Switched capacitor converter, chip and electronic equipment

Abstract

The invention provides a switched capacitor converter, a chip and electronic equipment. On or off of the plurality of transistors is controlled through the logic control circuit so as to change the connection relation among the first flying capacitor, the second flying capacitor and the third flying capacitor, so that the voltage conversion circuit converts the input voltage into the first output voltage and the second output voltage. Thus, the input voltage is converted into the first output voltage and the second output voltage through the three flying capacitors and the switched capacitor converter, the number of the flying capacitors and transistors in the switched capacitor converter can be reduced, and the number of components in the switched capacitor converter is reduced. Therefore, the area occupied by the switched capacitor converter can be reduced, and miniaturization development of the switched capacitor converter is facilitated. Meanwhile, the number of components in the switched capacitor converter is reduced, so that the connection relation of the components in the switched capacitor converter is simplified, and the cost of the switched capacitor converter is reduced.

Description

Technical Field

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

[0002] A switched capacitor converter (also known as a charge pump) charges and discharges a flying capacitor by controlling the transistor to turn on or off. In this way, the switched capacitor converter can convert an input voltage into a first output voltage and a second output voltage to meet load requirements.

[0003] Since a large number of components are used in a switched capacitor converter in related technologies, the switched capacitor converter occupies a large area, which is not conducive to the miniaturization development of the switched capacitor converter. Summary of the Invention

[0004] The present application provides a switched capacitor converter, a chip, and an electronic device, which can reduce the number of flying capacitors, thereby reducing the number of components in the switched capacitor converter, thereby reducing the area occupied by the switched capacitor converter, and facilitating the miniaturization of the switched capacitor.

[0005] In a first aspect, the present application provides a switched capacitor converter, the switched capacitor converter comprising: a voltage conversion circuit, wherein an input end of the voltage conversion circuit is electrically connected to an input end of the switched capacitor converter, a first output end of the voltage conversion circuit is electrically connected to a first output end of the switched capacitor converter, and a second output end of the voltage conversion circuit is electrically connected to a second output end of the switched capacitor converter; the voltage conversion circuit comprises: a plurality of transistors, a logic control circuit, a first flying capacitor, a second flying capacitor, and a third flying capacitor, wherein the control ends of the plurality of transistors are electrically connected to the logic control circuit, wherein the number of the first flying capacitor, the second flying capacitor, and the third flying capacitor is one;

[0006] the logic control circuit being configured to control the on or off states of the plurality of transistors to change the connection relationship between the first flying capacitor, the second flying capacitor, and the third flying capacitor, so that the switched capacitor converter converts the input voltage into a first output voltage and a second output voltage, wherein the input voltage is a voltage at an input terminal of the switched capacitor converter, the first output voltage is a voltage at a first output terminal of the switched capacitor converter, and the second output voltage is a voltage at a second output terminal of the switched capacitor converter;

[0007] The plurality of transistors include: a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, a seventh transistor, an eighth transistor, a ninth transistor, a tenth transistor, an eleventh transistor and a twelfth transistor;

[0008] a first terminal of the first transistor electrically connected to an input terminal of the switched capacitor converter, a second terminal of the first transistor electrically connected to a first terminal of the third transistor, a second terminal of the third transistor electrically connected to a first terminal of the sixth transistor, a second terminal of the sixth transistor electrically connected to a first terminal of the tenth transistor, a second terminal of the tenth transistor electrically connected to a first terminal of the eleventh transistor, and a second terminal of the eleventh transistor electrically connected to a first terminal of the twelfth transistor;

[0009] a first end of the second transistor electrically connected to the second end of the fourth transistor, a first end of the fourth transistor electrically connected to the first end of the seventh transistor, a second end of the seventh transistor electrically connected to the first end of the eighth transistor, and a second end of the eighth transistor electrically connected to the first end of the ninth transistor;

[0010] The first plate of the first flying capacitor and the first end of the fifth transistor are both electrically connected between the second end of the first transistor and the first end of the third transistor, the second plate of the first flying capacitor is electrically connected between the first end of the second transistor and the second end of the fourth transistor, the second end of the fifth transistor and the first plate of the second flying capacitor are both electrically connected between the first end of the fourth transistor and the first end of the seventh transistor, and the second plate of the second flying capacitor is electrically connected between the second end of the eighth transistor and the first end of the ninth transistor;

[0011] The first plate of the third flying capacitor is electrically connected between the second end of the sixth transistor and the first end of the tenth transistor, and the second plate of the third flying capacitor is electrically connected between the second end of the eleventh transistor and the first end of the twelfth transistor;

[0012] The first output terminal of the switched capacitor converter is electrically connected between the second terminal of the third transistor and the first terminal of the sixth transistor, the second terminal of the seventh transistor and the second terminal of the tenth transistor are also electrically connected to the second output terminal of the switched capacitor converter, and the second terminal of the second transistor, the second terminal of the ninth transistor and the second terminal of the twelfth transistor are all electrically connected to the ground terminal of the switched capacitor converter.

[0013] With the switched capacitor converter provided in the first aspect, the logic control circuit can control the on or off of multiple transistors to change the connection relationship between the first flying capacitor, the second flying capacitor, and the third flying capacitor, so that the voltage conversion circuit can convert the input voltage into the first output voltage and the second output voltage. In this way, the switched capacitor converter can convert the input voltage into the first output voltage and the second output voltage. In this way, the switched capacitor converter can convert the input voltage into the first output voltage and the second output voltage with only three flying capacitors, reducing the number of flying capacitors and transistors in the switched capacitor converter, and reducing the number of components in the switched capacitor converter. As a result, the area occupied by the switched capacitor converter can be reduced, which is conducive to the miniaturization of the switched capacitor converter. At the same time, due to the reduction in the number of components in the switched capacitor converter, the connection relationship of the components in the switched capacitor converter is simplified, reducing the cost of the switched capacitor converter.

[0014] In one possible design, in a first operating mode, a voltage conversion ratio among the input voltage, the first output voltage, and the second output voltage is 4:2:1, and the first operating mode is that the transistors other than the fifth transistor in the plurality of transistors switch between a first phase and a second phase;

[0015] Wherein, in the first phase and the second phase, the fifth transistor is turned off;

[0016] In the first phase, the first transistor, the fourth transistor, the eighth transistor, the tenth transistor, and the twelfth transistor are all turned on; the second transistor, the third transistor, the sixth transistor, the seventh transistor, the ninth transistor, and the eleventh transistor are all turned off;

[0017] In the second phase, the first transistor, the fourth transistor, the eighth transistor, the tenth transistor, and the twelfth transistor are all turned off; the second transistor, the third transistor, the sixth transistor, the seventh transistor, the ninth transistor, and the eleventh transistor are all turned on.

[0018] In one possible design, in a second operating mode, a voltage conversion ratio among the input voltage, the first output voltage, and the second output voltage is 3:2:1, and the second operating mode is that the plurality of transistors switch between a first phase and a second phase;

[0019] Wherein, in the first phase, the first transistor, the fourth transistor, the seventh transistor, the ninth transistor, the tenth transistor and the twelfth transistor are all turned on; the second transistor, the third transistor, the fifth transistor, the sixth transistor, the eighth transistor and the eleventh transistor are all turned off;

[0020] In the second phase, the first transistor, the fourth transistor, the seventh transistor, the ninth transistor, the tenth transistor and the twelfth transistor are all turned off; the second transistor, the third transistor, the fifth transistor, the sixth transistor, the eighth transistor and the eleventh transistor are all turned on.

[0021] In one possible design, in a third operating mode, a voltage conversion ratio among the input voltage, the first output voltage, and the second output voltage is 2:2:1, and in the first operating mode, the transistors other than the first transistor, the second transistor, the third transistor, and the fourth transistor among the plurality of transistors switch between a first phase and a second phase;

[0022] Wherein, in the first phase and the second phase, the first transistor and the third transistor are both turned on, and the second transistor and the fourth transistor are both turned off;

[0023] In the first phase, the fifth transistor, the eighth transistor, the tenth transistor, and the twelfth transistor are all turned on; the sixth transistor, the seventh transistor, the ninth transistor, and the eleventh transistor are all turned off;

[0024] In the second phase, the fifth transistor, the eighth transistor, the tenth transistor, and the twelfth transistor are all turned off; and the sixth transistor, the seventh transistor, the ninth transistor, and the eleventh transistor are all turned on.

[0025] In one possible design, in a fourth operating mode, a voltage conversion ratio among the input voltage, the first output voltage, and the second output voltage is 1:1:1;

[0026] In the fourth operating mode, the first transistor, the third transistor, the fifth transistor, the sixth transistor, the seventh transistor and the tenth transistor are all turned on; the second transistor, the fourth transistor, the eighth transistor, the ninth transistor, the eleventh transistor and the twelfth transistor are all turned off.

[0027] In one possible design, the number of the voltage conversion circuits is at least 2, the input end of each of the voltage conversion circuits is electrically connected to the input end of the switched capacitor converter, the first output end of each of the voltage conversion circuits is electrically connected to the first output end of the switched capacitor converter, the second output end of each of the voltage conversion circuits is electrically connected to the second output end of the switched capacitor converter, and the voltage conversion circuits are connected in parallel.

[0028] In one possible design, the switched capacitor converter further includes: a first output capacitor and a second output capacitor;

[0029] The first plate of the first output capacitor is electrically connected to the first output terminal of the switched capacitor converter, the first plate of the second output capacitor is electrically connected to the second output terminal of the switched capacitor converter, and the second plate of the first output capacitor and the second plate of the second output capacitor are both electrically connected to the ground terminal of the switched capacitor converter.

[0030] In a second aspect, the present application provides a switched capacitor converter chip, comprising: the switched capacitor converter in the above-mentioned first aspect and any possible design of the first aspect.

[0031] The beneficial effects provided in the above-mentioned second aspect and the various possible designs of the above-mentioned second 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.

[0032] In a third aspect, the present application provides an electronic device, comprising: the switched capacitor conversion chip in the above-mentioned second aspect and any possible design of the second aspect.

[0033] The above description is only an overview of the technical solutions of the embodiments of the present application. In order to more clearly understand the technical means of the embodiments of the present application, they can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiments of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present application, a brief introduction will be given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0035] Figure 1 Schematic diagram of the structure of a switched capacitor converter in the related art;

[0036] Figure 2A schematic structural diagram of a switched capacitor converter provided in one embodiment of the present application;

[0037] Figure 3 A schematic structural diagram of a first operating mode of a switched capacitor converter provided in one embodiment of the present application;

[0038] Figure 4 A schematic structural diagram of a first operating mode of another switched capacitor converter provided in an embodiment of the present application;

[0039] Figure 5 for Figure 3 The equivalent circuit diagram of the switched capacitor converter shown in FIG.

[0040] Figure 6 for Figure 4 The equivalent circuit diagram of the switched capacitor converter shown in FIG.

[0041] Figure 7 A schematic structural diagram of a second operating mode of a switched capacitor converter provided in one embodiment of the present application;

[0042] Figure 8 A schematic structural diagram of a second operating mode of another switched capacitor converter provided in an embodiment of the present application;

[0043] Figure 9 for Figure 7 The equivalent circuit diagram of the switched capacitor converter shown in FIG.

[0044] Figure 10 for Figure 8 The equivalent circuit diagram of the switched capacitor converter shown in FIG.

[0045] Figure 11 A schematic structural diagram of a third operating mode of a switched capacitor converter provided in an embodiment of the present application;

[0046] Figure 12 A schematic structural diagram of a third operating mode of another switched capacitor converter provided in an embodiment of the present application;

[0047] Figure 13 for Figure 11 The equivalent circuit diagram of the switched capacitor converter shown in FIG.

[0048] Figure 14 for Figure 12 The equivalent circuit diagram of the switched capacitor converter shown in FIG.

[0049] Figure 15 A schematic structural diagram of a fourth operating mode of a switched capacitor converter provided in an embodiment of the present application;

[0050] Figure 16 for Figure 15 The equivalent circuit diagram of the switched capacitor converter shown in FIG.

[0051] Figure 17 A schematic structural diagram of another switched capacitor converter provided in an embodiment of the present application. DETAILED DESCRIPTION

[0052] In this application, "at least one" refers to one or more, and "plurality" refers to 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: the existence of A alone, the existence of A and B at the same time, and the existence of B alone, where A and B can be singular or plural. The character " / " generally indicates that the objects associated 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 or plural items. For example, at least one of a alone, b alone, or c alone can represent: a alone, b alone, c alone, a and b in combination, a and c in combination, b and c in combination, or a, b, and c in combination, where a, b, and c can be single or multiple. In addition, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance.

[0053] 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. Therefore, they should not be understood as limiting the present application.

[0054] The terms "connected" and "connect" should be interpreted broadly. For example, "connected" or "connected" in a circuit structure can refer not only to a physical connection, but also to an electrical connection or a signal connection. For example, it can be a direct connection, i.e., a physical connection, or an indirect connection through at least one intermediate component, as long as the circuit is interconnected. It can also refer to internal connectivity between two components. Signal connection can refer not only to signal connection through circuits but also to signal connection through media, such as radio waves. Those skilled in the art will understand the specific meanings of the above terms in this application on a case-by-case basis.

[0055] Reference Figure 1 , Figure 1 FIG. 1 is a schematic diagram of the structure of a switched capacitor converter in the related art. Figure 1As shown, the switched capacitor converter in the related art may include: transistor K1, transistor K2, transistor K3, transistor K4, transistor K5, transistor K6, transistor K7, transistor K8, transistor K9, transistor K10, transistor K11, transistor K12, transistor K13, transistor K14, transistor K15 and transistor K16, as well as flying capacitor CF1A', flying capacitor CF2A' and flying capacitor CF2B'.

[0056] In related art, a switched capacitor converter requires 16 transistors and four flying capacitors, resulting in a large number of components. This results in a larger area occupied by the switched capacitor converter, hindering its miniaturization. Furthermore, the large number of components used in the switched capacitor converter complicates the connection relationships among the components, increasing the cost of the switched capacitor converter.

[0057] To solve the above problems, the present application provides a switched capacitor converter, a chip, and an electronic device.

[0058] In this application, electronic devices may include but are not limited to portable devices, audio devices, wireless communication devices, and automotive electronics.

[0059] Reference Figure 2 , Figure 2 This is a schematic diagram of the structure of a switched capacitor converter provided by an embodiment of the present application. Figure 2 As shown, the switched capacitor converter 1000 may include: a voltage conversion circuit 100, the input end of the voltage conversion circuit 100 is electrically connected to the input end of the switched capacitor converter 1000, the first output end of the voltage conversion circuit 100 is electrically connected to the first output end of the switched capacitor converter 1000, and the second output end of the voltage conversion circuit 100 is electrically connected to the second output end of the switched capacitor converter 1000.

[0060] The voltage conversion circuit 100 may include: a plurality of transistors 110, a first flying capacitor CF1, a second flying capacitor CF2, and a third flying capacitor CF3. The control terminals of the plurality of transistors 110 are all electrically connected to the logic control circuit.

[0061] The plurality of transistors 110 , the first flying capacitor CF1 , the second flying capacitor CF2 and the third flying capacitor CF3 may be integrated or separately provided, and may be specifically provided according to actual needs.

[0062] The number of the first flying capacitor CF1 , the second flying capacitor CF2 and the third flying capacitor CF3 are all one.

[0063] The logic control circuit is used to drive the transistors in the plurality of transistors 110 to be turned on or off.

[0064] The control signal corresponding to the logic control circuit can be an on-control signal or an off-control signal. When the control signal is an on-control signal, the logic control circuit can drive the corresponding transistor to turn on. When the control signal is an off-control signal, the logic control circuit can drive the corresponding transistor to turn off.

[0065] The plurality of transistors 110 are used to control the connection relationship among the first flying capacitor CF1 , the second flying capacitor CF2 and the third flying capacitor CF3 , so that the switched capacitor converter 1000 converts the input voltage VIN into the first output voltage VO1 and the second output voltage VO2 .

[0066] The input voltage VIN is the voltage at the input end of the switched capacitor converter 1000 , the first output voltage VO1 is the voltage at the first output end of the switched capacitor converter 1000 , and the second output voltage VO2 is the voltage at the second output end of the switched capacitor converter 1000 .

[0067] In some embodiments, as Figure 2 As shown, the plurality of transistors 110 may include: a first transistor Q1, a second transistor Q2, a third transistor Q3, a fourth transistor Q4, a fifth transistor Q5, a sixth transistor Q6, a seventh transistor Q7, an eighth transistor Q8, a ninth transistor Q9, a tenth transistor Q10, an eleventh transistor Q11 and a twelfth transistor Q12.

[0068] A first end of the first transistor Q1 is electrically connected to an input end of the switched capacitor converter 1000, a second end of the first transistor Q1 is electrically connected to a first end of the third transistor Q3, a second end of the third transistor Q3 is electrically connected to a first end of the sixth transistor Q6, a second end of the sixth transistor Q6 is electrically connected to a first end of the tenth transistor Q10, a second end of the tenth transistor Q10 is electrically connected to a first end of the eleventh transistor Q11, and a second end of the eleventh transistor Q11 is electrically connected to a first end of the twelfth transistor Q12.

[0069] A first end of the second transistor Q2 is electrically connected to a second end of the fourth transistor Q4, a first end of the fourth transistor Q4 is electrically connected to a first end of the seventh transistor Q7, a second end of the seventh transistor Q7 is electrically connected to a first end of the eighth transistor Q8, and a second end of the eighth transistor Q8 is electrically connected to a first end of the ninth transistor Q9.

[0070] The first plate of the first flying capacitor CF1 and the first end of the fifth transistor Q5 are both electrically connected between the second end of the first transistor Q1 and the first end of the third transistor Q3. The second plate of the first flying capacitor CF1 is electrically connected between the first end of the second transistor Q2 and the second end of the fourth transistor Q4. The second end of the fifth transistor Q5 and the first plate of the second flying capacitor CF2 are both electrically connected between the first end of the fourth transistor Q4 and the first end of the seventh transistor Q7. The second plate of the second flying capacitor CF2 is electrically connected between the second end of the eighth transistor Q8 and the first end of the ninth transistor Q9.

[0071] A first plate of the third flying capacitor CF3 is electrically connected between the second end of the sixth transistor Q6 and the first end of the tenth transistor Q10 , and a second plate of the third flying capacitor CF3 is electrically connected between the second end of the eleventh transistor Q11 and the first end of the twelfth transistor Q12 .

[0072] The first output terminal of the switched capacitor converter 1000 is electrically connected between the second terminal of the third transistor Q3 and the first terminal of the sixth transistor Q6. The second terminal of the seventh transistor Q7 and the second terminal of the tenth transistor Q10 are also electrically connected to the second output terminal of the switched capacitor converter 1000. The second terminal of the second transistor Q2, the second terminal of the ninth transistor Q9, and the second terminal of the twelfth transistor Q12 are all electrically connected to the ground terminal of the switched capacitor converter.

[0073] Among them, the first transistor Q1, the second transistor Q2, the third transistor Q3, the fourth transistor Q4, the fifth transistor Q5, the sixth transistor Q6, the seventh transistor Q7, the eighth transistor Q8, the ninth transistor Q9, the tenth transistor Q10, the eleventh transistor Q11 and the twelfth transistor Q12 can be integrated or separately arranged, and can be specifically arranged according to actual needs.

[0074] Among them, the first transistor Q1, the second transistor Q2, the third transistor Q3, the fourth transistor Q4, the fifth transistor Q5, the sixth transistor Q6, the seventh transistor Q7, the eighth transistor Q8, the ninth transistor Q9, the tenth transistor Q10, the eleventh transistor Q11 and the twelfth transistor Q12 may include but are not limited to gallium nitride transistors, metal-oxide semiconductor field-effect transistors, field-controlled thyristors and gate turn-off thyristors.

[0075] For example, when the first transistor Q1, the second transistor Q2, the third transistor Q3, the fourth transistor Q4, the fifth transistor Q5, the sixth transistor Q6, the seventh transistor Q7, the eighth transistor Q8, the ninth transistor Q9, the tenth transistor Q10, the eleventh transistor Q11, and the twelfth transistor Q12 are gallium nitride transistors, the control end of the first transistor Q1, the control end of the second transistor Q2, the control end of the third transistor Q3, the control end of the fourth transistor Q4, the control end of the fifth transistor Q5, the control end of the sixth transistor Q6, the control end of the seventh transistor Q7, the control end of the eighth transistor Q8, the control end of the ninth transistor Q9, the control end of the tenth transistor Q10, the control end of the eleventh transistor Q11, and the control end of the twelfth transistor Q12 refer to the gates of the gallium nitride transistors, and the first end of the first transistor Q1, the first end of the second transistor Q2, the third transistor Q9, the control end of the eleventh transistor Q10, the control end of the eleventh transistor Q11, and the control end of the twelfth transistor Q12 refer to the gates of the gallium nitride transistors. The first end of Q3, the first end of the fourth transistor Q4, the first end of the fifth transistor Q5, the first end of the sixth transistor Q6, the first end of the seventh transistor Q7, the first end of the eighth transistor Q8, the first end of the ninth transistor Q9, the first end of the tenth transistor Q10, the first end of the eleventh transistor Q11, and the first end of the twelfth transistor Q12 may be drains or sources of the gallium nitride transistors. Correspondingly, the second end of the first transistor Q1, the second end of the second transistor Q2, the second end of the third transistor Q3, the second end of the fourth transistor Q4, the second end of the fifth transistor Q5, the second end of the sixth transistor Q6, the second end of the seventh transistor Q7, the second end of the eighth transistor Q8, the second end of the ninth transistor Q9, the second end of the tenth transistor Q10, the second end of the eleventh transistor Q11, and the second end of the twelfth transistor Q12 may be sources or drains of the gallium nitride transistors.

[0076] For example, when the first transistor Q1, the second transistor Q2, the third transistor Q3, the fourth transistor Q4, the fifth transistor Q5, the sixth transistor Q6, the seventh transistor Q7, the eighth transistor Q8, the ninth transistor Q9, the tenth transistor Q10, the eleventh transistor Q11 and the twelfth transistor Q12 are metal-oxide semiconductor field-effect transistors, the control end of the first transistor Q1, the control end of the second transistor Q2, the control end of the third transistor Q3, the control end of the fourth transistor Q4, the control end of the fifth transistor Q5, the control end of the sixth transistor Q6, the control end of the seventh transistor Q7, the control end of the eighth transistor Q8, the control end of the ninth transistor Q9, the control end of the tenth transistor Q10, the control end of the eleventh transistor Q11 and the control end of the twelfth transistor Q12 refer to the gates of the metal-oxide semiconductor field-effect transistors, and the first end of the first transistor Q1, the first end of the second transistor Q2, the third transistor Q9 ... The first end of Q3, the first end of the fourth transistor Q4, the first end of the fifth transistor Q5, the first end of the sixth transistor Q6, the first end of the seventh transistor Q7, the first end of the eighth transistor Q8, the first end of the ninth transistor Q9, the first end of the tenth transistor Q10, the first end of the eleventh transistor Q11, and the first end of the twelfth transistor Q12 may be drains or sources of metal-oxide semiconductor field-effect transistors, and correspondingly, the second end of the first transistor Q1, the second end of the second transistor Q2, the second end of the third transistor Q3, the second end of the fourth transistor Q4, the second end of the fifth transistor Q5, the second end of the sixth transistor Q6, the second end of the seventh transistor Q7, the second end of the eighth transistor Q8, the second end of the ninth transistor Q9, the second end of the tenth transistor Q10, the second end of the eleventh transistor Q11, and the second end of the twelfth transistor Q12 may be sources or drains of metal-oxide semiconductor field-effect transistors.

[0077] For example, when the first transistor Q1, the second transistor Q2, the third transistor Q3, the fourth transistor Q4, the fifth transistor Q5, the sixth transistor Q6, the seventh transistor Q7, the eighth transistor Q8, the ninth transistor Q9, the tenth transistor Q10, the eleventh transistor Q11 and the twelfth transistor Q12 are field-controlled thyristors, the control end of the first transistor Q1, the control end of the second transistor Q2, the control end of the third transistor Q3, the control end of the fourth transistor Q4, the control end of the fifth transistor Q5, the control end of the sixth transistor Q6, the control end of the seventh transistor Q7, the control end of the eighth transistor Q8, the control end of the ninth transistor Q9, the control end of the tenth transistor Q10, the control end of the eleventh transistor Q11 and the control end of the twelfth transistor Q12 refer to the gates of the field-controlled thyristors, and the first end of the first transistor Q1, the first end of the second transistor Q2, the third transistor Q3, the fourth transistor Q4, the control end of the fifth transistor Q5, the control end of the sixth transistor Q6, the control end of the seventh transistor Q7, the control end of the eighth transistor Q8, the control end of the ninth transistor Q9, the control end of the tenth transistor Q10, the control end of the eleventh transistor Q11 and the control end of the twelfth transistor Q12 refer to the gates of the field-controlled thyristors, and the first end of the first transistor Q1, the first end of the second transistor Q2, the third transistor Q9 The first end of Q3, the first end of the fourth transistor Q4, the first end of the fifth transistor Q5, the first end of the sixth transistor Q6, the first end of the seventh transistor Q7, the first end of the eighth transistor Q8, the first end of the ninth transistor Q9, the first end of the tenth transistor Q10, the first end of the eleventh transistor Q11, and the first end of the twelfth transistor Q12 can be the drain or source of the field-controlled thyristor, and correspondingly, the second end of the first transistor Q1, the second end of the second transistor Q2, the second end of the third transistor Q3, the second end of the fourth transistor Q4, the second end of the fifth transistor Q5, the second end of the sixth transistor Q6, the second end of the seventh transistor Q7, the second end of the eighth transistor Q8, the second end of the ninth transistor Q9, the second end of the tenth transistor Q10, the second end of the eleventh transistor Q11, and the second end of the twelfth transistor Q12 can be the source or drain of the field-controlled thyristor.

[0078] like Figure 2 As shown, the first end of the first transistor Q1 is the input end of the voltage conversion circuit 100, the first output end of the voltage conversion circuit 100 is located between the second end of the third transistor Q3 and the first end of the sixth transistor Q6, and the second output end of the voltage conversion circuit 100 is located between the second end of the seventh transistor Q7 and the second end of the tenth transistor Q10.

[0079] The second plate of the first flying capacitor CF1 is electrically connected to the first plate of the second flying capacitor CF2 via the fourth transistor Q4. The second plate of the first flying capacitor CF1 is also electrically connected to the second plate of the second flying capacitor CF2 via the fourth transistor Q4, the seventh transistor Q7, and the eighth transistor Q8. Thus, by controlling the on / off states of the fourth transistor Q4, the seventh transistor Q7, and the eighth transistor Q8, the first flying capacitor CF1 and the second flying capacitor CF2 can be controlled to be connected in series or in parallel.

[0080] The first plate of the first flying capacitor CF1 is electrically connected to the first plate of the third flying capacitor CF3 via the third transistor Q3 and the sixth transistor Q6. The first plate of the first flying capacitor CF1 is also electrically connected to the second plate of the third flying capacitor CF3 via the third transistor Q3, the sixth transistor Q6, the tenth transistor Q10, and the eleventh transistor Q11. Thus, by controlling the on / off states of the third transistor Q3, the sixth transistor Q6, the tenth transistor Q10, and the eleventh transistor Q11, the first flying capacitor CF1 and the third flying capacitor CF3 can be controlled to be connected in series or in parallel.

[0081] The first plate of the second flying capacitor CF2 is electrically connected to the first plate of the third flying capacitor CF3 via the fifth transistor Q5, the third transistor Q3, and the sixth transistor Q6. The first plate of the second flying capacitor CF2 is also electrically connected to the second plate of the third flying capacitor CF3 via the seventh transistor Q7 and the eleventh transistor Q11. Thus, by controlling the on / off states of the fifth transistor Q5, the third transistor Q3, the sixth transistor Q6, the seventh transistor Q7, and the eleventh transistor Q11, the second flying capacitor CF2 and the third flying capacitor CF3 can be controlled to be connected in series or in parallel.

[0082] In summary, by controlling the on / off states of each of the multiple transistors 110, the connection relationship between the first fly capacitor CF1, the second fly capacitor CF2, and the third fly capacitor CF3 can be controlled. Thus, by controlling the connection relationship between the first fly capacitor CF1, the second fly capacitor CF2, and the third fly capacitor CF3, after the input voltage VIN is input to the input terminal of the voltage conversion circuit 100, the voltage conversion circuit 100 can convert the input voltage VIN into the first output voltage VO1 and the second output voltage VO2 using only the three fly capacitors. Consequently, the switched capacitor converter 1000 can convert the input voltage VIN into the first output voltage VO1 and the second output voltage VO2.

[0083] The plurality of transistors 110 comprises a total of 12 transistors, which can reduce the number of transistors in the switched capacitor converter 1000 and significantly reduce the number of components in the switched capacitor converter 1000. This can significantly reduce the area occupied by the switched capacitor converter, further facilitating the miniaturization of the switched capacitor converter. Furthermore, the significant reduction in the number of components in the switched capacitor converter greatly simplifies the connection relationships among the components, significantly reducing the cost of the switched capacitor converter.

[0084] For example, when the first transistor Q1, the fourth transistor Q4, the eighth transistor Q8, the tenth transistor Q10 and the twelfth transistor Q12 are all turned on and the second transistor Q2, the third transistor Q3, the sixth transistor Q6, the seventh transistor Q7, the ninth transistor Q9 and the eleventh transistor Q11 are all turned off, the first flying capacitor CF1 and the second flying capacitor CF2 are connected in series, and the series-connected first flying capacitor CF1 and the second flying capacitor CF2 are connected in parallel with the third flying capacitor CF3.

[0085] The switched capacitor converter provided by the present application can control the conduction or shutdown of multiple transistors through a logic control circuit to change the connection relationship between the first flying capacitor, the second flying capacitor and the third flying capacitor, so that the voltage conversion circuit can convert the input voltage into the first output voltage and the second output voltage. In this way, the switched capacitor converter can convert the input voltage into the first output voltage and the second output voltage. In this way, the switched capacitor converter can convert the input voltage into the first output voltage and the second output voltage with the help of only three flying capacitors, which can reduce the number of flying capacitors and transistors in the switched capacitor converter and reduce the number of components in the switched capacitor converter. Thus, the area occupied by the switched capacitor converter can be reduced, which is conducive to the miniaturization development of the switched capacitor converter. At the same time, due to the reduction in the number of components in the switched capacitor converter, the connection relationship of the components in the switched capacitor converter is simplified, reducing the cost of the switched capacitor converter.

[0086] The following combination Figure 3-Figure 6 The specific implementation of the switched capacitor converter 1000 in the first operating mode is described in detail.

[0087] Reference Figure 3 and Figure 4 , Figure 3 This is a structural diagram of a first operating mode of a switched capacitor converter provided by an embodiment of the present application. Figure 4 This is a structural diagram of another switched capacitor converter in the first working mode provided by an embodiment of the present application. Figure 3 and Figure 4 As shown, in the first operating mode, the other transistors in the plurality of transistors 110 except the fifth transistor Q5 are switched between the first phase and the second phase, so that the voltage conversion ratio between the input voltage VIN, the first output voltage VO1 and the second output voltage VO2 is 4:2:1.

[0088] In the first phase and the second phase, the fifth transistor Q5 is turned off, that is, the fifth transistor Q5 is always in the off state.

[0089] like Figure 3As shown, in the first phase, the first transistor Q1, the fourth transistor Q4, the eighth transistor Q8, the tenth transistor Q10 and the twelfth transistor Q12 are all turned on, and the second transistor Q2, the third transistor Q3, the sixth transistor Q6, the seventh transistor Q7, the ninth transistor Q9 and the eleventh transistor Q11 are all turned off.

[0090] like Figure 4 As shown, in the second phase, the first transistor Q1, the fourth transistor Q4, the eighth transistor Q8, the tenth transistor Q10 and the twelfth transistor Q12 are all turned off, and the second transistor Q2, the third transistor Q3, the sixth transistor Q6, the seventh transistor Q7, the ninth transistor Q9 and the eleventh transistor Q11 are all turned on.

[0091] For example, Figure 3 As shown, the first transistor Q1 is turned on and the third transistor Q3 is turned off, then the first plate of the first flying capacitor CF1 is connected to the input end of the switched capacitor converter 1000, and the first plate of the first flying capacitor CF1 is disconnected from the first output end of the switched capacitor converter 1000; the fourth transistor Q4 is turned on and the seventh transistor Q7 is turned off, then the second plate of the first flying capacitor CF1 is connected to the first plate of the second flying capacitor CF2, and the second plate of the first flying capacitor CF1 is disconnected from the second output end of the switched capacitor converter 1000; the eighth transistor Q8 is turned on and the ninth transistor Q9 is turned off, then the second plate of the second flying capacitor CF2 is connected to the output end of the switched capacitor converter 1000. The second output terminal is turned on, and the second plate of the second flying capacitor CF2 is disconnected from the ground terminal of the switched capacitor converter 1000; the sixth transistor Q6 is turned off and the tenth transistor Q10 is turned on, then the first plate of the third flying capacitor CF3 is turned on and the second output terminal of the switched capacitor converter 1000, and the first plate of the third flying capacitor CF3 is disconnected from the first output terminal of the switched capacitor converter 1000; the eleventh transistor Q11 is turned off and the twelfth transistor Q12 is turned on, then the second plate of the third flying capacitor CF3 is turned on and the ground terminal of the switched capacitor converter 1000, and the second plate of the third flying capacitor CF3 is disconnected from the second output terminal of the switched capacitor converter 1000.

[0092] Thus, in the first phase, the equivalent circuit of the switched capacitor converter 1000 can be as follows: Figure 5As shown, the first flying capacitor CF1 and the second flying capacitor CF2 are connected in series between the input terminal of the switched capacitor converter 1000 and the second output terminal of the switched capacitor converter 1000, and the third flying capacitor CF3 is electrically connected between the second output terminal of the switched capacitor converter 1000 and the ground terminal of the switched capacitor converter 1000. In other words, the first flying capacitor CF1 and the second flying capacitor CF2 are connected in series, and the series-connected first flying capacitor CF1 and the second flying capacitor CF2 are connected in parallel with the third flying capacitor CF3.

[0093] For example, Figure 4 As shown, the first transistor Q1 is turned off and the third transistor Q3 is turned on, then the first plate of the first flying capacitor CF1 is disconnected from the input terminal of the switched capacitor converter 1000, and the first plate of the first flying capacitor CF1 is connected to the first output terminal of the switched capacitor converter 1000; the fourth transistor Q4 is turned off and the seventh transistor Q7 is turned on, then the second plate of the first flying capacitor CF1 is disconnected from the first plate of the second flying capacitor CF2, and the second plate of the first flying capacitor CF1 is connected to the second output terminal of the switched capacitor converter 1000; the eighth transistor Q8 is turned off and the ninth transistor Q9 is turned on, then the second plate of the second flying capacitor CF2 is disconnected from the input terminal of the switched capacitor converter 1000, and the second plate of the first flying capacitor CF1 is connected to the second output terminal of the switched capacitor converter 1000. The second output terminal is disconnected, and the second plate of the second flying capacitor CF2 is connected to the ground terminal of the switched capacitor converter 1000; the sixth transistor Q6 is turned on and the tenth transistor Q10 is turned off, then the first plate of the third flying capacitor CF3 is disconnected from the second output terminal of the switched capacitor converter 1000, and the first plate of the third flying capacitor CF3 is connected to the first output terminal of the switched capacitor converter 1000; the eleventh transistor Q11 is turned on and the twelfth transistor Q12 is turned off, then the second plate of the third flying capacitor CF3 is disconnected from the ground terminal of the switched capacitor converter 1000, and the second plate of the third flying capacitor CF3 is connected to the second output terminal of the switched capacitor converter 1000.

[0094] Thus, in the second phase, the equivalent circuit of the switched capacitor converter 1000 can be as follows: Figure 6 As shown, the first flying capacitor CF1 is electrically connected between the first output terminal of the switched capacitor converter 1000 and the ground terminal of the switched capacitor converter 1000, the second flying capacitor CF2 is electrically connected between the second output terminal of the switched capacitor converter 1000 and the ground terminal of the switched capacitor converter 1000, and the third flying capacitor CF3 is electrically connected between the first output terminal of the switched capacitor converter 1000 and the second output terminal of the switched capacitor converter 1000. In other words, the third flying capacitor CF3 is connected in series with the second flying capacitor CF2, and the series-connected second flying capacitor CF2 and third flying capacitor CF3 are connected in parallel with the first flying capacitor CF1.

[0095] Thus, in the first operation mode, the transistors 110 except the fifth transistor Q5 switch between the first phase and the second phase, so that the input voltage VIN, the first output voltage VO1 and the second output voltage VO2 achieve a 4:2:1 voltage conversion.

[0096] The following combination Figure 7-10 The specific implementation of the switched capacitor converter 1000 in the second operating mode is described in detail.

[0097] Reference Figure 7 and Figure 8 , Figure 7 This is a structural diagram of a second operating mode of a switched capacitor converter provided by an embodiment of the present application. Figure 8 This is a structural diagram of another switched capacitor converter in the second working mode provided by an embodiment of the present application. Figure 7 and Figure 8 As shown, in the second operation mode, the plurality of transistors 110 switch between the first phase and the second phase, so that the voltage conversion ratio among the input voltage VIN, the first output voltage VO1 and the second output voltage VO2 is 3:2:1.

[0098] like Figure 7 As shown, in the first phase, the first transistor Q1, the fourth transistor Q4, the seventh transistor Q7, the ninth transistor Q9, the tenth transistor Q10 and the twelfth transistor Q12 are all turned on; the second transistor Q2, the third transistor Q3, the fifth transistor Q5, the sixth transistor Q6, the eighth transistor Q8 and the eleventh transistor Q11 are all turned off.

[0099] like Figure 8 As shown, in the second phase, the first transistor Q1, the fourth transistor Q4, the seventh transistor Q7, the ninth transistor Q9, the tenth transistor Q10 and the twelfth transistor Q12 are all turned off; the second transistor Q2, the third transistor Q3, the fifth transistor Q5, the sixth transistor Q6, the eighth transistor Q8 and the eleventh transistor Q11 are all turned on.

[0100] For example, Figure 7As shown, the first transistor Q1 is turned on and the third transistor Q3 is turned off, then the first plate of the first flying capacitor CF1 is connected to the input terminal of the switched capacitor converter 1000, and the first plate of the first flying capacitor CF1 is disconnected from the first output terminal of the switched capacitor converter 1000; the second transistor Q2 is turned off and the fourth transistor Q4 is turned on, then the second plate of the first flying capacitor CF1 is disconnected from the ground terminal of the switched capacitor converter 1000, and the second plate of the first flying capacitor CF1 is connected to the first plate of the second flying capacitor CF2; the fifth transistor Q5 is turned off, the first transistor Q1 and the seventh transistor Q7 are turned on, then the first plate of the second flying capacitor CF2 is disconnected from the input terminal of the switched capacitor converter 1000, and the first plate of the second flying capacitor CF2 is connected to the second output terminal of the switched capacitor converter 1000. When the eighth transistor Q8 is turned off and the ninth transistor Q9 is turned on, the second plate of the second flying capacitor CF2 is disconnected from the second output terminal of the switched capacitor converter 1000, and the second plate of the second flying capacitor CF2 is connected to the ground terminal of the switched capacitor converter 1000; when the sixth transistor Q6 is turned off and the tenth transistor Q10 is turned on, the first plate of the third flying capacitor CF3 is disconnected from the first output terminal of the switched capacitor converter 1000, and the first plate of the third flying capacitor CF3 is connected to the second output terminal of the switched capacitor converter 1000; when the eleventh transistor Q11 is turned off and the twelfth transistor Q12 is turned on, the second plate of the third flying capacitor CF3 is disconnected from the second output terminal of the switched capacitor converter 1000, and the second plate of the third flying capacitor CF3 is connected to the ground terminal of the switched capacitor converter 1000.

[0101] Thus, in the first phase, the equivalent circuit of the switched capacitor converter 1000 can be as follows: Figure 9 As shown, the first flying capacitor CF1 is electrically connected between the input terminal of the switched capacitor converter 1000 and the second output terminal of the switched capacitor converter 1000, and the second flying capacitor CF2 and the third flying capacitor CF3 are both electrically connected between the second output terminal of the switched capacitor converter 1000 and the ground terminal of the switched capacitor converter 1000. In other words, the second flying capacitor CF2 and the third flying capacitor CF3 are connected in parallel, and the parallel-connected second flying capacitor CF2 and third flying capacitor CF3 are connected in series with the first flying capacitor CF1.

[0102] For example, Figure 8As shown, the first transistor Q1 is turned off and the third transistor Q3 is turned on, then the first plate of the first flying capacitor CF1 is disconnected from the input terminal of the switched capacitor converter 1000, and the first plate of the first flying capacitor CF1 is connected to the first output terminal of the switched capacitor converter 1000; the second transistor Q2 is turned on and the fourth transistor Q4 is turned off, then the second plate of the first flying capacitor CF1 is connected to the ground terminal of the switched capacitor converter 1000, and the second plate of the first flying capacitor CF1 is disconnected from the first plate of the second flying capacitor CF2; the fifth transistor Q5 is turned on, the first transistor Q1 and the seventh transistor Q7 are turned off, then the first plate of the second flying capacitor CF2 is connected to the input terminal of the switched capacitor converter 1000, and the first plate of the second flying capacitor CF2 is disconnected from the second output terminal of the switched capacitor converter 1000. When the eighth transistor Q8 is turned on and the ninth transistor Q9 is turned off, the second plate of the second flying capacitor CF2 is connected to the second output terminal of the switched capacitor converter 1000, and the second plate of the second flying capacitor CF2 is disconnected from the ground terminal of the switched capacitor converter 1000; when the sixth transistor Q6 is turned on and the tenth transistor Q10 is turned off, the first plate of the third flying capacitor CF3 is connected to the first output terminal of the switched capacitor converter 1000, and the first plate of the third flying capacitor CF3 is disconnected from the second output terminal of the switched capacitor converter 1000; when the eleventh transistor Q11 is turned on and the twelfth transistor Q12 is turned off, the second plate of the third flying capacitor CF3 is connected to the second output terminal of the switched capacitor converter 1000, and the second plate of the third flying capacitor CF3 is disconnected from the ground terminal of the switched capacitor converter 1000.

[0103] Thus, in the second phase, the equivalent circuit of the switched capacitor converter 1000 can be as follows: Figure 10 As shown, the first flying capacitor CF1 is electrically connected between the first output terminal of the switched capacitor converter 1000 and the ground terminal of the switched capacitor converter 1000, and the second flying capacitor CF2 and the third flying capacitor CF3 are both electrically connected between the first output terminal of the switched capacitor converter 1000 and the second output terminal of the switched capacitor converter 1000. In other words, the third flying capacitor CF3 is connected in parallel with the second flying capacitor CF2, and the parallel-connected third flying capacitor CF3 and second flying capacitor CF2 are connected in series with the first flying capacitor CF1.

[0104] Thus, in the second operation mode, the plurality of transistors 110 switch between the first phase and the second phase, so that the input voltage VIN, the first output voltage VO1 and the second output voltage VO2 achieve a voltage conversion of 3:2:1.

[0105] The following combination Figure 11-14 The specific implementation of the switched capacitor converter 1000 in the third operating mode is described in detail.

[0106] Reference Figure 11 and Figure 12 , Figure 11 This is a structural diagram of a third operating mode of a switched capacitor converter provided by an embodiment of the present application. Figure 12 This is a structural diagram of another switched capacitor converter in a third operating mode provided by an embodiment of the present application. Figure 11 and Figure 12 As shown, in the third operating mode, the other transistors in the plurality of transistors 110 except the first transistor Q1, the second transistor Q2, the third transistor Q3 and the fourth transistor Q4 are switched between the first phase and the second phase, so that the voltage conversion ratio between the input voltage VIN, the first output voltage VO1 and the second output voltage VO2 is 2:2:1.

[0107] In the first and second phases, the first transistor Q1 and the third transistor Q3 are both turned on. That is, the first transistor Q1 and the third transistor Q3 are always in the on state, so that the input terminal of the switched capacitor converter 1000 and the first output terminal of the switched capacitor converter 1000 are always connected. The second transistor Q2 and the fourth transistor Q4 are both turned off. That is, the second transistor Q2 and the fourth transistor Q4 are always in the off state, so that the first flying capacitor CF1 is not connected to the switched capacitor converter 1000.

[0108] like Figure 11 As shown, in the first phase, the fifth transistor Q5, the eighth transistor Q8, the tenth transistor Q10 and the twelfth transistor Q12 are all turned on; the sixth transistor Q6, the seventh transistor Q7, the ninth transistor Q9 and the eleventh transistor Q11 are all turned off.

[0109] like Figure 12 As shown, in the second phase, the fifth transistor Q5, the eighth transistor Q8, the tenth transistor Q10 and the twelfth transistor Q12 are all turned off; the sixth transistor Q6, the seventh transistor Q7, the ninth transistor Q9 and the eleventh transistor Q11 are all turned on.

[0110] For example, Figure 11As shown, the fifth transistor Q5 is turned on and the seventh transistor Q7 is turned off, then the first plate of the second flying capacitor CF2 is connected to the input terminal of the switched capacitor converter 1000, and the first plate of the second flying capacitor CF2 is disconnected from the second output terminal of the switched capacitor converter 1000; the eighth transistor Q8 is turned on and the ninth transistor Q9 is turned off, then the second plate of the second flying capacitor CF2 is connected to the second output terminal of the switched capacitor converter 1000, and the second plate of the second flying capacitor CF2 is disconnected from the ground terminal of the switched capacitor converter 1000; the sixth transistor Q8 is turned on and the ninth transistor Q9 is turned off, then the second plate of the second flying capacitor CF2 is connected to the second output terminal of the switched capacitor converter 1000, and the second plate of the second flying capacitor CF2 is disconnected from the ground terminal of the switched capacitor converter 1000; When the transistor Q6 is turned off and the tenth transistor Q10 is turned on, the first plate of the third flying capacitor CF3 is disconnected from the first output terminal of the switched capacitor converter 1000, and the first plate of the third flying capacitor CF3 is connected to the second output terminal of the switched capacitor converter 1000; when the twelfth transistor Q12 is turned on and the eleventh transistor Q11 is turned off, the second plate of the third flying capacitor CF3 is disconnected from the second output terminal of the switched capacitor converter 1000, and the second plate of the third flying capacitor CF3 is connected to the ground terminal of the switched capacitor converter 1000.

[0111] Thus, in the first phase, the equivalent circuit of the switched capacitor converter 1000 can be as follows: Figure 13 As shown, the second flying capacitor CF2 is electrically connected between the input terminal of the switched capacitor converter 1000 and the second output terminal of the switched capacitor converter 1000, and the third flying capacitor CF3 is electrically connected between the second output terminal of the switched capacitor converter 1000 and the ground terminal of the switched capacitor converter 1000. That is, the second flying capacitor CF2 and the third flying capacitor CF3 are connected in series.

[0112] For example, Figure 12 As shown, the fifth transistor Q5 is turned off and the seventh transistor Q7 is turned on, then the first plate of the second flying capacitor CF2 is disconnected from the input terminal of the switched capacitor converter 1000, and the first plate of the second flying capacitor CF2 is connected to the second output terminal of the switched capacitor converter 1000; the eighth transistor Q8 is turned off and the ninth transistor Q9 is turned on, then the second plate of the second flying capacitor CF2 is disconnected from the second output terminal of the switched capacitor converter 1000, and the second plate of the second flying capacitor CF2 is connected to the ground terminal of the switched capacitor converter 1000; the sixth transistor Q8 is turned off and the ninth transistor Q9 is turned on, then the second plate of the second flying capacitor CF2 is disconnected from the second output terminal of the switched capacitor converter 1000, and the second plate of the second flying capacitor CF2 is connected to the ground terminal of the switched capacitor converter 1000; When the transistor Q6 is turned on and the tenth transistor Q10 is turned off, the first plate of the third flying capacitor CF3 is connected to the first output terminal of the switched capacitor converter 1000, and the first plate of the third flying capacitor CF3 is disconnected from the second output terminal of the switched capacitor converter 1000; when the twelfth transistor Q12 is turned off and the eleventh transistor Q11 is turned on, the second plate of the third flying capacitor CF3 is connected to the second output terminal of the switched capacitor converter 1000, and the second plate of the third flying capacitor CF3 is disconnected from the ground terminal of the switched capacitor converter 1000.

[0113] Thus, in the second phase, the equivalent circuit of the switched capacitor converter 1000 can be as follows: Figure 14 As shown, the second flying capacitor CF2 is electrically connected between the second output terminal of the switched capacitor converter 1000 and the ground terminal of the switched capacitor converter 1000, and the third flying capacitor CF3 is electrically connected between the input terminal of the switched capacitor converter 1000 and the second output terminal of the switched capacitor converter 1000. In other words, the second flying capacitor CF2 and the third flying capacitor CF3 are connected in series.

[0114] Thus, in the third operating mode, the other transistors in the plurality of transistors 110 except the first transistor Q1, the second transistor Q2, the third transistor Q3 and the fourth transistor Q4 are switched between the first phase and the second phase, so that the input voltage VIN, the first output voltage VO1 and the second output voltage VO2 achieve a voltage conversion ratio of 2:2:1.

[0115] The following combination Figure 15 and Figure 16 The specific implementation of the switched capacitor converter 1000 in the fourth operating mode is described in detail.

[0116] Reference Figure 15 , Figure 15 This is a structural diagram of a fourth working mode of a switched capacitor converter provided by an embodiment of the present application. Figure 15 As shown, in the fourth operating mode, the first transistor Q1, the third transistor Q3, the fifth transistor Q5, the sixth transistor Q6, the seventh transistor Q7 and the tenth transistor Q10 are all turned on; the second transistor Q2, the fourth transistor Q4, the eighth transistor Q8, the ninth transistor Q9, the eleventh transistor Q11 and the twelfth transistor Q12 are all turned off, so that the voltage conversion ratio among the input voltage VIN, the first output voltage VO1 and the second output voltage VO2 is 1:1:1.

[0117] For example, Figure 15As shown, when the second transistor Q2 and the fourth transistor Q4 are turned off, the first flying capacitor CF1 is not connected to the switched capacitor converter 1000; when the eighth transistor Q8 and the ninth transistor Q9 are turned off, the second flying capacitor CF2 is not connected to the switched capacitor converter 1000; when the eleventh transistor Q11 and the twelfth transistor Q12 are turned off, the third flying capacitor CF3 is not connected to the switched capacitor converter 1000. When the first transistor Q1 and the third transistor Q3 are turned on, the input terminal of the switched capacitor converter 1000 and the first output terminal of the switched capacitor converter 1000 are connected; when the sixth transistor Q6 and the tenth transistor Q10 are turned on, the first output terminal of the switched capacitor converter 1000 and the second output terminal of the switched capacitor converter 1000 are connected; and when the fifth transistor Q5 and the seventh transistor Q7 are turned on, the input terminal of the switched capacitor converter 1000 and the second output terminal of the switched capacitor converter 1000 are connected.

[0118] Thus, in the second phase, the equivalent circuit of the switched capacitor converter 1000 can be as follows: Figure 16 As shown, the first flying capacitor CF1, the second flying capacitor CF2 and the third flying capacitor CF3 are not connected to the switched capacitor converter 1000. The first output terminal and the second output terminal of the switched capacitor converter 1000 are both electrically connected to the input terminal of the switched capacitor converter 1000.

[0119] Therefore, in the fourth operation mode, the input voltage VIN, the first output voltage VO1 and the second output voltage VO2 can achieve a voltage conversion ratio of 1:1:1.

[0120] Based on the description of the above embodiment, a possible implementation of the voltage conversion circuit 100 is exemplified. Figure 17 , Figure 17 This is a structural diagram of another switched capacitor converter provided by an embodiment of the present application. Figure 17 As shown, the number of the voltage conversion circuits 100 is at least two.

[0121] The input end of each voltage conversion circuit 100 is electrically connected to the input end of the switched capacitor converter 1000, the first output end of each voltage conversion circuit 100 is electrically connected to the first output end of the switched capacitor converter 1000, the second output end of each voltage conversion circuit 100 is electrically connected to the second output end of the switched capacitor converter 1000, and the voltage conversion circuits 100 are connected in parallel.

[0122] By connecting at least two voltage conversion circuits 100 in parallel, the at least two voltage conversion circuits 100 can share the load current. In this way, the output current of each of the at least two voltage conversion circuits 100 is added together, thereby increasing the output current of the switched capacitor converter 1000. As a result, the switched capacitor converter 1000 can achieve a higher power output. At the same time, the at least two voltage conversion circuits connected in parallel can shunt the load current. When the load changes, the at least two voltage conversion circuits work together, allowing the at least two voltage conversion circuits to provide output current more smoothly. As a result, the switched capacitor converter 1000 can output an output voltage with less ripple.

[0123] Based on the description of the above embodiment, a possible implementation of the switched capacitor converter 1000 is exemplified. Figure 3-Figure 17 As shown, the switched capacitor converter 1000 may further include: a first output capacitor CO1 and a second output capacitor CO2 .

[0124] The first plate of the first output capacitor CO1 is electrically connected to the first output terminal of the switched capacitor converter 1000, the first plate of the second output capacitor CO2 is electrically connected to the second output terminal of the switched capacitor converter 1000, and the second plate of the first output capacitor CO1 and the second plate of the second output capacitor CO2 are both grounded.

[0125] The first output capacitor CO1 and the second output capacitor CO2 can be referred to as output filter capacitors. Thus, the first output capacitor CO1 can smooth and filter high-frequency noise and ripple in the first output voltage VO1, protecting the first output voltage VO1 from the effects of these high-frequency noise and ripple. Consequently, the switched capacitor converter 1000 can output a more stable first output voltage VO1. The second output capacitor CO2 can smooth and filter high-frequency noise and ripple in the second output voltage VO2, protecting the second output voltage VO2 from the effects of these high-frequency noise and ripple. Consequently, the switched capacitor converter 1000 can output a more stable second output voltage VO2.

[0126] In an embodiment of the present application, a switched capacitor conversion chip is further provided. The switched capacitor conversion chip includes the switched capacitor converter provided in an embodiment of the present application.

[0127] The switched capacitor conversion chip provided in the embodiment of the present application has the same beneficial effects as the switched capacitor converter provided in the embodiment of the present application, and will not be described in detail here.

[0128] An embodiment of the present application further provides an electronic device including a switched capacitor conversion chip.

[0129] The electronic device provided in the embodiment of the present application has the same beneficial effects as the switched capacitor conversion chip provided in the embodiment of the present application, which will not be described in detail here.

[0130] Finally, it should be noted that the above embodiments are merely specific implementations of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A switched capacitor converter, characterized in that: The switched capacitor converter comprises: a voltage conversion circuit, an input end of the voltage conversion circuit is electrically connected to an input end of the switched capacitor converter, a first output end of the voltage conversion circuit is electrically connected to a first output end of the switched capacitor converter, and a second output end of the voltage conversion circuit is electrically connected to a second output end of the switched capacitor converter; the voltage conversion circuit comprises: a plurality of transistors, a logic control circuit, a first flying capacitor, a second flying capacitor and a third flying capacitor, the control ends of the plurality of transistors are electrically connected to the logic control circuit, wherein the number of the first flying capacitor, the second flying capacitor and the third flying capacitor is 1; The logic control circuit is used to control the on or off of the multiple transistors to change the connection relationship between the first flying capacitor, the second flying capacitor and the third flying capacitor, so that the switched capacitor converter converts the input voltage into a first output voltage and a second output voltage, the input voltage is the voltage of the input end of the switched capacitor converter, the first output voltage is the voltage of the first output end of the switched capacitor converter, and the second output voltage is the voltage of the second output end of the switched capacitor converter; Wherein, the plurality of transistors include: a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, a seventh transistor, an eighth transistor, a ninth transistor, a tenth transistor, an eleventh transistor and a twelfth transistor; A first end of the first transistor is electrically connected to an input end of the switched capacitor converter, a second end of the first transistor is electrically connected to a first end of the third transistor, a second end of the third transistor is electrically connected to a first end of the sixth transistor, a second end of the sixth transistor is electrically connected to a first end of the tenth transistor, a second end of the tenth transistor is electrically connected to a first end of the eleventh transistor, and a second end of the eleventh transistor is electrically connected to a first end of the twelfth transistor; The first end of the second transistor is electrically connected to the second end of the fourth transistor, the first end of the fourth transistor is electrically connected to the first end of the seventh transistor, the second end of the seventh transistor is electrically connected to the first end of the eighth transistor, and the second end of the eighth transistor is electrically connected to the first end of the ninth transistor; The first plate of the first flying capacitor and the first end of the fifth transistor are both electrically connected between the second end of the first transistor and the first end of the third transistor, the second plate of the first flying capacitor is electrically connected between the first end of the second transistor and the second end of the fourth transistor, the second end of the fifth transistor and the first plate of the second flying capacitor are both electrically connected between the first end of the fourth transistor and the first end of the seventh transistor, and the second plate of the second flying capacitor is electrically connected between the second end of the eighth transistor and the first end of the ninth transistor; The first plate of the third flying capacitor is electrically connected between the second end of the sixth transistor and the first end of the tenth transistor, and the second plate of the third flying capacitor is electrically connected between the second end of the eleventh transistor and the first end of the twelfth transistor; The first output terminal of the switched capacitor converter is electrically connected between the second terminal of the third transistor and the first terminal of the sixth transistor, the second terminal of the seventh transistor and the second terminal of the tenth transistor are also electrically connected to the second output terminal of the switched capacitor converter, and the second terminal of the second transistor, the second terminal of the ninth transistor and the second terminal of the twelfth transistor are all electrically connected to the ground terminal of the switched capacitor converter.

2. The switched capacitor converter according to claim 1, wherein: In a first operating mode, a voltage conversion ratio among the input voltage, the first output voltage and the second output voltage is 4:2:1, and the first operating mode is that the other transistors among the plurality of transistors except the fifth transistor are switched between a first phase and a second phase; Wherein, in the first phase and the second phase, the fifth transistor is turned off; In the first phase, the first transistor, the fourth transistor, the eighth transistor, the tenth transistor and the twelfth transistor are all turned on; the second transistor, the third transistor, the sixth transistor, the seventh transistor, the ninth transistor and the eleventh transistor are all turned off; In the second phase, the first transistor, the fourth transistor, the eighth transistor, the tenth transistor and the twelfth transistor are all turned off; the second transistor, the third transistor, the sixth transistor, the seventh transistor, the ninth transistor and the eleventh transistor are all turned on.

3. The switched capacitor converter according to claim 1, wherein: In the second working mode, the voltage conversion ratio among the input voltage, the first output voltage and the second output voltage is 3:2:1, and the second working mode is that the plurality of transistors switch between the first phase and the second phase; Wherein, in the first phase, the first transistor, the fourth transistor, the seventh transistor, the ninth transistor, the tenth transistor and the twelfth transistor are all turned on; the second transistor, the third transistor, the fifth transistor, the sixth transistor, the eighth transistor and the eleventh transistor are all turned off; In the second phase, the first transistor, the fourth transistor, the seventh transistor, the ninth transistor, the tenth transistor and the twelfth transistor are all turned off; the second transistor, the third transistor, the fifth transistor, the sixth transistor, the eighth transistor and the eleventh transistor are all turned on.

4. The switched capacitor converter according to claim 1, wherein: In a third working mode, a voltage conversion ratio among the input voltage, the first output voltage and the second output voltage is 2:2:1, and the first working mode is that the other transistors among the plurality of transistors except the first transistor, the second transistor, the third transistor and the fourth transistor are switched between a first phase and a second phase; Wherein, in the first phase and the second phase, the first transistor and the third transistor are both turned on, and the second transistor and the fourth transistor are both turned off; In the first phase, the fifth transistor, the eighth transistor, the tenth transistor and the twelfth transistor are all turned on; the sixth transistor, the seventh transistor, the ninth transistor and the eleventh transistor are all turned off; In the second phase, the fifth transistor, the eighth transistor, the tenth transistor and the twelfth transistor are all turned off; and the sixth transistor, the seventh transistor, the ninth transistor and the eleventh transistor are all turned on.

5. The switched capacitor converter according to claim 1, wherein: In a fourth operating mode, a voltage conversion ratio among the input voltage, the first output voltage and the second output voltage is 1:1:1; Among them, in the fourth working mode, the first transistor, the third transistor, the fifth transistor, the sixth transistor, the seventh transistor and the tenth transistor are all turned on; the second transistor, the fourth transistor, the eighth transistor, the ninth transistor, the eleventh transistor and the twelfth transistor are all turned off.

6. The switched capacitor converter according to any one of claims 1 to 5, characterized in that: The number of the voltage conversion circuits is at least 2, the input end of each of the voltage conversion circuits is electrically connected to the input end of the switched capacitor converter, the first output end of each of the voltage conversion circuits is electrically connected to the first output end of the switched capacitor converter, the second output end of each of the voltage conversion circuits is electrically connected to the second output end of the switched capacitor converter, and the voltage conversion circuits are connected in parallel.

7. The switched capacitor converter according to any one of claims 1 to 5, characterized in that: The switched capacitor converter further comprises: a first output capacitor and a second output capacitor; The first plate of the first output capacitor is electrically connected to the first output terminal of the switched capacitor converter, the first plate of the second output capacitor is electrically connected to the second output terminal of the switched capacitor converter, and the second plate of the first output capacitor and the second plate of the second output capacitor are both electrically connected to the ground terminal of the switched capacitor converter.

8. A switched capacitor conversion chip, characterized in that: include: A switched capacitor voltage converter as claimed in any one of claims 1 to 7.

9. An electronic device, characterized in that: include: The switched capacitor conversion chip as claimed in claim 8.

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