Power supply circuit, chip and electronic equipment

Abstract

The invention relates to the technical field of electronic circuits, and discloses a power supply circuit, a chip and electronic equipment. The output end of the power supply circuit is connected with the input end of a load circuit, and the power supply circuit comprises a control module, a combined switch module and an adjusting module. Wherein the control module is used for outputting a switch control signal to the combined switch module; the combined switch module is used for switching to a corresponding target switch mode according to different switch control signals; and the adjusting module is used for correspondingly adjusting the input voltage of the power supply circuit according to the target switching mode, so that mode switching of boosting the input voltage of the power supply circuit by different multiples can be realized, and the boosting efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of electronic circuit technology, and in particular to a power supply circuit, a chip, and an electronic device. Background Technology

[0002] Electronic devices such as mobile phones, computers, or game controllers are usually equipped with power circuits for controlling power supply voltage. Through the power circuit, the power supply voltage can be increased (hereinafter referred to as boost), such as boosting by 1.5 times (1.5 times mode), 2 times (2 times mode), or 3 times (3 times mode), etc.

[0003] However, even in 3x mode, the power supply's output voltage is still relatively low (e.g., around 6.3~12.6V), which cannot meet the needs of applications requiring higher voltages. Furthermore, the higher the boost factor, the more power switching transistors are typically configured in the power supply circuit, leading to complex switching control timing. Moreover, high-multiplier boost requires multi-phase control, affecting the output drive capability. Summary of the Invention

[0004] To address the aforementioned technical problems, embodiments of this application provide a power supply circuit, a chip, and an electronic device.

[0005] In a first aspect, embodiments of this application provide a power supply circuit, the output terminal of which is connected to the input terminal of a load circuit. The power supply circuit includes a control module, a combination switch module, and an adjustment module. The control module is connected to the combination switch module and is used to output a switch control signal to the combination switch module. The combination switch module is connected to the adjustment module and is used to switch to a corresponding target switch mode according to different switch control signals. The adjustment module is used to adjust the input voltage of the power supply circuit according to the target switch mode and discharge to the output terminal of the power supply circuit based on the adjusted voltage, so that the output voltage of the power supply circuit is greater than or equal to the input voltage of the power supply circuit. When the combination switch module is in different target switch modes, the output voltage of the power supply circuit is a different multiple of the input voltage of the power supply circuit, with the different multiples including at least 4 times.

[0006] It is understood that the power supply circuit in this embodiment controls different switch control signals through the control module, controlling the combined switch module to be in different target switching modes. The adjustment module then adjusts the input voltage of the power supply circuit accordingly based on the different target switching modes, achieving mode switching for boosting the input voltage of the power supply circuit by different factors, thereby improving boost efficiency. Furthermore, by using the two phases of charging and discharging, the input voltage can be boosted to four times, that is, a 4x boost is achieved.

[0007] In some possible embodiments of the first aspect described above, the adjustment module is used to switch the charging state or the discharging state according to the target switching mode so as to adjust the output voltage of the power supply circuit accordingly. The adjustment module includes a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, and a fifth capacitor.

[0008] In some possible embodiments of the first aspect described above, the first capacitor, the second capacitor, the third capacitor, the fourth capacitor, and the fifth capacitor are integrated within the power supply circuit; or, the first capacitor, the second capacitor, the third capacitor, the fourth capacitor, and the fifth capacitor are external to the power supply circuit.

[0009] In some possible embodiments of the first aspect described above, the adjustment module further includes a sixth capacitor and a seventh capacitor, wherein the first terminal of the sixth capacitor is connected to the input terminal of the power supply circuit and the second terminal of the sixth capacitor is grounded; the first terminal of the seventh capacitor is connected to the output terminal of the power supply circuit and the second terminal of the seventh capacitor is grounded.

[0010] In some possible embodiments of the first aspect described above, the combined switch module includes a first power switch, a second power switch, a third power switch, a fourth power switch, a fifth power switch, a sixth power switch, a seventh power switch, and an eighth power switch. The first terminal of the first power switch is connected to the input terminal of the power supply circuit, and the second terminal of the first power switch is connected to the first terminal of a first capacitor. The first terminal of the second power switch is connected to the second terminals of the first, third, and fifth capacitors, and the second terminal of the second power switch is grounded. The first terminal of the third power switch is connected to the first terminal of the second capacitor, the second terminal of the second capacitor is connected to the output terminal of the power supply circuit, and the second terminal of the third power switch is connected to the first terminal of the third capacitor. The fourth power switch... The first terminal of the switching transistor is connected to the input terminal of the power supply circuit; the second terminal of the fourth power switching transistor is connected to the first terminal of the second power switching transistor; the first terminal of the fifth power switching transistor is connected to the second terminal of the first power switching transistor, and the second terminal of the fifth power switching transistor is connected to the first terminal of the third power switching transistor; the first terminal of the sixth power switching transistor is connected to the second terminal of the third power switching transistor, and the second terminal of the sixth power switching transistor is connected to the first terminal of the fourth capacitor, and the second terminal of the fourth capacitor is connected to the output terminal of the power supply circuit; the first terminal of the seventh power switching transistor is connected to the second terminal of the sixth power switching transistor, and the second terminal of the seventh power switching transistor is connected to the first terminal of the fifth capacitor; the first terminal of the eighth power switching transistor is connected to the second terminal of the seventh power switching transistor, and the second terminal of the eighth power switching transistor is connected to the output terminal of the power supply circuit.

[0011] In some possible embodiments of the first aspect described above, the voltage variation range of each of the first, second, third, fourth, fifth, sixth, seventh, and eighth power switches is less than or equal to the input voltage of the power supply circuit.

[0012] In some possible embodiments of the first aspect described above, the combined switch module includes a first power switch, a second power switch, a third power switch, a fourth power switch, a fifth power switch, a sixth power switch, a seventh power switch, an eighth power switch, and a ninth power switch. The first terminal of the first power switch is connected to the input terminal of the power supply circuit, and the second terminal of the first power switch is connected to the first terminal of a first capacitor. The first terminal of the second power switch is connected to the second terminals of the first, third, and fifth capacitors, and the second terminal of the second power switch is grounded. The first terminal of the third power switch is connected to the first terminal of the second capacitor, the second terminal of the second capacitor is connected to the output terminal of the power supply circuit, and the second terminal of the third power switch is connected to the first terminal of the third capacitor. The first terminal of the fourth power switch is connected to the input terminal of the power supply circuit. The second terminal of the fourth power switch is connected to the first terminal of the second power switch; the first terminal of the fifth power switch is connected to the second terminal of the first power switch, and the second terminal of the fifth power switch is connected to the first terminal of the third power switch; the first terminal of the sixth power switch is connected to the second terminal of the third power switch, and the second terminal of the sixth power switch is connected to the first terminal of the fourth capacitor, and the second terminal of the fourth capacitor is connected to the output terminal of the power supply circuit; the first terminal of the seventh power switch is connected to the second terminal of the sixth power switch, and the second terminal of the seventh power switch is connected to the first terminal of the fifth capacitor; the first terminal of the eighth power switch is connected to the second terminal of the seventh power switch, and the second terminal of the eighth power switch is connected to the output terminal of the power supply circuit; the first terminal of the ninth power switch is connected to the input terminal of the power supply circuit, and the second terminal of the ninth power switch is connected to the second terminal of the seventh power switch.

[0013] In some possible embodiments of the first aspect described above, the voltage variation range of each of the first, second, third, fourth, fifth, sixth, seventh, and eighth power switches is less than or equal to the input voltage of the power supply circuit; the voltage variation range of the ninth power switch is greater than the input voltage of the power supply circuit.

[0014] In some possible embodiments of the first aspect described above, when the switch control signal is a first switch control signal, the target switch mode is a first mode; the combined switch module is used to alternately be in the charging phase and discharging phase of the first mode according to the first switch control signal, wherein when the combined switch module is in the charging phase of the first mode, the first capacitor, the third capacitor, and the fifth capacitor are in a charging state, and the second capacitor, the fourth capacitor, and the seventh capacitor are in a discharging state; when the combined switch module is in the discharging phase of the first mode, the first capacitor, the third capacitor, and the fifth capacitor are in a discharging state, and the second capacitor, the fourth capacitor, and the seventh capacitor are in a charging state; and the output voltage of the power supply circuit is four times the input voltage of the power supply circuit.

[0015] In some possible embodiments of the first aspect described above, when the combined switch module is in the charging phase of the first mode, the first power switch, the second power switch, the third power switch, and the seventh power switch are in the on state, and the fourth power switch, the fifth power switch, the sixth power switch, and the eighth power switch are in the off state; when the combined switch module is in the discharging phase of the first mode, the fourth power switch, the fifth power switch, the sixth power switch, and the eighth power switch are in the on state, and the first power switch, the second power switch, the third power switch, and the seventh power switch are in the off state.

[0016] In some possible embodiments of the first aspect described above, when the combined switch module is in the charging phase of the first mode, the first power switch, the second power switch, the third power switch, and the seventh power switch are in the on state, and the fourth power switch, the fifth power switch, the sixth power switch, the eighth power switch, and the ninth power switch are in the off state; when the combined switch module is in the discharging phase of the first mode, the fourth power switch, the fifth power switch, the sixth power switch, and the eighth power switch are in the on state, and the first power switch, the second power switch, the third power switch, the seventh power switch, and the ninth power switch are in the off state.

[0017] In some possible embodiments of the first aspect described above, when the switch control signal is the second switch control signal, the target switch mode is the second mode; the combined switch module is used to alternately be in the charging phase and discharging phase of the second mode according to the second switch control signal, wherein when the combined switch module is in the charging phase of the second mode, the first capacitor, the third capacitor, and the fifth capacitor are in the charging state, and the fourth capacitor and the seventh capacitor are in the discharging state; when the combined switch module is in the discharging phase of the second mode, the third capacitor and the fifth capacitor are in the discharging state, and the fourth capacitor and the seventh capacitor are in the charging state; and the output voltage of the power supply circuit is three times the input voltage of the power supply circuit.

[0018] In some possible embodiments of the first aspect described above, when the combined switch module is in the charging phase of the second mode, the first power switch, the second power switch, the third power switch, the fifth power switch, and the seventh power switch are in the on state, and the fourth power switch, the sixth power switch, and the eighth power switch are in the off state; when the combined switch module is in the discharging phase of the second mode, the fourth power switch, the sixth power switch, and the eighth power switch are in the on state, and the first power switch, the second power switch, the third power switch, the fifth power switch, and the seventh power switch are in the off state.

[0019] In some possible embodiments of the first aspect described above, when the combined switch module is in the charging phase of the second mode, the first power switch, the second power switch, the third power switch, the fifth power switch, and the seventh power switch are in the on state, and the fourth power switch, the sixth power switch, the eighth power switch, and the ninth power switch are in the off state; when the combined switch module is in the discharging phase of the second mode, the fourth power switch, the sixth power switch, and the eighth power switch are in the on state, and the first power switch, the second power switch, the third power switch, the fifth power switch, the seventh power switch, and the ninth power switch are in the off state.

[0020] In some possible embodiments of the first aspect described above, when the switch control signal is a third switch control signal, the target switch mode is the third mode; the combined switch module is used to alternately be in the charging phase and discharging phase of the third mode according to the third switch control signal, wherein when the combined switch module is in the charging phase of the third mode, the first capacitor, the third capacitor, and the fifth capacitor are in the charging state, and the seventh capacitor is in the discharging state; when the combined switch module is in the discharging phase of the third mode, the fifth capacitor is in the discharging state, and the seventh capacitor is in the charging state; and the output voltage of the power supply circuit is twice the input voltage of the power supply circuit.

[0021] In some possible embodiments of the first aspect described above, when the combined switch module is in the charging phase of the third mode, the first power switch, the second power switch, the third power switch, the fifth power switch, the sixth power switch, and the seventh power switch are in the on state, and the fourth power switch and the eighth power switch are in the off state; when the combined switch module is in the discharging phase of the third mode, the fourth power switch and the eighth power switch are in the on state, and the first power switch, the second power switch, the third power switch, the fifth power switch, the sixth power switch, and the seventh power switch are in the off state.

[0022] In some possible embodiments of the first aspect above, when the switch control signal is the fourth switch control signal, the target switch mode is the fourth mode; the combination switch module is used to be in the fourth mode according to the fourth switch control signal, wherein when the combination switch module is in the fourth mode, the first capacitor, the second capacitor, the third capacitor, the fourth capacitor and the fifth capacitor are disconnected, and the output voltage of the power supply circuit is 1 times the input voltage of the power supply circuit.

[0023] In some possible embodiments of the first aspect described above, when the combination switch module is in the fourth mode, the first power switch, the third power switch, the fifth power switch, the sixth power switch, the seventh power switch and the eighth power switch are in the on state, and the second power switch and the fourth power switch are in the off state.

[0024] In some possible embodiments of the first aspect described above, when the switch control signal is a third switch control signal, the target switch mode is the third mode; the combined switch module is used to alternately be in the charging phase and discharging phase of the third mode according to the third switch control signal, wherein when the combined switch module is in the charging phase of the third mode, the fifth capacitor is in the charging state and the seventh capacitor is in the discharging state; when the combined switch module is in the discharging phase of the third mode, the fifth capacitor is in the discharging state and the seventh capacitor is in the charging state; and the output voltage of the power supply circuit is twice the input voltage of the power supply circuit.

[0025] In some possible embodiments of the first aspect described above, when the combined switch module is in the charging phase of the third mode, the second power switch and the ninth power switch are in the on state, and the first power switch, the third power switch, the fourth power switch, the fifth power switch, the sixth power switch, the seventh power switch, and the eighth power switch are in the off state; when the combined switch module is in the discharging phase of the third mode, the fourth power switch and the eighth power switch are in the on state, and the first power switch, the second power switch, the third power switch, the fifth power switch, the sixth power switch, the seventh power switch, and the ninth power switch are in the off state.

[0026] In some possible embodiments of the first aspect above, when the switch control signal is the fourth switch control signal, the target switch mode is the fourth mode; the combination switch module is used to be in the fourth mode according to the fourth switch control signal, wherein when the combination switch module is in the fourth mode, the first capacitor, the second capacitor, the third capacitor, the fourth capacitor and the fifth capacitor are disconnected, and the output voltage of the power supply circuit is 1 times the input voltage of the power supply circuit.

[0027] In some possible embodiments of the first aspect described above, when the combination switch module is in the fourth mode, the first power switch, the third power switch, the fifth power switch, the sixth power switch, the seventh power switch, the eighth power switch, and the ninth power switch are in the on state, while the second power switch and the fourth power switch are in the off state.

[0028] In some possible embodiments of the first aspect described above, when the combination switch module is in the fourth mode, the eighth and ninth power switches are in the on state, while the first, second, third, fourth, fifth, sixth, and seventh power switches are in the off state.

[0029] Secondly, embodiments of this application provide a chip in which the circuit described in the first aspect is formed.

[0030] Thirdly, embodiments of this application provide an electronic device, which includes a chip in which the circuit described in the first aspect is formed.

[0031] It is understandable that the technical effects of the second and third aspects can be referred to the technical effects of the first aspect, and will not be elaborated further. Attached Figure Description

[0032] Figure 1 According to some embodiments of this application, a block diagram of a power supply circuit 10 is shown;

[0033] Figure 2 According to some embodiments of this application, a framework diagram of a power supply circuit 10 is shown;

[0034] Figure 3 According to some embodiments of this application, a structural diagram of a power supply circuit 10 is shown;

[0035] Figure 4 According to some embodiments of this application, a schematic diagram of the current flow direction of a 4x mode charging phase is shown;

[0036] Figure 5 According to some embodiments of this application, a schematic diagram of the current flow direction of a 4x mode discharge phase is shown;

[0037] Figure 6 According to some embodiments of this application, a schematic diagram of the current flow direction of a 3x mode charging phase is shown;

[0038] Figure 7 According to some embodiments of this application, a schematic diagram of the current flow direction of a 3x mode discharge phase is shown;

[0039] Figure 8According to some embodiments of this application, a schematic diagram of the current flow direction of a 2x mode charging phase is shown;

[0040] Figure 9 According to some embodiments of this application, a schematic diagram of the current flow direction of a 2x mode discharge phase is shown;

[0041] Figure 10 According to some embodiments of this application, a schematic diagram of current flow in a 1x mode is shown;

[0042] Figure 11 According to some embodiments of this application, a structural diagram of another power supply circuit 10 is shown;

[0043] Figure 12 According to some embodiments of this application, a schematic diagram of the current flow direction of another 2x mode charging phase is shown;

[0044] Figure 13 According to some embodiments of this application, a schematic diagram of the current flow direction of another 2x mode discharge phase is shown;

[0045] Figure 14 According to some embodiments of this application, a schematic diagram of current flow in another 1x mode is shown;

[0046] Figure 15 According to some embodiments of this application, a block diagram of a power supply circuit 10A is shown;

[0047] Figure 16 According to some embodiments of this application, a schematic diagram of the structure of an electronic device 100 is shown. Detailed Implementation

[0048] The illustrative embodiments of this application include, but are not limited to, a power supply circuit, a chip, and an electronic device. The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0049] As users increasingly demand enhanced experiences such as audio playback and haptic feedback in electronic devices, these devices require boosting of power supply voltage to drive components like audio power amplifiers and motor drivers. For example, an electronic device may include a power supply circuit for controlling the power supply voltage. The input of this circuit is connected to a power source, and its output is connected to the input of a load circuit (such as one containing audio power amplifiers and motor drivers). The electronic device can boost the power supply voltage through this circuit, thereby driving the audio power amplifiers and motor drivers with the resulting higher voltage to achieve higher-power audio playback or vibration.

[0050] However, current power supply circuits can only boost the power supply voltage to 1.5, 2, or 3 times. Even in 3x mode, the output voltage is still relatively low (e.g., around 6.3~12.6V), which cannot meet the needs of applications requiring higher voltages. Furthermore, the higher the boost factor, the more power switching transistors are typically configured in the power supply circuit, leading to complex switching control timing. High-multiplier boosts also require multi-phase control, affecting the output drive capability.

[0051] Therefore, this application provides a power supply circuit 10. For example... Figure 1 As shown, the output terminal of the power supply circuit 10 is connected to the input terminal of the load circuit 20. The power supply circuit 10 includes a control module 11, a combination switch module 12, and an adjustment module 13. The control module 11 is connected to the combination switch module 12, and the combination switch module 12 is connected to the adjustment module 13. The control module 11 outputs a switch control signal to the combination switch module 12. The combination switch module 12 switches to the corresponding target switch mode according to different switch control signals. The adjustment module 13 adjusts the input voltage of the power supply circuit 10 according to the target switch mode and discharges to the output terminal of the power supply circuit 10 based on the adjusted voltage, so that the output voltage of the power supply circuit 10 is greater than or equal to the input voltage of the power supply circuit 10. When the combination switch module 12 is in different target switch modes, the output voltage of the power supply circuit 10 is a different multiple of the input voltage of the power supply circuit 10, and the different multiples include at least 4 times.

[0052] It is understood that this application controls different switch control signals through the control module 11, controlling the combination switch module 12 to be in different target switch modes. Then, the adjustment module 13 adjusts the input voltage of the power supply circuit 10 accordingly based on the different target switch modes, thereby achieving mode switching for boosting the input voltage of the power supply circuit 10 by different multiples and improving boost efficiency. Furthermore, it can boost the output voltage of the power supply circuit 10 to four times the input voltage, achieving a 4x boost.

[0053] In some embodiments, the target switching mode includes a first mode, a second mode, a third mode, and a fourth mode. When the target switching mode is the first mode, the second mode, the third mode, or the fourth mode, the output voltage of the power supply circuit is 4 times, 3 times, 2 times, or 1 times the input voltage of the power supply circuit, respectively. The specific boost principle will be described in detail below and will not be repeated here.

[0054] In some embodiments, the load circuit 20 may be a resistive load such as an audio power amplifier, a motor driver, or an LED driver, or a capacitive load such as a ceramic speaker or a liquid-cooled actuator; there are no specific limitations.

[0055] Figure 2According to some embodiments of this application, a framework diagram of a power supply circuit 10 is shown. For example... Figure 2 As shown, the input voltage of the power supply circuit 10 is denoted as VDD (hereinafter referred to as input voltage VDD), and the output voltage of the power supply circuit 10 is denoted as VOUT (hereinafter referred to as output voltage VOUT). The output terminal of the power supply circuit 10 is connected to the input terminal of the load circuit. Exemplarily, the power supply circuit 10 includes an input capacitor, a boost charge pump, a charge pump capacitor, and an output capacitor. The boost charge pump includes a clock and control circuit, a drive circuit, and a charge pump power switch network. The charge pump capacitor includes a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, and a fifth capacitor C5.

[0056] For example, combined Figure 1 and Figure 2 As shown, Figure 2 The clock and control circuit and drive circuit shown correspond to the following: Figure 1 Example of control module 11 shown; Figure 2 The charge pump power switch network shown corresponds to: Figure 1 Example of the combination switch module 12 shown; Figure 2 The capacitors C1, C2, C3, C4, and C5 shown correspond to the following: Figure 1 An example of adjustment module 13 is shown.

[0057] In some embodiments, see continue to see Figure 2 As shown, the clock and control circuit sends a signal Vctrl_i to the drive circuit, which in turn drives the drive circuit to send a signal Vdrv_i to the charge pump power switch network. This controls the charge pump power switch network to switch to the corresponding target switching mode. Subsequently, the adjustment module 13 adjusts the input voltage of the power supply circuit 10 according to the corresponding target switching mode to achieve different boost ratios and output voltage. For example, the first capacitor C1, the second capacitor C2, the third capacitor C3, the fourth capacitor C4, and the fifth capacitor C5, as well as the output capacitor and the input capacitor in the adjustment module 13, switch between charging and discharging states according to the corresponding target switching modes, so that the output voltage of the power supply circuit is 1, 2, 3, or 4 times the input voltage of the power supply circuit.

[0058] For example, signals Vctrl_i and Vdrv_i correspond to examples of switch control signals. The switch control signals, target switch modes, and the boost principles of different modes will be described in detail below and will not be repeated here.

[0059] In some embodiments, the charge pump power switching network includes multiple power switches. The charge pump power switching network achieves the corresponding target switching mode through the on and off states of each power switch. The structure of each power switch will be described in detail below and will not be repeated here.

[0060] In some embodiments, the branch containing the input capacitor corresponds to the protection circuit of the power supply circuit 10, which is used to stably supply voltage VDD to the input terminal of the power supply circuit 10 when abnormalities such as power supply voltage occur at the input terminal of the power supply circuit 10, so as to ensure that the power supply circuit 10 is normal.

[0061] The embodiments of this application are described below through different examples.

[0062] Figure 3 According to some embodiments of this application, a structural diagram of a power supply circuit 10 is shown. For example... Figure 3 As shown, the power supply circuit 10 includes a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor Cin, a seventh capacitor Cout, a first power switch S1, a second power switch S2, a third power switch S3, a fourth power switch S4, a fifth power switch S5, a sixth power switch S6, a seventh power switch S7, and an eighth power switch S8.

[0063] It can be understood that the first power switch S1 to the eighth power switch S8 correspond to the aforementioned Figure 1 Example of a combination switch module 12 or Figure 2 Example of a medium charge pump power switching network; capacitors C1 to Cout correspond to the aforementioned Figure 1 An example of the adjustment module 13, wherein the first capacitor C1 to the fifth capacitor C5 correspond to the aforementioned Figure 2 An example of a charge pump capacitor, the sixth capacitor Cin corresponds to the aforementioned Figure 2 The example of the input capacitor, the seventh capacitor Cout corresponds to the aforementioned Figure 2 Example of an output capacitor.

[0064] In some embodiments, the first capacitor C1, the second capacitor C2, the third capacitor C3, the fourth capacitor C4, and the fifth capacitor C5 are flying capacitors, the sixth capacitor Cin and the seventh capacitor Cout are voltage regulator capacitors, and the first power switch S1 to the eighth power switch S8 are PMOS transistors or NMOS transistors, without any specific limitation.

[0065] In some embodiments, the first capacitor C1, the second capacitor C2, the third capacitor C3, the fourth capacitor C4, and the fifth capacitor C5 may be integrated within the power supply circuit 10. In other embodiments, the first capacitor C1, the second capacitor C2, the third capacitor C3, the fourth capacitor C4, and the fifth capacitor C5 may be externally located outside the power supply circuit 10.

[0066] The following description of the first and second terminals of the first power switch S1 represents the source and drain of the first power switch S1, or the drain and source of the first power switch S1, and the gate of the first power switch S1 is connected to the control module; the second power switch S2 to the eighth power switch S8 are similar to the first power switch S1.

[0067] The following description of the first and second terminals of the first capacitor C1 refers to the positive and negative plates of the first capacitor C1, or the negative and positive plates of the first capacitor C1; the same applies to the second capacitor C2 to the seventh capacitor Cout.

[0068] The following are Figure 3 The connection relationships of the devices shown are illustrated in the following example:

[0069] Connection relationship of the first power switch S1: The first terminal of the first power switch S1 is connected to the input terminal of the power supply circuit, the first terminal of the sixth capacitor Cin and the first terminal of the fourth power switch S4, and the second terminal of the first power switch S1 is connected to the first terminal of the first capacitor C1 and the first terminal of the fifth power switch S5.

[0070] The connection relationship of the second power switch S2 is as follows: the first end of the second power switch S2 is connected to the second end of the fourth power switch S4, the second end of the first capacitor C1, the second end of the third capacitor C3 and the second end of the fifth capacitor C5, and the second end of the second power switch S2 is grounded.

[0071] The connection relationship of the third power switch S3 is as follows: the first end of the third power switch S3 is connected to the first end of the second capacitor C2 and the second end of the fifth power switch S5, and the second end of the third power switch S3 is connected to the first end of the third capacitor C3 and the first end of the sixth power switch S6.

[0072] The connection relationship of the fourth power switch S4: The first terminal of the fourth power switch S4 is connected to the input terminal of the power supply circuit, the first terminal of the sixth capacitor Cin, and the first terminal of the first power switch S1. The second terminal of the fourth power switch S4 is connected to the first terminal of the second power switch S2, the second terminal of the first capacitor C1, the second terminal of the third capacitor C3, and the second terminal of the fifth capacitor C5.

[0073] The connection relationship of the fifth power switch S5: the first end of the fifth power switch S5 is connected to the second end of the first power switch S1 and the first end of the first capacitor C1, and the second end of the fifth power switch S5 is connected to the first end of the third power switch S3 and the first end of the second capacitor C2.

[0074] The connection relationship of the sixth power switch S6: the first terminal of the sixth power switch S6 is connected to the second terminal of the third power switch S3 and the first terminal of the third capacitor C3, and the second terminal of the sixth power switch S6 is connected to the first terminal of the fourth capacitor C4 and the first terminal of the seventh power switch S7.

[0075] The connection relationship of the seventh power switch S7: The first terminal of the seventh power switch S7 is connected to the second terminal of the sixth power switch S6 and the first terminal of the fourth capacitor C4. The second terminal of the seventh power switch S7 is connected to the first terminal of the fifth capacitor C5 and the first terminal of the eighth power switch S8.

[0076] Connection relationship of the eighth power switch S8: The first terminal of the eighth power switch S8 is connected to the second terminal of the seventh power switch S7 and the first terminal of the fifth capacitor C5. The second terminal of the eighth power switch S8 is connected to the output terminal of the power supply circuit and the first terminal of the seventh capacitor Cout.

[0077] The connection relationship of the first capacitor C1: The first end of the first capacitor C1 is connected to the second end of the first power switch S1 and the first end of the fifth power switch S5. The second end of the first capacitor C1 is connected to the second end of the fourth power switch S4, the first end of the second power switch S2, the second end of the third capacitor C3 and the second end of the fifth capacitor C5.

[0078] The connection relationship of the second capacitor C2: The first end of the second capacitor C2 is connected to the second end of the fifth power switch S5 and the first end of the third power switch S3. The second end of the second capacitor C2 is connected to the second end of the fourth capacitor C4, the second end of the eighth power switch S8, the first end of the seventh capacitor Cout, and the output terminal of the power supply circuit.

[0079] The connection relationship of the third capacitor C3: The first end of the third capacitor C3 is connected to the second end of the third power switch S3 and the first end of the sixth power switch S6. The second end of the third capacitor C3 is connected to the second end of the first capacitor C1, the second end of the fourth power switch S4, and the first end of the second power switch S2.

[0080] The connection relationship of the fourth capacitor C4: The first end of the fourth capacitor C4 is connected to the second end of the sixth power switch S6 and the first end of the seventh power switch S7. The second end of the fourth capacitor C4 is connected to the second end of the second capacitor C2, the second end of the eighth power switch S8, the first end of the seventh capacitor Cout, and the output terminal of the power supply circuit.

[0081] The connection relationship of the fifth capacitor C5: The first end of the fifth capacitor C5 is connected to the second end of the seventh power switch S7 and the first end of the eighth power switch S8. The second end of the fifth capacitor C5 is connected to the second end of the first capacitor C1, the second end of the fourth power switch S4, the first end of the second power switch S2, and the second end of the third capacitor C3.

[0082] The connection relationship of the sixth capacitor Cin: The first terminal of the sixth capacitor Cin is connected to the input terminal of the power supply circuit, the first terminal of the fourth power switch S4 and the first terminal of the first power switch S1, and the second terminal of the sixth capacitor Cin is grounded.

[0083] The connection relationship of the seventh capacitor Cout: The first terminal of the seventh capacitor Cout is connected to the second terminal of the fourth capacitor C4, the second terminal of the eighth power switch S8, and the output terminal of the power supply circuit. The second terminal of the seventh capacitor Cout is grounded.

[0084] In other embodiments, Figure 3 The second terminal of the second capacitor C2 shown can also be directly grounded.

[0085] In other embodiments, Figure 3 The second terminal of the fourth capacitor C4 shown can also be directly grounded.

[0086] In some other embodiments, Figure 3 The second terminal of the second capacitor C2 and the second terminal of the fourth capacitor C4 shown can both be grounded.

[0087] In some embodiments, the voltage variation range of each of the power switches S1, S2, S3, S4, S5, S6, S7, and S8 is less than or equal to the input voltage VDD of the power supply circuit 10.

[0088] It can be understood that the voltage variation range of a power switch can be the voltage variation range between the source and drain terminals of the power switch. The voltage variation range of each power switch is less than or equal to the input voltage of the power supply circuit 10, that is, each power switch is a low-voltage power switch. Compared with high-voltage power switches, low-voltage power switches are simpler to design and have higher chip area utilization.

[0089] The following are Figure 3 The principle of the 4x boost converter in the power supply circuit shown is illustrated with an example.

[0090] In some embodiments, see Figure 1 As shown, when the control module 11 outputs a first switch control signal to the combination switch module 12, the target switch mode is the first mode (4x mode). The combination switch module 12 alternately operates in the charging and discharging phases of this first mode based on the first switch control signal. For example, during the process of the combination switch module 12 alternately operating in the charging and discharging phases of the first mode, the adjustment module 13 performs a corresponding 4x mode boost adjustment on the input voltage VDD of the power supply circuit 10, so that the output voltage VOUT of the power supply circuit 10 is 4 times the input voltage VDD of the power supply circuit 10. See the following for details. Figure 4 and Figure 5 Description:

[0091] In some embodiments, combined with Figure 3 and Figure 4 As shown, when the combined switch module 12 is in the charging phase of the 4x mode, the first power switch S1, the second power switch S2, the third power switch S3, and the seventh power switch S7 are in the on state, while the fourth power switch S4, the fifth power switch S5, the sixth power switch S6, and the eighth power switch S8 are in the off state. At this time, the first capacitor C1, the third capacitor C3, and the fifth capacitor C5 are in the charging state, while the second capacitor C2, the fourth capacitor C4, and the seventh capacitor Cout are in the discharging state.

[0092] See also Figure 4 As shown, when the combination switch module 12 is in the charging phase of the 4x mode, the current flow is as indicated by the dashed line. The input voltage VDD at the input terminal of the power supply circuit 10 is connected to the first terminal of the first capacitor C1. The first capacitor C1 is charged based on the input voltage VDD, making the voltage on the first capacitor C1 VDD. The second capacitor C2 charges the third capacitor C3, making the voltage on the third capacitor C3 2VDD. The fourth capacitor C4 charges the fifth capacitor C5, making the voltage on the fifth capacitor C5 3VDD. The voltage at the first terminal of the seventh capacitor Cout is 4VDD. The seventh capacitor Cout discharges to the output terminal of the power supply circuit 10, that is, the output voltage VOUT of the power supply circuit 10 is 4VDD, achieving a 4x boost.

[0093] See also Figure 4As shown, the voltage at the first terminal (CP1P) of the first capacitor C1 is VDD, and the voltage at the second terminal (CP1N) of the first capacitor C1 is 0; the voltage at the first terminal (CP2P) of the second capacitor C2 is 2VDD, and the voltage at the second terminal of the second capacitor C2 is 4VDD; the voltage at the first terminal (CP3P) of the third capacitor C3 is 2VDD, and the voltage at the second terminal (CP1N) of the third capacitor C3 is 0; the voltage at the first terminal (CP4P) of the fourth capacitor C4 is 3VDD, and the voltage at the second terminal of the fourth capacitor C4 is 4VDD; the voltage at the first terminal (CP5P) of the fifth capacitor C5 is 3VDD, and the voltage at the second terminal (CP1N) of the fifth capacitor C5 is 0.

[0094] Correspondingly, the voltages across the first power switch S1 are both VDD, the voltages across the second power switch S2 are both 0, the voltages across the third power switch S3 are both 2VDD, the voltages across the fourth power switch S4 are both 0 and VDD, the voltages across the fifth power switch S5 are both VDD and 2VDD, the voltages across the sixth power switch S6 are both 2VDD and 3VDD, the voltages across the seventh power switch S7 are both 3VDD, and the voltages across the eighth power switch S8 are both 3VDD and 4VDD.

[0095] It can be seen that the voltage variation range between the two ends of each power switch is less than or equal to VDD, which means that each power switch can be a low-voltage power switch, thereby simplifying the circuit design and improving the chip area utilization.

[0096] In some embodiments, combined with Figure 3 and Figure 5 As shown, when the combined switch module 12 is in the discharge phase of the 4x mode, the first power switch S1, the second power switch S2, the third power switch S3, and the seventh power switch S7 are in the off state, while the fourth power switch S4, the fifth power switch S5, the sixth power switch S6, and the eighth power switch S8 are in the on state. At this time, the first capacitor C1, the third capacitor C3, and the fifth capacitor C5 are in the discharge state, while the second capacitor C2, the fourth capacitor C4, and the seventh capacitor Cout are in the charging state.

[0097] See also Figure 5As shown, when the combination switch module 12 is in the discharge phase of the 4x mode, the current flow is as shown by the dashed line. The input voltage VDD of the power supply circuit 10 is connected to the second terminal of the first capacitor C1, the second terminal of the third capacitor C3, and the second terminal of the fifth capacitor C5. At this time, the voltage of the first terminal (CP1P) of the first capacitor C1 is 2VDD. Since the fifth power switch S5 is turned on, the first capacitor C1 charges the second capacitor C2 to 2VDD. The voltage on the third capacitor C3 is 2VDD, and its second terminal (CP1N) is connected to VDD, making the voltage of the first terminal (CP4P) of the fourth capacitor C4 3VDD. The voltage on the fifth capacitor C5 is 3VDD, and its second terminal is connected to VDD, making the voltage of the first terminal (CP5P) of the fifth capacitor C5 4VDD. Since the eighth power switch S8 is turned on, the output voltage VOUT of the output terminal is 4VDD, realizing a 4x boost.

[0098] See also Figure 5 As shown, the voltage at the first terminal (CP1P) of the first capacitor C1 is 2VDD, and the voltage at the second terminal (CP1N) of the first capacitor C1 is VDD; the voltage at the first terminal (CP2P) of the second capacitor C2 is 2VDD, and the voltage at the second terminal of the second capacitor C2 is 4VDD; the voltage at the first terminal (CP3P) of the third capacitor C3 is 3VDD, and the voltage at the second terminal (CP1N) of the third capacitor C3 is VDD; the voltage at the first terminal (CP4P) of the fourth capacitor C4 is 3VDD, and the voltage at the second terminal of the fourth capacitor C4 is 4VDD; the voltage at the first terminal (CP5P) of the fifth capacitor C5 is 4VDD, and the voltage at the second terminal (CP1N) of the fifth capacitor C5 is VDD.

[0099] Correspondingly, the voltages across the first power switch S1 are VDD and 2VDD, the voltages across the second power switch S2 are 0 and VDD, the voltages across the third power switch S3 are 2VDD and 3VDD, the voltages across the fourth power switch S4 are both VDD, the voltages across the fifth power switch S5 are both VDD and 2VDD, the voltages across the sixth power switch S6 are both 3VDD, the voltages across the seventh power switch S7 are both 3VDD and 4VDD, and the voltage across the eighth power switch S8 is both 4VDD.

[0100] It can be seen that the voltage variation range between the two ends of each power switch is less than or equal to VDD, which means that each power switch can be a low-voltage power switch, thereby simplifying the circuit design and improving the chip area utilization.

[0101] The following are Figure 3 The principle of the 3x boost converter in the power supply circuit shown is illustrated with an example.

[0102] In some embodiments, see Figure 1 As shown, when the control module 11 outputs a second switch control signal to the combination switch module 12, the target switch mode is the second mode (3x mode). The combination switch module 12 alternately operates in the charging and discharging phases of this second mode based on the second switch control signal. For example, during the process of the combination switch module 12 alternately operating in the charging and discharging phases of the second mode, the adjustment module 13 performs a corresponding 3x mode boost adjustment on the input voltage VDD of the power supply circuit 10, so that the output voltage VOUT of the power supply circuit 10 is 3 times the input voltage VDD of the power supply circuit 10. See the following for details. Figure 6 and Figure 7 Description:

[0103] In some embodiments, combined with Figure 3 and Figure 6 As shown, when the combined switch module 12 is in the charging phase of the 3x mode, the first power switch S1, the second power switch S2, the third power switch S3, the fifth power switch S5, and the seventh power switch S7 are in the on state, while the fourth power switch S4, the sixth power switch S6, and the eighth power switch S8 are in the off state. At this time, the first capacitor C1, the third capacitor C3, and the fifth capacitor C5 are in the charging state, while the fourth capacitor C4 and the seventh capacitor Cout are in the discharging state.

[0104] See also Figure 6 As shown, when the combination switch module 12 is in the charging phase of the 3x mode, the current flow is as indicated by the dashed line. The input voltage VDD of the power supply circuit 10 is connected to the first terminal of the first capacitor C1, the first terminal of the second capacitor C2, and the first terminal of the third capacitor C3. The second terminals of the first capacitor C1, the third capacitor C3, and the fifth capacitor C5 are grounded. The voltage across the first capacitor C1, the third capacitor C3, and the fourth capacitor C4 is VDD, and the voltage across the second capacitor C2 and the fifth capacitor C5 is 2VDD. The voltage at the first terminal of the seventh capacitor Cout is 3VDD. The seventh capacitor Cout discharges to the output terminal of the power supply circuit 10, that is, the output voltage VOUT of the power supply circuit 10 is 3VDD, achieving a 3x voltage boost.

[0105] See also Figure 6As shown, the voltage at the first terminal (CP1P) of the first capacitor C1 is VDD, and the voltage at the second terminal (CP1N) of the first capacitor C1 is 0; the voltage at the first terminal (CP2P) of the second capacitor C2 is VDD, and the voltage at the second terminal of the second capacitor C2 is 3VDD; the voltage at the first terminal (CP3P) of the third capacitor C3 is VDD, and the voltage at the second terminal (CP1N) of the third capacitor C3 is 0; the voltage at the first terminal (CP4P) of the fourth capacitor C4 is 2VDD, and the voltage at the second terminal of the fourth capacitor C4 is 3VDD; the voltage at the first terminal (CP5P) of the fifth capacitor C5 is 2VDD, and the voltage at the second terminal (CP1N) of the fifth capacitor C5 is 0.

[0106] Correspondingly, the voltages across the first power switch S1 are both VDD, the voltages across the second power switch S2 are both 0, the voltages across the third power switch S3 are both VDD, the voltages across the fourth power switch S4 are VDD and 0 respectively, the voltages across the fifth power switch S5 are both VDD, the voltages across the sixth power switch S6 are both VDD and 2VDD respectively, the voltages across the seventh power switch S7 are both 2VDD, and the voltages across the eighth power switch S8 are 2VDD and 3VDD respectively.

[0107] It can be seen that the voltage variation range between the two ends of each power switch is less than or equal to VDD, which means that each power switch can be a low-voltage power switch, thereby simplifying the circuit design and improving the chip area utilization.

[0108] In some embodiments, combined with Figure 3 and Figure 7 As shown, when the combined switch module 12 is in the discharge phase of the 3x mode, the first power switch S1, the second power switch S2, the third power switch S3, the fifth power switch S5, and the seventh power switch S7 are in the off state, while the fourth power switch S4, the sixth power switch S6, and the eighth power switch S8 are in the on state. At this time, the third capacitor C3 and the fifth capacitor C5 are in the discharge state, while the fourth capacitor C4 and the seventh capacitor Cout are in the charging state.

[0109] See also Figure 7As shown, when the combination switch module 12 is in the discharge phase of the 3x mode, the current flow is as shown by the dashed line. The input voltage VDD of the input terminal of the power supply circuit 10 is connected to the second terminal of the first capacitor C1, the second terminal of the third capacitor C3, and the second terminal of the fifth capacitor C5. The first terminal of the first capacitor C1 and the first terminal of the second capacitor C2 maintain a constant voltage due to the disconnection of the first power switch S1, the third power switch S3, and the fifth power switch S5. The first terminal of the third capacitor C3 is connected to CP4P, making the voltage of CP4P 2VDD. The first terminal of the fifth capacitor C5 is connected to the output terminal, making the output voltage VOUT of the output terminal 3VDD, thus achieving a 3x boost.

[0110] See also Figure 7 As shown, the voltage at the first terminal (CP1P) of the first capacitor C1 is VDD, and the voltage at the second terminal (CP1N) of the first capacitor C1 is VDD; the voltage at the first terminal (CP2P) of the second capacitor C2 is VDD, and the voltage at the second terminal of the second capacitor C2 is 3VDD; the voltage at the first terminal (CP3P) of the third capacitor C3 is 2VDD, and the voltage at the second terminal (CP1N) of the third capacitor C3 is VDD; the voltage at the first terminal (CP4P) of the fourth capacitor C4 is 2VDD, and the voltage at the second terminal of the fourth capacitor C4 is 3VDD; the voltage at the first terminal (CP5P) of the fifth capacitor C5 is 3VDD, and the voltage at the second terminal (CP1N) of the fifth capacitor C5 is VDD.

[0111] Correspondingly, the voltage across the first power switch S1 is VDD, the voltage across the second power switch S2 is 0 and VDD respectively, the voltage across the third power switch S3 is VDD and 2VDD respectively, the voltage across the fourth power switch S4 is VDD, the voltage across the fifth power switch S5 is VDD, the voltage across the sixth power switch S6 is 2VDD, the voltage across the seventh power switch S7 is 2VDD and 3VDD respectively, and the voltage across the eighth power switch S8 is 3VDD.

[0112] It can be seen that the voltage variation range between the two ends of each power switch is less than or equal to VDD, which means that each power switch can be a low-voltage power switch, thereby simplifying the circuit design and improving the chip area utilization.

[0113] The following are Figure 3 The principle of boosting voltage by 2 times is illustrated with an example of the power supply circuit shown.

[0114] In some embodiments, see Figure 1As shown, when the control module 11 outputs a third switch control signal to the combination switch module 12, the target switch mode is the third mode (2x mode); the combination switch module 12 alternately operates in the charging and discharging phases of this third mode based on the third switch control signal. For example, during the process of the combination switch module 12 alternately operating in the charging and discharging phases of the third mode, the adjustment module 13 performs a corresponding 2x mode boost adjustment on the input voltage VDD of the power supply circuit 10, so that the output voltage VOUT of the power supply circuit 10 is twice the input voltage VDD of the power supply circuit 10. See the following for details. Figure 8 and Figure 9 Description:

[0115] In some embodiments, combined with Figure 3 and Figure 8 As shown, when the combined switch module 12 is in the charging phase of the 2x mode, the first power switch S1, the second power switch S2, the third power switch S3, the fifth power switch S5, the sixth power switch S6, and the seventh power switch S7 are in the on state, while the fourth power switch S4 and the eighth power switch S8 are in the off state. At this time, the first capacitor C1, the third capacitor C3, and the fifth capacitor C5 are in the charging state, and the seventh capacitor Cout is in the discharging state.

[0116] See also Figure 8 As shown, when the combination switch module 12 is in the charging phase of the 2x mode, the current flow is as indicated by the dashed line. The input voltage VDD at the input terminal of the power supply circuit 10 is connected to the first terminal of the first capacitor C1, the first terminal of the second capacitor C2, the first terminal of the third capacitor C3, the first terminal of the fourth capacitor C4, and the first terminal of the fifth capacitor C5. The second terminals of the first capacitor C1, the third capacitor C3, and the fifth capacitor C5 are grounded. The voltage across the first capacitor C1 to the fifth capacitor C5 is VDD. The voltage at the first terminal of the seventh capacitor Cout is 2VDD. The seventh capacitor Cout discharges to the output terminal of the power supply circuit 10, that is, the output voltage VOUT of the power supply circuit 10 is 2VDD, achieving a 2x voltage boost.

[0117] See also Figure 8As shown, the voltage at the first terminal (CP1P) of the first capacitor C1 is VDD, and the voltage at the second terminal (CP1N) of the first capacitor C1 is 0; the voltage at the first terminal (CP2P) of the second capacitor C2 is VDD, and the voltage at the second terminal of the second capacitor C2 is 2VDD; the voltage at the first terminal (CP3P) of the third capacitor C3 is VDD, and the voltage at the second terminal (CP1N) of the third capacitor C3 is 0; the voltage at the first terminal (CP4P) of the fourth capacitor C4 is VDD, and the voltage at the second terminal of the fourth capacitor C4 is 2VDD; the voltage at the first terminal (CP5P) of the fifth capacitor C5 is VDD, and the voltage at the second terminal (CP1N) of the fifth capacitor C5 is 0.

[0118] Correspondingly, the voltages across the first power switch S1 are both VDD, the voltages across the second power switch S2 are both 0, the voltages across the third power switch S3 are both VDD, the voltages across the fourth power switch S4 are VDD and 0 respectively, the voltages across the fifth power switch S5 are both VDD, the voltages across the sixth power switch S6 are both VDD, the voltages across the seventh power switch S7 are both VDD, and the voltages across the eighth power switch S8 are VDD and 2VDD respectively.

[0119] It can be seen that the voltage variation range between the two ends of each power switch is less than or equal to VDD, which means that each power switch can be a low-voltage power switch, thereby simplifying the circuit design and improving the chip area utilization.

[0120] In some embodiments, combined with Figure 3 and Figure 9 As shown, when the combined switch module 12 is in the discharge phase of the 2x mode, the first power switch S1, the second power switch S2, the third power switch S3, the fifth power switch S5, the sixth power switch S6, and the seventh power switch S7 are in the off state, while the fourth power switch S4 and the eighth power switch S8 are in the on state. At this time, the fifth capacitor C5 is in the discharge state, and the seventh capacitor Cout is in the charging state.

[0121] See also Figure 9As shown, when the combination switch module 12 is in the discharge phase of the 2x mode, the current flow is as shown by the dashed line. The input voltage VDD of the power supply circuit 10 is connected to the second terminal of the first capacitor C1, the second terminal of the third capacitor C3, and the second terminal of the fifth capacitor C5. The first terminal of the first capacitor C1, the first terminal of the second capacitor C2, the first terminal of the third capacitor C3, and the first terminal of the fourth capacitor C4 remain unchanged due to the disconnection of the first power switch S1, the third power switch S3, the fifth power switch S5, the sixth power switch S6, and the seventh power switch S7. The first terminal of the fifth capacitor C5 is connected to the output terminal. Therefore, the output voltage VOUT of the output terminal is 2VDD, realizing a 2x boost.

[0122] See also Figure 9 As shown, the voltage at the first terminal (CP1P) of the first capacitor C1 is VDD, and the voltage at the second terminal (CP1N) of the first capacitor C1 is VDD; the voltage at the first terminal (CP2P) of the second capacitor C2 is VDD, and the voltage at the second terminal of the second capacitor C2 is 2VDD; the voltage at the first terminal (CP3P) of the third capacitor C3 is VDD, and the voltage at the second terminal (CP1N) of the third capacitor C3 is VDD; the voltage at the first terminal (CP4P) of the fourth capacitor C4 is VDD, and the voltage at the second terminal of the fourth capacitor C4 is 2VDD; the voltage at the first terminal (CP5P) of the fifth capacitor C5 is 2VDD, and the voltage at the second terminal (CP1N) of the fifth capacitor C5 is VDD.

[0123] Correspondingly, the voltage across the first power switch S1 is VDD, the voltage across the second power switch S2 is 0 and VDD respectively, the voltage across the third power switch S3 is VDD, the voltage across the fourth power switch S4 is VDD, the voltage across the fifth power switch S5 is VDD, the voltage across the sixth power switch S6 is VDD, the voltage across the seventh power switch S7 is VDD and 2VDD respectively, and the voltage across the eighth power switch S8 is 2VDD.

[0124] It can be seen that the voltage variation range between the two ends of each power switch is less than or equal to VDD, which means that each power switch can be a low-voltage power switch, thereby simplifying the circuit design and improving the chip area utilization.

[0125] The following are Figure 3 The principle of boosting voltage by 1 is illustrated by the power supply circuit shown.

[0126] In some embodiments, see Figure 1As shown, when the control module 11 outputs a fourth switch control signal to the combination switch module 12, the target switch mode is the fourth mode (1x mode); the combination switch module 12 is in the fourth mode based on this fourth switch control signal. For example, while the combination switch module 12 is in the fourth mode, the adjustment module 13 performs a corresponding 1x mode boost adjustment on the input voltage VDD of the power supply circuit 10, so that the output voltage VOUT of the power supply circuit 10 is 1x the input voltage VDD of the power supply circuit 10. See the following for details. Figure 10 Description:

[0127] In some embodiments, combined with Figure 3 and Figure 10 As shown, when the combination switch module 12 is in 1x mode, the first power switch S1, the third power switch S3, the fifth power switch S5, the sixth power switch S6, the seventh power switch S7, and the eighth power switch S8 are in the on state, while the second power switch S2 and the fourth power switch S4 are in the off state. At this time, the first capacitor C1 to the fifth capacitor C5 are all open-circuited, and the input terminal is directly connected to the output terminal. That is, when the combination switch module 12 is in the fourth mode, the input voltage VDD of the power supply circuit 10 is equal to the output voltage VOUT of the power supply circuit 10, both being the input voltage VDD, thus achieving the boost mode of 1x.

[0128] It is understandable that if the power supply circuit 10 is always in forced boost mode during operation, the power consumption will be high, resulting in a significant reduction in overall efficiency. Therefore, different boost modes with varying multipliers are achieved by controlling the conduction state and timing of each power switch in the combination switch module 12. In particular, when the load is small, by controlling the conduction of the first power switch S1, the third power switch S3, the fifth power switch S5, the sixth power switch S6, the seventh power switch S7, and the eighth power switch S8, the power supply circuit 10 is placed in a 1x shoot-through mode, which can greatly reduce overall power consumption and improve efficiency.

[0129] Figure 11 According to some embodiments of this application, a structural diagram of another power supply circuit 10 is shown.

[0130] Combination Figure 3 and Figure 11 As shown, compared to Figure 3 , Figure 11 The difference is the addition of a ninth power switch, S9. For example... Figure 11 As shown, the first terminal of the ninth power switch S9 is connected to the input terminal of the power supply circuit, and the second terminal of the ninth power switch S9 is connected to the second terminal of the seventh power switch S7, the first terminal of the fifth capacitor C5, and the first terminal of the eighth power switch S8. Figure 11Other devices besides the ninth power switch S9 and Figure 3 The connection relationships shown are similar; please refer to the section above for details. Figure 3 The description of that will not be repeated here.

[0131] In some embodiments, the voltage variation range of each of the following power switches—first power switch S1, second power switch S2, third power switch S3, fourth power switch S4, fifth power switch S5, sixth power switch S6, seventh power switch S7, and eighth power switch S8—is less than or equal to the input voltage VDD of the power supply circuit 10. The voltage variation range of the ninth power switch S9 is greater than the input voltage VDD of the power supply circuit 10. That is, the first power switch S1 to the eighth power switch S8 are all low-voltage power switches, and the ninth power switch S9 is a high-voltage power switch.

[0132] Understandable. Figure 11 The power supply circuit shown has a 4x boost principle and Figure 3 The power supply circuit shown uses the same 4x boost principle; please refer to the above text for details. Figure 4 and Figure 5 The description of that will not be repeated here.

[0133] as well as, Figure 11 The power supply circuit shown has a 3x boost principle and Figure 3 The power supply circuit shown uses the same 3x boost principle; please refer to the above text for details. Figure 6 and Figure 7 The description of that will not be repeated here.

[0134] The following are Figure 11 The principle of boosting voltage by 2 times is illustrated with an example of the power supply circuit shown.

[0135] In some embodiments, see Figure 1 As shown, when the control module 11 outputs a third switch control signal to the combination switch module 12, the target switch mode is the third mode (2x mode); the combination switch module 12 alternately operates in the charging and discharging phases of this third mode based on the third switch control signal. For example, during the process of the combination switch module 12 alternately operating in the charging and discharging phases of the third mode, the adjustment module 13 performs a corresponding 2x mode boost adjustment on the input voltage VDD of the power supply circuit 10, so that the output voltage VOUT of the power supply circuit 10 is twice the input voltage VDD of the power supply circuit 10. See the following for details. Figure 12 and Figure 13 Description:

[0136] In some embodiments, combined with Figure 11 and Figure 12As shown, when the combined switch module 12 is in the charging phase of the 2x mode, the first power switch S1, the third power switch S3, the fourth power switch S4, the fifth power switch S5, the sixth power switch S6, the seventh power switch S7, and the eighth power switch S8 are in the off state, while the second power switch S2 and the ninth power switch S9 are in the on state. At this time, the fifth capacitor C5 is in the charging state, and the seventh capacitor Cout is in the discharging state.

[0137] See also Figure 12 As shown, when the combination switch module 12 is in the charging phase of the 2x mode, the current flow is as indicated by the dashed line. The input voltage VDD at the input terminal of the power supply circuit 10 is connected to the first terminal of the fifth capacitor C5, and the second terminal of the fifth capacitor C5 is grounded. The voltage across the fifth capacitor C5 is VDD. The voltage at the first terminal of the seventh capacitor Cout is 2VDD. The seventh capacitor Cout discharges to the output terminal of the power supply circuit 10, that is, the output voltage VOUT of the power supply circuit 10 is 2VDD, achieving a 2x voltage boost.

[0138] See also Figure 12 As shown, the voltage at the first terminal (CP1P) of the first capacitor C1 is 0, and the voltage at the second terminal (CP1N) of the first capacitor C1 is 0; the voltage at the first terminal (CP2P) of the second capacitor C2 is 2VDD, and the voltage at the second terminal of the second capacitor C2 is 2VDD; the voltage at the first terminal (CP3P) of the third capacitor C3 is 0, and the voltage at the second terminal (CP1N) of the third capacitor C3 is 0; the voltage at the first terminal (CP4P) of the fourth capacitor C4 is 2VDD, and the voltage at the second terminal of the fourth capacitor C4 is 2VDD; the voltage at the first terminal (CP5P) of the fifth capacitor C5 is VDD, and the voltage at the second terminal (CP1N) of the fifth capacitor C5 is 0.

[0139] Correspondingly, the voltages across the first power switch S1 are 0 and VDD, the voltages across the second power switch S2 are both 0, the voltages across the third power switch S3 are 2VDD and 0, the voltages across the fourth power switch S4 are VDD and 0, the voltages across the fifth power switch S5 are 0 and 2VDD, the voltages across the sixth power switch S6 are 0 and 2VDD, the voltages across the seventh power switch S7 are VDD and 2VDD, the voltages across the eighth power switch S8 are VDD and 2VDD, and the voltage across the ninth power switch S9 is VDD.

[0140] In some embodiments, combined with Figure 11 and Figure 13As shown, when the combined switch module 12 is in the discharge phase of the 2x mode, the first power switch S1, the second power switch S2, the third power switch S3, the fifth power switch S5, the sixth power switch S6, the seventh power switch S7, and the ninth power switch S9 are in the off state, while the fourth power switch S4 and the eighth power switch S8 are in the on state. At this time, the fifth capacitor C5 is in the discharge state, and the seventh capacitor Cout is in the charging state.

[0141] See also Figure 13 As shown, when the combination switch module 12 is in the discharge phase of the 2x mode, the current flow is as shown by the dashed line. The input voltage VDD of the input terminal of the power supply circuit 10 is connected to the second terminal of the fifth capacitor C5, and the first terminal of the fifth capacitor C5 is connected to the output terminal. Therefore, the output voltage VOUT of the output terminal is 2VDD, realizing a 2x boost.

[0142] See also Figure 13 As shown, the voltage at the first terminal (CP1P) of the first capacitor C1 is VDD, and the voltage at the second terminal (CP1N) of the first capacitor C1 is VDD; the voltage at the first terminal (CP2P) of the second capacitor C2 is 2VDD, and the voltage at the second terminal of the second capacitor C2 is 2VDD; the voltage at the first terminal (CP3P) of the third capacitor C3 is VDD, and the voltage at the second terminal (CP1N) of the third capacitor C3 is VDD; the voltage at the first terminal (CP4P) of the fourth capacitor C4 is 2VDD, and the voltage at the second terminal of the fourth capacitor C4 is 2VDD; the voltage at the first terminal (CP5P) of the fifth capacitor C5 is 2VDD, and the voltage at the second terminal (CP1N) of the fifth capacitor C5 is VDD.

[0143] Correspondingly, the voltages across the first power switch S1 are both VDD, the voltages across the second power switch S2 are 0 and VDD respectively, the voltages across the third power switch S3 are both 2VDD and VDD, the voltages across the fourth power switch S4 are both VDD, the voltages across the fifth power switch S5 are both VDD and 2VDD, the voltages across the sixth power switch S6 are both VDD and 2VDD, the voltages across the seventh power switch S7 are both 2VDD, the voltages across the eighth power switch S8 are both 2VDD, and the voltages across the ninth power switch S9 are both VDD and 2VDD.

[0144] Understandable. Figure 11 The power supply circuit shown is compared to Figure 3 The power supply circuit shown in the above-mentioned 2x boost mode requires fewer power transistors to be turned on, thus reducing conduction and switching losses and improving boost efficiency.

[0145] The following are Figure 11The principle of boosting voltage by 1 is illustrated by the power supply circuit shown.

[0146] In some embodiments, see Figure 1 As shown, when the control module 11 outputs a fourth switch control signal to the combination switch module 12, the target switch mode is the fourth mode (1x mode); the combination switch module 12 is in the fourth mode based on this fourth switch control signal. For example, while the combination switch module 12 is in the fourth mode, the adjustment module 13 performs a corresponding 1x mode boost adjustment on the input voltage VDD of the power supply circuit 10, so that the output voltage VOUT of the power supply circuit 10 is 1x the input voltage VDD of the power supply circuit 10. See the following for details. Figure 14 Description:

[0147] In some embodiments, combined with Figure 11 and Figure 14 As shown, when the combination switch module 12 is in 1x mode, the eighth power switch S8 and the ninth power switch S9 are in the ON state, while the first power switch S1, the second power switch S2, the third power switch S3, the fourth power switch S4, the fifth power switch S5, the sixth power switch S6, and the seventh power switch S7 are in the OFF state. At this time, capacitors C1 through C5 are all open-circuited, and the input and output terminals are directly connected. That is, when the combination switch module 12 is in the fourth mode, the input voltage VDD of the power supply circuit 10 is equal to the output voltage VOUT of the power supply circuit 10, both being the input voltage VDD, thus achieving 1x mode boost.

[0148] Alternatively, in some other embodiments, combined with Figure 11 and Figure 14 As shown, when the combination switch module 12 is in 1x mode, the first power switch S1, the third power switch S3, the fifth power switch S5, the sixth power switch S6, the seventh power switch S7, the eighth power switch S8, and the ninth power switch S9 are in the on state, while the second power switch S2 and the fourth power switch S4 are in the off state. At this time, the first capacitor C1 to the fifth capacitor C5 are all open-circuited, and the input terminal is directly connected to the output terminal. That is, when the combination switch module 12 is in the fourth mode, the input voltage VDD of the power supply circuit 10 is equal to the output voltage VOUT of the power supply circuit 10, both being the input voltage VDD, thus realizing the boost in 1x mode.

[0149] That is, after the first power switch S1, the third power switch S3, the fifth power switch S5, the sixth power switch S6, and the seventh power switch S7 are turned on, they form a parallel relationship with the ninth power switch S9. Compared with the conduction mode of a single ninth power switch S9, the overall conduction impedance is reduced after parallel connection, which can further reduce conduction loss.

[0150] Understandable. Figure 11 The power supply circuit shown is compared to Figure 3 The power supply circuit shown can further improve the efficiency in 1x mode and 2x mode by adding a switching transistor, namely the ninth power switching transistor S9, thereby improving the overall efficiency.

[0151] In summary, the power supply circuit 10 provided in this embodiment employs eight low-voltage power switching transistors and five capacitors. Through the charging and discharging phases, it can boost the input voltage to four times its normal value, providing higher output power and output strength to the load. Furthermore, depending on the load size, the timing control of the power switching transistors allows it to operate in 1x shoot-through, 2x, 3x, or 4x boost modes, improving the boost efficiency and driving capability of the power supply circuit under different load conditions.

[0152] This application also proposes another power supply circuit 10A. For example... Figure 15 As shown, the output terminal of the power supply circuit 10A is connected to the input terminal of the load circuit 20A. The power supply circuit 10A includes a control module 11A, a combination switch module 12A, a first charge / discharge module 01, a second charge / discharge module 02, a third charge / discharge module 03, a fourth charge / discharge module 04, and a fifth charge / discharge module 05. The control module 11A is connected to the combination switch module 12A, which in turn is connected to the first charge / discharge module 01, the second charge / discharge module 02, the third charge / discharge module 03, the fourth charge / discharge module 04, and the fifth charge / discharge module 05. The control module 11A outputs a switch control signal to the combination switch module 12A, which alternately operates in the charging and discharging phases according to the switch control signal. When the combination switch module 12A is in the charging phase, the first charging / discharging module 01 charges based on the input voltage of the power supply circuit 10A, the third charging / discharging module 03 charges based on the second charging / discharging module 02, and the fifth charging / discharging module 05 charges based on the fourth charging / discharging module 04. When the combination switch module 12A is in the discharging phase, the second charging / discharging module 02 charges based on the first charging / discharging module 01, the fourth charging / discharging module 04 charges based on the third charging / discharging module 03, and the fifth charging / discharging module 05 discharges to the output terminal of the power supply circuit. The output voltage (voltage at the output terminal) of the power supply circuit 10A is four times the input voltage of the power supply circuit 10A.

[0153] It is understood that this application controls the first charging and discharging module 01 to the fifth charging and discharging module 05 to alternately be in charging and discharging state through the combination switch module 12A, which can realize the 4x boost mode of the input voltage of the power supply circuit 10 and improve the boost efficiency.

[0154] In some embodiments, the first charging / discharging module 01 to the fifth charging / discharging module 05 can each be implemented using one or more capacitors, without specific limitations. For example, the first charging / discharging module 01 includes a first capacitor, the second charging / discharging module 02 includes a second capacitor, the third charging / discharging module 03 includes a third capacitor, the fourth charging / discharging module 04 includes a fourth capacitor, and the fifth charging / discharging module 05 includes a fifth capacitor. The first to fifth capacitors switch between charging and discharging states according to their corresponding charging and discharging phases, so that the output voltage of the power supply circuit is four times the input voltage of the power supply circuit. For example, the first, second, third, fourth, and fifth capacitors included in the first charging / discharging module 01 to the fifth charging / discharging module 05 correspond to the aforementioned... Figure 2 An example of a charge pump capacitor.

[0155] For example, Figure 15 The control module 11A can be found in the aforementioned... Figure 1 Description of control module 11, Figure 15 The combined switch module 12A can be found in the aforementioned... Figure 1 Description of the combined switch module 12, Figure 15 The first charging / discharging module 01 to the fifth charging / discharging module 05 can be referred to in the above. Figure 1 Description of the adjustment module 13, Figure 15 For the medium load circuit 20A, please refer to the aforementioned Figure 1 The description of the medium load circuit 20 will not be repeated here.

[0156] In some embodiments, the combination switch module 12A includes a first power switch, a second power switch, a third power switch, a fourth power switch, a fifth power switch, a sixth power switch, a seventh power switch, and an eighth power switch. Exemplarily, the first to eighth power switches are as described above. Figure 3 The description of that will not be repeated here.

[0157] In some embodiments, the combination switch module 12A includes a first power switch, a second power switch, a third power switch, a fourth power switch, a fifth power switch, a sixth power switch, a seventh power switch, an eighth power switch, and a ninth power switch. Exemplarily, the first to ninth power switches are as described above. Figure 11 The description of that will not be repeated here.

[0158] In some embodiments, Figures 1 to 15 The power supply circuit shown can be deployed in electronic devices such as mobile phones, computers, and game controllers, without any specific restrictions.

[0159] Figure 16 According to some embodiments of this application, a schematic diagram of the structure of an electronic device 100 is shown. For example... Figure 16 As shown, the electronic device 100 includes a processor 101, a communication interface 103, and a memory 102. The processor 101, communication interface 103, and memory 102 can be interconnected via an internal bus 104, or they can communicate via wireless transmission or other means. This embodiment uses the connection via bus 104 as an example. Bus 104 can be a peripheral component interconnect express (PCIe) bus, an extended industry standard architecture (EISA) bus, a unified bus (Ubus or UB), a compute express link (CXL), a cache coherent interconnect for accelerators (CCIX), etc. Bus 104 can be divided into address bus, data bus, control bus, etc. In addition to the data bus, bus 104 can also include a power bus, a control bus, and a status signal bus. For clarity, all buses are labeled as bus 104 in the figure.

[0160] Processor 101 may consist of at least one general-purpose processor, such as a central processing unit (CPU), or a combination of a CPU and a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL), or any combination thereof. Processor 101 executes various types of digital storage instructions, such as software or firmware programs stored in memory 102, enabling electronic device 100 to provide a variety of services.

[0161] Memory 102 may include volatile memory, such as random access memory (RAM); memory 102 may also include non-volatile memory, such as read-only memory (ROM), flash memory, hard disk drive (HDD), or solid-state drive (SSD); memory 102 may also include combinations of the above types.

[0162] The communication interface 103 can be a wired interface (e.g., an Ethernet interface), an internal interface (e.g., a PCIe bus interface), a wired interface (e.g., an Ethernet interface), or a wireless interface (e.g., a cellular network interface or a wireless LAN interface), for communicating with other devices or modules.

[0163] It needs to be explained that, Figure 16 This is merely one possible implementation of the embodiments of this application. In actual applications, the electronic device 100 may include more or fewer components, which will not be elaborated here.

[0164] This application also proposes a chip that can be deployed in the aforementioned electronic device 100, and the chip has the circuitry described in any of the preceding embodiments. The chip can be an analog-to-digital converter chip, an interface chip, or a power management chip, etc.

[0165] In the accompanying drawings, some structural or methodological features may be shown in a specific arrangement and / or order. However, it should be understood that such a specific arrangement and / or order may not be necessary. Rather, in some embodiments, these features may be arranged in a manner and / or order different from that shown in the illustrative drawings. Furthermore, the inclusion of structural or methodological features in a particular figure does not imply that such features are required in all embodiments, and in some embodiments, these features may be omitted or may be combined with other features.

[0166] It should be noted that the units / modules mentioned in the various device embodiments of the present invention are all logical units / modules. Physically, a logical unit / module can be a physical unit / module, a part of a physical unit / module, or a combination of multiple physical units / modules. The physical implementation of these logical units / modules themselves is not the most important factor; the combination of functions implemented by these logical units / modules is the key to solving the technical problem proposed by the present invention. Furthermore, to highlight the innovative aspects of the present invention, the above-described device embodiments of the present invention have not introduced units / modules that are not closely related to solving the technical problem proposed by the present invention. This does not mean that the above-described device embodiments do not contain other units / modules.

[0167] It should be noted that in the examples and description of this patent, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one" does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0168] Although the invention has been illustrated and described with reference to certain preferred embodiments thereof, those skilled in the art will understand that various changes in form and detail may be made therein without departing from the scope of the invention.

Claims

1. A power supply circuit, characterized by comprising: An output terminal of the power supply circuit is connected with an input terminal of a load circuit, wherein the power supply circuit comprises a control module, a combined switch module and an adjustment module, wherein the control module is connected with the combined switch module and is configured to output a switch control signal to the combined switch module; the combined switch module is connected with the adjustment module and is configured to switch to a corresponding target switch mode according to different switch control signals; the adjustment module is configured to perform corresponding adjustment on an input voltage of the power supply circuit according to the target switch mode, and perform discharge on the output terminal of the power supply circuit based on the adjusted voltage, so that the output voltage of the power supply circuit is greater than or equal to the input voltage of the power supply circuit; wherein when the combined switch module is in different target switch modes, the output voltage of the power supply circuit is different multiples of the input voltage of the power supply circuit, and the different multiples at least include 4 times.

2. The circuit of claim 1, wherein, The adjustment module is configured to switch a charging state or a discharging state according to the target switch mode, so as to perform corresponding adjustment on the input voltage of the power supply circuit, wherein the adjustment module comprises a first capacitor, a second capacitor, a third capacitor, a fourth capacitor and a fifth capacitor.

3. The circuit of claim 2, wherein, The first capacitor, the second capacitor, the third capacitor, the fourth capacitor and the fifth capacitor are integrated in the power supply circuit, or the first capacitor, the second capacitor, the third capacitor, the fourth capacitor and the fifth capacitor are external to the power supply circuit.

4. The circuit of claim 2, wherein, The adjustment module further comprises a sixth capacitor and a seventh capacitor, wherein a first end of the sixth capacitor is connected to the input terminal of the power supply circuit, and a second end of the sixth capacitor is grounded; a first end of the seventh capacitor is connected to the output terminal of the power supply circuit, and a second end of the seventh capacitor is grounded.

5. The circuit of claim 4, wherein, The combined switch module comprises a first power switch tube, a second power switch tube, a third power switch tube, a fourth power switch tube, a fifth power switch tube, a sixth power switch tube, a seventh power switch tube and an eighth power switch tube, wherein a first end of the first power switch tube is connected to the input terminal of the power supply circuit, and a second end of the first power switch tube is connected to a first end of the first capacitor; a first end of the second power switch tube is connected to a second end of the first capacitor, a second end of the third capacitor and a second end of the fifth capacitor, and a second end of the second power switch tube is grounded; a first end of the third power switch tube is connected to a first end of the second capacitor, a second end of the second capacitor is connected to the output terminal of the power supply circuit, and a second end of the third power switch tube is connected to a first end of the third capacitor; a first end of the fourth power switch tube is connected to the input terminal of the power supply circuit, and a second end of the fourth power switch tube is connected to the first end of the second power switch tube; a first end of the fifth power switch tube is connected to the second end of the first power switch tube, and a second end of the fifth power switch tube is connected to the first end of the third power switch tube; The first end of the sixth power switch tube is connected to the second end of the third power switch tube, the second end of the sixth power switch tube is connected to the first end of the fourth capacitor, and the second end of the fourth capacitor is connected to the output end of the power supply circuit. The first end of the seventh power switch tube is connected to the second end of the sixth power switch tube, and the second end of the seventh power switch tube is connected to the first end of the fifth capacitor. The first end of the eighth power switch tube is connected to the second end of the seventh power switch tube, and the second end of the eighth power switch tube is connected to the output end of the power supply circuit.

6. The circuit of claim 5, wherein, The voltage variation range of each of the first power switch tube, the second power switch tube, the third power switch tube, the fourth power switch tube, the fifth power switch tube, the sixth power switch tube, the seventh power switch tube, and the eighth power switch tube is less than or equal to the input voltage of the power supply circuit.

7. The circuit of claim 4, wherein, The combination switch module comprises a first power switch tube, a second power switch tube, a third power switch tube, a fourth power switch tube, a fifth power switch tube, a sixth power switch tube, a seventh power switch tube, an eighth power switch tube, and a ninth power switch tube, wherein, The first end of the first power switch tube is connected to the input end of the power supply circuit, and the second end of the first power switch tube is connected to the first end of the first capacitor. The first end of the second power switch tube is connected to the second end of the first capacitor, the second end of the third capacitor, and the second end of the fifth capacitor, and the second end of the second power switch tube is grounded. The first end of the third power switch tube is connected to the first end of the second capacitor, the second end of the second capacitor is connected to the output end of the power supply circuit, and the second end of the third power switch tube is connected to the first end of the third capacitor. The first end of the fourth power switch tube is connected to the input end of the power supply circuit, and the second end of the fourth power switch tube is connected to the first end of the second power switch tube. The first end of the fifth power switch tube is connected to the second end of the first power switch tube, and the second end of the fifth power switch tube is connected to the first end of the third power switch tube. The first end of the sixth power switch tube is connected to the second end of the third power switch tube, the second end of the sixth power switch tube is connected to the first end of the fourth capacitor, and the second end of the fourth capacitor is connected to the output end of the power supply circuit. The first end of the seventh power switch tube is connected to the second end of the sixth power switch tube, and the second end of the seventh power switch tube is connected to the first end of the fifth capacitor. The first end of the eighth power switch tube is connected to the second end of the seventh power switch tube, and the second end of the eighth power switch tube is connected to the output end of the power supply circuit. The first end of the ninth power switch tube is connected to the input end of the power supply circuit, and the second end of the ninth power switch tube is connected to the second end of the seventh power switch tube.

8. The circuit of claim 7, wherein, The voltage variation range of each of the first power switch tube, the second power switch tube, the third power switch tube, the fourth power switch tube, the fifth power switch tube, the sixth power switch tube, the seventh power switch tube and the eighth power switch tube is less than or equal to the input voltage of the power supply circuit; The voltage variation range of the ninth power switch tube is greater than the input voltage of the power supply circuit.

9. The circuit of claim 5 or 6, wherein, when the switch control signal is a first switch control signal, the target switch mode is a first mode; the combination switch module is configured to alternately be in a charging phase and a discharging phase in the first mode according to the first switch control signal, wherein, when the combination switch module is in the charging phase in the first mode, the first capacitor, the third capacitor and the fifth capacitor are in a charging state, and the second capacitor, the fourth capacitor and the seventh capacitor are in a discharging state; when the combination switch module is in the discharging phase in the first mode, the first capacitor, the third capacitor and the fifth capacitor are in a discharging state, and the second capacitor, the fourth capacitor and the seventh capacitor are in a charging state; and the output voltage of the power supply circuit is 4 times the input voltage of the power supply circuit.

10. The circuit of claim 9, wherein, when the combination switch module is in the charging phase in the first mode, the first power switch tube, the second power switch tube, the third power switch tube and the seventh power switch tube are in a conducting state, and the fourth power switch tube, the fifth power switch tube, the sixth power switch tube and the eighth power switch tube are in a non-conducting state; when the combination switch module is in the discharging phase in the first mode, the fourth power switch tube, the fifth power switch tube, the sixth power switch tube and the eighth power switch tube are in a conducting state, and the first power switch tube, the second power switch tube, the third power switch tube and the seventh power switch tube are in a non-conducting state.

11. The circuit of claim 7 or 8, wherein, when the switch control signal is a first switch control signal, the target switch mode is a first mode; the combination switch module is configured to alternately be in a charging phase and a discharging phase in the first mode according to the first switch control signal, wherein, when the combination switch module is in the charging phase in the first mode, the first capacitor, the third capacitor and the fifth capacitor are in a charging state, and the second capacitor, the fourth capacitor and the seventh capacitor are in a discharging state; when the combination switch module is in the discharging phase in the first mode, the first capacitor, the third capacitor and the fifth capacitor are in a discharging state, and the second capacitor, the fourth capacitor and the seventh capacitor are in a charging state; and the output voltage of the power supply circuit is 4 times the input voltage of the power supply circuit.

12. The circuit of claim 11, wherein, when the combined switch module is in the charging phase of the first mode, the first power switch, the second power switch, the third power switch and the seventh power switch are in the on state, and the fourth power switch, the fifth power switch, the sixth power switch, the eighth power switch and the ninth power switch are in the off state; when the combined switch module is in the discharging phase of the first mode, the fourth power switch, the fifth power switch, the sixth power switch and the eighth power switch are in the on state, and the first power switch, the second power switch, the third power switch, the seventh power switch and the ninth power switch are in the off state.

13. The circuit of claim 5 or 6, wherein, when the switch control signal is a second switch control signal, the target switch mode is a second mode; the combined switch module is configured to alternately be in a charging phase and a discharging phase of the second mode according to the second switch control signal, wherein, when the combined switch module is in the charging phase of the second mode, the first capacitor, the third capacitor and the fifth capacitor are in the charging state, and the fourth capacitor and the seventh capacitor are in the discharging state; when the combined switch module is in the discharging phase of the second mode, the third capacitor and the fifth capacitor are in the discharging state, and the fourth capacitor and the seventh capacitor are in the charging state; and the output voltage of the power supply circuit is 3 times of the input voltage of the power supply circuit.

14. The circuit of claim 13, wherein, when the combined switch module is in the charging phase of the second mode, the first power switch, the second power switch, the third power switch, the fifth power switch and the seventh power switch are in the on state, and the fourth power switch, the sixth power switch and the eighth power switch are in the off state; when the combined switch module is in the discharging phase of the second mode, the fourth power switch, the sixth power switch and the eighth power switch are in the on state, and the first power switch, the second power switch, the third power switch, the fifth power switch and the seventh power switch are in the off state.

15. The circuit of claim 7 or 8, wherein, when the switch control signal is a second switch control signal, the target switch mode is a second mode; the combined switch module is configured to alternately be in a charging phase and a discharging phase of the second mode according to the second switch control signal, wherein, when the combined switch module is in the charging phase of the second mode, the first capacitor, the third capacitor and the fifth capacitor are in the charging state, and the fourth capacitor and the seventh capacitor are in the discharging state; when the combination switch module is in the discharging phase of the second mode, the third capacitor and the fifth capacitor are in a discharging state, and the fourth capacitor and the seventh capacitor are in a charging state; and the output voltage of the power supply circuit is 3 times of the input voltage of the power supply circuit.

16. The circuit of claim 15, wherein, when the combination switch module is in the charging phase of the second mode, the first power switch, the second power switch, the third power switch, the fifth power switch and the seventh power switch are in a conducting state, and the fourth power switch, the sixth power switch, the eighth power switch and the ninth power switch are in a non-conducting state; when the combination switch module is in the discharging phase of the second mode, the fourth power switch, the sixth power switch and the eighth power switch are in a conducting state, and the first power switch, the second power switch, the third power switch, the fifth power switch, the seventh power switch and the ninth power switch are in a non-conducting state.

17. The circuit of claim 5 or 6, wherein, when the switch control signal is a third switch control signal, the target switch mode is a third mode; the combination switch module is configured to alternately be in a charging phase and a discharging phase of the third mode according to the third switch control signal, wherein, when the combination switch module is in the charging phase of the third mode, the first capacitor, the third capacitor and the fifth capacitor are in a charging state, and the seventh capacitor is in a discharging state; when the combination switch module is in the discharging phase of the third mode, the fifth capacitor is in a discharging state, and the seventh capacitor is in a charging state; and the output voltage of the power supply circuit is 2 times of the input voltage of the power supply circuit.

18. The circuit of claim 17, wherein, when the combination switch module is in the charging phase of the third mode, the first power switch, the second power switch, the third power switch, the fifth power switch, the sixth power switch and the seventh power switch are in a conducting state, and the fourth power switch and the eighth power switch are in a non-conducting state; when the combination switch module is in the discharging phase of the third mode, the fourth power switch and the eighth power switch are in a conducting state, and the first power switch, the second power switch, the third power switch, the fifth power switch, the sixth power switch and the seventh power switch are in a non-conducting state.

19. The circuit of claim 5 or 6, wherein, when the switch control signal is a fourth switch control signal, the target switch mode is a fourth mode; the combination switch module is configured to be in the fourth mode according to the fourth switch control signal, wherein, When the combination switch module is in the fourth mode, the first capacitor, the second capacitor, the third capacitor, the fourth capacitor and the fifth capacitor are open-circuited, and the output voltage of the power supply circuit is 1 times of the input voltage of the power supply circuit.

20. The circuit of claim 19, wherein, When the combination switch module is in the fourth mode, the first power switch, the third power switch, the fifth power switch, the sixth power switch, the seventh power switch and the eighth power switch are in the on state, and the second power switch and the fourth power switch are in the off state.

21. The circuit of claim 7 or 8, wherein, When the switch control signal is a third switch control signal, the target switch mode is a third mode; the combination switch module is configured to alternately be in a charging phase and a discharging phase in the third mode according to the third switch control signal, wherein, When the combination switch module is in the charging phase in the third mode, the fifth capacitor is in the charging state, and the seventh capacitor is in the discharging state; When the combination switch module is in the discharging phase in the third mode, the fifth capacitor is in the discharging state, and the seventh capacitor is in the charging state; and the output voltage of the power supply circuit is 2 times of the input voltage of the power supply circuit.

22. The circuit of claim 21, wherein, When the combination switch module is in the charging phase in the third mode, the second power switch and the ninth power switch are in the on state, and the first power switch, the third power switch, the fourth power switch, the fifth power switch, the sixth power switch, the seventh power switch and the eighth power switch are in the off state; When the combination switch module is in the discharging phase in the third mode, the fourth power switch and the eighth power switch are in the on state, and the first power switch, the second power switch, the third power switch, the fifth power switch, the sixth power switch, the seventh power switch and the ninth power switch are in the off state.

23. The circuit of claim 7 or 8, wherein, When the switch control signal is a fourth switch control signal, the target switch mode is a fourth mode; the combination switch module is configured to be in the fourth mode according to the fourth switch control signal, wherein, When the combination switch module is in the fourth mode, the first capacitor, the second capacitor, the third capacitor, the fourth capacitor and the fifth capacitor are open-circuited, and the output voltage of the power supply circuit is 1 times of the input voltage of the power supply circuit.

24. The circuit of claim 23, wherein, When the combined switch module is in the fourth mode, the first, third, fifth, sixth, seventh, eighth and ninth power switch tubes are in a conducting state, and the second and fourth power switch tubes are in a non-conducting state.

25. The circuit of claim 23, wherein, When the combined switch module is in the fourth mode, the eighth and ninth power switch tubes are in a conducting state, and the first, second, third, fourth, fifth, sixth and seventh power switch tubes are in a non-conducting state.

26. A chip, characterized by The chip has the circuit as claimed in any one of claims 1 to 25 formed therein.

27. An electronic device, comprising: The electronic device comprises a chip having the circuit as claimed in any one of claims 1 to 25 formed therein. The electronic device comprises a chip having the circuit as claimed in any one of claims 1 to 25 formed therein.

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