Voltage conversion circuit, chip, electronic device and voltage conversion method

Abstract

The embodiment of the invention discloses a voltage conversion circuit, a chip, electronic equipment and a voltage conversion method. The voltage conversion circuit comprises a battery used for outputting a first power supply voltage; the booster circuit is used for boosting the first power supply voltage to obtain second power supply voltage, and the second power supply voltage is used for supplying power to a load; the booster circuit comprises an adjusting unit and an inductor, the adjusting unit is connected with the battery, a first end of the inductor is connected with the adjusting unit, and a second end of the inductor is connected with the load; the adjusting unit is used for adjusting the voltage of the first end of the inductor so that the voltage of the first end of the inductor can be larger than or equal to the first power supply voltage. According to the voltage conversion circuit, the chip, the electronic equipment and the voltage conversion method, the inductive current in the booster circuit can be reduced, so that the size of an inductor can be greatly reduced.

Description

[0001] This application claims priority to the Chinese patent application filed on November 19, 2024, with application number 2024116627929 and invention name “Voltage conversion circuit, chip, electronic device and voltage conversion method”, all contents of which are incorporated by reference in this application. Technical Field

[0002] The present application relates to the technical field of electronic circuits, and in particular to a voltage conversion circuit, a chip, an electronic device and a voltage conversion method. Background Art

[0003] With the rapid development of battery technology, silicon negative electrode batteries are increasingly used in the use of electronic devices. Compared with traditional graphite negative electrode batteries, silicon negative electrode batteries have higher energy density and can better solve the problem of battery life of electronic devices. However, the minimum discharge voltage of silicon negative electrode batteries is low, usually 2.7V (volts) or even 2.5V, and the load in the electronic device cannot work normally at such a low voltage. Therefore, it is necessary to boost the discharge voltage of the silicon negative electrode battery through a boost circuit to ensure the normal operation of the load. At present, due to the large peak current of the inductor in the boost circuit, the required inductor is large in size, which has become a technical problem that needs to be solved urgently. Summary of the invention

[0004] The embodiments of the present application disclose a voltage conversion circuit, a chip, an electronic device and a voltage conversion method, which can reduce the inductor current in the boost circuit, thereby significantly reducing the volume of the inductor.

[0005] The embodiment of the present application discloses a voltage conversion circuit, including:

[0006] A battery, configured to output a first supply voltage;

[0007] a boost circuit, used for boosting the first supply voltage to obtain a second supply voltage, wherein the second supply voltage is used to supply power to a load;

[0008] The boost circuit includes an adjustment unit and an inductor, wherein the adjustment unit is connected to the battery, a first end of the inductor is connected to the adjustment unit, and a second end of the inductor is connected to the load;

[0009] The regulating unit is used to regulate the voltage at the first end of the inductor so that the voltage at the first end of the inductor is greater than or equal to the first supply voltage.

[0010] An embodiment of the present application discloses a chip, comprising the voltage conversion circuit as described above.

[0011] An embodiment of the present application discloses an electronic device, including the voltage conversion circuit as described above, or including the chip as described above.

[0012] The present application discloses a voltage conversion method, including:

[0013] A first power supply voltage output by a battery is boosted by a boost circuit to obtain a second power supply voltage, wherein the second power supply voltage is used to supply power to a load; the boost circuit comprises an adjustment unit and an inductor, wherein the adjustment unit is connected to the battery, a first end of the inductor is connected to the adjustment unit, and a second end of the inductor is connected to the load;

[0014] The voltage at the first end of the inductor is adjusted by the adjustment unit so that the voltage at the first end of the inductor is greater than or equal to the first supply voltage.

[0015] The voltage conversion circuit, chip, electronic device and voltage conversion method disclosed in the embodiment of the present application, the voltage conversion circuit includes a battery and a boost circuit, the boost circuit is used to boost the first power supply voltage output by the battery to obtain a second power supply voltage, the second power supply voltage is used to power the load, the boost circuit includes an adjustment unit and an inductor, the adjustment unit is connected to the battery, the first end of the inductor is connected to the adjustment unit, the second end of the inductor is connected to the load, and the adjustment unit is used to adjust the voltage of the first end of the inductor so that the voltage of the first end of the inductor is greater than or equal to the first power supply voltage. In the embodiment of the present application, the voltage of the first end of the inductor is changed by the adjustment unit in the boost circuit so that the voltage of the first end of the inductor is greater than or equal to the first power supply voltage output by the battery. When the output power of the boost circuit remains unchanged, the voltage of the first end of the inductor (which can be understood as the input end of the inductor) increases, which can reduce the inductor current input to the inductor, thereby greatly reducing the volume of the inductor, reducing the area of ​​the boost circuit on the circuit board and reducing the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a circuit diagram of a boost circuit in the related art;

[0018] Figure 2 is a structural block diagram of a voltage conversion circuit in one embodiment;

[0019] Figure 3 is a structural block diagram of a voltage conversion circuit in another embodiment;

[0020] Figure 4 is a circuit diagram of a voltage conversion circuit in one embodiment;

[0021] Figure 5 is a schematic diagram of an equivalent circuit in which a switch unit is in a first conducting state in an embodiment;

[0022] Figure 6 is a schematic diagram of an equivalent circuit in which a switch unit is in a second conducting state in one embodiment;

[0023] Figure 7 is a structural block diagram of a voltage conversion circuit in another embodiment;

[0024] Figure 8 is a circuit diagram of a sampling module in one embodiment;

[0025] Fig. 9 is a structural block diagram of a voltage conversion circuit in another embodiment;

[0026] Fig.10 is a circuit diagram of a voltage conversion circuit in another embodiment;

[0027] Fig.11 is a circuit diagram of a voltage conversion circuit in another embodiment;

[0028] Fig.12 A schematic diagram of the operation of switches in a two-phase boost circuit in one embodiment;

[0029] Fig.13 is a circuit diagram of a voltage conversion circuit in another embodiment;

[0030] Fig.14 is a structural block diagram of a chip in an embodiment;

[0031] Fig.15 FIG. 4 is a flow chart of a voltage conversion method in one embodiment. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0033] It should be noted that the terms "including" and "having" and any variations thereof in the embodiments of the present application and the accompanying drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products or devices.

[0034] It is understood that the terms "first", "second", etc. used in this application can be used in this article to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish the first element from another element. For example, without departing from the scope of this application, the first switch can be called the second switch, and similarly, the second switch can be called the first switch. Both the first switch and the second switch are switches, but they are not the same switch. The term "multiple" used in this application refers to two or more. The term "and / or" used in this application refers to one of the schemes, or any combination of multiple schemes. The term "connection" used in this application should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can 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 the specific circumstances.

[0035] The minimum discharge voltage of the widely used graphite negative electrode batteries on the market is generally above 3.2V, and the loads of most electronic devices are designed based on graphite negative electrode batteries. Therefore, the power supply voltage required for the loads of most electronic devices must be above 3.2V. Silicon negative electrode batteries have higher energy density than graphite negative electrode batteries, but the minimum discharge voltage will be lower, at 2.7V or even 2.5V, which will cause some loads to be unable to work normally at such a low voltage. Therefore, the discharge voltage of the silicon negative electrode battery needs to be boosted by a boost circuit to ensure the normal operation of the load.

[0036] For example, Figure 1 FIG. 1 is a circuit diagram of a boost circuit in the related art. Figure 1 As shown, the boost circuit 100 may include an input capacitor Cin, an inductor L1, a switch Q1, a switch Q2, and an output capacitor Cout, and the positive terminal of the battery BAT may be connected to the input capacitor Cin and the inductor L1, respectively. When the switch Q1 is turned on and the switch Q2 is turned off, the inductor L1 stores energy, and the output capacitor Cout mainly supplies power to the load; when the switch Q1 is turned off and the switch Q2 is turned on, the inductor L1 discharges and supplies power to the load, thereby boosting the discharge voltage of the battery BAT to the power supply voltage required by the load.

[0037] When the electronic device is in a high-load scenario such as gaming or taking photos, the maximum current at the output of the boost circuit 100 is usually above 10A (amperes), and as the discharge voltage of the battery drops below 2.5V, and may drop below 2V in a transient state, the maximum average current of the inductor L1 in the boost circuit 100 reaches above 15A, and considering the peak current of the inductor L1, the peak current of the inductor L1 may exceed 20A. Due to the limited circuit board space in electronic devices, the height of the inductor L1 is usually limited to less than 1mm (millimeter), and the current inductor process cannot achieve a 20A overcurrent capacity at a height of 1mm. Therefore, the inductor has become the biggest bottleneck limiting the power in the boost circuit solution.

[0038] The current solutions are to use multiple correlated boost circuits, but too many phases are required, resulting in increased costs. Another solution is to limit the use of electronic devices in low-power situations, such as limiting CPU (Central Processing Unit) frequency, screen brightness, RF performance, etc., thereby reducing load current. However, this solution seriously affects the user experience.

[0039] The embodiments of the present application disclose a voltage conversion circuit, a chip, an electronic device, and a voltage conversion method, which can reduce the inductor current in the boost circuit, thereby significantly reducing the volume of the inductor, reducing the area of ​​the boost circuit on the circuit board and reducing the cost. Moreover, it can meet the user's use needs when the electronic device is in a low-power state without reducing the performance of the electronic device, thereby improving the user's use experience.

[0040] like Figure 2 As shown, in one embodiment, a voltage conversion circuit 200 is provided. The voltage conversion circuit 200 may include a battery 210 and a boost circuit 220 , wherein the battery 210 may be connected to the boost circuit 220 , and the boost circuit 220 may be connected to a load 300 .

[0041] The battery 210 is used to output a first supply voltage.

[0042] The battery 210 may output a first supply voltage, which may be a discharge voltage of the battery 210 .

[0043] In some embodiments, the battery 210 may be a battery with a relatively low minimum discharge voltage, such as a silicon negative electrode battery, and the minimum discharge voltage may refer to the minimum value of the first supply voltage output by the battery 210. For example, the minimum discharge voltage of the battery 210 may be less than 3V. Further, the minimum discharge voltage may be less than the target supply voltage required by the load 300, and the target supply voltage required by the load 300 may refer to the supply voltage required for the normal operation of the load 300. When the first supply voltage output by the battery 210 is relatively low, it needs to be boosted by the boost circuit 220 to obtain a supply voltage that allows the load 300 to operate normally.

[0044] The boost circuit 220 is used to boost the first supply voltage to obtain a second supply voltage, and the second supply voltage is used to supply power to the load 300.

[0045] The boost circuit 220 can boost the first supply voltage output by the battery 210 to obtain a second supply voltage that meets the normal working requirements of the load 300, and use the second supply voltage to power the load 300. Optionally, the second supply voltage output by the boost circuit 220 can be greater than or equal to the target supply voltage required by the load 300, thereby ensuring the normal operation of the load 300.

[0046] The boost circuit 220 may include a regulating unit 222 and an inductor 224 . The regulating unit 222 may be connected to the battery 210 , a first end of the inductor 224 may be connected to the regulating unit 222 , and a second end of the inductor 224 may be connected to the load 300 .

[0047] The regulating unit 222 is used to regulate the voltage at the first end of the inductor 224 so that the voltage at the first end of the inductor 224 is greater than or equal to the first supply voltage.

[0048] The first end of the inductor 224 can be understood as the input end of the inductor 224, and the second end of the inductor 224 can be understood as the output end of the inductor 224. The first end of the inductor 224 can be connected to the adjustment unit 222, and the adjustment unit 222 can also be connected to the output end of the battery 210. The adjustment unit 222 can adjust the voltage of the first end of the inductor 224 based on the first power supply voltage output by the battery 210, so that the voltage of the first end of the inductor 224 is greater than or equal to the first power supply voltage, and the adjustment unit 222 and the inductor 224 jointly boost the first power supply voltage to obtain the second power supply voltage.

[0049] In some embodiments, the regulating unit 222 regulates the voltage at the first end of the inductor 224 so that the average voltage at the first end of the inductor 224 in a target cycle is greater than the first supply voltage, wherein the target cycle may be a preset working cycle corresponding to the boost circuit 220, and the boost circuit 220 performs cyclic operation according to the target cycle, and further, the working state of the boost circuit 220 is repeated in each target cycle.

[0050] When the output power of the inductor 224 remains unchanged, based on the law of energy conservation, in an ideal state (without considering the conversion efficiency), the input power of the inductor 224 is equal to the output power of the inductor 224. Therefore, when the average voltage at the first end of the inductor 224 in the target cycle is greater than the first supply voltage, compared with Figure 1 In the boost circuit shown, the voltage at the input end of the inductor L1 always maintains the discharge voltage of the battery BAT. In the embodiment of the present application, the voltage at the first end of the inductor 224 is increased, so the input current at the first end of the inductor 224 can be effectively reduced.

[0051] In the embodiment of the present application, the voltage at the first end of the inductor 224 is changed by the regulating unit 222 in the boost circuit 220, so that the voltage at the first end of the inductor 224 is greater than or equal to the first supply voltage output by the battery 210. When the output power of the boost circuit 220 remains unchanged, the voltage at the first end of the inductor 224 (which can be understood as the input end of the inductor) increases, which can reduce the inductor current input to the inductor 224, thereby greatly reducing the volume of the inductor, reducing the area of ​​the boost circuit on the circuit board and reducing the cost.

[0052] In some embodiments, the regulating unit 222 is further used to regulate the voltage at the first end of the inductor 224 so that the voltage at the first end of the inductor 224 is equal to the first supply voltage, or equal to N times the first supply voltage, where N is an integer greater than 1.

[0053] The adjustment unit 222 can adjust the voltage of the first end of the inductor 224. The voltage of the first end of the inductor 224 can vary between the first supply voltage and N times the first supply voltage. N can be an integer greater than 1, for example, N can be 2, 3, etc., but is not limited thereto. Since the voltage of the first end of the inductor 224 varies between the first supply voltage and N times the first supply voltage, compared to Figure 1 In the related art shown, the voltage at the input end of the inductor L1 always maintains the discharge voltage of the battery BAT, which increases the voltage at the first end of the inductor 224 , thereby effectively reducing the input current at the first end of the inductor 224 .

[0054] In some embodiments, the adjustment unit 222 is further configured to be in a first working state during a first time period of a target cycle so that the voltage at the first end of the inductor 224 is equal to the first supply voltage; and to be in a second working state during a second time period of the target cycle so that the voltage at the first end of the inductor 224 is less than or equal to N times the first supply voltage.

[0055] Each target cycle of the boost circuit 220 may include a first time period and a second time period, and the target cycle may be equal to the sum of the first time period and the second time period. The regulating unit 222 may be in different working states in the first time period and the second time period of the target cycle, respectively. In the first time period of the target cycle, the regulating unit 222 may be in the first working state so that the voltage at the first end of the inductor 224 is equal to the first supply voltage. In the second time period of the target cycle, the regulating unit 222 may be in the second working state so that the voltage at the first end of the inductor 224 is less than or equal to N times the first supply voltage.

[0056] Further, in the first time period of the target cycle, the adjustment unit 222 is in the first working state, the first end of the inductor 224 can be connected to the output end of the battery 210, and the voltage of the first end of the inductor 224 is equal to the first power supply voltage output by the battery 210. The second end of the inductor 224 is connected to the load 300, and the voltage of the second end of the inductor 224 can be equal to the second power supply voltage output by the boost circuit 220. Since the second power supply voltage is greater than the first power supply voltage, the voltage of the second end of the inductor 224 is greater than the voltage of the first end of the inductor 224 in the first time period of the target cycle, and the inductor current of the inductor 224 can be reduced.

[0057] In the second time period of the target cycle, the adjustment unit 222 is in the second working state, and the adjustment unit 222 adjusts the voltage of the first end of the inductor 224. The voltage of the first end of the inductor 224 can vary between N times the first power supply voltage and a first voltage value, and the first voltage value can be a voltage value greater than or equal to the first power supply voltage. Optionally, in the second time period of the target cycle, the voltage of the first end of the inductor 224 can be greater than the voltage of the second end of the inductor 224, and the inductor current of the inductor 224 can increase.

[0058] In the target cycle, the voltage at the second end of the inductor 224 remains unchanged, and the output power remains unchanged. The average voltage at the first end of the inductor 224 is greater than the first supply voltage. Figure 1 The inductor current of the inductor L1 shown is the input current, and the inductor current of the inductor 224 in the embodiment of the present application is the output current, especially considering the conversion efficiency of the boost circuit at high power, Figure 1 The inductor current of the inductor L1 shown is much larger than the inductor current of the inductor 224 in the embodiment of the present application, thereby significantly reducing the inductor current of the inductor 224 .

[0059] like Figure 3 As shown, in one embodiment, the regulating unit 222 may include a switch unit 2222 and a first capacitor 2224, and the switch unit 2222 may be respectively connected to the battery 210, the first end of the inductor 224, and the first capacitor 2224. Further, the first capacitor 2224 may also be connected to the first end of the inductor 224.

[0060] The switch unit 2222 is configured to be in a first on state in a first time period of a target cycle, so that the first capacitor 2224 stores electrical energy, and the voltage at the first end of the inductor 224 is equal to the first supply voltage.

[0061] The regulating unit 222 is in the first working state, which may refer to a state in which the switch unit 2222 is in the first conducting state and the first capacitor 2224 stores electric energy.

[0062] During the first time period of the target cycle, the switch unit 2222 may be in a first conduction state, the first end of the inductor 224 is directly connected to the output end of the battery 210, the battery 210 may output a first supply voltage to the inductor 224 and the first capacitor 2224 respectively, the first capacitor 2224 may be charged based on the first supply voltage output by the battery 210, the first capacitor 2224 stores electrical energy, and the first end of the inductor 224 is directly connected to the output end of the battery 210, and the first end of the inductor 224 is equal to the first supply voltage output by the battery 210.

[0063] The switch unit 2222 is further configured to be in a second conduction state in a second time period of the target cycle, so that the first capacitor 2224 releases electrical energy, and the voltage at the first end of the inductor 224 is less than or equal to twice the first supply voltage.

[0064] The regulating unit 222 is in the second working state, which may refer to a state in which the switch unit 2222 is in the second conducting state and the first capacitor 2224 releases electric energy.

[0065] In the second time period of the target cycle, the switch unit 2222 may be in the second conduction state, the first end of the inductor 224 may be connected to the first capacitor 2224, and the first capacitor 2224 may release electric energy to the inductor 224. Further, the battery 210 and the first capacitor 2224 may jointly output electric energy to the inductor 224. The voltage at the first end of the inductor 224 may be equal to the sum of the first supply voltage output by the battery 210 and the capacitor voltage corresponding to the first capacitor 2224.

[0066] Exemplarily, during the first time period of the target cycle, the first capacitor 2224 stores electrical energy, and the capacitor voltage of the first capacitor 2224 may be equal to the first power supply voltage output by the battery 210; when entering the second time period of the target cycle, since the voltage at the first end of the inductor 224 may be equal to the sum of the first power supply voltage output by the battery 210 and the capacitor voltage corresponding to the first capacitor 2224, and at this time the capacitor voltage of the first capacitor 2224 is equal to the first power supply voltage output by the battery 210, the voltage at the first end of the inductor 224 may be equal to 2 times the first power supply voltage. Optionally, as the first capacitor 2224 releases electrical energy, the capacitor voltage of the first capacitor 2224 gradually decreases, and the voltage at the first end of the inductor 224 may also decrease accordingly.

[0067] It should be noted that if the frequency of the switch unit 2222 is relatively large, that is, the frequency of switching the switch unit 2222 between the first conduction state and the second conduction state is relatively fast, then the electric energy released by the first capacitor 2224 in each target cycle is relatively small, and the voltage at the first end of the inductor 224 can be maintained at 2 times the first supply voltage or slightly less than 2 times the first supply voltage.

[0068] It should be noted that, since the first capacitor 2224 may have some voltage loss, when entering the second time period of the target cycle, the capacitor voltage of the first capacitor 2224 may also be slightly less than the first supply voltage output by the battery 210. Optionally, the first capacitor 2224 may use a capacitor with a larger capacity, but it is also necessary to consider the structural space of the electronic device to avoid the first capacitor 2224 occupying too large an area of ​​the circuit board.

[0069] As an implementation method, Figure 4 As shown, the inductor 224 may include an inductor L2, and the first capacitor 2224 may include a first capacitor C1. The switch unit 2222 may include a first switch Q3, a second switch Q4, and a third switch Q5, which may be connected in series, a connection midpoint between the first switch Q3 and the second switch Q4 may be connected to the battery 210, a connection midpoint between the second switch Q4 and the third switch Q5 may be connected to the first end of the first capacitor C1, and the first switch Q3 may be connected to the first end of the inductor L2 and the second end of the first capacitor C1, respectively.

[0070] It should be noted that the connection midpoint between the first switch Q3 and the second switch Q4 can be any node on the connection circuit between the first switch Q3 and the second switch Q4, and can be used to connect with other circuits or electronic devices. The connection midpoint between the second switch Q4 and the third switch Q5 can be any node on the connection circuit between the second switch Q4 and the third switch Q5, and can be used to connect with other circuits or electronic devices. The connection midpoint between the first switch Q3 and the second switch Q4 is not necessarily the center point of the connection circuit between the first switch Q3 and the second switch Q4, and the connection midpoint between the second switch Q4 and the third switch Q5 is not necessarily the center point of the connection circuit between the second switch Q4 and the third switch Q5.

[0071] Furthermore, a connection midpoint between the first switch Q3 and the second switch Q4 may be connected to the output terminal of the battery 210 (ie, the positive terminal of the battery 210 ), and the third switch Q5 may also be grounded.

[0072] The above-mentioned target cycle may refer to a cycle in which the first switch Q3, the second switch Q4 and the third switch Q5 switch on and off. The first switch Q3, the second switch Q4 and the third switch Q5 have the same switching action in each target cycle. The duration of each target cycle may be determined by the operating frequency of the first switch Q3, the second switch Q4 and the third switch Q5. The first time period and the second time period of the target cycle may be determined by the duty cycle of the drive signal controlling the first switch Q3, the second switch Q4 and the third switch Q5. Optionally, the drive signal may include but is not limited to a PWM (Pulse width modulation) signal, etc. By adjusting the duty cycle of the PWM signal, the first time period and the second time period of each target cycle may be adjusted.

[0073] In some embodiments, the first conduction state may include the first switch Q3 and the third switch Q5 being turned on, and the second switch Q4 being turned off. In the first conduction state, the first end of the first capacitor C1 is grounded through the third switch Q5, and the inductor L2 is connected to the positive terminal of the battery 210 through the first switch Q3. The voltage at the second end of the first capacitor C1 and the voltage at the first end of the inductor L2 are equal to the first power supply voltage output by the battery 210. The first capacitor C1 is charged based on the first power supply voltage output by the battery 210, and the first capacitor C1 stores electrical energy. Further, the inductor L2 and the output capacitor Cout can supply power to the load.

[0074] For example, Figure 5 FIG. 1 is a schematic diagram of an equivalent circuit in which a switch unit is in a first conducting state in an embodiment. Figure 5As shown, in the first time period of the target cycle, the first switch Q3 and the third switch Q5 are turned on, and the second switch Q4 is turned off, then the output end (i.e., the positive end) of the battery 210 is respectively connected to the second end of the first capacitor C1 and the first end of the inductor L2, and the first power supply voltage Vin output by the battery 210 can be transmitted to the first capacitor C1 and the inductor L2 respectively to charge the first capacitor C1, and the voltage V1 at the first end of the inductor L2 is equal to the first power supply voltage Vin output by the battery 210, and the inductor L2 and the output capacitor Cout jointly provide the second power supply voltage Vsys to the load. Further, the capacitor voltage of the first capacitor C1 can reach the first power supply voltage Vin.

[0075] In some embodiments, the second conduction state may include the first switch Q3 and the third switch Q5 being disconnected, and the second switch Q4 being turned on. In the second conduction state, the first end of the first capacitor C1 is connected to the output end (i.e., the positive end) of the battery 210 through the second switch Q4, and the second end of the first capacitor C1 is connected to the inductor L2, and the first capacitor C1 and the inductor L2 become a series connection relationship, then the voltage of the first end of the inductor L2 is equal to the sum of the first power supply voltage output by the battery 210 and the capacitor voltage of the first capacitor C1. Further, when entering the second time period of the target cycle, since the capacitor voltage of the first capacitor C1 is equal to the first power supply voltage output by the battery 210 at this time, the voltage of the first end of the inductor L2 can be equal to 2 times the first power supply voltage. In the second time period of the target cycle, the first capacitor C1 releases electrical energy, and the first capacitor C1 and the inductor L2 can jointly power the load.

[0076] For example, Figure 6 FIG. 1 is a schematic diagram of an equivalent circuit in which the switch unit is in the second conducting state in one embodiment. Figure 6 As shown, in the second time period of the target cycle, the first switch Q3 and the third switch Q5 are turned off, the second switch Q4 is turned on, the first capacitor C1 is connected to the output end (i.e., the positive end) of the battery 210 and the first end of the inductor L2 respectively, the first capacitor C1 and the inductor L2 are in a series connection relationship, and the voltage V1 at the first end of the first inductor L2 = the first power supply voltage Vin output by the battery 210 + the capacitor voltage VC1 of the first capacitor C1. Among them, the capacitor voltage VC1 of the first capacitor C1 refers to the voltage difference between the two ends of the first capacitor C1. When entering the second time period of the target cycle, the capacitor voltage VC1 of the first capacitor C1 is equal to the first power supply voltage Vin output by the battery 210. Therefore, the voltage V1 at the first end of the first inductor L2 = 2*Vin. The first capacitor C1 and the inductor L2 can jointly provide the second power supply voltage Vsys to the load.

[0077] In the embodiment of the present application, by controlling the conduction states of the first switch Q3, the second switch Q4, and the third switch Q5, the structural relationship between the first capacitor C1 and the inductor L2 can be changed, so that the voltage at the first end of the inductor L2 can be regulated, and the average voltage at the first end of the inductor L2 in a target cycle can be increased, thereby effectively reducing the inductor current of the inductor L2, reducing the volume required for the inductor L2, reducing the area of ​​the boost circuit 220 on the circuit board, and reducing the cost.

[0078] In the embodiment of the present application, by controlling the switch unit 2222 to switch between the first conduction state and the second conduction state within the target cycle, the adjustment unit 222 can be placed in different working states. While satisfying the requirement that the boost circuit 220 boosts the first supply voltage output by the battery 210 to ensure the normal operation of the load, the inductor current of the inductor L2 can be reduced, thereby overcoming the technical difficulty in the related art that the inductor current of the inductor of the boost circuit is too large when using a silicon negative electrode battery.

[0079] In some embodiments, the first time period and the second time period of the target cycle may be determined according to the target power supply voltage required by the load 300. The first time period and the second time period of the target cycle may be adjusted according to the target power supply voltage required by the load 300.

[0080] Further, the second supply voltage output by the boost circuit 220 may be equal to the target difference multiplied by the first supply voltage output by the battery 210, and the target difference may be N minus the target duty cycle, and the target duty cycle matches the first time period. The target duty cycle may refer to the duty cycle of the switch unit 2222 in the first on state.

[0081] Taking N equals 2 as an example, assuming that the target duty cycle corresponding to the switch unit 2222 being in the first conduction state in a target cycle is D, and the target duty cycle D matches the first time period, then the duty cycle corresponding to the switch unit 2222 being in the second conduction state in a target cycle may be 1-D, and the duty cycle 1-D matches the second time period.

[0082] Based on the volt-second balance principle, the average value of the inductor voltage in a target cycle is 0, the voltage at the first end of the inductor 224 is equal to the first power supply voltage in the first time period, and the voltage at the first end of the inductor 224 is less than or equal to 2 times the first power supply voltage in the second time period. Since the operating frequency of the switch unit 2222 is relatively fast, the voltage at the first end of the inductor 224 in the second time period can also be considered to be equal to 2 times the first power supply voltage. It can be obtained that: Vsys = Vin*D + 2Vin*(1-D) = Vin*(2-D), where Vsys represents the second power supply voltage output by the boost circuit 220, Vin represents the first power supply voltage output by the battery 210, and the target duty cycle D can be greater than 0 and less than 1.

[0083] Therefore, the second power supply voltage Vsys can be changed between the first power supply voltage Vin and twice the first power supply voltage (i.e., 2*Vin) by changing the target duty cycle D. When the target power supply voltage required by the load is constant, if the first power supply voltage output by the battery 210 becomes smaller, the target duty cycle D can be adjusted to adjust the first time period and the second time period of the target cycle, and the duration of the switch unit 2222 being in the first on state and the duration of the switch unit 2222 being in the second on state can be controlled so that the second power supply voltage output by the boost circuit 220 is greater than or equal to the target power supply voltage required by the load 300.

[0084] In the embodiment of the present application, the target duty cycle D can be determined according to the target power supply voltage required by the load 300 to adjust the first time period and the second time period of the target cycle, thereby ensuring that the boost circuit 220 outputs a second power supply voltage that meets the working requirements of the load 300, and ensuring that the load 300 can work normally when the first power supply voltage output by the battery 210 is small (that is, when the power is low), thereby meeting the user's usage requirements and improving the user's usage experience.

[0085] In some embodiments, a closed-loop control method may be used to adjust the first time period and the second time period of the target cycle, that is, the target duty cycle may be adjusted by a closed-loop control method. Figure 7 As shown, the voltage conversion circuit 200 may further include a sampling module 230 and a control module 240 . The sampling module 230 may be connected to the output end of the boost circuit 220 and the control module 240 , respectively. Furthermore, the sampling module 230 may be connected to the second end of the inductor 224 of the boost circuit 220 .

[0086] The sampling module 230 is used to sample the second supply voltage output by the boost circuit 220 to obtain a sampling signal.

[0087] The control module 240 is used to adjust the first time period and the second time period of the target cycle according to the sampling signal and the target power supply voltage.

[0088] The sampling module 230 can sample the second supply voltage output by the boost circuit 220 to obtain a sampling signal, which can be a voltage signal. For example, the sampling signal can be a voltage signal obtained by dividing the second supply voltage output by the boost circuit 220 .

[0089] For example, Figure 8As shown, the sampling module 230 may include a first voltage-dividing resistor R1 and a second voltage-dividing resistor R2, the first voltage-dividing resistor R1 and the second voltage-dividing resistor R2 may be connected in series, and the connection midpoint of the first voltage-dividing resistor R1 and the second voltage-dividing resistor R2 may be connected to the control module 240. The second supply voltage output by the boost circuit 220 may be divided by the first voltage-dividing resistor R1 and the second voltage-dividing resistor R2 to obtain a sampling signal, and then the sampling signal is sent to the control module 240.

[0090] Optionally, the sampling signal output by the sampling module 230 may also be a digital signal, used to represent the voltage value of the second supply voltage output by the boost circuit 220 .

[0091] The control module 240 may obtain the target power supply voltage required by the load 300. For example, the control module 240 may receive the voltage value of the target power supply voltage required by the load 300 sent by the processor through a communication method such as I2C (Inter-Integrated Circuit).

[0092] The control module 240 can adjust the first time period and the second time period of the target cycle according to the sampling signal and the target power supply voltage output by the sampling module 230. The control module 240 can determine the voltage difference between the second power supply voltage output by the boost circuit 220 and the target power supply voltage according to the sampling signal and the target power supply voltage, and adjust the first time period and the second time period of the target cycle according to the voltage difference.

[0093] Furthermore, the control module 240 can be connected to the switch unit 2222. The control module 240 can adjust the target duty cycle corresponding to the drive signal (such as a PWM signal) used to control the operation of the switch unit 2222 according to the sampling signal and the target supply voltage. The target duty cycle matches the first time period, thereby adjusting the first time period and the second time period of the target cycle.

[0094] For example, if the second power supply voltage output by the boost circuit 220 is less than the target power supply voltage, since the second power supply voltage output by the boost circuit 220 may be equal to the target difference multiplied by the first power supply voltage output by the battery 210, the target difference may be N minus the target duty cycle, such as the second power supply voltage Vsys=Vin*(2-D), then the second power supply voltage output by the boost circuit 220 is negatively correlated with the target duty cycle, and the target duty cycle may be reduced, the first time period may be reduced, and the second time period may be increased, thereby increasing the second power supply voltage output by the boost circuit 220, so that the second power supply voltage output by the boost circuit 220 reaches the target power supply voltage.

[0095] For another example, if the second power supply voltage output by the boost circuit 220 is greater than the target power supply voltage, the target duty cycle may not be adjusted, or the target duty cycle may be increased, the first time period may be increased, and the second time period may be decreased, thereby reducing the second power supply voltage output by the boost circuit 220, so that the second power supply voltage output by the boost circuit 220 is reduced to the target power supply voltage.

[0096] As an implementation method, the sampling signal may be a digital signal, and the digital signal indicates the voltage value of the second power supply voltage. Then the control module 240 may be a digital control chip. The control module 240 may compare the sampling signal with the voltage value of the target power supply voltage, and adjust the target duty cycle according to the comparison result. For example, the control module 240 may determine whether the sampling signal is less than the voltage value of the target power supply voltage. If the sampling signal is less than the voltage value of the target power supply voltage, it means that the second power supply voltage output by the boost circuit 220 does not reach the target power supply voltage required by the load 300. Then the target duty cycle may be reduced, and the drive signal of the switch unit 2222 may be generated based on the reduced target duty cycle. Furthermore, the drive signals corresponding to the first switch Q3, the second switch Q4, and the third switch Q5 in the switch unit 2222 may be generated based on the reduced target duty cycle.

[0097] As another implementation, the sampling signal may be a voltage signal obtained by dividing the second supply voltage output by the boost circuit 220. For example, Fig. 9 As shown, the control module 240 may include a compensation unit 242 and a driving unit 244 . The compensation unit 242 may be connected to the sampling module 230 and the driving unit 244 , respectively. The driving unit 244 may be connected to the switch unit 2222 .

[0098] The compensation unit 242 can generate an error signal based on the sampling signal and the reference voltage, and generate a compensation signal based on the error signal, wherein the reference voltage can be determined based on the target power supply voltage required by the load 300. Further, the reference voltage can be determined based on the target power supply voltage, the resistance value of the first voltage-dividing resistor R1, and the resistance value of the second voltage-dividing resistor R2, that is, the reference voltage can be the voltage obtained after dividing the target power supply voltage.

[0099] The compensation signal can be used to reflect the error between the sampling signal and the reference voltage, that is, the compensation signal can be used to reflect the error between the second power supply voltage output by the boost circuit 220 and the target power supply voltage required by the load 300. The driving unit 244 can adjust the target duty cycle according to the compensation signal output by the compensation unit 242, and generate a driving signal for the switch unit 2222 based on the adjusted target duty cycle, thereby adjusting the switch unit 2222 to be in the first conduction state in the first time period in the target cycle, and in the second conduction state in the second time period. Further, the driving unit 244 can generate driving signals corresponding to the first switch Q3, the second switch Q4 and the third switch Q5 in the switch unit 2222 respectively based on the adjusted target duty cycle.

[0100] Exemplarily, the compensation unit 242 may include but is not limited to a comparator, an error amplifier, etc. By adopting a closed-loop loop compensation method, a feedback can be formed from the second power supply voltage output by the boost circuit 220 to the driving signal input of the switch unit 2222 of the boost circuit 220, forming a closed-loop control method, which can improve the accuracy of the target duty cycle adjustment, thereby ensuring that the second power supply voltage output by the boost circuit 220 can meet the working requirements of the load 300.

[0101] In the embodiment of the present application, a closed-loop control method can be adopted to adjust the target duty cycle corresponding to the drive signal input to the switch unit 2222 according to the second power supply voltage output by the boost circuit 220, thereby achieving accurate control of the switch unit 2222 in the boost circuit 220, further improving the accuracy of controlling the adjustment unit 222 of the boost circuit 220 to switch between different working states, and ensuring that the second power supply voltage output by the boost circuit 220 can meet the working requirements of the load 300.

[0102] In some embodiments, the first time period of the target cycle may be greater than or equal to a preset minimum time period.

[0103] A minimum time period corresponding to the first time period may be preset, and the minimum time period may refer to a preset shortest duration within the target cycle during which the adjustment unit 222 is allowed to be in the first working state.

[0104] When the boost circuit 220 is operating stably, the second power supply voltage output by the boost circuit 220 can be stably equal to the target power supply voltage required by the load 300. However, in some cases, if the load suddenly increases, it will cause a large voltage drop in the internal resistance of the battery 210. Therefore, the first power supply voltage output by the battery 210 is very low at this time. Even if the control module 240 sets the target duty cycle to close to 0, it may not be possible to make the second power supply voltage output by the boost circuit 220 reach the target power supply voltage required by the load 300.

[0105] Therefore, a minimum duty cycle can be pre-set. In the case where the first supply voltage output by the battery 210 is very low, the control module 240 can set the target duty cycle to the minimum duty cycle, and generate a drive signal for the switch unit 2222 based on the minimum duty cycle. For example, the minimum duty cycle can be 0.1, 0.2, etc., but is not limited thereto. The minimum duty cycle can match a preset minimum time period, so that the switch unit 2222 switches the conduction state according to the minimum duty cycle. In this state, the target duty cycle corresponding to the drive signal of the switch unit 2222 is not strictly adjusted in a closed-loop control manner, but an open-loop control manner is adopted to fix the target duty cycle corresponding to the drive signal of the switch unit 2222 at the minimum duty cycle, so that the normal operation of the boost circuit 220 can be ensured.

[0106] Optionally, the control module 240 reduces the target duty cycle according to the sampling signal and the target power supply voltage. If it is detected that the reduced target duty cycle is less than or equal to the minimum duty cycle, the drive signal of the switch unit 2222 can be directly generated based on the minimum duty cycle. When the first power supply voltage output by the battery 210 increases, the second power supply voltage output by the boost circuit 220 increases, and the second power supply voltage output by the boost circuit 220 can be maintained at the target power supply voltage required by the load 300 in a closed-loop control manner.

[0107] In an embodiment of the present application, the first time period of the target cycle is greater than or equal to a preset minimum time period, and a minimum duty cycle corresponding to the target duty cycle can be pre-set, thereby avoiding the situation where the first power supply voltage output by the battery 210 is very low and the target duty cycle is reduced without limit, causing the boost circuit 220 to fail. This ensures that the boost circuit 220 can operate normally even when the first power supply voltage output by the battery 210 is very low, thereby improving circuit stability.

[0108] In some embodiments, the first time period and the second time period of the target cycle are determined according to the boost ratio corresponding to the boost circuit 220 .

[0109] The boost ratio corresponding to the boost circuit 220 may characterize the relationship between the output voltage and the input voltage of the boost circuit 220, and may be the ratio of the output voltage to the input voltage of the boost circuit 220, or the ratio of the input voltage to the output voltage of the boost circuit 220. For example, the boost ratio corresponding to the boost circuit 220 is 1:2, indicating that the ratio between the input voltage and the output voltage of the boost circuit 220 is 1:2, indicating that the output voltage of the boost circuit 220 is twice the input voltage, that is, the second power supply voltage output by the boost circuit 220 is twice the first power supply voltage input. For another example, the boost ratio corresponding to the boost circuit 220 is 1.5, indicating that the ratio between the output voltage and the input voltage of the boost circuit 220 is 1.5:1, indicating that the output voltage of the boost circuit 220 is 1.5 times the input voltage, that is, the second power supply voltage output by the boost circuit 220 is 1.5 times the first power supply voltage input.

[0110] Since the second power supply voltage output by the boost circuit 220 may be equal to the target difference multiplied by the first power supply voltage output by the battery 210, the target difference may be N minus the target duty cycle, such as the second power supply voltage Vsys=Vin*(2-D), therefore, Vsys / Vin=2-D, assuming that the boost ratio corresponding to the boost circuit 220 is the ratio between the output voltage and the input voltage of the boost circuit 220, then the boost ratio=2-D (i.e., the target difference). Therefore, when the boost ratio required by the boost circuit 220 is determined, the boost circuit 220 may be controlled to perform boosting according to the required boost ratio by adjusting the target duty cycle, that is, the boost circuit 220 may be controlled to perform boosting according to the required boost ratio by adjusting the first time period and the second time period of the target cycle.

[0111] Optionally, an open-loop control method may be used to adjust the first time period and the second time period of the target cycle. The control module 240 may obtain the boost ratio required by the boost circuit 220. For example, the control module 240 may receive the boost ratio required by the boost circuit 220 sent by the processor through a communication method such as I2C. The control module 240 may determine the target duty cycle according to the boost ratio required by the boost circuit 220, and generate a drive signal for the switch unit 2222 based on the target duty cycle to adjust the first time period and the second time period of the target cycle, thereby controlling the boost circuit 220 to boost the first supply voltage output by the battery 210 according to the boost ratio.

[0112] For example, if the boost ratio required by the boost circuit 220 is 1.5, that is, the output voltage of the boost circuit 220 is 1.5 times the input voltage, the target duty cycle can be set to 0.5, that is, the first time period and the second time period of the target cycle each occupy half the duration, so that the boost circuit 220 can boost the first supply voltage output by the battery 210 at a boost ratio of 1.5. When the boost ratio required by the boost circuit 220 remains unchanged, the target duty cycle can be fixed, realizing a mode in which the boost circuit 220 performs a boost at a fixed boost ratio.

[0113] In the embodiment of the present application, the target duty cycle of the switch unit 2222 can be adjusted according to the boost ratio required by the boost circuit 220, thereby adjusting the first time period and the second time period of the target cycle. When the boost ratio of the boost circuit 220 needs to be adjusted, it can be achieved by adjusting the target duty cycle of the switch unit 2222, thereby improving the flexibility and accuracy of the boost ratio control of the boost circuit 220.

[0114] like Fig.10 As shown, in one embodiment, the voltage conversion circuit 200 may further include a bypass switch QP, which may be connected to the battery 210 and the load 300 respectively, and the bypass switch QP may be connected in parallel with the boost circuit 220.

[0115] The bypass switch QP is used to be in a conducting state when the first supply voltage output by the battery 210 is greater than or equal to the target voltage threshold, and the boost circuit 220 does not work, so as to use the first supply voltage output by the battery 210 to power the load 300.

[0116] The bypass switch QP is also used to be in a disconnected state when the first supply voltage output by the battery 210 is less than the target voltage threshold, so as to boost the first supply voltage output by the battery through the boost circuit 220 .

[0117] The target voltage threshold may be greater than or equal to the target supply voltage required by the load 300 . For example, the target voltage threshold may be 3V, 3.1V, etc., but is not limited thereto.

[0118] When the first supply voltage output by the battery 210 is greater than or equal to the target voltage threshold, it means that the first supply voltage output by the battery 210 meets the working requirements of the load 300 and can ensure the normal operation of the load 300. Therefore, the bypass switch QP can be turned on, and the output end (i.e., the positive end) of the battery 210 and the load 300 can form a through channel, and the first supply voltage output by the battery 210 supplies power to the load 300 through the through channel. Further, when the first supply voltage output by the battery 210 is greater than or equal to the target voltage threshold, the boost circuit 220 does not work, and the first switch Q3, the second switch Q4, and the third switch Q5 in the boost circuit 220 can all be in a disconnected state.

[0119] When the first supply voltage output by the battery 210 is less than the target voltage threshold, it means that the first supply voltage output by the battery 210 may not be able to meet the working requirements of the load 300. In this case, the bypass switch QP can be disconnected, and the boost circuit 220 is in working state. The first supply voltage output by the battery 210 can be boosted by the boost circuit 220 to obtain a second supply voltage, and then supply power to the load 300 to ensure that when the first supply voltage output by the battery 210 is low, the load 300 can also work normally, thereby adapting to the application of batteries with a small minimum discharge voltage such as silicon negative electrode batteries in electronic devices.

[0120] In some embodiments, the voltage conversion circuit 200 may further include a battery sampling unit, which may be used to sample the first supply voltage output by the battery 210 to obtain a sampling result. The control module 240 may determine whether the first supply voltage output by the battery 210 is less than the target voltage threshold value based on the sampling result and the target voltage threshold value. If the first supply voltage output by the battery 210 is greater than or equal to the target voltage threshold value, the control module 240 may control the bypass switch QP to be turned on; if it is detected that the first supply voltage output by the battery 210 is less than the target voltage threshold value, the control module 240 may control the bypass switch QP to be turned off.

[0121] It should be noted that the implementation method of the control module 240 determining whether the first supply voltage output by the battery 210 is less than the target voltage threshold based on the sampling results and the target voltage threshold may be similar to the method described in the above embodiment in which the control module 240 determines whether the second supply voltage output by the boost circuit 220 reaches the target supply voltage. The determination may be made by a digital circuit or an analog circuit, which will not be repeated here.

[0122] In the embodiment of the present application, the bypass switch QP can be controlled to be turned on or off according to the relationship between the first power supply voltage output by the battery 210 and the target voltage threshold, so that when the first power supply voltage output by the battery 210 is relatively large, the first power supply voltage output by the battery 210 is directly used to power the load 300. When the first power supply voltage output by the battery 210 is relatively small, the first power supply voltage output by the battery 210 is boosted by the boost circuit 220 before powering the load 300, thereby improving the flexibility of circuit control and meeting the normal working requirements of the load 300.

[0123] It should be noted that the switches such as the first switch Q3, the second switch Q4, the third switch Q5 and the bypass switch QP involved in the above embodiments may include but are not limited to one or more of MOS tubes (Metal-Oxide-Semiconductor Field-Effect Transistor), GaN (Gallium Nitride) switches, SiC (Silicon Carbide) switches, etc.

[0124] In some embodiments, in order to improve the output power of the boost circuit 220, the voltage conversion circuit 200 may include a multi-phase boost circuit 220, and the boost circuits 220 of two adjacent phases work at a target phase interval. The multi-phase boost circuits 220 may be connected in parallel and work in an interleaved manner, and the boost circuits 220 of two adjacent phases work at a target phase interval.

[0125] Optionally, the target phase may be a preset fixed phase, or may be determined according to the number of phases of the boost circuit 220. For example, the target phase may be equal to 360° divided by the number of phases of the boost circuit 220. For example, if the number of phases of the boost circuit 220 is 2, the target phase may be 180°; if the number of phases of the boost circuit 220 is 3, the target phase may be 120°, etc., but the present invention is not limited thereto.

[0126] For example, Fig.11 As shown, the voltage conversion circuit 200 may include a two-phase boost circuit 220, which may be connected in parallel, wherein the boost circuit of the first phase may include an inductor L2, a first switch Q3, a second switch Q4, a third switch Q5 and a first capacitor C1, and the boost circuit of the second phase may include an inductor L3, a switch Q6, a switch Q7, a switch Q8 and a second capacitor C2. The structural topology of the boost circuit of the second phase is the same as that of the boost circuit of the first phase, and will not be repeated here.

[0127] The two-phase boost circuit can work with a phase shift of 180°. Furthermore, the turn-on and turn-off time points of the first switch Q3, the second switch Q4, and the third switch Q5 can be respectively shifted by 180° from the switch Q6, the switch Q7, and the switch Q8. The two-phase boost circuit 220 can work with a phase shift of 180°. The two-phase boost circuit 220 can work with a phase shift of half a target cycle, that is, the turn-on and turn-off time points of the first switch Q3 and the turn-on and turn-off time points of the switch Q6 are shifted by half a target cycle, the turn-on and turn-off time points of the second switch Q4 and the turn-on and turn-off time points of the switch Q7 are shifted by half a target cycle, and the turn-on and turn-off time points of the third switch Q5 and the turn-on and turn-off time points of the switch Q8 are shifted by half a target cycle.

[0128] For example, Fig.12 FIG. 1 is a schematic diagram of the operation of switches in a two-phase boost circuit in one embodiment. Fig.12 For example, Fig.12 (1) is a schematic diagram of the PWM signal of the first switch Q3, Fig.12 (2) is a schematic diagram of the PWM signal of the switch Q6. Taking the target duty cycle as 0.5 as an example, the turn-on and turn-off time points of the first switch Q3 and the turn-on and turn-off time points of the switch Q6 are staggered by half a target period T.

[0129] In some embodiments, the voltage conversion circuit 200 may include a coupled inductor, which may include a first coil and a second coil, and the inductors 224 included in the boost circuit 220 of two adjacent phases are the first coil and the second coil, respectively. The two inductors 224 included in the boost circuit 220 of two adjacent phases may be integrated into a coupled inductor.

[0130] For example, Fig.13 As shown, the voltage conversion circuit 200 may include a two-phase boost circuit 220, which may be connected in parallel, wherein the boost circuit of the first phase may include a first switch Q3, a second switch Q4, a third switch Q5 and a first capacitor C1, and the boost circuit of the second phase may include a switch Q6, a switch Q7, a switch Q8 and a second capacitor C2. The voltage conversion circuit 200 may include a coupled inductor L, wherein the boost circuit of the first phase includes a first coil L' of the coupled inductor L, and the boost circuit of the second phase includes a second coil L", of the coupled inductor L, wherein the first coil L' of the coupled inductor L serves as the above-mentioned inductor L2 in the boost circuit of the first phase, and the second coil L" of the coupled inductor L serves as the above-mentioned inductor L3 in the boost circuit of the second phase. Replacing two independent inductors in the boost circuit 220 of two adjacent phases with a coupled inductor can offset the DC bias magnetism, thereby improving the efficiency of the boost circuit 220. The size of the coupled inductor is much smaller than the sum of the sizes of the two independent inductors, so the volume occupied by the inductor in the boost circuit 220 can be further reduced.

[0131] In an embodiment of the present application, the voltage conversion circuit 200 may include a multi-phase boost circuit 220, and the boost circuits 220 of two adjacent phases operate with a target phase interval, which can improve the output power of the boost circuit 220 and achieve the effect of reducing the output current and voltage ripple.

[0132] like Fig.14 As shown, in one embodiment, a chip 1400 is provided. The chip 1400 may include the voltage conversion circuit 200 described in any of the above embodiments.

[0133] In some embodiments, an electronic device is provided. The electronic device may include the voltage conversion circuit 200 described in any of the above embodiments, or may include the chip 1400 described in the above embodiments.

[0134] Optionally, the electronic devices may include but are not limited to mobile phones, wearable devices (such as smart glasses, smart watches, etc.), tablet computers, vehicle-mounted terminals, laptops, PCs (Personal Computers), smart home devices, etc.

[0135] like Fig.15 As shown, in one embodiment, a voltage conversion method is provided, which can be applied to the above-mentioned voltage conversion circuit 200, or can be applied to the above-mentioned chip 1400, or can be applied to the above-mentioned electronic device. The voltage conversion method may include the following steps:

[0136] Step 1510, boosting the first supply voltage output by the battery through a boost circuit to obtain a second supply voltage, and the second supply voltage is used to power the load; the boost circuit includes an adjustment unit and an inductor, the adjustment unit is connected to the battery, the first end of the inductor is connected to the adjustment unit, and the second end of the inductor is connected to the load.

[0137] Step 1520: adjust the voltage at the first end of the inductor by means of an adjustment unit so that the voltage at the first end of the inductor is greater than or equal to the first supply voltage.

[0138] In some embodiments, step 1520 includes: adjusting the voltage of the first end of the inductor by the adjusting unit so that the voltage of the first end of the inductor varies between the first supply voltage and N times the first supply voltage, where N is an integer greater than 1.

[0139] In some embodiments, the step of adjusting the voltage at the first end of the inductor by the adjustment unit so that the voltage at the first end of the inductor varies between a first supply voltage and N times the first supply voltage includes: controlling the adjustment unit to be in a first working state during a first time period of a target cycle so that the voltage at the first end of the inductor is equal to the first supply voltage; controlling the adjustment unit to be in a second working state during a second time period of the target cycle so that the voltage at the first end of the inductor is less than or equal to N times the first supply voltage; wherein the target cycle is equal to the sum of the first time period and the second time period.

[0140] In some embodiments, the regulating unit includes a switch unit and a first capacitor, and the switch unit is respectively connected to the battery, the first end of the inductor, and the first capacitor;

[0141] The step of controlling the regulating unit to be in a first working state within a first time period of a target cycle so that the voltage at the first end of the inductor is equal to the first supply voltage includes:

[0142] Controlling the switch unit to be in a first conduction state in a first time period of a target cycle, so that the first capacitor stores electrical energy and the voltage at the first end of the inductor is equal to the first supply voltage;

[0143] The step of controlling the regulating unit to be in a second working state within a second time period of the target cycle so that the voltage at the first end of the inductor is less than or equal to N times the first supply voltage includes:

[0144] The switch unit is controlled to be in a second conduction state within a second time period of the target cycle, so that the first capacitor releases electrical energy and a voltage at the first end of the inductor is less than or equal to twice the first supply voltage.

[0145] In some embodiments, the switch unit includes a first switch, a second switch, and a third switch, the first switch, the second switch, and the third switch are connected in series, a connection midpoint between the first switch and the second switch is connected to a battery, and a connection midpoint between the second switch and the third switch is connected to a first end of a first capacitor; the first switch is also connected to a first end of an inductor and a second end of the first capacitor, respectively;

[0146] The step of controlling the switch unit to be in a first conduction state in a first time period of a target cycle includes: controlling the first switch and the third switch to be turned on, and controlling the second switch to be turned off;

[0147] The step of controlling the switch unit to be in a second conduction state within a second time period of the target cycle includes: controlling the first switch and the third switch to be turned off, and controlling the second switch to be turned on.

[0148] In some embodiments, the above method further includes: adjusting the first time period and the second time period of the target cycle according to the second supply voltage output by the boost circuit and the target supply voltage required by the load.

[0149] In some embodiments, the voltage conversion circuit also includes a sampling module; the step of adjusting the first time period and the second time period of the target cycle according to the second power supply voltage output by the boost circuit and the target power supply voltage required by the load includes: sampling the second power supply voltage output by the boost circuit through the sampling module to obtain a sampling signal; adjusting the first time period and the second time period of the target cycle according to the sampling module and the target power supply voltage.

[0150] In some embodiments, the above method further includes: determining a first time period and a second time period of the target cycle according to a boost ratio corresponding to the boost circuit.

[0151] In some embodiments, the voltage conversion circuit further includes a bypass switch, the bypass switch is connected to the battery and the load respectively, and the bypass switch is connected in parallel with the boost circuit; the method further includes:

[0152] When the first supply voltage output by the battery is greater than or equal to the target voltage threshold, the bypass switch is controlled to be in an on state, and the boost circuit is controlled not to work, so as to use the first supply voltage output by the battery to supply power to the load;

[0153] The step of boosting the first supply voltage output by the battery through a boost circuit to obtain a second supply voltage includes:

[0154] When the first supply voltage output by the battery is less than the target voltage threshold, the bypass switch is controlled to be in an off state, and the first supply voltage output by the battery is boosted by the boost circuit to obtain a second supply voltage.

[0155] It should be noted that the description of the voltage conversion method provided in the embodiment of the present application can refer to the relevant description of the voltage conversion circuit 200 provided in the above embodiments, and will not be repeated here.

[0156] In an embodiment of the present application, the voltage at the first end of the inductor is changed by an adjustment unit in the boost circuit so that the voltage at the first end of the inductor is greater than or equal to the first supply voltage output by the battery. When the output power of the boost circuit remains unchanged, the voltage at the first end of the inductor (which can be understood as the input end of the inductor) increases, which can reduce the inductor current input to the inductor, thereby significantly reducing the volume of the inductor, reducing the area of ​​the boost circuit on the circuit board and reducing the cost.

[0157] An embodiment of the present application discloses an electronic device, including a memory and a processor. A computer program is stored in the memory. When the computer program is executed by the processor, the electronic device implements the methods described in the above embodiments.

[0158] An embodiment of the present application discloses a computer-readable storage medium storing a computer program, wherein the computer program implements the methods described in the above embodiments when executed by a processor.

[0159] The embodiments of the present application disclose a computer program product, including a computer program, and the computer program can be executed by a processor to implement the methods described in the above embodiments.

[0160] 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, "in one embodiment" or "in an embodiment" appearing throughout the specification does 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 be aware that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily required for the present application.

[0161] In the various embodiments of the present application, it should be understood that the size of the serial numbers of the above-mentioned processes does not necessarily mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0162] The units described above as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0163] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0164] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0165] The above is a detailed introduction to a voltage conversion circuit, chip, electronic device and voltage conversion method disclosed in the embodiments of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for those of ordinary skill in the art, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as limiting the present application.

Claims

1. A voltage conversion circuit, characterized in that: include: A battery, configured to output a first supply voltage; a boost circuit, used for boosting the first supply voltage to obtain a second supply voltage, wherein the second supply voltage is used to supply power to a load; The boost circuit includes an adjustment unit and an inductor, wherein the adjustment unit is connected to the battery, a first end of the inductor is connected to the adjustment unit, and a second end of the inductor is connected to the load; The regulating unit is used to regulate the voltage at the first end of the inductor so that the voltage at the first end of the inductor is greater than or equal to the first supply voltage.

2. The voltage conversion circuit according to claim 1, characterized in that: The regulating unit is further used to regulate the voltage at the first end of the inductor so that the voltage at the first end of the inductor varies between the first supply voltage and N times the first supply voltage, where N is an integer greater than 1.

3. The voltage conversion circuit according to claim 2, characterized in that: The regulating unit is further configured to be in a first working state in a first time period of a target cycle so that a voltage at the first end of the inductor is equal to the first supply voltage; and to be in a second working state in a second time period of the target cycle so that a voltage at the first end of the inductor is less than or equal to N times the first supply voltage; The target period is equal to the sum of the first time period and the second time period.

4. The voltage conversion circuit according to claim 3, characterized in that: The regulating unit comprises a switch unit and a first capacitor, wherein the switch unit is respectively connected to the battery, the first end of the inductor and the first capacitor; The switch unit is configured to be in a first conduction state during a first time period of the target cycle, so that the first capacitor stores electrical energy and the voltage at the first end of the inductor is equal to the first supply voltage; The switch unit is further configured to be in a second conduction state during a second time period of the target cycle, so that the first capacitor releases electrical energy, and a voltage at the first end of the inductor is less than or equal to twice the first supply voltage.

5. The voltage conversion circuit according to claim 4, characterized in that: The switch unit includes a first switch, a second switch and a third switch, the first switch, the second switch and the third switch are connected in series, a connection midpoint between the first switch and the second switch is connected to the battery, and a connection midpoint between the second switch and the third switch is connected to the first end of the first capacitor; the first switch is also connected to the first end of the inductor and the second end of the first capacitor respectively.

6. The voltage conversion circuit according to claim 5, characterized in that: The first conduction state includes: the first switch and the third switch are turned on, and the second switch is turned off; The second conducting state includes: the first switch and the third switch are turned off, and the second switch is turned on.

7. The voltage conversion circuit according to any one of claims 3 to 6, characterized in that: The first time period and the second time period of the target cycle are determined according to the target supply voltage required by the load.

8. The voltage conversion circuit according to claim 7, characterized in that: The voltage conversion circuit also includes a sampling module and a control module; The sampling module is used to sample the second supply voltage output by the boost circuit to obtain a sampling signal; The control module is used to adjust the first time period and the second time period of the target cycle according to the sampling signal and the target supply voltage.

9. The voltage conversion circuit according to any one of claims 3 to 6, characterized in that: The first time period and the second time period of the target cycle are determined according to the boost ratio corresponding to the boost circuit.

10. The voltage conversion circuit according to any one of claims 3 to 6, characterized in that: The first time period of the target cycle is greater than or equal to a preset minimum time period.

11. The voltage conversion circuit according to any one of claims 3 to 6, characterized in that: The second supply voltage output by the boost circuit is equal to the target difference multiplied by the first supply voltage output by the battery, the target difference is N minus a target duty cycle, and the target duty cycle matches the first time period.

12. The voltage conversion circuit according to any one of claims 1 to 6, characterized in that: The voltage conversion circuit further includes a bypass switch, the bypass switch is connected to the battery and the load respectively, and the bypass switch is connected in parallel with the boost circuit; The bypass switch is used to be in a conducting state when the first supply voltage output by the battery is greater than or equal to a target voltage threshold, and the boost circuit does not work, so as to use the first supply voltage output by the battery to power the load; The bypass switch is further configured to be in a disconnected state when the first supply voltage output by the battery is less than the target voltage threshold, so as to boost the first supply voltage output by the battery through the boost circuit.

13. The voltage conversion circuit according to claim 1, characterized in that: The voltage conversion circuit includes a multi-phase boost circuit, and the boost circuits of two adjacent phases operate with a target phase interval between them.

14. The voltage conversion circuit according to claim 13, characterized in that: The voltage conversion circuit includes a coupled inductor, and the coupled inductor includes a first coil and a second coil. The inductors included in the boost circuits of the adjacent two phases are the first coil and the second coil, respectively.

15. A chip, characterized in that: It comprises the voltage conversion circuit as claimed in any one of claims 1 to 14.

16. An electronic device, characterized in that: It comprises the voltage conversion circuit as claimed in any one of claims 1 to 14, or comprises the chip as claimed in claim 15.

17. A voltage conversion method, characterized in that: include: Boosting a first supply voltage output by a battery by a boost circuit to obtain a second supply voltage, wherein the second supply voltage is used to supply power to a load; The boost circuit includes an adjustment unit and an inductor, wherein the adjustment unit is connected to the battery, a first end of the inductor is connected to the adjustment unit, and a second end of the inductor is connected to the load; The voltage at the first end of the inductor is adjusted by the adjustment unit so that the voltage at the first end of the inductor is greater than or equal to the first supply voltage.

18. The method according to claim 17, characterized in that The step of adjusting the voltage at the first end of the inductor by the adjusting unit so that the voltage at the first end of the inductor is greater than or equal to the first supply voltage includes: The voltage at the first end of the inductor is adjusted by the adjustment unit so that the voltage at the first end of the inductor varies between the first supply voltage and N times the first supply voltage, where N is an integer greater than 1.

19. The method according to claim 18, characterized in that The step of adjusting the voltage at the first end of the inductor by the adjusting unit so that the voltage at the first end of the inductor changes between the first supply voltage and N times the first supply voltage comprises: Controlling the regulating unit to be in a first working state within a first time period of a target cycle so that the voltage at the first end of the inductor is equal to the first supply voltage; Controlling the regulating unit to be in a second working state during a second time period of the target cycle, so that the voltage at the first end of the inductor is less than or equal to the N times first supply voltage; The target period is equal to the sum of the first time period and the second time period.

20. The method according to claim 19, characterized in that The regulating unit comprises a switch unit and a first capacitor, wherein the switch unit is respectively connected to the battery, the first end of the inductor and the first capacitor; The step of controlling the regulating unit to be in a first working state within a first time period of a target cycle so that a voltage at a first end of the inductor is equal to the first supply voltage includes: Controlling the switch unit to be in a first conducting state during a first time period of the target cycle, so that the first capacitor stores electrical energy and the voltage at the first end of the inductor is equal to the first supply voltage; The controlling the regulating unit to be in a second working state within a second time period of the target cycle so that the voltage at the first end of the inductor is equal to the N times first supply voltage includes: The switch unit is controlled to be in a second conduction state during a second time period of the target cycle, so that the first capacitor releases electric energy and a voltage at the first end of the inductor is less than or equal to twice the first supply voltage.

21. The method according to claim 20, characterized in that The switch unit comprises a first switch, a second switch and a third switch, wherein the first switch, the second switch and the third switch are connected in series, a connection midpoint between the first switch and the second switch is connected to the battery, and a connection midpoint between the second switch and the third switch is connected to the first end of the first capacitor; the first switch is also connected to the first end of the inductor and the second end of the first capacitor respectively; The controlling the switch unit to be in a first conducting state within a first time period of the target cycle includes: Controlling the first switch and the third switch to be turned on, and controlling the second switch to be turned off; The controlling the switch unit to be in a second conduction state within a second time period of the target cycle includes: The first switch and the third switch are controlled to be turned off, and the second switch is controlled to be turned on.

22. The method according to any one of claims 19 to 21, characterized in that: The method further comprises: The first time period and the second time period of the target cycle are adjusted according to the second power supply voltage output by the boost circuit and the target power supply voltage required by the load.

23. The method according to any one of claims 17 to 21, characterized in that: The method further comprises: When the first supply voltage output by the battery is greater than or equal to the target voltage threshold, the bypass switch is controlled to be in an on state, and the boost circuit is controlled not to work, so as to use the first supply voltage output by the battery to supply power to the load; the bypass switch is connected to the battery and the load respectively, and the bypass switch is connected in parallel with the boost circuit; The step of boosting the first supply voltage output by the battery through a boost circuit to obtain a second supply voltage includes: When the first supply voltage output by the battery is less than the target voltage threshold, the bypass switch is controlled to be in an off state, and the first supply voltage output by the battery is boosted by a boost circuit to obtain a second supply voltage.

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