q1 and the switch Q2, and the first capacitor C1 can be connected to the connection midpoint between the switch Q3 and the switch Q4. The first inductor L1 can be respectively connected to the switch Q2, the switch Q3, and the second transmission end.

[0163] The first switch unit 3226 can include a switch Q9 (i.e., the above-mentioned third switch) and a switch Q10 (i.e., the above-mentioned fourth switch). The switch Q9 and the switch Q10 can form a bidirectional switch for realizing bidirectional energy transfer. The switch Q9 can be connected to the switch Q2, the switch Q10 can be connected to the switch Q3 and the second transmission end, and the bidirectional switch formed by the switch Q9 and the switch Q10 is connected in parallel with the first inductor L1.

[0164] The second voltage conversion branch 324 may include a second charge pump unit 3242, a second inductor L2, and a second switch unit 3246. Among them, the second charge pump unit 3242 may include a second switch group and a second capacitor C2. The second switch group may include a switch Q5, a switch Q6, a switch Q7, and a switch Q8. The switch Q5 and the switch Q6 are connected in series. The switch Q7 and the switch Q8 are connected in series. The switch Q5 may be connected to the first transmission end (i.e., the V1 end). The switch Q7 may be connected to the second transmission end (i.e., the V2 end). The switch Q8 may be grounded. The second capacitor C2 may be respectively connected to the switch Q5, the switch Q6, the switch Q7, and the switch Q8. Further, the second capacitor C2 may be connected to the connection midpoint between the switch Q5 and the switch Q6, and the second capacitor C2 may be connected to the connection midpoint between the switch Q7 and the switch Q8. The second inductor L2 may be respectively connected to the switch Q6, the switch Q7, and the second transmission end.

[0165] The second switch unit 3246 may include a switch Q11 (i.e., the above-mentioned fifth switch) and a switch Q12 (i.e., the above-mentioned sixth switch). The switch Q11 and the switch Q12 may form a bidirectional switch for realizing bidirectional energy transfer. The switch Q11 may be connected to the switch Q6. The switch Q12 may be connected to the switch Q7 and the second transmission end. The bidirectional switch formed by the switch Q11 and the switch Q12 is connected in parallel with the second inductor L2.

[0166] It should be noted that the connection midpoint between two switches can be any node on the connection circuit between the two switches, which can be used to connect to other circuits or electronic devices, and is not necessarily the center point of the connection circuit.

[0167] The switches Q1, Q2, Q3, and Q4 may serve as the first half-bridge switches of the conversion module 320. The switches Q5, Q6, Q7, and Q8 may serve as the second half-bridge switches of the conversion module 320. The first half-bridge switches and the second half-bridge switches are connected in parallel through the first transmission end and the second transmission end.

[0168] When the conversion module 320 is in the first working mode, the switches Q9 and Q10 are turned on, and the first inductor L1 is short-circuited. By controlling the conduction or disconnection of the switches Q1, Q2, Q3, and Q4, the first capacitor C1 is alternately charged and discharged, so as to realize the conversion processing of the input voltage according to a fixed conversion ratio.

[0169] When the conversion module 320 is in the first working mode, the equivalent circuit of the conversion module 320 may be as Figure 11AAs shown in the figure. For example, when the battery module 310 discharges, by controlling the conduction or disconnection of the switch Q1, switch Q2, switch Q3, and switch Q4, the first capacitor C1 is alternately charged and discharged, so as to achieve a step-down process of 2:1 for the first power supply voltage input at the first transmission end; when the battery module 310 is charged, by controlling the conduction or disconnection of the switch Q1, switch Q2, switch Q3, and switch Q4, the first capacitor C1 is alternately charged and discharged, so as to achieve a step-up process of 1:2 for the third power supply voltage input at the second transmission end.

[0170] When the conversion module 320 is in the second working mode, the switches Q9 and Q10 are disconnected, and the controllable switch Q2 can be controlled to be in a continuously conducting state. By controlling the conduction or disconnection of the switches Q1, Q3, and Q4, the first capacitor C1 and the first inductor L1 are alternately charged and discharged. By adjusting the conduction duration of the switch Q1, Q3, or Q4, the charging duration and the discharging duration of the first capacitor C1 and the first inductor L1 can be adjusted, so as to achieve the adjustment of the conversion ratio of the conversion module 320. In the above embodiment, the first driving signal output by the control module 360 can be used to drive the switches Q1, Q3, or Q4 to conduct.

[0171] When the conversion module 320 is in the first working mode, the equivalent circuit of the conversion module 320 can be as Figure 11B shown. For example, when the battery module 310 discharges, the switch Q2 is always conducting. If the switches Q1 and Q3 are conducting and the switch Q4 is disconnected, the first capacitor C1 and the first inductor L1 are equivalent to being connected in parallel, and the first capacitor C1 and the first inductor L1 are charged according to the first power supply voltage input at the first transmission end; if the switches Q1 and Q3 are disconnected and the switch Q4 is conducting, the first capacitor C1 and the first inductor L1 are equivalent to being connected in series, and the first capacitor C1 and the first inductor L1 discharge to the second transmission end.

[0172] The first duty cycle corresponding to the first charge pump unit 3222 may refer to the duty cycles corresponding to switches Q1 and Q3, corresponding to the charging duration of the first capacitor C1 and the first inductor L1 when in the first sub-mode. When the battery module 310 discharges, the first supply voltage input at the first transmission end decreases. To maintain a constant voltage at the second transmission end, the first duty cycle can be increased. If in the second sub-mode, a fixed duty cycle can be set to make the charging duration and discharging duration of the first capacitor C1 and the first inductor L1 fixed, maintaining a constant voltage ratio between the first transmission end and the second transmission end, or the first duty cycle can be adjusted according to the real-time ratio between the first transmission end and the second transmission end to maintain a constant voltage ratio between the first transmission end and the second transmission end. Optionally, the first duty cycle corresponding to the first charge pump unit 3222 may also refer to the duty cycle corresponding to switch Q4, corresponding to the discharging duration of the first capacitor C1 and the first inductor L1. When the first supply voltage decreases, to maintain a constant voltage at the second transmission end, the first duty cycle can be decreased.

[0173] Similarly, when the battery module 310 is charging, switch Q2 is always on. The charging duration and discharging duration of the first capacitor C1 and the first inductor L1 can be adjusted by adjusting the duty cycles corresponding to switches Q1, Q3, and / or switch Q4, so as to maintain a constant voltage at the second transmission end or maintain a constant voltage ratio between the first transmission end and the second transmission end. For example, when the battery module 310 is charging, if switches Q1 and Q3 are off and switch Q4 is on, the first capacitor C1 and the first inductor L1 are charged according to the third supply voltage input at the second transmission end. If switches Q1 and Q3 are on and switch Q4 is off, the first capacitor C1 and the first inductor L1 and the third supply voltage together supply power to the first transmission end. The first duty cycle corresponding to the first charge pump unit 3222 may refer to the duty cycles corresponding to switches Q1 and Q3. As the total battery voltage of the battery module 310 rises, that is, the voltage at the first transmission end rises, to maintain a constant voltage at the second transmission end, the first duty cycle can be decreased.

[0174] The above-mentioned first duty cycle can be a value between 0 and 1. Exemplarily, in order to ensure that the conversion module 320 maintains a constant voltage at the second transmission end or maintains a constant voltage ratio between the first transmission end and the second transmission end in the second working mode, the voltages at the first transmission end and the second transmission end of the conversion module 320 need to satisfy a certain relationship. For example, it needs to satisfy 2*V2≥V1, where V2 represents the voltage at the second transmission end and V1 represents the voltage at the first transmission end; or, it needs to satisfy 2*V1≥2*V2≥V1, etc. Thus, after step-down processing of the first supply voltage output by the battery module 310, a first output voltage that meets the load power supply requirements can be obtained, and after step-up processing of the third supply voltage output by the charge and discharge management module 340, a second output voltage that meets the charging requirements of the battery module 310 can be obtained, and it can be ensured that the voltage transmitted by the charge and discharge management module 340 to the load meets the power supply requirements of the load.

[0175] When the conversion module 320 is in the first working mode, the switch Q11 and the switch Q12 are turned on, the second inductor L2 is short-circuited, and by controlling the conduction or disconnection of the switch Q5, the switch Q6, the switch Q7, and the switch Q8, the second capacitor C2 is alternately charged and discharged, realizing the conversion processing of the input voltage.

[0176] When the conversion module 320 is in the second working mode, the switch Q11 and the switch Q12 are turned off, the switch Q6 can be controlled to be in a continuously conducting state, and by controlling the conduction or disconnection of the switch Q5, the switch Q7, and the switch Q8, the second capacitor C2 and the second inductor L2 are alternately charged and discharged. By adjusting the conduction duration of the switch Q5, the switch Q7, or the switch Q8, the charging duration and the discharging duration of the second capacitor C2 and the second inductor L2 can be adjusted, realizing the adjustment of the conversion ratio of the conversion module 320. In the above embodiment, the second driving signal output by the control module 360 can be used to drive the switch Q5, the switch Q7, or the switch Q8 to conduct.

[0177] It should be noted that the working principle of the second voltage conversion branch 324 can be similar to that of the first voltage conversion branch 322, and will not be repeated here.

[0178] In the embodiment of the present application, the first voltage conversion branch 322 and the second voltage conversion branch 324 can operate in a phase-shifted manner. Taking the case where the first voltage conversion branch 322 and the second voltage conversion branch 324 are spaced 180° apart as an example, the phase difference between the first driving signal corresponding to the first voltage conversion branch 322 and the second driving signal corresponding to the second voltage conversion branch 324 is 180°.

[0179] Exemplarily, Figure 11C is a schematic diagram of voltage change in an embodiment. As Figure 11CAs shown, taking the case where the transformation module 320 steps down the first power supply voltage input at the first transmission end and the input first power supply voltage remains unchanged as an example, curve 1110 represents the variation of the voltage output by the first voltage transformation branch 322, curve 1120 represents the variation of the voltage output by the second voltage transformation branch 324, and curve 1130 represents the voltage at the second transmission end. Since the first voltage transformation branch 322 and the second voltage transformation branch 324 operate with a phase shift, the voltage ripple output by the transformation module 320 can be reduced. It should be noted that Figure 11C This is only used to illustrate the phase shift operation of the first voltage transformation branch 322 and the second voltage transformation branch 324, and does not limit the voltages output by the first voltage transformation branch 322 and the second voltage transformation branch 324. The actual voltage output conditions of the first voltage transformation branch 322 and the second voltage transformation branch 324 can be determined according to the working mode, duty cycle, voltage at the first transmission end, and / or voltage at the second transmission end, etc.

[0180] Optionally, the control module 360 can be respectively connected to 12 switches such as switch Q1 to switch Q12, and according to the working mode of the transformation module 320, or according to the required target voltage or target ratio, etc., output corresponding drive signals to switch Q1 to switch Q12 respectively to control the conduction or disconnection of switch Q1 to switch Q12 respectively. This control method is more accurate.

[0181] Optionally, for some switches, a common drive signal can also be used. For example, switch Q9 and switch Q10 can share the same drive signal, and the control module 360 controls switch Q9 and switch Q10 to conduct simultaneously or control switch Q9 and switch Q10 to disconnect simultaneously through one drive signal; at the same time, switch Q11 and switch Q12 can also share the same drive signal.

[0182] It should be noted that the above switches Q1 to Q12 can include but are not limited to any one of MOS transistors (Metal - Oxide - Semiconductor Field - Effect Transistor), GaN (gallium nitride) switches, SiC (silicon carbide) switches, etc.

[0183] Optionally, the above transformation module 320 can also implement a 1:1 voltage ratio. In the first operating mode, switches Q1, Q2, Q9, and Q10 can be continuously turned on, and switches Q5, Q6, Q11, and Q12 can be continuously turned on. At this time, the transformation module 320 is equivalent to a direct-through circuit, implementing a 1:1 voltage ratio. In the second operating mode, a 1:1 voltage ratio can also be achieved by adjusting the first duty cycle of the first charge pump unit 3222 and the second duty cycle of the second charge pump unit 3242. For example, the duty cycles of switches Q1 and Q3 can be set to 1, and the duty cycles of switches Q5 and Q7 can be set to 1 to achieve a 1:1 voltage ratio.

[0184] Exemplarily, Figure 12 FIG. is a circuit schematic diagram of the transformation module for another embodiment. The first switch unit 3226 and the second switch unit 3246 can share a switch. For example, the first switch unit 3226 and the second switch unit 3246 share switch Q10, thereby reducing the number of switches, which can reduce the circuit cost and circuit complexity.

[0185] It should be noted that, Figure 10 and Figure 12 the bidirectional switch shown in is the source connection of two MOS transistors. The bidirectional switch can also be the drain connection of two MOS transistors. For example, as Figure 13 shown, the drain of switch Q9 is connected to the drain of switch Q10.

[0186] It should be noted that the first switch unit 3226 and the second switch unit 3246 can also be other switch elements. For example, they can be bidirectional switches composed of other switch devices, or single switches, and are not limited to the bidirectional switch composed of two MOS transistors described above.

[0187] In the embodiments of the present application, the operating mode of the transformation module 320 can be flexibly switched through the first switch unit 3226 and the second switch unit 3246. The transformation module 320 can be flexibly switched under different operating modes to adapt to the requirements of different operating scenarios. The transformation module 320 not only supports the first operating mode with a fixed transformation ratio, but also supports the second operating mode with an adjustable transformation ratio, improving the voltage transformation ability of the transformation module 320, thereby being able to meet the charge and discharge voltage ranges of more types of batteries and reducing the application limitations on other types of batteries.

[0188] In some embodiments, since the first voltage conversion branch 322 and the second voltage conversion branch 324 are independent dual-phase operations, the voltage output by the conversion module 320 is the parallel output of the first voltage conversion branch 322 and the second voltage conversion branch 324. Since the parasitic resistance of the first inductor L1 in the first voltage conversion branch 322 and the second inductor L2 in the second voltage conversion branch 324 may be different, resulting in different output currents of the two, different power consumption of the two will occur, and different hot spots may result, and the current transmitted by the device will have the risk of overcurrent. Therefore, it is necessary to control the current size of each phase, that is, it is necessary to control the current size of the first voltage conversion branch 322 and the second voltage conversion branch 324, so that the output current of the first voltage conversion branch 322 and the output current of the second voltage conversion branch 324 are as close as possible to achieve current sharing between the two.

[0189] In the related art, a current sampling resistor is usually connected in series in each branch that needs current sharing, such as Figure 14 As shown, a current sampling resistor Rcs1 is connected in series in the first voltage conversion branch 322, and a current sampling resistor Rcs2 is connected in series in the second voltage conversion branch 324. The current sampling resistors connected in series are used to sample the current of each branch, and the duty cycle of each branch is adjusted by the control module 360 to adjust the current, thereby ensuring the current balance of the two phases. However, this method requires the current sampling resistor to be connected in series in the circuit, which not only reduces the circuit efficiency and increases the circuit cost, but also increases the circuit area, which has a great impact on the circuit design of the motherboard in electronic products such as mobile phones, and has limitations.

[0190] In addition, there is another current sampling method, which eliminates the current sampling circuit in series in the branch, and uses the DCR (Direct Current Resistance) of the inductor in the branch, such as the first inductor L1 in the first voltage conversion branch 322 and the second inductor L2 in the second voltage conversion branch 324, to simulate the current sampling resistor to achieve current sampling. However, in this method, the inductor in the branch is external, and different projects or products have different choices of inductors, so the DCR of different inductors is also different, which will limit the choice of inductors and the application scope of current sampling.

[0191] In the embodiment of the present application, when the conversion module 320 is in the second working mode, some switches are in a continuously turned-on state, so the on-resistance of the continuously turned-on part of the switches can be used as the current sampling resistance in the branch.

[0192] The first switch group of the first charge pump unit 3222 includes a first switch, which is respectively connected to the first capacitor C1 and the first end of the first inductor L1. The second end of the first inductor L1 is connected to the second transmission end of the conversion module 320. When the first inductor L1 is working, the first switch is continuously in the on state. For Figure 10 example, the first switch is switch Q2. When the first inductor L1 is working, that is, in the second working mode, switch Q2 is continuously in the on state and remains normally open.

[0193] The second switch group of the second charge pump unit 3242 includes a second switch, which is respectively connected to the second capacitor C2 and the first end of the second inductor L2. The second end of the second inductor L2 is connected to the second transmission end of the conversion module 320. When the second inductor L2 is working, the second switch is continuously in the on state. For Figure 10 example, the second switch is switch Q6. When the second inductor L2 is working, that is, in the second working mode, switch Q6 is continuously in the on state and remains normally open.

[0194] Therefore, the on-resistance of the continuously on first switch in the first charge pump unit 3222 can be used as the current sampling resistor of the first voltage conversion branch 322 to sample the current of the first voltage conversion branch 322. The on-resistance of the continuously on second switch in the second charge pump unit 3242 is used as the current sampling resistor of the second voltage conversion branch 324 to sample the current of the second charge pump unit 3242.

[0195] The control module 360 is further configured to obtain a first sampling current corresponding to the first voltage conversion branch 322 according to the voltage difference and on-resistance corresponding to the first switch; obtain a second sampling current corresponding to the second voltage conversion branch 324 according to the voltage difference and on-resistance corresponding to the second switch; and is configured to adjust the duty cycle of at least some switches in the first switch group of the first voltage conversion branch 322 and / or adjust the duty cycle of at least some switches in the second switch group of the second voltage conversion branch 324 according to the first sampling current and the second sampling current, so that the first sampling current and the second sampling current tend to be the same.

[0196] As an implementation manner, as Figure 15 shown, both ends of the switch Q2 (i.e., the above-mentioned first switch) of the first voltage conversion branch 322 can be connected to the first amplifier U1, and both ends of the switch Q6 (i.e., the above-mentioned second switch) of the second voltage conversion branch 324 can be connected to the second amplifier U2. The first amplifier U1 and the second amplifier U2 can be respectively connected to the control module 360.

[0197] Exemplarily, when the transformation module 320 is in the second working mode, the switch Q2 and the switch Q6 are continuously turned on. The first amplifier U1 can collect the voltage across the switch Q2, obtain the voltage difference of the switch Q2, amplify the voltage difference of the switch Q2 to obtain an amplified voltage signal ISEN1, and then output it to the control module 360. The amplified voltage signal ISEN1 is used to represent the voltage difference of the switch Q2. The control module 360 can calculate the first sampling current corresponding to the first voltage transformation branch 322 according to the amplified voltage signal ISEN1 and the on-resistance corresponding to the switch Q2.

[0198] The second amplifier U2 can collect the voltage across the switch Q6, obtain the voltage difference of the switch Q6, amplify the voltage difference of the switch Q6 to obtain an amplified voltage signal ISEN2, and then output it to the control module 360. The amplified voltage signal ISEN2 is used to represent the voltage difference of the switch Q6. The control module 360 can calculate the second sampling current corresponding to the second voltage transformation branch 324 according to the amplified voltage signal ISEN2 and the on-resistance corresponding to the switch Q6.

[0199] The control module 360 can compare the magnitudes of the first sampling current and the second sampling current, and adjust the first duty cycle corresponding to the first charge pump unit 3222 according to the comparison result, and / or adjust the second duty cycle corresponding to the second charge pump unit 3242 according to the comparison result. For example, if the first sampling current is greater than the second sampling current, the first duty cycle corresponding to the first charge pump unit 3222 can be reduced to reduce the current transmitted by the first voltage transformation branch 322, or the second duty cycle corresponding to the second charge pump unit 3242 can be increased to increase the current transmitted by the second voltage transformation branch 324, etc., but not limited thereto.

[0200] It should be noted that the on-resistance of the switch Q2 and the on-resistance of the switch Q6 can be pre-stored in the control module 360. The method of calculating the sampling current according to the on-resistance of the switch and the voltage difference can make the calculated sampling current more accurate and improve the accuracy of the subsequent duty cycle adjustment.

[0201] Optionally, since switches Q2 and Q6 are usually switches of the same model, the on-resistance of switch Q2 is the same as or very close to that of switch Q6. Therefore, the control module 360 can also directly compare the amplified voltage signal ISEN1 with the amplified voltage signal ISEN2, and the obtained comparison result can represent the magnitude relationship between the current transmitted by the first voltage conversion branch 322 and the current transmitted by the second voltage conversion branch 324. Therefore, the control module 360 can adjust the first duty cycle corresponding to the first charge pump unit 3222 according to the comparison result corresponding to the amplified voltage signal ISEN1 and the amplified voltage signal ISEN2, and / or adjust the second duty cycle corresponding to the second charge pump unit 3242 according to the comparison result to achieve current sharing between the first voltage conversion branch 322 and the second voltage conversion branch 324. In this way, the calculation process is simpler and more convenient.

[0202] As an implementation manner, in the above first sub-mode, the control module 360 can adjust the first duty cycle corresponding to the first charge pump unit 3222 according to the first sampling current, the second sampling current, and the first sampling voltage, and adjust the second duty cycle corresponding to the second charge pump unit 3242 to achieve current sharing between the first voltage conversion branch 322 and the second voltage conversion branch 324 while maintaining the voltage at the second transmission end constant.

[0203] As an implementation manner, in the above second sub-mode, the control module 360 can adjust the first duty cycle corresponding to the first charge pump unit 3222 according to the first sampling current, the second sampling current, the first sampling voltage, and the second sampling voltage, and adjust the second duty cycle corresponding to the second charge pump unit 3242 to achieve current sharing between the first voltage conversion branch 322 and the second voltage conversion branch 324 while maintaining the voltage ratio between the first transmission end and the second transmission end constant.

[0204] In the embodiment of the present application, when the conversion module 320 is in the second working mode, the on-resistances of the continuously-conducting first switch (switch Q2) and the second switch (switch Q6) can be used as current sampling resistors for current sampling. Since the first switch and the second switch are continuously conducting, continuous current sampling can be maintained, the current sampling process will not be interrupted, and current sharing between the two branches can be achieved according to the first sampling current of the first voltage conversion branch 322 and the second sampling current of the second voltage conversion branch 324, improving the circuit efficiency without increasing the circuit cost, nor restricting the selection of the inductor, and improving the circuit performance and applicability.

[0205] In some embodiments, as Figure 16 shown, a chip 1600 is provided, and the chip 1600 may include the voltage regulation circuit 300 described in any of the above embodiments.

[0206] In some embodiments, an electronic device is provided, which may include the voltage regulation circuit 300 described in any of the above embodiments, or include the chip 1600 provided in the above embodiments.

[0207] In some embodiments, as Figure 17 shown, a voltage regulation method is provided, which may include the following steps:

[0208] Step 1710, transforming the input voltage through a transformation module to obtain an output voltage; the transformation module includes a first voltage transformation branch and a second voltage transformation branch.

[0209] Step 1720, independently controlling the first voltage transformation branch and the second voltage transformation branch to operate with a phase shift, so as to maintain the voltage at the second transmission end of the transformation module constant through the first charge pump unit and the first inductor in the first voltage transformation branch, and / or through the second charge pump unit and the second inductor in the second voltage transformation branch, or maintain the voltage ratio between the first transmission end and the second transmission end of the transformation module constant.

[0210] In one embodiment, step 1710 includes: providing a first supply voltage to the first transmission end of the transformation module through a battery module; performing a step-down process on the first supply voltage through the transformation module to obtain a first output voltage, and outputting the first output voltage to a load through the second transmission end of the transformation module.

[0211] Wherein, the first charge pump unit and the first inductor are used to maintain the constancy of the first output voltage, or maintain the voltage ratio between the first supply voltage and the first output voltage constant; the second charge pump unit and the second inductor are used to maintain the constancy of the first output voltage, or maintain the voltage ratio between the first supply voltage and the first output voltage constant.

[0212] In one embodiment, step 1710 includes: transforming the second supply voltage provided by a power supply device through a charge and discharge management module to obtain a third supply voltage, and outputting the third supply voltage to the second transmission end of the transformation module; performing a step-up process on the third supply voltage through the transformation module to obtain a second output voltage, and outputting the second output voltage through the first transmission end.

[0213] Wherein, the first charge pump unit and the first inductor are used to maintain the constancy of the third supply voltage input to the second transmission end, or maintain the voltage ratio between the third supply voltage input to the second transmission end and the second output voltage constant; the second charge pump unit and the second inductor are used to maintain the constancy of the third supply voltage input to the second transmission end, or maintain the voltage ratio between the third supply voltage input to the second transmission end and the second output voltage constant.

[0214] In one embodiment, step 1720 includes: adjusting a first duty cycle corresponding to a first charge pump unit according to a first sampling voltage corresponding to a second transmission end, generating a first driving signal according to the adjusted first duty cycle, and controlling a first voltage conversion branch to operate based on the first driving signal to maintain a constant voltage at the second transmission end of the conversion module; adjusting a second duty cycle corresponding to a second charge pump unit according to the first sampling voltage corresponding to the second transmission end, generating a second driving signal according to the adjusted second duty cycle, and controlling a second voltage conversion branch to operate based on the second driving signal to maintain a constant voltage at the second transmission end of the conversion module.

[0215] In one embodiment, step 1720 includes: generating a first driving signal according to a target duty cycle, and controlling a first voltage conversion branch to operate based on the first driving signal so that a voltage ratio between a first transmission end and a second transmission end is a target ratio; generating a second driving signal according to the target duty cycle, and controlling a second voltage conversion branch to operate based on the second driving signal so that the voltage ratio between the first transmission end and the second transmission end is the target ratio.

[0216] In one embodiment, step 1720 includes: adjusting a first duty cycle corresponding to a first charge pump unit according to a first sampling voltage corresponding to the second transmission end and a second sampling voltage corresponding to the first transmission end, generating a first driving signal according to the adjusted first duty cycle, and controlling a first voltage conversion branch to operate based on the first driving signal to maintain a constant voltage ratio between the first transmission end and the second transmission end;

[0217] adjusting a second duty cycle corresponding to a second charge pump unit according to the first sampling voltage corresponding to the second transmission end and the second sampling voltage corresponding to the first transmission end, generating a second driving signal according to the adjusted second duty cycle, and controlling a second voltage conversion branch to operate based on the second driving signal to maintain a constant voltage ratio between the first transmission end and the second transmission end.

[0218] In one embodiment, the method further includes: obtaining a first sampling current corresponding to the first voltage conversion branch; obtaining a second sampling current corresponding to the second voltage conversion branch; adjusting the first duty cycle corresponding to the first voltage conversion branch and / or adjusting the second duty cycle corresponding to the second voltage conversion branch according to the first sampling current and the second sampling current so that the first sampling current and the second sampling current tend to be the same.

[0219] In one embodiment, the first voltage conversion branch includes a first switch, and the first switch is continuously in an on state when the first inductor is operating; the second voltage conversion branch includes a second switch, and the second switch is continuously in an on state when the second inductor is operating;

[0220] The step of obtaining the first sampled current corresponding to the first voltage conversion branch includes: obtaining the first sampled current according to the voltage difference and the on-resistance corresponding to the first switch;

[0221] The step of obtaining the second sampled current corresponding to the second voltage conversion branch includes: obtaining the second sampled current according to the voltage difference and the on-resistance corresponding to the second switch.

[0222] In one embodiment, the above method further includes: when the voltage at the first transmission end is greater than or equal to the first voltage threshold, controlling the conversion module to be in the first working mode; when the voltage at the first transmission end is less than the first voltage threshold, controlling the conversion module to be in the second working mode.

[0223] Wherein, the first working mode is a mode in which the voltage ratio between the first transmission end and the second transmission end is not adjustable. In the first working mode, the first inductor and the second inductor do not work; the second working mode is a mode in which the voltage ratio between the first transmission end and the second transmission end is adjustable. In the second working mode, the first inductor and the second inductor work.

[0224] In one embodiment, the first working mode includes a first sub-mode and a second sub-mode. The first sub-mode is a mode in which the voltage at the second transmission end remains constant, and the second sub-mode is a mode in which the voltage ratio between the first transmission end and the second transmission end remains constant, and the voltage ratio corresponding to the second sub-mode is different from the voltage ratio corresponding to the first working mode.

[0225] The step of controlling the conversion module to be in the second working mode when the voltage at the first transmission end is less than the first voltage threshold includes: when the voltage at the first transmission end is less than the first voltage threshold and greater than or equal to the second voltage threshold, controlling the conversion module to be in the first sub-mode or the second sub-mode; when the voltage at the first transmission end is less than the second voltage threshold, controlling the conversion module to be in the first sub-mode.

[0226] In one embodiment, the step of controlling the conversion module to be in the first sub-mode or the second sub-mode when the voltage at the first transmission end is less than the first voltage threshold and greater than or equal to the second voltage threshold includes: when the voltage at the first transmission end is less than the first voltage threshold and greater than or equal to the third voltage threshold, controlling the conversion module to be in the first sub-mode; when the voltage at the first transmission end is less than the third voltage threshold and greater than or equal to the second voltage threshold, controlling the conversion module to be in the second sub-mode.

[0227] In one embodiment, the first voltage conversion branch further includes a first switch unit, and the first switch unit is connected in parallel with the first inductor. The second voltage conversion branch further includes a second switch unit, and the second switch unit is connected in parallel with the second inductor.

[0228] The above method further includes: when the conversion module is in the first working mode, controlling the first switch unit and the second switch unit to conduct; when the conversion module is in the second working mode, controlling the first switch unit and the second switch unit to disconnect.

[0229] In the embodiments of the present application, through the first voltage conversion branch and the second voltage conversion branch, the conversion module supports the functions of keeping the voltage at the second transmission end of the conversion module constant and keeping the voltage ratio between the first transmission end and the second transmission end of the conversion module constant, which can improve the voltage conversion ability of the conversion module; moreover, each of the first voltage conversion branch and the second voltage conversion branch includes an inductor, which improves the load-carrying capacity of the conversion module, and the first voltage conversion branch and the second voltage conversion branch work independently, and the first voltage conversion branch and the second voltage conversion branch work out of phase, which can reduce the ripple of the voltage output by the conversion module and improve the stability and performance of the voltage regulation circuit.

[0230] An embodiment of the present application discloses an electronic device, including a memory and a voltage regulation circuit. A computer program is stored in the memory. When the computer program is executed by a processor in the voltage regulation circuit, the voltage regulation circuit implements at least some steps of the methods described in the above embodiments.

[0231] An embodiment of the present application discloses a computer-readable storage medium that stores a computer program. When the computer program is executed by a processor, it implements at least some steps of the methods described in the above embodiments.

[0232] An embodiment of the present application discloses a computer program product, including a computer program. When the computer program is executable by a processor, it implements at least some steps of the methods described in the above embodiments.

[0233] It should be understood that the "one embodiment" or "an embodiment" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, the appearances of "in one embodiment" or "in an embodiment" throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. Those skilled in the art should also know that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily essential to the present application.

[0234] In various embodiments of the present application, it should be understood that the magnitudes of the serial numbers of the above processes do not necessarily mean the order of execution. The order of execution of each process should be determined according to its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

[0235] The units described above as separate components may or may not be physically separated. The components shown as units may or may not be physical units, i.e., they may be located in one place or may be distributed across multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0236] In addition, each functional unit in the embodiments of the present application may be integrated into one processing unit, may exist separately as individual physical units, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware or in the form of software functional units.

[0237] The technical features of the above-described embodiments may be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0238] The above has introduced in detail a voltage regulation circuit, a chip, an electronic device and a voltage regulation method disclosed in the embodiments of the present application. Specific examples are used herein to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application. At the same time, for those of ordinary skill in the art, based on the idea of the present application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present application.

Claims

1. A voltage regulation circuit, characterized in that, Comprising: A transformation module for transforming the input voltage to obtain an output voltage; The transformation module comprises: A first voltage transformation branch including a first charge pump unit and a first inductor. The first charge pump unit is respectively connected to the first transmission end and the second transmission end of the transformation module. The first inductor is connected to the second transmission end and is connected to the first transmission end through the first charge pump unit. The first charge pump unit and the first inductor are used to keep the voltage of the second transmission end constant or keep the voltage ratio between the first transmission end and the second transmission end constant. The second transmission end of the transformation module is connected to a load; A second voltage transformation branch including a second charge pump unit and a second inductor. The second charge pump unit is respectively connected to the first transmission end and the second transmission end. The second inductor is connected to the second transmission end and is connected to the first transmission end through the second charge pump unit. The second charge pump unit and the second inductor are used to keep the voltage of the second transmission end constant or keep the voltage ratio between the first transmission end and the second transmission end constant; The first voltage transformation branch and the second voltage transformation branch work independently and are out of phase with each other.

2. The voltage regulation circuit according to claim 1, wherein The voltage regulation circuit further includes a battery module connected to the first transmission end of the transformation module; The battery module is used to provide a first supply voltage to the first transmission end of the transformation module; The transformation module is used to step down the first supply voltage to obtain a first output voltage and output the first output voltage to the load through the second transmission end; The first charge pump unit and the first inductor are used to keep the first output voltage constant or keep the voltage ratio between the first supply voltage and the first output voltage constant; The second charge pump unit and the second inductor are used to keep the first output voltage constant or keep the voltage ratio between the first supply voltage and the first output voltage constant.

3. The voltage regulation circuit according to claim 1, wherein The voltage regulation circuit further includes a charge and discharge management module connected to the second transmission end of the transformation module; The charge and discharge management module is used to transform the second supply voltage provided by a power supply device to obtain a third supply voltage and output the third supply voltage to the second transmission end of the transformation module; The transformation module is used to step up the third supply voltage to obtain a second output voltage and output the second output voltage through the first transmission end; The first charge pump unit and the first inductor are used to keep the third supply voltage input to the second transmission end constant or keep the voltage ratio between the third supply voltage input to the second transmission end and the second output voltage constant; The second charge pump unit and the second inductor are used to keep the third supply voltage input to the second transmission end constant or keep the voltage ratio between the third supply voltage input to the second transmission end and the second output voltage constant.

4. The voltage regulating circuit according to claim 1, wherein The first charge pump unit includes a first switch group, and the first switch group is connected to the first inductor; the second charge pump unit includes a second switch group, and the second switch group is connected to the second inductor; The voltage regulation circuit further includes a control module and a first voltage sampling unit, and the control module is respectively connected to the first switch group, the second switch group, and the first voltage sampling unit; The first voltage sampling unit is configured to collect the voltage of the second transmission end to obtain a first sampling voltage; The control module is configured to adjust the duty cycle of at least some switches in the first switch group according to the first sampling voltage, so as to maintain the first sampling voltage at a target voltage; And adjust the duty cycle of at least some switches in the second switch group according to the first sampling voltage, so as to maintain the first sampling voltage at a target voltage.

5. The voltage regulating circuit according to claim 4, wherein When the voltage ratio between the first transmission end and the second transmission end remains constant, the duty cycle of each switch in the first switch group remains unchanged, and the duty cycle of each switch in the second switch group remains unchanged.

6. The voltage regulation circuit according to claim 4, wherein The voltage regulation circuit further includes a second voltage sampling unit, and the control module is further connected to the second voltage sampling unit; The second voltage sampling unit is configured to collect the voltage of the first transmission end to obtain a second sampling voltage; The control module is further configured to adjust the duty cycle of at least some switches in the first switch group according to the first sampling voltage and the second sampling voltage, so as to maintain the voltage ratio between the second sampling voltage and the first sampling voltage at a target ratio; And adjust the duty cycle of at least some switches in the second switch group according to the first sampling voltage and the second sampling voltage, so as to maintain the voltage ratio between the second sampling voltage and the first sampling voltage at a target ratio.

7. The voltage regulation circuit according to any one of claims 4 to 6, characterized in that The first charge pump unit further includes a first capacitor, the first switch group includes a first switch, the first switch is respectively connected to the first capacitor and the first end of the first inductor, and the second end of the first inductor is connected to the second transmission end; when the first inductor is working, the first switch is continuously in the on state; The second charge pump unit further includes a second capacitor, the second switch group includes a second switch, the second switch is respectively connected to the second capacitor and the first end of the second inductor, and the second end of the second inductor is connected to the second transmission end; when the second inductor is working, the second switch is continuously in the on state.

8. The voltage regulation circuit according to claim 7, wherein, The control module is further configured to obtain a first sampling current corresponding to the first voltage conversion branch according to the voltage difference and on-resistance corresponding to the first switch; obtain a second sampling current corresponding to the second voltage conversion branch according to the voltage difference and on-resistance corresponding to the second switch; And is configured to adjust the duty cycle of at least some switches in the first switch group, and / or adjust the duty cycle of at least some switches in the second switch group according to the first sampling current and the second sampling current, so that the first sampling current and the second sampling current tend to be the same.

9. The voltage regulation circuit according to claim 1, wherein, The transformation module is further configured to operate in a first operating mode when the voltage at the first transmission end is greater than or equal to a first voltage threshold; and operate in a second operating mode when the voltage at the first transmission end is less than the first voltage threshold. Wherein, the first operating mode is a mode in which the voltage ratio between the first transmission end and the second transmission end is non-adjustable. In the first operating mode, the first inductor and the second inductor do not operate. The second operating mode is a mode in which the voltage ratio between the first transmission end and the second transmission end is adjustable. In the second operating mode, the first inductor and the second inductor operate.

10. The voltage regulation circuit according to claim 9, wherein, The first operating mode includes a first sub-mode and a second sub-mode. The first sub-mode is a mode in which the voltage at the second transmission end remains constant. The second sub-mode is a mode in which the voltage ratio between the first transmission end and the second transmission end remains constant, and the voltage ratio corresponding to the second sub-mode is different from the voltage ratio corresponding to the first operating mode. The transformation module is further configured to operate in the first sub-mode or the second sub-mode when the voltage at the first transmission end is less than the first voltage threshold and greater than or equal to a second voltage threshold. When the voltage at the first transmission end is less than the second voltage threshold, it operates in the first sub-mode.

11. The voltage regulating circuit according to claim 10, wherein The transformation module is further configured to operate in the first sub-mode when the voltage at the first transmission end is less than the first voltage threshold and greater than or equal to a third voltage threshold; and operate in the second sub-mode when the voltage at the first transmission end is less than the third voltage threshold and greater than or equal to the second voltage threshold.

12. The voltage regulation circuit according to any one of claims 1 to 6, 8 to 11, characterized in that, The first voltage transformation branch further includes a first switch unit, and the first switch unit is connected in parallel with the first inductor. When the first switch unit is turned off, the first inductor operates. The second voltage transformation branch further includes a second switch unit, and the second switch unit is connected in parallel with the second inductor. When the second switch unit is turned off, the second inductor operates.

13. The voltage regulation circuit according to claim 12, wherein The first switch unit includes a third switch and a fourth switch, and the third switch and the fourth switch form a bidirectional switch. The second switch unit includes a fifth switch and a sixth switch, and the fifth switch and the sixth switch form a bidirectional switch. The fourth switch and the sixth switch are the same switch, or the fourth switch and the sixth switch are different switches.

14. A chip, characterized in that, It includes the voltage regulation circuit according to any one of claims 1 to 13.

15. An electronic device, characterized in that, It includes the voltage regulation circuit according to any one of claims 1 to 13, or includes the chip according to claim 14.

16. A voltage regulation method, characterized in that, It includes: The input voltage is transformed through a transformation module to obtain an output voltage; the transformation module includes a first voltage transformation branch and a second voltage transformation branch. Independently control the out-of-phase operation of the first voltage conversion branch and the second voltage conversion branch, so as to maintain the voltage at the second transmission end of the conversion module constant, or maintain the voltage ratio between the first transmission end and the second transmission end of the conversion module constant, through the first charge pump unit and the first inductor in the first voltage conversion branch, and / or through the second charge pump unit and the second inductor in the second voltage conversion branch.

17. The method according to claim 16, wherein The conversion of the input voltage by the conversion module to obtain an output voltage includes: Providing a first supply voltage to the first transmission end of the conversion module through the battery module; Step-down processing the first supply voltage through the conversion module to obtain a first output voltage, and outputting the first output voltage to the load through the second transmission end of the conversion module; The first charge pump unit and the first inductor are used to maintain the constancy of the first output voltage, or maintain the voltage ratio between the first supply voltage and the first output voltage constant; The second charge pump unit and the second inductor are used to maintain the constancy of the first output voltage, or maintain the voltage ratio between the first supply voltage and the first output voltage constant.

18. The method according to claim 16, wherein The conversion of the input voltage by the conversion module to obtain an output voltage includes: Converting the second supply voltage provided by the power supply device through the charge and discharge management module to obtain a third supply voltage, and outputting the third supply voltage to the second transmission end of the conversion module; Boosting the third supply voltage through the conversion module to obtain a second output voltage, and outputting the second output voltage through the first transmission end; The first charge pump unit and the first inductor are used to maintain the constancy of the third supply voltage input to the second transmission end, or maintain the voltage ratio between the third supply voltage input to the second transmission end and the second output voltage constant; The second charge pump unit and the second inductor are used to maintain the constancy of the third supply voltage input to the second transmission end, or maintain the voltage ratio between the third supply voltage input to the second transmission end and the second output voltage constant.

19. The method according to claim 16, wherein The independent control of the out-of-phase operation of the first voltage conversion branch and the second voltage conversion branch includes: Adjusting the first duty cycle corresponding to the first charge pump unit according to the first sampling voltage corresponding to the second transmission end, generating a first driving signal according to the adjusted first duty cycle, and controlling the operation of the first voltage conversion branch based on the first driving signal to maintain the voltage at the second transmission end of the conversion module constant; Adjusting the second duty cycle corresponding to the second charge pump unit according to the first sampling voltage corresponding to the second transmission end, generating a second driving signal according to the adjusted second duty cycle, and controlling the operation of the second voltage conversion branch based on the second driving signal to maintain the voltage at the second transmission end of the conversion module constant.

20. The method according to claim 16, characterized in that, The independent control of the out-of-phase operation of the first voltage conversion branch and the second voltage conversion branch includes: Generate a first driving signal according to a target duty cycle, and control the operation of the first voltage conversion branch based on the first driving signal, so that the voltage ratio between the first transmission end and the second transmission end is the target ratio; Generate a second driving signal according to the target duty cycle, and control the operation of the second voltage conversion branch based on the second driving signal, so that the voltage ratio between the first transmission end and the second transmission end is the target ratio.

21. The method according to claim 16, wherein The independent control of the out-of-phase operation of the first voltage conversion branch and the second voltage conversion branch includes: Adjust the first duty cycle corresponding to the first charge pump unit according to the first sampling voltage corresponding to the second transmission end and the second sampling voltage corresponding to the first transmission end, generate a first driving signal according to the adjusted first duty cycle, and control the operation of the first voltage conversion branch based on the first driving signal to maintain a constant voltage ratio between the first transmission end and the second transmission end; Adjust the second duty cycle corresponding to the second charge pump unit according to the first sampling voltage corresponding to the second transmission end and the second sampling voltage corresponding to the first transmission end, generate a second driving signal according to the adjusted second duty cycle, and control the operation of the second voltage conversion branch based on the second driving signal to maintain a constant voltage ratio between the first transmission end and the second transmission end.

22. The method according to claim 16, wherein The method further includes: Obtain a first sampling current corresponding to the first voltage conversion branch; Obtain a second sampling current corresponding to the second voltage conversion branch; Adjust the first duty cycle corresponding to the first voltage conversion branch and / or adjust the second duty cycle corresponding to the second voltage conversion branch according to the first sampling current and the second sampling current, so that the first sampling current and the second sampling current tend to be the same.

23. The method according to claim 16, wherein The first voltage conversion branch includes a first switch, and when the first inductor is working, the first switch is continuously in the on state; the second voltage conversion branch includes a second switch, and when the second inductor is working, the second switch is continuously in the on state; The obtaining of the first sampling current corresponding to the first voltage conversion branch includes: Obtain a first sampling current according to the voltage difference and on-resistance corresponding to the first switch; The obtaining of the second sampling current corresponding to the second voltage conversion branch includes: Obtain a second sampling current according to the voltage difference and on-resistance corresponding to the second switch.

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