Switched capacitor voltage converter, chip and electronic equipment

Abstract

The invention provides a switched capacitor voltage converter, a chip and electronic equipment. The switched capacitor voltage converter comprises a controller, a first transistor and at least one conversion component, the first end of the first transistor is connected with at least one conversion component, the second end is grounded, and the control end is connected with the controller; the conversion components are connected between the first end and the second end of the switched capacitor voltage converter, each conversion component comprises a capacitor and a transistor, at least one conversion component comprises a first branch circuit and a second branch circuit, and the first branch circuit and the second branch circuit share the capacitor. According to the switched capacitor voltage converter, based on charging and discharging of a capacitor at different stages and different states of a first branch and a second branch, input voltage is subjected to step-down or step-up processing. The current of the transistor in the switched capacitor voltage converter can be instantaneously zero, so that the switching loss of the transistor can be remarkably reduced. And the capacitor has no conduction loss, so that the loss of the switched capacitor voltage converter is further reduced.

Description

Technical Field

[0001] The present application relates to the field of power management chips, and in particular to a switched capacitor voltage converter, a chip and an electronic device. Background Art

[0002] In the related art, the input voltage is usually converted into an output voltage of the same or different magnitude as the input voltage through a switching power supply voltage converter. In the switching power supply voltage converter, the input voltage is boosted or bucked based on the energy storage of the inductor and the duty cycle of the transistor in the switching capacitor voltage converter. Since the equivalent resistance of the inductor is large and the inductor will generate a continuous current at the moment when the switching capacitor voltage converter is turned on or off, the loss of the switching power supply voltage converter is large. Therefore, the efficiency of the switching power supply voltage converter is limited and is not suitable for high-load application scenarios.

[0003] For example, batteries with a lower shutdown voltage are widely used in production and life due to their excellent performance. However, the battery's shutdown voltage is too low to meet the full power output of most electronic devices in electronic devices. Therefore, it is necessary to convert the voltage output of the battery with a low shutdown voltage through a switching power supply voltage converter. The voltage converted by the switching power supply voltage converter is input into the electronic device to power the electronic device.

[0004] When a switching power supply voltage converter is used to boost the voltage output by a battery with a low shutdown voltage, the loss in the switching power supply voltage converter is large due to the characteristics of the inductor. On the one hand, at the moment when the transistor in the switching power supply voltage converter is turned on or off, the inductor in the switching power supply voltage converter will generate a freewheeling current in the circuit, thereby introducing higher switching losses. On the other hand, the equivalent resistance of the inductor in the switching power supply voltage converter is large, so when the inductor is working, it will cause conduction heat loss, which limits the boost efficiency of the switching power supply voltage converter. As a result, the switching power supply voltage converter cannot supply power to electronic equipment with higher loads.

[0005] Furthermore, when the shutdown voltage of the battery with a lower shutdown voltage is further reduced, it is necessary to reduce the duty cycle of the transistor in the switching power supply voltage converter. When the duty cycle of the transistor in the switching power supply voltage converter is reduced, the current peak of the inductor will increase accordingly, resulting in higher losses during the voltage transmission process. In addition, when the duty cycle of the transistor in the switching power supply voltage converter is reduced, it is also necessary to set the inductor in the switching power supply voltage converter to a larger inductor, which further increases the losses during the voltage transmission process. Summary of the invention

[0006] The present application provides a switched capacitor voltage converter, a chip and an electronic device to solve the problem of high loss introduced by inductance in a switched power supply voltage converter.

[0007] In a first aspect, the present application provides a switched capacitor voltage converter, the switched capacitor voltage converter comprising:

[0008] A controller, a first transistor and at least one switching component;

[0009] A first terminal of the first transistor is electrically connected to at least one conversion component, a second terminal of the first transistor is grounded, and a control terminal of the first transistor is electrically connected to the controller;

[0010] The switched capacitor voltage converter comprises: a first end and a second end; a conversion component is electrically connected between the first end and the second end of the switched capacitor voltage converter, the conversion component comprises a capacitor and a plurality of transistors, at least one conversion component comprises a first branch and a second branch, and the first branch and the second branch share a capacitor;

[0011] When the switched capacitor voltage converter is boosting, in the first stage, the first branch is in a charging state, at least one conversion component is cascaded through the first transistor, the second branch is in a disconnected state, the first end of the switched capacitor voltage converter has an input voltage, and the second end of the switched capacitor voltage converter has no output voltage; in the second stage, the first branch is in a disconnected state, the second branch is in a discharging state, the first end of the switched capacitor voltage converter has an input voltage, and the second end of the switched capacitor voltage converter has an output voltage;

[0012] When the switched capacitor voltage converter steps down the voltage, in the third stage, the second branch is in a charging state, the first branch is in a disconnected state, the second end of the switched capacitor voltage converter has an input voltage, and the first end of the switched capacitor voltage converter has an output voltage; in the fourth stage, the first branch is in a discharging state, at least one conversion component is cascaded through the first transistor, the second branch is in a disconnected state, the second end of the switched capacitor voltage converter has no input voltage, and the first end of the switched capacitor voltage converter has an output voltage.

[0013] The switch capacitor voltage converter of the present application is based on the different charge and discharge states of the capacitor at different stages, and the different states of the first branch and the second branch, and performs step-down or step-up processing on the input voltage. Therefore, the switch capacitor voltage converter of the present application can have an instantaneous current of zero, so that the switch capacitor voltage converter can be a soft switch, thereby significantly reducing the switching loss in the switch capacitor voltage converter. And the capacitor in the present application has no conduction loss, which further reduces the loss of the switch capacitor voltage converter. In addition, the capacitor under unit volume can support a larger peak current, thereby effectively improving the power density of the switch capacitor voltage converter.

[0014] In a possible design, the conversion component includes: a second transistor, a third transistor, a fourth transistor and a capacitor;

[0015] A first terminal of the third transistor is electrically connected to the second terminal of the switched capacitor voltage converter, a second terminal of the third transistor is electrically connected to the first terminal of the capacitor, and a control terminal of the third transistor is electrically connected to the controller;

[0016] A first end of the fourth transistor is electrically connected to a first end of the switched capacitor voltage converter, a second end of the fourth transistor is electrically connected to a second end of the capacitor, and a control end of the fourth transistor is electrically connected to the controller;

[0017] The first end of the second transistor is electrically connected between the second end of the third transistor and the first end of the capacitor, the second end of the second transistor is electrically connected to the first end of the switched capacitor voltage converter, or the second end of the second transistor is electrically connected to an adjacent conversion component, and the control end of the second transistor is electrically connected to the controller.

[0018] In a possible design, in a first stage, the first transistor and the second transistor are turned on, the third transistor and the fourth transistor are turned off, and the capacitor is in a charging state; in a second stage, the first transistor and the second transistor are turned off, the third transistor and the fourth transistor are turned on, and the capacitor is in a discharging state;

[0019] In the third stage, the first transistor and the second transistor are turned off, the third transistor and the fourth transistor are turned on, and the capacitor is in a charging state; in the fourth stage, the first transistor and the second transistor are turned on, the third transistor and the fourth transistor are turned off, and the capacitor is in a discharging state.

[0020] In one possible design, when the number of at least one conversion component is 1, in one conversion component, the second end of the second transistor is electrically connected to the first end of the switched capacitor voltage converter;

[0021] The first terminal of the first transistor is electrically connected between the second terminal of the capacitor in a switching component and the second terminal of the fourth transistor.

[0022] In a possible design, when the number of at least one conversion component is multiple, the multiple conversion components are connected in series in sequence;

[0023] The second end of the second transistor in the first conversion component among the multiple conversion components is electrically connected to the first end of the switched capacitor voltage converter, and the second end of the second transistor in the remaining conversion components is electrically connected to the first end of the capacitor in the adjacent conversion component;

[0024] The second end of the capacitor in the last conversion component among the multiple conversion components is electrically connected to the first end of the first transistor.

[0025] In one possible design, when the switched capacitor voltage converter is boosted and the number of at least one conversion component is N, the ratio between the magnitude of the input voltage of the switched capacitor voltage converter and the magnitude of the output voltage of the switched capacitor voltage converter is N:N+1;

[0026] When the switched capacitor voltage converter steps down the voltage and the number of at least one conversion component is N, the ratio between the input voltage of the switched capacitor voltage converter and the output voltage of the switched capacitor voltage converter is N+1:N; wherein N is a positive integer.

[0027] In one possible design, the switched capacitor voltage converter further includes: a fifth transistor;

[0028] The first end of the fifth transistor is electrically connected to the first end or the second end of the switched capacitor voltage converter, the second end of the fifth transistor is electrically connected to the load, and the control end of the fifth transistor is electrically connected to the controller;

[0029] When the fifth transistor is turned on, the switched capacitor voltage converter provides a voltage to the load;

[0030] When the fifth transistor is turned off, the switched capacitor voltage converter does not provide a voltage to the load.

[0031] In one possible design, the switched capacitor voltage converter further includes: a sixth transistor;

[0032] The first end of the sixth transistor is electrically connected to the first end of the switched capacitor voltage converter, the second end of the sixth switch is electrically connected to the load, and the control end of the sixth transistor is electrically connected to the controller;

[0033] In response to a first instruction of the controller, the fifth transistor is turned off, the sixth transistor is turned on, and the switched capacitor voltage converter does not provide a voltage to the load;

[0034] In response to the second instruction of the controller, the fifth transistor is turned on, the sixth transistor is turned off, and the switched capacitor voltage converter provides a voltage to the load.

[0035] In a second aspect, the present application provides a chip, comprising: a switched capacitor voltage converter as described in any one of the above items.

[0036] In a third aspect, the present application provides an electronic device, including: the chip as described above.

[0037] The beneficial effects provided in the above-mentioned second aspect, the third aspect and the various possible designs of the above-mentioned second aspect and the third aspect can be referred to the beneficial effects brought about by the above-mentioned first aspect and the various possible implementation methods of the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 A circuit diagram of a voltage converter;

[0039] Figure 2 A schematic diagram of a structure in which a switched capacitor voltage converter provided by the first aspect of the present application is electrically connected to a load;

[0040] Figure 3 A circuit diagram of a conversion component in a switched capacitor voltage converter provided by the present application;

[0041] Figure 4 A circuit diagram of at least one conversion component when the number of conversion components in the switched capacitor voltage converter provided by the present application is 1;

[0042] Figure 5 A circuit diagram of at least one conversion component when there are multiple conversion components in the switched capacitor voltage converter provided by the present application;

[0043] Figure 6 A circuit diagram of at least one conversion component when the number of conversion components in the switched capacitor voltage converter provided by the present application is 2;

[0044] Figure 7 for Figure 6 The circuit diagram of the switched capacitor voltage converter shown is in the first stage;

[0045] Figure 8 for Figure 6 The circuit diagram of the switched capacitor voltage converter shown is in the second stage;

[0046] Fig. 9 A schematic diagram of a structure of another switched capacitor voltage converter electrically connected to a load provided by the first aspect of the present application;

[0047] Fig.10 A schematic structural diagram of another switched capacitor voltage converter electrically connected to a load provided in the first aspect of the present application. DETAILED DESCRIPTION

[0048] In this application, "at least one" means one or more, and "plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, or c alone can represent: a, b, c, a and b, a and c, or a, b, and c, where a, b, and c can be single or multiple. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0049] The directions or positional relationships indicated by terms such as "center", "longitudinal", "lateral", "up", "down", "left", "right", "front", and "back" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present application.

[0050] The terms "connected" and "connected" should be understood in a broad sense. For example, the "connected" or "connected" of a circuit structure can refer to not only physical connection, but also electrical connection or signal connection. For example, it can be directly connected, that is, physically connected, or indirectly connected through at least one intermediate element, as long as the circuit is connected, or it can be the internal connection of two elements; signal connection can refer to signal connection through a circuit or through a media medium, such as radio waves. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0051] Figure 1 A circuit diagram of a switching power supply voltage converter. Figure 1 The switching power supply voltage converter shown includes: a seventh transistor Q7, an eighth transistor Q8, a ninth transistor Q9, an inductor L, a first capacitor C01 and a second capacitor C02.

[0052] The source of the seventh transistor Q7 is electrically connected to the drain of the eighth transistor Q8, and the source of the eighth transistor Q8 is grounded. The source of the ninth transistor Q9 is electrically connected to the battery, and the drain of the ninth transistor Q9 is electrically connected to the first output terminal of the voltage converter. The first end of the second capacitor is electrically connected between the drain of the ninth transistor Q9 and the first output terminal of the voltage converter. The drain of the seventh transistor Q7 is electrically connected between the drain of the ninth transistor Q9 and the first end of the second capacitor.

[0053] The second end of the second capacitor is grounded. The first capacitor is connected in parallel with the battery. The first end of the inductor is electrically connected to the positive electrode of the battery, and the second end is electrically connected between the source of the seventh transistor Q7 and the drain of the eighth transistor Q8. The gate of the seventh transistor Q7, the gate of the eighth transistor Q8 and the gate of the ninth transistor Q9 are all electrically connected to the control circuit in the voltage converter. The first output end of the voltage converter is electrically connected to the electronic device.

[0054] When the output voltage V1 of the battery is less than the system voltage V2 required by the electronic device, the voltage converter composed of the seventh transistor Q7, the eighth transistor Q8 and the inductor L is used to boost the output voltage V1 of the battery to a voltage greater than or equal to the system voltage V2 of the electronic device. At this time, the ninth transistor Q9 is in an off state. In the process of the switching power supply voltage converter boosting the output voltage V1 of the battery to a voltage greater than or equal to the system voltage V2 of the electronic device, the seventh transistor Q7 and the eighth transistor Q8 are alternately turned on, and the voltage outputted from the first output terminal of the voltage converter can be adjusted by adjusting the conduction time of the seventh transistor Q7, that is, the duty cycle of the seventh transistor Q7.

[0055] When the output voltage V1 of the battery is smaller than the system voltage V2 required by the electronic device, the ninth transistor Q9 is turned on, and the seventh transistor Q7, the eighth transistor Q8 and the inductor L are not working, that is, the output voltage V1 of the battery is not stepped up or stepped down.

[0056] Based on Figure 1 When the switching power supply voltage converter shown performs voltage conversion, the equivalent resistance of the inductor is relatively large, and the inductor will generate a freewheeling current at the moment when the switching power supply voltage converter is turned on or off, resulting in relatively large losses in the switching power supply voltage converter.

[0057] Based on the above problems, the present application proposes a switched capacitor voltage converter, chip and electronic device. In the switched capacitor voltage converter, the voltage conversion is performed based on the charging and discharging of the capacitor, replacing the solution of voltage conversion based on inductance in the switching power supply voltage converter. Since there is no magnetic energy storage element, such as inductance, the switched capacitor voltage converter can achieve instantaneous current zero, which can significantly reduce the loss of the switched capacitor voltage converter. In addition, the capacitor will not introduce conduction loss, further enabling the switched capacitor voltage converter to achieve higher conversion efficiency.

[0058] Figure 2 A schematic diagram of a structure of a switched capacitor voltage converter electrically connected to a load provided in the first aspect of the present application. Figure 2 As shown, the switched capacitor voltage converter provided in the first aspect of the present application includes: a controller, a first transistor Q1 and at least one conversion component.

[0059] A first end of the first transistor Q1 is electrically connected to at least one conversion component, a second end of the first transistor Q1 is grounded, and a control end of the first transistor Q1 is electrically connected to the controller.

[0060] The switched capacitor voltage converter includes: a first terminal A1 and a second terminal A2; a conversion component is electrically connected between the first terminal A1 and the second terminal A2 of the switched capacitor voltage converter, the conversion component includes a capacitor Cn and a plurality of transistors, at least one conversion component includes a first branch and a second branch, and the first branch and the second branch share the capacitor Cn.

[0061] When the switched capacitor voltage converter boosts the voltage, in the first stage, the first branch is in a charging state, at least one conversion component is cascaded through the first transistor, the second branch is in a disconnected state, the first end A1 of the switched capacitor voltage converter has an input voltage, and the second end A2 of the switched capacitor voltage converter has no output voltage; in the second stage, the first branch is in a disconnected state, the second branch is in a discharging state, the first end A1 of the switched capacitor voltage converter has an input voltage, and the second end A2 of the switched capacitor voltage converter has an output voltage.

[0062] When the switched capacitor voltage converter steps down the voltage, in the third stage, the second branch is in a charging state, the first branch is in a disconnected state, the second end A2 of the switched capacitor voltage converter has an input voltage, and the first end A1 of the switched capacitor voltage converter has an output voltage; in the fourth stage, the first branch is in a discharging state, at least one conversion component is cascaded through the first transistor, the second branch is in a disconnected state, the second end A2 of the switched capacitor voltage converter has no input voltage, and the first end A1 of the switched capacitor voltage converter has an output voltage.

[0063] The switched capacitor voltage converter provided in the first aspect of the present application includes: a first branch and a second branch, and the first branch and the second branch share a capacitor Cn. The switched capacitor voltage converter provided in the first aspect of the present application is based on the different states of the control capacitor Cn, the first branch and the second branch at different stages to complete the conversion of the input voltage.

[0064] Since the switched capacitor voltage converter of the present application converts the input voltage based on the capacitor Cn, the switched capacitor voltage converter of the present application can have an instantaneous current of zero, so that the multiple transistors in the switched capacitor voltage converter can be soft switches, thereby significantly reducing the switching loss in the switched capacitor voltage converter. And the capacitor Cn in the present application has no conduction loss, further reducing the loss of the switched capacitor voltage converter. In addition, the capacitor Cn per unit volume can support a larger peak current, thereby effectively improving the power density of the switched capacitor voltage converter.

[0065] Figure 2 The switching capacitor voltage converter shown includes: a controller, a conversion component and a first transistor Q1. The controller is used to control the conversion component and the first transistor Q1 to perform step-up or step-down conversion on the input voltage connected. The first end of the first transistor Q1 is the drain of the first transistor Q1, the second end of the first transistor Q1 is the source of the first transistor Q1, and the control end of the first transistor Q1 is the gate of the first transistor Q1. The first transistor Q1 is used to form a capacitor charging and discharging loop in the first branch. For at least one conversion component cascade structure, the first branch in each conversion component is cascaded to form a loop through the first transistor.

[0066] The conversion component includes: a capacitor Cn and a plurality of transistors. The last capacitor Cn in the first branch of at least one conversion component is electrically connected to the first end of the first transistor Q1.

[0067] In the switched capacitor voltage converter of the present application, at least one conversion component includes a first branch and a second branch, and the first branch and the second branch share a capacitor Cn. One end of the first branch is electrically connected to the first end A1 of the switched capacitor voltage converter, and the other end is electrically connected to the first end of the first transistor Q1. One end of the second branch is electrically connected to the first end A1 of the switched capacitor voltage converter, and the other end is electrically connected to the second end A2 of the switched capacitor voltage converter.

[0068] When the switched capacitor voltage converter boosts the voltage, the first terminal A1 of the switched capacitor voltage converter is used as an input terminal to access the power supply voltage; the second terminal A2 of the switched capacitor voltage converter is used as an output terminal to output the boosted voltage.

[0069] In addition, when the switched capacitor voltage converter steps up or steps down the voltage, the switched capacitor voltage converter is in different stages in different phases.

[0070] When the switched capacitor voltage converter is boosting, the switched capacitor voltage converter is alternately in the first stage or the second stage. There is no requirement for the order in which the switched capacitor voltage converter is in the first stage or the second stage. That is, the switched capacitor voltage converter can be in the second stage first and then in the first stage, or the switched capacitor voltage converter can be in the first stage first and then in the second stage.

[0071] Similarly, when the switched capacitor voltage converter is stepping down, the switched capacitor voltage converter is alternately in the third stage or the fourth stage. There is no requirement for the order in which the switched capacitor voltage converter is in the third stage or the fourth stage. That is, the switched capacitor voltage converter can be in the fourth stage first and then in the third stage, or the switched capacitor voltage converter can be in the third stage first and then in the fourth stage.

[0072] The first stage is the charging stage when the switched capacitor voltage converter is boosted. In the first stage, in the switched capacitor voltage converter, the transistors in the first branch are all turned on, and the transistors in the second branch are all turned off. The capacitor Cn in the conversion component is electrically connected to the first end A1 of the switched capacitor voltage converter based on the transistor in the first branch, so that the first branch is in a charging state. The second end A2 of the switched capacitor voltage converter is electrically connected to the transistor in the second branch. Therefore, in the first stage, the first end A1 of the switched capacitor voltage converter has an input voltage, and the second end A2 of the switched capacitor voltage converter has no output voltage.

[0073] The second stage is the discharge stage when the switched capacitor voltage converter is boosted. In the second stage, in the switched capacitor voltage converter, the transistors in the second branch are all turned on, and the transistors in the first branch are all turned off. The capacitor Cn in the conversion component is electrically connected to the second end A2 of the switched capacitor voltage converter based on the transistor in the second branch, so that the second branch is in a discharge state. The first end A1 of the switched capacitor voltage converter is electrically connected to the transistor in the second branch. Therefore, in the second stage, the first end A1 of the switched capacitor voltage converter has an input voltage, and the second end A2 of the switched capacitor voltage converter has an output voltage.

[0074] When the switched capacitor voltage converter steps down the voltage, the first terminal A1 of the switched capacitor voltage converter serves as an output terminal to output the voltage after the voltage step-down process; the second terminal A2 of the switched capacitor voltage converter serves as an input terminal to access the power supply voltage.

[0075] The third stage is the charging stage when the switched capacitor voltage converter is stepping down. In the third stage, in the switched capacitor voltage converter, the transistors in the second branch are all turned on, and the transistors in the first branch are all turned off. The capacitor Cn in the conversion component is electrically connected to the second end A2 of the switched capacitor voltage converter based on the transistor in the second branch, so that the second branch is in a charging state. The first end A1 of the switched capacitor voltage converter is electrically connected to the transistor in the second branch. Therefore, in the third stage, the first end A1 of the switched capacitor voltage converter has an output voltage, and the second end A2 of the switched capacitor voltage converter has an input voltage.

[0076] The fourth stage is the discharge stage when the switched capacitor voltage converter is stepped down. In the fourth stage, in the switched capacitor voltage converter, the transistors in the first branch are all turned on, and the transistors in the second branch are all turned off. The capacitor Cn in the conversion component is electrically connected to the first end A1 of the switched capacitor voltage converter based on the transistor in the first branch, so that the first branch is in a discharge state. The second end A2 of the switched capacitor voltage converter is electrically connected to the transistor in the second branch. Therefore, in the fourth stage, the second end A2 of the switched capacitor voltage converter has no input voltage, and the first end A1 of the switched capacitor voltage converter has an output voltage.

[0077] In a switched capacitor voltage converter, the input voltage can be boosted in one time period and the input voltage can be bucked in another time period. Different operations can be performed at different times for the switched capacitor voltage converter. If the switched capacitor voltage converter is boosting, both the first and second stages need to be performed. If the switched capacitor voltage converter is bucking, both the third and fourth stages need to be performed.

[0078] Figure 3 This is a circuit diagram of a conversion component in a switched capacitor voltage converter provided by the present application. Figure 3 As shown, in a possible design of the switched capacitor voltage converter provided in the first aspect of the present application, the conversion component 2 includes: a second transistor QC, a third transistor QA, a fourth transistor QB and a capacitor Cn.

[0079] A first end of the third transistor QA is electrically connected to the second end A2 of the switched capacitor voltage converter, a second end of the third transistor QA is electrically connected to the first end of the capacitor Cn, and a control end of the third transistor QA is electrically connected to the controller.

[0080] A first end of the fourth transistor QB is electrically connected to the first end A1 of the switched capacitor voltage converter, a second end of the fourth transistor QB is electrically connected to the second end of the capacitor Cn, and a control end of the fourth transistor QB is electrically connected to the controller.

[0081] The first end of the second transistor QC is electrically connected between the second end of the third transistor QA and the first end of the capacitor Cn, the second end of the second transistor QC is electrically connected to the first end A1 of the switched capacitor voltage converter, or the second end of the second transistor QC is electrically connected to an adjacent conversion component, and the control end of the second transistor QC is electrically connected to the controller.

[0082] The conversion component includes a first terminal B1, a second terminal B2, a third terminal B3 and a fourth terminal B4. The first terminal B1 of the conversion component is electrically connected to the first terminal A1 of the switch capacitor voltage converter, and the first terminal B1 of the conversion component is the first terminal of the fourth transistor QB. The second terminal B2 of the conversion component is electrically connected to the first terminal A1 of the switch capacitor voltage converter or to an adjacent conversion component, and the second terminal B2 of the conversion component is the second terminal of the second transistor QC. The third terminal B3 of the conversion component is electrically connected to the second terminal A2 of the switch capacitor voltage converter, and the third terminal B3 of the conversion component is the first terminal of the third transistor QA; the fourth terminal B4 of the conversion component is electrically connected to the first terminal of the first transistor Q1 or to another adjacent conversion component, and the fourth terminal B4 of the conversion component is arranged between the second terminal of the fourth transistor QB and the second terminal of the capacitor Cn.

[0083] The first end of the second transistor QC is the drain of the second transistor QC, the second end of the second transistor QC is the source of the second transistor QC, and the control end of the second transistor QC is the gate of the second transistor QC; the first end of the third transistor QA is the drain of the third transistor QA, the second end of the third transistor QA is the source of the third transistor QA, and the control end of the third transistor QA is the gate of the third transistor QA; the first end of the fourth transistor QB is the drain of the fourth transistor QB, the second end of the fourth transistor QB is the source of the fourth transistor QB, and the control end of the fourth transistor QB is the gate of the fourth transistor QB; the first end of the capacitor Cn is the positive terminal of the capacitor Cn, and the second end of the capacitor Cn is the negative terminal of the capacitor Cn.

[0084] refer to Figure 4 , Figure 4 A circuit diagram of at least one conversion component when the number of conversion components in the switched capacitor voltage converter provided by the present application is 1. In a possible design of the switched capacitor voltage converter provided by the first aspect of the present application, when the number of at least one conversion component is 1, in one conversion component, the second end of the second transistor QC is electrically connected to the first end A1 of the switched capacitor voltage converter;

[0085] A first terminal of the first transistor Q1 is electrically connected between a second terminal of a capacitor Cn in a switching component and a second terminal of the fourth transistor QB.

[0086] In the switched capacitor voltage converter provided in the present application, the second transistor QC is used to connect the first end A1 of a plurality of conversion components or the switched capacitor voltage converter to form a first branch. When the number of conversion components in the switched capacitor voltage converter is 1, the first end of the second transistor QC in the conversion component is electrically connected to the first end A1 of the switched capacitor voltage converter. Electrically connecting the first end of the second transistor QC to the first end A1 of the switched capacitor voltage converter can charge the capacitor Cn based on the input voltage of the first end of the switched capacitor voltage converter when the switched capacitor voltage converter is in the first phase, or provide a voltage to the output end of the switched capacitor voltage converter based on the capacitor Cn when the switched capacitor voltage converter is in the fourth phase. The drain end of the first transistor Q1 is electrically connected to the negative end of the capacitor Cn in the conversion component.

[0087] refer to Figure 5 , Figure 5 A circuit diagram of at least one conversion component when the number of conversion components in the switched capacitor voltage converter provided by the present application is multiple. In a possible design of the switched capacitor voltage converter provided by the first aspect of the present application, when the number of at least one conversion component is multiple, the multiple conversion components are connected in series in sequence.

[0088] The second end of the second transistor QC in the first conversion component among the multiple conversion components is electrically connected to the first end A1 of the switched capacitor voltage converter, and the second ends of the second transistors QC in the remaining conversion components are electrically connected to the first end of the capacitor Cn in the adjacent conversion component.

[0089] The second end of the capacitor Cn in the last conversion component among the plurality of conversion components is electrically connected to the first end of the first transistor Q1 .

[0090] The number of conversion components in the switched capacitor voltage converter provided in the present application can be determined based on specific voltage conversion requirements. When the switched capacitor voltage converter includes multiple conversion components, the multiple conversion components are connected in series in sequence. The third ends B3 of the multiple conversion components are all electrically connected to the second end A2 of the switched capacitor voltage converter, and the first ends B1 of the multiple conversion components are all electrically connected to the first end A1 of the switched capacitor voltage converter.

[0091] In the connection direction of the multiple conversion components, the first end of the second transistor QC in the first conversion component is electrically connected to the first end A1 of the switch capacitor voltage converter. In the connection direction of the multiple conversion components, the first ends of the second transistors QC in the remaining conversion components except the first conversion component are electrically connected to the second end of the capacitor Cn of the previous conversion component. The multiple conversion components correspond to multiple second transistors QC and multiple capacitors Cn, and the multiple second transistors QC and multiple capacitors Cn form a first branch, and the first branch is output via the first transistor Q1. In the conversion component, the third transistor QA, the fourth transistor QB and the capacitor Cn form a second branch. The multiple conversion components correspond to multiple second branches.

[0092] refer to Figure 5 In one possible design, when the switched capacitor voltage converter is boosted and the number of at least one conversion component is N, the ratio between the magnitude of the input voltage of the switched capacitor voltage converter and the magnitude of the output voltage of the switched capacitor voltage converter is N:N+1.

[0093] When the switched capacitor voltage converter steps down the voltage and the number of at least one conversion component is N, the ratio between the input voltage of the switched capacitor voltage converter and the output voltage of the switched capacitor voltage converter is N+1:N; wherein N is a positive integer.

[0094] In a switched capacitor voltage converter, the number of conversion components is determined based on the target voltage and the input voltage. When the target voltage is N+1, N conversion components can be set in the switched capacitor voltage converter, and the N conversion components convert the input voltage, so that the output voltage of the switched capacitor voltage converter is N+1.

[0095] refer to Figure 5 , when the switched capacitor voltage converter includes N conversion components, there is 1 first branch, N second branches, N capacitors, and N capacitors Cn in the switched capacitor voltage converter are sequentially arranged as C11, C12, C13...CN. In the first branch, N capacitors Cn are connected in series with N second transistors QC, and the N second transistors QC are sequentially arranged as Q11C, Q12C, Q13C...QNC. When the first branch is in the off state, the N second branches are connected in parallel, and correspondingly, the N capacitors Cn in the N second branches are connected in parallel. The N second branches correspondingly include: N third transistors QA and N fourth transistors QB. The N third transistors QA are sequentially arranged as Q11A, Q12A, Q13A...QNA. The N fourth transistors QB are sequentially arranged as Q11B, Q12B, Q13B...QNB. The capacitors Cn in the first branch and the second branch in the same conversion component are the same capacitor. Wherein, n is a positive integer.

[0096] refer to Figure 5 , when the number of conversion components in the switched capacitor voltage converter is N, and the switched capacitor voltage converter boosts the voltage, in the first stage, the N series-connected capacitors Cn in the first branch are all charged. The N capacitors Cn divide the input voltage. In the second stage, the N capacitors Cn in the second branch are all discharged and superimposed with the input voltage to boost the input voltage.

[0097] refer to Figure 5 The calculation method of the switched capacitor voltage converter when boosting includes: in the first stage, N capacitors Cn divide the input voltage of the switched capacitor voltage converter, and the voltage across the N capacitors Cn is one-Nth of the input voltage of the switched capacitor voltage converter; in the second stage, the voltage generated by the discharge of the N capacitors Cn is superimposed on the input voltage of the switched capacitor voltage converter, so that the ratio of the output voltage of the switched capacitor voltage converter to the input voltage is N+1:N.

[0098] refer to Figure 5 , when the number of conversion components in the switched capacitor voltage converter is N, and the switched capacitor voltage converter is stepping down, in the third stage, the capacitors Cn in the N parallel second branches are all in a charging state. The voltages at both ends of the N parallel capacitors Cn are equal. In the fourth stage, there is no input voltage at the second end A2 of the switched capacitor voltage converter, and the N series capacitors Cn in the first branch are all in a discharging state. The first end A1 of the switched capacitor voltage converter outputs a voltage generated based on the discharge of the capacitor Cn in the first branch to step down the input voltage.

[0099] The calculation method for the switched capacitor voltage converter when stepping down the voltage includes: in the third stage, the voltage magnitudes across the N capacitors Cn are the difference between the input voltage magnitude and the output voltage magnitude of the switched capacitor voltage. In the fourth stage, the output voltage magnitude of the switched capacitor voltage converter is N times the voltage magnitude across the capacitor Cn, so that it can be calculated that the ratio of the output voltage magnitude to the input voltage magnitude of the switched capacitor voltage converter is N:N+1.

[0100] refer to Figure 5 , the first branch includes: at least one second transistor QC; the second branch includes: at least one third transistor QA and at least one fourth transistor QB; and the first branch and the second branch share a capacitor Cn.

[0101] refer to Figure 6 , Figure 6A circuit diagram of at least one conversion component when the number of conversion components in the switched capacitor voltage converter provided by the present application is 2. In a possible design of the switched capacitor voltage converter provided in the first aspect of the present application, in the first stage, the first transistor Q1 and the second transistor QC are turned on, the third transistor QA and the fourth transistor QB are turned off, and the capacitor Cn is in a charging state; in the second stage, the first transistor Q1 and the second transistor QC are turned off, the third transistor QA and the fourth transistor QB are turned on, and the capacitor Cn is in a discharging state.

[0102] refer to Figure 6 In the third stage, the first transistor Q1 and the second transistor QC are turned off, the third transistor QA and the fourth transistor QB are turned on, and the capacitor Cn is in a charging state; in the fourth stage, the first transistor Q1 and the second transistor QC are turned on, the third transistor QA and the fourth transistor QB are turned off, and the capacitor Cn is in a discharging state.

[0103] In the switched capacitor voltage converter of the present application, the controller controls the first transistor Q1 , the second transistor QC, the third transistor QA and the fourth transistor QB to be in an on or off state.

[0104] refer to Figure 6-Figure 8 , Figure 7 for Figure 6 Circuit diagram of the switched capacitor voltage converter shown in the first stage. Figure 8 for Figure 6 The circuit diagram of the second stage of the switched capacitor voltage converter is shown. Figure 6 The number of conversion components in the switched capacitor voltage converter provided in the present application is 2 as an example for illustration. The number of conversion components in the switched capacitor voltage converter includes but is not limited to the above number. The number of conversion components in the switched capacitor voltage converter can be determined based on specific needs.

[0105] exist Figure 6 In the connection direction of the two conversion components shown, the second transistor in the first conversion component is a Q21C transistor; the second transistor in the second conversion component is a Q22C transistor; the third transistor in the first conversion component is a Q21A transistor; the third transistor in the second conversion component is a Q22A transistor; the fourth transistor in the first conversion component is a Q21B transistor; the fourth transistor in the second conversion component is a Q22B transistor; the capacitor in the first conversion component is a C21 capacitor; and the capacitor in the second conversion component is a C22 capacitor.

[0106] refer to Figure 6 and Figure 7When the switched capacitor voltage converter is in the first stage of boosting, the switched capacitor voltage converter is in the first phase. The controller controls the first transistor Q1 and the second transistor QC in the two conversion components to be turned on, and controls the third transistor QA and the fourth transistor QB in the two conversion components to be turned off. That is, the following is formed: Figure 7 The conduction circuit shown.

[0107] refer to Figure 6 and Figure 7 The first terminal A1 of the switched capacitor voltage converter inputs a voltage to the capacitor Cn based on the second transistor QC, and since the positive terminal of the capacitor Cn is electrically connected to the second transistor QC, the capacitor Cn starts to charge. The second terminal A2 of the switched capacitor voltage converter is used to output a voltage, and since the second terminal A2 of the switched capacitor voltage converter is electrically connected to the third transistor QA, the switched capacitor voltage converter has no output voltage.

[0108] refer to Figure 6 and Figure 8 When the switched capacitor voltage converter is in the second stage of boosting, the switched capacitor voltage converter is in the second phase. The controller controls the first transistor Q1 and the second transistor QC in the two conversion components to be turned off, and controls the third transistor QA and the fourth transistor QB in the two conversion components to be turned on. That is, the following is formed: Figure 8 The conduction circuit shown.

[0109] refer to Figure 6 and Figure 8 , the first terminal A1 of the switched capacitor voltage converter inputs a voltage to the capacitor Cn based on the fourth transistor QB, and the second terminal A2 of the switched capacitor voltage converter receives the voltage output by the capacitor Cn based on the third transistor QA. In the first stage, the capacitor Cn is charged. In the second stage, the capacitor Cn begins to discharge. The voltage generated by the discharge of the capacitor Cn is in the same direction as the input voltage of the switched capacitor voltage converter. The voltage generated by the capacitor Cn is superimposed on the input voltage of the switched capacitor voltage converter so that the magnitude of the voltage at the output of the switched capacitor voltage converter is greater than the magnitude of the input voltage of the switched capacitor voltage converter.

[0110] When the switched capacitor voltage converter is in the third stage of step-down, the switched capacitor voltage converter is in the third phase. The controller controls the first transistor Q1 and the second transistor QC to turn off, and controls the third transistor QA and the fourth transistor QB to turn on. The first terminal A1 of the switched capacitor voltage converter outputs a voltage, and the second terminal A2 of the switched capacitor voltage converter inputs a voltage. Since the positive terminal of the capacitor Cn is connected to the second terminal A2 of the switched capacitor voltage converter via the third transistor QA, and the negative terminal of the capacitor Cn is connected to the first terminal A1 of the switched capacitor voltage converter via the fourth transistor QB, the capacitor Cn starts to charge. At this time, the switched capacitor voltage converter has an output voltage.

[0111] When the switched capacitor voltage converter is in the fourth stage of step-down, the switched capacitor voltage converter is in the fourth phase. The controller controls the first transistor Q1 and the second transistor QC to be turned on, and controls the third transistor QA and the fourth transistor QB to be turned off. Since the second terminal A2 of the switched capacitor voltage converter is used for input voltage, and the second terminal A2 of the switched capacitor voltage converter is electrically connected to the third transistor QA.

[0112] Therefore, at this time, the switched capacitor voltage converter has no input voltage. The positive terminal of the capacitor Cn is electrically connected to the second transistor QC, and the capacitor Cn begins to discharge in the fourth stage. The voltage generated by the discharge of the capacitor Cn is output to the first terminal A1 of the switched capacitor voltage converter based on the second transistor QC, so that the switched capacitor voltage converter outputs a voltage.

[0113] Since the input voltage of the switched capacitor voltage converter is the output voltage superimposed on the capacitor voltage, the capacitor is charged in the third stage and the input voltage decreases; the capacitor is discharged in the fourth stage and there is no input voltage; therefore, the voltage at the output end of the switched capacitor voltage converter is smaller than the input voltage of the switched capacitor voltage converter.

[0114] When the switched capacitor voltage converter boosts the input voltage, the first phase and the second phase are different phases in the same cycle, and in one cycle, the first phase and the second phase appear alternately. The first stage and the second stage are a boost process.

[0115] When the switched capacitor voltage converter steps down the input voltage, the third phase and the fourth phase are different phases in the same cycle, and in one cycle, the third phase and the fourth phase appear alternately. The third stage and the fourth stage are a step-down process, and initially, the controller controls the switched capacitor voltage converter to be in the third phase.

[0116] refer to Fig. 9 , Fig. 9 A schematic diagram of another structure of a switched capacitor voltage converter electrically connected to a load provided in the first aspect of the present application. In a possible design of the switched capacitor voltage converter provided in the first aspect of the present application, the switched capacitor voltage converter further includes: a fifth transistor Q5.

[0117] A first end of the fifth transistor Q5 is electrically connected to the first end A1 or the second end of the switched capacitor voltage converter, a second end of the fifth transistor Q5 is electrically connected to the load, and a control end of the fifth transistor Q5 is electrically connected to the controller.

[0118] When the fifth transistor Q5 is turned on, the switched capacitor voltage converter provides a voltage to the load.

[0119] When the fifth transistor Q5 is turned off, the switched capacitor voltage converter does not provide voltage to the load.

[0120] In a possible design of the switched capacitor voltage converter provided in the first aspect of the present application, the switched capacitor voltage converter further includes a fifth transistor Q5. The fifth transistor Q5 is used when the switched capacitor voltage converter needs to be isolated from the load, and the controller controls the fifth transistor Q5 to turn off, so that the output end of the switched capacitor voltage converter is disconnected from the load.

[0121] A source of the fifth transistor Q5 is electrically connected to the load, a drain of the fifth transistor Q5 is electrically connected to the output end of the switched capacitor voltage converter, and a gate of the fifth transistor Q5 is electrically connected to the controller.

[0122] refer to Fig.10 , Fig.10 A schematic diagram of a structure of another switched capacitor voltage converter electrically connected to a load provided in the first aspect of the present application. In a possible design of the switched capacitor voltage converter provided in the first aspect of the present application, the switched capacitor voltage converter further includes: a sixth transistor Q6.

[0123] A first end of the sixth transistor Q6 is electrically connected to the first end A1 of the switched capacitor voltage converter, a second end of the sixth transistor Q6 is electrically connected to the load, and a control end of the sixth transistor Q6 is electrically connected to the controller.

[0124] In response to the first instruction of the controller, the fifth transistor Q5 is turned off, the sixth transistor Q6 is turned on, and the switched capacitor voltage converter does not provide a voltage to the load.

[0125] In response to the second instruction of the controller, the fifth transistor Q5 is turned on, the sixth transistor Q6 is turned off, and the switched capacitor voltage converter provides a voltage to the load.

[0126] In a possible design of the switched capacitor voltage converter of the present application, the switched capacitor voltage converter further includes: a sixth transistor Q6. The sixth transistor Q6 is used for turning on the sixth transistor Q6 and turning off the fifth transistor Q5 when the voltage provided by the power supply is within the range of the voltage that the load can pass, so that the power supply voltage is connected to the load based on the sixth transistor Q6.

[0127] The source of the sixth transistor Q6 is electrically connected to the input end of the switched capacitor voltage converter, wherein the input end of the switched capacitor voltage converter may be the first end A1 of the switched capacitor voltage converter, the drain of the sixth transistor Q6 is electrically connected to the load, and the gate of the sixth transistor Q6 is electrically connected to the controller.

[0128] In the switched capacitor voltage converter, the controller determines whether to send the first instruction or the second instruction based on the magnitude of the output voltage of the power supply.

[0129] When the output voltage of the power supply is within the acceptable voltage range of the load, the controller generates a first instruction, and the fifth transistor Q5 and the sixth transistor Q6 respond to the first instruction, the fifth transistor Q5 is turned off, and the sixth transistor Q6 is turned on. At this time, the voltage provided by the power supply is connected to the load based on the sixth transistor Q6.

[0130] When the output voltage of the power supply is not within the voltage range acceptable to the load, the controller generates a second instruction. The fifth transistor Q5 is turned on based on the second instruction, and the sixth transistor Q6 is turned off based on the second instruction. At this time, the switch capacitor voltage converter is connected to the output voltage of the power supply, and the switch capacitor voltage converter converts the connected voltage, and connects the converted voltage to the load through the fifth transistor Q5 to provide voltage to the load.

[0131] Furthermore, the above description only describes the case where the fifth transistor Q5 and the sixth transistor Q6 are disposed in the switched capacitor voltage converter. In other possible designs, the fifth transistor Q5 and / or the sixth transistor Q6 may be disposed outside the switched capacitor voltage converter.

[0132] In a second aspect, the present application provides a chip, comprising: a switched capacitor voltage converter as described in any one of the above items.

[0133] In a third aspect, the present application provides an electronic device, including: the chip as described above.

[0134] Finally, it should be noted that the above embodiments are only specific implementation methods of the present application, but the protection scope of the present application is not limited thereto, and any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A switched capacitor voltage converter, characterized in that: The switched capacitor voltage converter comprises: A controller, a first transistor and at least one switching component; A first terminal of the first transistor is electrically connected to the at least one conversion component, a second terminal of the first transistor is grounded, and a control terminal of the first transistor is electrically connected to the controller; The switched capacitor voltage converter comprises: a first end and a second end; the conversion component is electrically connected between the first end and the second end of the switched capacitor voltage converter, the conversion component comprises a capacitor and a plurality of transistors, the at least one conversion component comprises a first branch and a second branch, and the first branch and the second branch share a capacitor; When the switched capacitor voltage converter is boosting, in the first stage, the first branch is in a charging state, the at least one conversion component is cascaded through the first transistor, the second branch is in a disconnected state, the first end of the switched capacitor voltage converter has an input voltage, and the second end of the switched capacitor voltage converter has no output voltage; in the second stage, the first branch is in a disconnected state, the second branch is in a discharging state, the first end of the switched capacitor voltage converter has an input voltage, and the second end of the switched capacitor voltage converter has an output voltage; When the switched capacitor voltage converter steps down the voltage, in the third stage, the second branch is in a charging state, the first branch is in a disconnected state, the second end of the switched capacitor voltage converter has an input voltage, and the first end of the switched capacitor voltage converter has an output voltage; in the fourth stage, the first branch is in a discharging state, the at least one conversion component is cascaded through the first transistor, the second branch is in a disconnected state, the second end of the switched capacitor voltage converter has no input voltage, and the first end of the switched capacitor voltage converter has an output voltage.

2. The switched capacitor voltage converter according to claim 1, wherein: The conversion component includes: a second transistor, a third transistor, a fourth transistor and a capacitor; The first end of the third transistor is electrically connected to the second end of the switched capacitor voltage converter, the second end of the third transistor is electrically connected to the first end of the capacitor, and the control end of the third transistor is electrically connected to the controller; A first end of the fourth transistor is electrically connected to a first end of the switched capacitor voltage converter, a second end of the fourth transistor is electrically connected to a second end of the capacitor, and a control end of the fourth transistor is electrically connected to the controller; The first end of the second transistor is electrically connected between the second end of the third transistor and the first end of the capacitor, the second end of the second transistor is electrically connected to the first end of the switched capacitor voltage converter, or the second end of the second transistor is electrically connected to the adjacent conversion component, and the control end of the second transistor is electrically connected to the controller.

3. The switched capacitor voltage converter according to claim 2, wherein: In the first stage, the first transistor and the second transistor are turned on, the third transistor and the fourth transistor are turned off, and the capacitor is in a charging state; in the second stage, the first transistor and the second transistor are turned off, the third transistor and the fourth transistor are turned on, and the capacitor is in a discharging state; In the third stage, the first transistor and the second transistor are turned off, the third transistor and the fourth transistor are turned on, and the capacitor is in a charging state; In the fourth stage, the first transistor and the second transistor are turned on, the third transistor and the fourth transistor are turned off, and the capacitor is in a discharging state.

4. The switched capacitor voltage converter according to claim 2, wherein: When the number of the at least one conversion component is 1, in one conversion component, the second end of the second transistor is electrically connected to the first end of the switched capacitor voltage converter; The first terminal of the first transistor is electrically connected between the second terminal of the capacitor in the one conversion component and the second terminal of the fourth transistor.

5. The switched capacitor voltage converter according to claim 2, wherein: When the number of the at least one conversion component is plural, the plurality of conversion components are sequentially connected in series; The second end of the second transistor in the first conversion component among the multiple conversion components is electrically connected to the first end of the switched capacitor voltage converter, and the second ends of the second transistors in the remaining conversion components are electrically connected to the first end of the capacitor in the adjacent conversion component; The second end of the capacitor in the last conversion component among the multiple conversion components is electrically connected to the first end of the first transistor.

6. The switched capacitor voltage converter according to claim 1, wherein: When the switched capacitor voltage converter is boosted and the number of the at least one conversion component is N, the ratio between the magnitude of the input voltage of the switched capacitor voltage converter and the magnitude of the output voltage of the switched capacitor voltage converter is N:N+1; When the switched capacitor voltage converter steps down the voltage and the number of the at least one conversion component is N, the ratio between the input voltage of the switched capacitor voltage converter and the output voltage of the switched capacitor voltage converter is N+1:N; wherein N is a positive integer.

7. The switched capacitor voltage converter according to claim 1, wherein: The switched capacitor voltage converter further includes: a fifth transistor; The first end of the fifth transistor is electrically connected to the first end or the second end of the switched capacitor voltage converter, the second end of the fifth transistor is electrically connected to the load, and the control end of the fifth transistor is electrically connected to the controller; When the fifth transistor is turned on, the switched capacitor voltage converter provides a voltage to the load; When the fifth transistor is turned off, the switched capacitor voltage converter does not provide a voltage to the load.

8. The switched capacitor voltage converter according to claim 7, wherein: The switched capacitor voltage converter further includes: a sixth transistor; The first end of the sixth transistor is electrically connected to the first end of the switched capacitor voltage converter, the second end of the sixth transistor is electrically connected to the load, and the control end of the sixth transistor is electrically connected to the controller; In response to a first instruction of the controller, the fifth transistor is turned off, the sixth transistor is turned on, and the switched capacitor voltage converter does not provide a voltage to the load; In response to a second instruction from the controller, the fifth transistor is turned on, the sixth transistor is turned off, and the switched capacitor voltage converter provides a voltage to the load.

9. A chip, characterized in that: include: A switched capacitor voltage converter as claimed in any one of claims 1 to 8.

10. An electronic device, characterized in that: include: The chip as claimed in claim 9.

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