Three-phase interleaved hybrid switched capacitor circuit, voltage converter and electronic equipment

Abstract

The invention provides a three-phase interleaved hybrid switched capacitor circuit, a voltage converter and electronic equipment, and relates to the technical field of converters, the circuit comprises a three-phase switched capacitor circuit and a three-phase switch conversion circuit, the three-phase switched capacitor circuit and the three-phase switch conversion circuit share a second switch assembly, the three-phase switched capacitor circuit comprises a first switch assembly, a first capacitor, a second capacitor and a third capacitor, the capacitors are mutually multiplexed in three phases, and the three-phase switch conversion circuit comprises a first inductor, a second inductor and a third inductor; the first switch assembly and the second switch assembly control the connection relation between each capacitor and each inductor according to a PWM control signal, so that the voltage conversion ratio of the three-phase switch capacitor circuit is 3: 1, and the minimum voltage conversion ratio of the three-phase switch conversion circuit is 3: 1; and the three-phase interleaved hybrid switched capacitor circuit converts the input voltage into the output voltage at the minimum voltage conversion ratio of 9: 1 according to the duty ratio of the PWM control signal. By multiplexing the second switch assembly and each capacitor, the number of devices is reduced.

Description

Technical Field

[0001] This application relates to the field of power management chip technology, and in particular to a three-phase interleaved hybrid switched capacitor circuit, voltage converter, and electronic device. Background Technology

[0002] With the rapid development of artificial intelligence (AI) technology, the power consumption of AI chips is also continuously increasing. The intermediate bus architecture has become the mainstream design for onboard power supplies. This architecture is used to perform voltage conversion, for example, converting 48V to 1V to power the AI ​​chip. The intermediate bus architecture typically consists of two cascaded circuits. The front-end circuit is a converter with a fixed voltage conversion ratio; for example, it can convert 48V to 12V. The rear-end circuit is a multi-phase voltage regulator circuit that can further convert 12V to 1V. The front-end circuit usually employs a full-bridge topology, a half-bridge topology, or a high-efficiency resonant switching power supply (LLC circuit) topology to achieve high-efficiency voltage conversion.

[0003] However, as the power consumption of single AI chips exceeds 700W or even higher, traditional magnetic devices (such as inductors) face bottlenecks in terms of size, voltage conversion efficiency, and thermal management. Magnetic devices are large, and EMI (Electromagnetic Interference) control is complex. Compared to capacitive devices (such as capacitors), the power density of magnetic devices is much lower, making further reduction in size difficult in high-frequency, high-density applications. Switched-capacitor converters, due to their advantages of not requiring magnetic devices, compact structure, and low EMI, have become a promising alternative. Switched-capacitor converters achieve energy transfer through capacitor arrays and timing control, possessing a natural advantage in space-constrained on-board environments. However, due to the numerous conversion paths, complex control logic, and output that easily changes with input, traditional switched-capacitor converters also struggle to meet the demands of high-power AI chips.

[0004] To balance the voltage regulation capabilities of magnetic devices with the high-density characteristics of capacitive devices, the hybrid switched-capacitor (HSC) architecture has emerged. This architecture combines the voltage regulation of magnetic devices with the voltage stabilization of capacitive devices. Through their synergistic effect, it reduces energy loss and improves the overall system efficiency. The hybrid switched-capacitor architecture has shown great application potential in voltage converters with high-voltage input and low-voltage output. As artificial intelligence chips increasingly demand faster power supply response, better load dynamics, and more balanced thermal distribution, single-phase hybrid switched-capacitor voltage converters (i.e., single-phase HSC architecture) may face problems such as current stress concentration (i.e., large currents flowing through the various components of the voltage converter) and hot spots (i.e., severe heat generation in the components of the voltage converter) under high-load applications. Therefore, multiphase interleaved hybrid switched capacitor architecture has become a key research direction for the next stage. Multiphase interleaved hybrid switched capacitor architecture is usually a parallel connection of single-phase hybrid switched capacitor architecture. Through multiphase parallel operation, the current flowing through the single-phase HSC architecture is evenly distributed to the parallel multiphase HSC architecture. This can not only effectively reduce input and output current ripple and improve thermal uniformity, but also enhance the transient response capability and modular scalability of the system. The integration of multiphase interleaving technology and HSC architecture enables voltage converters to achieve better efficiency conversion, thermal management and dynamic performance while maintaining high power density, becoming the core solution for onboard power supplies of next-generation artificial intelligence chips.

[0005] The multiphase interleaved hybrid switched capacitor architecture can be easily replicated from the single-phase hybrid switched capacitor architecture, and the carrier phase between each phase of the hybrid switched capacitor architecture is offset accordingly to achieve the interleaved operation of each phase. The advantage of this solution is that the solution is simple to implement. However, replicating the single-phase hybrid switched capacitor architecture increases the number of devices by many times, which increases the number of devices and further increases the cost. Summary of the Invention

[0006] This application provides a three-phase interleaved hybrid switched capacitor circuit, voltage converter, and electronic device to reduce the number of components and further reduce costs.

[0007] In a first aspect, this application provides a three-phase interleaved hybrid switched capacitor circuit, comprising: a three-phase switched capacitor circuit and a three-phase switching conversion circuit; the three-phase switched capacitor circuit includes a first switching component, a first capacitor, a second capacitor, and a third capacitor, wherein the first capacitor, the second capacitor, and the third capacitor are reused in the three phases of the three-phase switched capacitor circuit; the three-phase switching conversion circuit includes a first inductor, a second inductor, and a third inductor; the three-phase switched capacitor circuit and the three-phase switching conversion circuit share a second switching component; the switching component includes the first switching component and the second switching component; The input terminal of the three-phase switched capacitor circuit serves as the input terminal of the three-phase interleaved hybrid switched capacitor circuit, used to connect the input voltage. The first switching assembly is electrically connected to the second switching assembly. The second switching assembly is electrically connected to the first terminal of the first inductor, the first terminal of the second inductor, and the first terminal of the third inductor, respectively. The output terminal of the three-phase switching conversion circuit is electrically connected to the second terminal of the first inductor, the second terminal of the second inductor, and the second terminal of the third inductor, respectively, and serves as the output terminal of the three-phase interleaved hybrid switched capacitor circuit, used to output the output voltage. The switching assembly is used to control the electrical connection relationship between the first capacitor, the second capacitor, the third capacitor, the first inductor, the second inductor, and the third inductor according to the received PWM control signal, so that the voltage conversion ratio of the three-phase switching capacitor circuit is 3:1, and the minimum voltage conversion ratio of the three-phase switching circuit is 3:1. The three-phase interleaved hybrid switched capacitor circuit is used to convert the input voltage into the output voltage according to the duty cycle of the PWM control signal, and the voltage conversion ratio between the input voltage and the output voltage is at least 9:1.

[0008] In one possible design, the PWM control signal includes: a first PWM control signal, a second PWM control signal, a third PWM control signal, a fourth PWM control signal, a fifth PWM control signal, a sixth PWM control signal, a seventh PWM control signal, an eighth PWM control signal, a ninth PWM control signal, a tenth PWM control signal, an eleventh PWM control signal, and a twelfth PWM control signal; the first switching assembly includes: a first switching transistor, a second switching transistor, a third switching transistor, a seventh switching transistor, an eighth switching transistor, and a ninth switching transistor; The second terminal of the first switching transistor is electrically connected to the second terminal of the second switching transistor and the second terminal of the third switching transistor, and serves as the input terminal of the three-phase switched capacitor circuit for receiving the input voltage; The first terminal of the first switching transistor is electrically connected to the second terminal of the seventh switching transistor and the first terminal of the first capacitor, respectively; the first terminal of the seventh switching transistor is electrically connected to the first terminal of the third capacitor. The first terminal of the second switch is electrically connected to the second terminal of the eighth switch and the first terminal of the second capacitor, respectively; the first terminal of the eighth switch is electrically connected to the second terminal of the first capacitor. The first terminal of the third switch is electrically connected to the second terminal of the third capacitor and the second terminal of the ninth switch, respectively; the first terminal of the ninth switch is electrically connected to the second terminal of the second capacitor. The control terminal of the first switch is used to receive the first PWM control signal, the control terminal of the second switch is used to receive the second PWM control signal, the control terminal of the third switch is used to receive the third PWM control signal, the control terminal of the seventh switch is used to receive the seventh PWM control signal, the control terminal of the eighth switch is used to receive the eighth PWM control signal, and the control terminal of the ninth switch is used to receive the ninth PWM control signal.

[0009] In one possible design, the second switching assembly includes: a fourth switching transistor, a fifth switching transistor, a sixth switching transistor, a tenth switching transistor, an eleventh switching transistor, and a twelfth switching transistor; The second terminal of the tenth switch is electrically connected to the first terminal of the seventh switch, and the first terminal of the tenth switch is electrically connected to the second terminal of the fourth switch and the first terminal of the first inductor, respectively. The second terminal of the eleventh switch is electrically connected to the first terminal of the eighth switch, and the first terminal of the eleventh switch is electrically connected to the second terminal of the fifth switch and the first terminal of the second inductor, respectively. The second terminal of the twelfth switch is electrically connected to the first terminal of the ninth switch, and the first terminal of the twelfth switch is electrically connected to the second terminal of the sixth switch and the first terminal of the third inductor, respectively. The first terminal of the fourth switch, the first terminal of the fifth switch, and the first terminal of the sixth switch are all grounded; The control terminal of the fourth switch is used to receive the fourth PWM control signal, the control terminal of the fifth switch is used to receive the fifth PWM control signal, the control terminal of the sixth switch is used to receive the sixth PWM control signal, the control terminal of the tenth switch is used to receive the tenth PWM control signal, the control terminal of the eleventh switch is used to receive the eleventh PWM control signal, and the control terminal of the twelfth switch is used to receive the twelfth PWM control signal.

[0010] In one possible design, the three-phase interleaved hybrid switched capacitor circuit further includes: a fourth capacitor; The first terminal of the fourth capacitor is electrically connected to the output terminal of the three-phase interleaved hybrid switched capacitor circuit, and the second terminal of the fourth capacitor is grounded.

[0011] In one possible design, the switching assembly is used to control its own switching transistors to switch sequentially between a first mode, a second mode, a third mode, a fourth mode, a fifth mode, and a sixth mode within one cycle according to the received PWM control signal, so that the voltage conversion ratio of the three-phase switched capacitor circuit is 3:1 and the voltage conversion ratio of the three-phase switching conversion circuit is 3:1. The three-phase interleaved hybrid switched capacitor circuit is used to convert the input voltage into the output voltage, and the voltage conversion ratio between the input voltage and the output voltage is 9:1.

[0012] In one possible design, in the first mode, the first switch, the fourth switch, the fifth switch, the eighth switch, the ninth switch, the tenth switch, and the twelfth switch are all controlled to be in the on state, while the second switch, the third switch, the sixth switch, the seventh switch, and the eleventh switch are all controlled to be in the off state. In the second mode, the fourth, fifth, sixth, ninth, and tenth switches are all controlled to be in the on state, while the first, second, third, seventh, eighth, eleventh, and twelfth switches are all controlled to be in the off state. In the third mode, the second, fifth, sixth, seventh, ninth, tenth, and eleventh switches are all controlled to be in the on state, while the first, third, fourth, eighth, and twelfth switches are all controlled to be in the off state. In the fourth mode, the fourth, fifth, sixth, seventh, and eleventh switches are all controlled to be in the on state, while the first, second, third, eighth, ninth, tenth, and twelfth switches are all controlled to be in the off state. In the fifth mode, the third, fourth, sixth, seventh, eighth, eleventh, and twelfth switches are all controlled to be in the on state, while the first, second, fifth, ninth, and tenth switches are all controlled to be in the off state. In the sixth mode, the fourth, fifth, sixth, eighth, and twelfth switches are all controlled to be in the on state, while the first, second, third, seventh, ninth, tenth, and eleventh switches are all controlled to be in the off state.

[0013] In one possible design, when the control terminal of the first switch receives the first PWM control signal, the control terminal of the second switch receives the second PWM control signal by lagging the phase of the first PWM control signal by 120°, and the control terminal of the third switch receives the third PWM control signal by lagging the phase of the first PWM control signal by 240°. The switching state of the fourth switch is complementary to the switching state of the second switch, the switching state of the fifth switch is complementary to the switching state of the third switch, and the switching state of the sixth switch is complementary to the switching state of the first switch. The complementary state indicates that when one switch is in the on state, the other switch is in the off state. The switching state of the seventh switch is the same as that of the eleventh switch, and the duration of the conduction state is equal to the time from the start of the conduction state of the second switch to the start of the turn-off state of the third switch. The switching state of the ninth switch is the same as that of the tenth switch, and the duration of the conduction state is equal to the time from the start of the conduction state of the first switch to the start of the turn-off state of the second switch. The switching state of the eighth switch is the same as that of the twelfth switch, and the duration of the conduction state is equal to the time from the start of the conduction state of the third switch to the start of the turn-off state of the first switch.

[0014] In one possible design, the inductor assembly includes: a first inductor, a second inductor, and a third inductor; the inductor assembly is a three-phase coupled inductor.

[0015] In a second aspect, this application provides a voltage converter, including: a three-phase interleaved hybrid switched capacitor circuit as described in the first aspect.

[0016] Thirdly, this application provides an electronic device, including: a voltage converter as described in the second aspect.

[0017] The beneficial effects of the embodiments of this application are as follows: In this embodiment, the three-phase interleaved hybrid switched capacitor circuit includes: a three-phase switched capacitor circuit and a three-phase switching conversion circuit; the three-phase switched capacitor circuit includes a first switching component, a first capacitor, a second capacitor, and a third capacitor, and the first capacitor, second capacitor, and third capacitor are reused in the three phases of the three-phase switched capacitor circuit; the three-phase switching conversion circuit includes a first inductor, a second inductor, and a third inductor; the three-phase switched capacitor circuit and the three-phase switching conversion circuit share a second switching component; the switching component includes a first switching component and a second switching component; by configuring the three-phase switched capacitor circuit to reuse the second switching component with the three-phase switching conversion circuit, and for the three phases in the three-phase switched capacitor circuit, by... The capacitors in the three phases are reused to reduce the number of components in the three-phase interleaved hybrid switched capacitor circuit and further reduce the cost of the circuit. The specific electrical connection is as follows: the input terminal of the three-phase switched capacitor circuit serves as the input terminal of the three-phase interleaved hybrid switched capacitor circuit, which is used to connect the input voltage. The first switching assembly is electrically connected to the second switching assembly. The second switching assembly is electrically connected to the first terminal of the first inductor, the first terminal of the second inductor, and the first terminal of the third inductor, respectively. The output terminal of the three-phase switching conversion circuit is electrically connected to the second terminal of the first inductor, the second terminal of the second inductor, and the second terminal of the third inductor, respectively, and serves as the output terminal of the three-phase interleaved hybrid switched capacitor circuit, which is used to output the output voltage. The switching states of each switching transistor in the switching assembly are controlled by the PWM control signal, thereby controlling the electrical connections between the first capacitor, second capacitor, third capacitor, first inductor, second inductor, and third inductor. This ensures a voltage conversion ratio of 3:1 for the three-phase switched capacitor circuit, with a minimum voltage conversion ratio of 3:1 for the three-phase switching converter circuit. Based on the cascaded relationship between the three-phase switched capacitor circuit and the three-phase switching converter circuit, the three-phase interleaved hybrid switched capacitor circuit can convert the input voltage to the output voltage according to the duty cycle of the PWM control signal, with a minimum input-to-output voltage conversion ratio of 9:1. The three-phase interleaved hybrid switched capacitor circuit achieves a high voltage conversion ratio while simplifying the circuit, reducing the number of components, and further lowering costs. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other embodiments can be obtained based on these drawings.

[0019] Figure 1A schematic diagram of the circuit structure of a three-phase interleaved hybrid switched capacitor circuit provided in an embodiment of this application; Figure 2(a) is a schematic diagram of the equivalent circuit structure of a first mode provided in an embodiment of this application; Figure 2(b) is a schematic diagram of the equivalent circuit structure of a second mode provided in an embodiment of this application; Figure 2(c) is a schematic diagram of the equivalent circuit structure of a third mode provided in an embodiment of this application; Figure 2(d) is a schematic diagram of the equivalent circuit structure of a fourth mode provided in an embodiment of this application; Figure 2(e) is a schematic diagram of the equivalent circuit structure of a fifth mode provided in an embodiment of this application; Figure 2(f) is a schematic diagram of the equivalent circuit structure of a sixth mode provided in an embodiment of this application; Figure 3 A waveform diagram of a three-phase interleaved hybrid switched capacitor circuit provided in an embodiment of this application; Figure 4(a) shows the current waveform of a three-phase interleaved hybrid switched capacitor circuit in steady state according to an embodiment of this application. Figure 4(b) shows the transient current waveform of a three-phase interleaved hybrid switched capacitor circuit provided in an embodiment of this application. Detailed Implementation

[0020] In this application, "at least one" means one or more, and "more than one" means two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c alone can mean: a alone, b alone, c alone, a combination of a and b, a combination of a and c, a combination of b and c, or a, b, and c, where a, b, and c can be single or multiple. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] The terms “center,” “longitudinal,” “lateral,” “up,” “down,” “left,” “right,” “front,” and “rear,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0022] The terms "connected" and "connected" should be interpreted broadly. For example, in circuit structures, "connected" or "connected" can refer not only to physical connections but also to electrical or signal connections. This could be a direct connection (physical connection) or an indirect connection via at least one intermediate component, as long as the circuit is connected. It could also refer to the internal connection between two components. Similarly, a signal connection can refer to a connection via a circuit or a medium, such as radio waves. Those skilled in the art will understand the specific meaning of these terms in this application based on the specific circumstances.

[0023] Currently, in the application of hybrid switched capacitor architecture, the main problems of single-phase HSC architecture are that under high load application scenarios, it may face problems such as current stress concentration, hot spot protrusion, and large current ripple (i.e., a large difference between the peak and valley values ​​of the current). In order to solve the above problems, inductors with large inductance values ​​and chip capacitors with low ESR (Equivalent Series Resistance) values ​​are usually selected as output filter capacitors in hybrid switched capacitor architecture, so that the system can achieve high power density and high efficiency.

[0024] For applications with high loads and high sensitivity to voltage ripple, a hybrid switched capacitor architecture with interleaved parallel connections is typically used. This architecture is implemented by replicating a single-phase hybrid switched capacitor architecture into a multi-phase hybrid switched capacitor architecture, and then manually shifting the carrier phases of each phase to achieve interleaved operation. For example, a three-phase interleaved hybrid switched capacitor architecture is achieved by replicating a single-phase interleaved hybrid switched capacitor architecture three times, with each phase operating in parallel. The carrier phases of the three phases are shifted by 120° to achieve interleaved operation.

[0025] The implementation scheme of replicating the single-phase hybrid switched capacitor architecture to obtain the multi-phase hybrid switched capacitor architecture is relatively simple, as it does not require redesigning the hybrid switched capacitor architectures of other phases. However, it also has obvious drawbacks. Apart from the manual delay in the switching state control signal and the interaction of load current information, each phase actually operates independently. The main power circuits of each phase are also independent. If the voltage converter is to achieve n-phase interleaved operation, it means that the designer needs to replicate the single-phase voltage converter n times. At this time, the number of switching transistors and passive devices in the corresponding circuit increases by n times compared to the single-phase voltage converter. These disadvantages make it difficult for designers to make a difficult choice between the low output ripple and low current stress brought by the multi-phase interleaved hybrid switched capacitor architecture and the possible reduction in power density and system complexity.

[0026] Taking a three-phase interleaved hybrid switched capacitor architecture as an example, in order to improve upon the solution provided in related technologies that replicates a single-phase interleaved hybrid switched capacitor architecture three times to achieve a three-phase interleaved hybrid switched capacitor architecture, thereby reducing the number of components and further reducing costs, this application provides a three-phase interleaved hybrid switched capacitor circuit. By reusing some of the switching transistors in the three-phase interleaved hybrid switched capacitor circuit, and by reusing the first, second, and third capacitors during the operation of each phase, the number of components used in the system is reduced, thereby reducing the system cost.

[0027] See Figure 1 , Figure 1 A schematic diagram of a three-phase interleaved hybrid switched capacitor circuit provided in this application embodiment is shown below. Figure 1 As shown, the three-phase interleaved hybrid switched capacitor circuit 1000 may include: a three-phase switched capacitor circuit 100 and a three-phase switching conversion circuit 200; the three-phase switched capacitor circuit 100 includes a first switching component 10, a first capacitor C1, a second capacitor C2, and a third capacitor C3, and the first capacitor C1, the second capacitor C2, and the third capacitor C3 are reused in the three phases of the three-phase switched capacitor circuit 100; the three-phase switching conversion circuit 200 includes a first inductor L1, a second inductor L2, and a third inductor L3; the three-phase switched capacitor circuit 100 and the three-phase switching conversion circuit 200 share a second switching component 20; the switching component includes the first switching component 10 and the second switching component 20.

[0028] The input terminal IN1 of the three-phase switched capacitor circuit 100 serves as the input terminal IN of the three-phase interleaved hybrid switched capacitor circuit 1000, used to connect the input voltage Vin. The first switching assembly 10 is electrically connected to the second switching assembly 20. The second switching assembly 20 is electrically connected to the first terminal of the first inductor L1, the first terminal of the second inductor L2, and the first terminal of the third inductor L3, respectively. The output terminal OUT1 of the three-phase switching conversion circuit 200 is electrically connected to the second terminal of the first inductor L1, the second terminal of the second inductor L2, and the second terminal of the third inductor L3, respectively, and serves as the output terminal OUT of the three-phase interleaved hybrid switched capacitor circuit 1000, used to output the output voltage Vout.

[0029] The switching assembly is used to control the electrical connection relationship between the first capacitor C1, the second capacitor C2, the third capacitor C3, the first inductor L1, the second inductor L2, and the third inductor L3 according to the received PWM control signal, so that the voltage conversion ratio of the three-phase switching capacitor circuit 100 is 3:1 and the voltage conversion ratio of the three-phase switching conversion circuit 200 is at least 3:1.

[0030] The three-phase interleaved hybrid switched capacitor circuit 1000 is used to convert the input voltage Vin into the output voltage Vout according to the duty cycle of the PWM control signal. The minimum voltage conversion ratio between the input voltage Vin and the output voltage Vout is 9:1.

[0031] The three-phase interleaved hybrid switched capacitor circuit in this application is a circuit module constructed using discrete components. This circuit can be applied in voltage converters to achieve voltage conversion between the input voltage Vin and the output voltage Vout. In one application scenario, the three-phase interleaved hybrid switched capacitor circuit converts the input voltage Vin into the output voltage Vout required for the normal operation of the artificial intelligence chip according to the voltage conversion ratio, and then provides power to the artificial intelligence chip through the output voltage Vout.

[0032] See Figure 1 The three-phase interleaved hybrid switched capacitor circuit 1000 in this embodiment is essentially a topology that cascades two-stage converters, with the output of the first-stage converter serving as the input of the second-stage converter. The first-stage converter is the three-phase switched capacitor circuit 100, and the second-stage converter is the three-phase switching converter circuit 200. The voltage conversion ratio of the three-phase switched capacitor circuit 100 is 3:1, which is a fixed voltage conversion ratio. The three-phase switching converter circuit 200 is essentially a step-down circuit (i.e., a BUCK circuit). Based on the voltage regulation effect of the first inductor L1, the second inductor L2, and the third inductor L3, the minimum achievable voltage conversion ratio of the three-phase switching converter circuit 200 is 3:1.

[0033] See Figure 1 Specifically, the three-phase switched capacitor circuit 100 may include a first switching component 10 and a first capacitor C1, a second capacitor C2, and a third capacitor C3; the three-phase switching conversion circuit 200 may include a first inductor L1, a second inductor L2, and a third inductor L3. Furthermore, the three-phase switched capacitor circuit 100 and the three-phase switching conversion circuit 200 share a second switching component 20. Thus, the three-phase switched capacitor circuit 100 includes the first switching component 10, the first capacitor C1, the second capacitor C2, the third capacitor C3, and the second switching component 20; the three-phase switching conversion circuit 200 includes the first inductor L1, the second inductor L2, the third inductor L3, and the second switching component 20.

[0034] In addition, the three-phase switching circuit 200 will operate the three phases alternately in the process of achieving a voltage conversion ratio of 3:1. During this process, each phase achieves a voltage conversion ratio of 3:1 through the first capacitor C1, the second capacitor C2, and the third capacitor C3.

[0035] Based on the technical solutions provided in the aforementioned related technologies, a three-phase interleaved hybrid switched capacitor architecture can be achieved by replicating a single-phase hybrid switched capacitor architecture three times. Correspondingly, the single-phase hybrid switched capacitor architecture consists of a front-end single-phase switched capacitor circuit and a rear-end single-phase switching conversion circuit. Therefore, the three-phase interleaved hybrid switched capacitor architecture can be achieved by replicating the single-phase switched capacitor circuit three times, and simultaneously replicating the single-phase switching conversion circuit three times. Using this scheme triples the number of components in both the single-phase switched capacitor circuit and the single-phase switching conversion circuit. In order to reduce the number of components used in the circuit and thus lower the system cost, this application sets the three-phase switched capacitor circuit 100 to share the second switching component 20 with the three-phase switching conversion circuit 200. Furthermore, the first capacitor C1, the second capacitor C2, and the third capacitor C3 in the three-phase switched capacitor circuit 100 are reused among the three phases. This reuse reduces the number of components in the three-phase interleaved hybrid switched capacitor circuit 1000 and further lowers the circuit cost.

[0036] See Figure 1 The switching components include a first switching component 10 and a second switching component 20. The first switching component 10 includes multiple switching transistors, and the second switching component 20 also includes multiple switching transistors. The input terminal IN of the three-phase interleaved hybrid switched capacitor circuit 1000 is used to connect the input voltage Vin. The input voltage Vin first passes through the three-phase switched capacitor circuit 100, which includes the first switching component 10, a first capacitor C1, a second capacitor C2, a third capacitor C3, and the second switching component 20. The first switching component 10 and the second switching component 20 are electrically connected. By controlling the switching state of each switching transistor in the first switching component 10 and the second switching component 20, the electrical connection relationship between the first capacitor C1, the second capacitor C2, and the third capacitor C3 can be controlled.

[0037] Then, the output voltage of the three-phase switched capacitor circuit 100 serves as the input voltage of the three-phase switch conversion circuit 200. The three-phase switch conversion circuit 200 includes a first inductor L1, a second inductor L2, a third inductor L3, and a second switching assembly 20. By controlling the switching states of each switching transistor in the second switching assembly 20, the electrical connection relationship between the first inductor L1, the second inductor L2, and the third inductor L3 is controlled. The output terminal OUT1 of the three-phase switch conversion circuit 200 serves as the output terminal OUT of the three-phase interleaved hybrid switched capacitor circuit 1000. After the input voltage Vin undergoes two stages of voltage conversion through the three-phase switched capacitor circuit 100 and the three-phase switch conversion circuit 200, the output voltage Vout is obtained and output based on the output terminal OUT of the three-phase interleaved hybrid switched capacitor circuit 1000.

[0038] The three-phase interleaved hybrid switched capacitor circuit 1000 in this application uses PWM control to achieve voltage conversion. That is, PWM control is used to control the output voltage of the three-phase switched capacitor circuit 100 with a fixed voltage conversion ratio. At the same time, PWM control is used to adjust the output voltage of the three-phase switching conversion circuit 200, thereby adjusting the voltage conversion ratio between the input voltage Vin and the output voltage Vout of the three-phase interleaved hybrid switched capacitor circuit 1000.

[0039] The PWM control signal controls the switching states of each switching transistor in the switching assembly, thereby controlling the electrical connections between the first capacitor C1, the second capacitor C2, the third capacitor C3, the first inductor L1, the second inductor L2, and the third inductor L3. This ensures that the voltage conversion ratio of the three-phase switched capacitor circuit 100 is a fixed value of 3:1. Based on the voltage regulation effect of the first inductor L1, the second inductor L2, and the third inductor L3, the voltage conversion ratio of the three-phase switching circuit 200 is adjustable, and the minimum voltage conversion ratio is 3:1. The three-phase interleaved hybrid switched capacitor circuit 1000 cascades a three-phase switched capacitor circuit 100 with a three-phase switching converter circuit 200. The voltage conversion ratio achievable by the three-phase interleaved hybrid switched capacitor circuit 1000 is the product of the voltage conversion ratio of the three-phase switched capacitor circuit 100 and the voltage conversion ratio of the three-phase switching converter circuit 200. With a voltage conversion ratio of 3:1 for the three-phase switched capacitor circuit 100 and a minimum voltage conversion ratio of 3:1 for the three-phase switching converter circuit 200, the minimum voltage conversion ratio achievable by the three-phase interleaved hybrid switched capacitor circuit 1000 is 9:1. By adjusting the duty cycle of the PWM control signal, the voltage conversion ratio of the three-phase interleaved hybrid switched capacitor circuit 1000 can be adjusted to achieve other ratios between 9:1 and ∞:1.

[0040] In this embodiment, the three-phase interleaved hybrid switched capacitor circuit includes: a three-phase switched capacitor circuit and a three-phase switching conversion circuit; the three-phase switched capacitor circuit includes a first switching component, a first capacitor, a second capacitor, and a third capacitor, and the first capacitor, second capacitor, and third capacitor are reused in the three phases of the three-phase switched capacitor circuit; the three-phase switching conversion circuit includes a first inductor, a second inductor, and a third inductor; the three-phase switched capacitor circuit and the three-phase switching conversion circuit share a second switching component; the switching component includes a first switching component and a second switching component; by configuring the three-phase switched capacitor circuit to reuse the second switching component with the three-phase switching conversion circuit, and for the three phases in the three-phase switched capacitor circuit, by... The capacitors in the three phases are reused to reduce the number of components in the three-phase interleaved hybrid switched capacitor circuit and further reduce the cost of the circuit. The specific electrical connection is as follows: the input terminal of the three-phase switched capacitor circuit serves as the input terminal of the three-phase interleaved hybrid switched capacitor circuit, which is used to connect the input voltage. The first switching assembly is electrically connected to the second switching assembly. The second switching assembly is electrically connected to the first terminal of the first inductor, the first terminal of the second inductor, and the first terminal of the third inductor, respectively. The output terminal of the three-phase switching conversion circuit is electrically connected to the second terminal of the first inductor, the second terminal of the second inductor, and the second terminal of the third inductor, respectively, and serves as the output terminal of the three-phase interleaved hybrid switched capacitor circuit, which is used to output the output voltage. The switching states of each switching transistor in the switching assembly are controlled by the PWM control signal, thereby controlling the electrical connections between the first capacitor, second capacitor, third capacitor, first inductor, second inductor, and third inductor. This ensures a voltage conversion ratio of 3:1 for the three-phase switched capacitor circuit, with a minimum voltage conversion ratio of 3:1 for the three-phase switching converter circuit. Based on the cascaded relationship between the three-phase switched capacitor circuit and the three-phase switching converter circuit, the three-phase interleaved hybrid switched capacitor circuit can convert the input voltage to the output voltage according to the duty cycle of the PWM control signal, with a minimum input-to-output voltage conversion ratio of 9:1. The three-phase interleaved hybrid switched capacitor circuit achieves a high voltage conversion ratio while simplifying the circuit, reducing the number of components, and further lowering costs.

[0041] In one possible embodiment, see Figure 1 The PWM control signals include: a first PWM control signal, a second PWM control signal, a third PWM control signal, a fourth PWM control signal, a fifth PWM control signal, a sixth PWM control signal, a seventh PWM control signal, an eighth PWM control signal, a ninth PWM control signal, a tenth PWM control signal, an eleventh PWM control signal, and a twelfth PWM control signal; the first switching assembly 10 may include: a first switching transistor Q1, a second switching transistor Q2, a third switching transistor Q3, a seventh switching transistor Q7, an eighth switching transistor Q8, and a ninth switching transistor Q9.

[0042] The second terminal of the first switching transistor Q1 is electrically connected to the second terminal of the second switching transistor Q2 and the second terminal of the third switching transistor Q3, and serves as the input terminal IN1 of the three-phase switched capacitor circuit 100, used to connect the input voltage Vin.

[0043] The first terminal of the first switch Q1 is electrically connected to the second terminal of the seventh switch Q7 and the first terminal of the first capacitor C1, respectively. The first terminal of the seventh switch Q7 is electrically connected to the first terminal of the third capacitor C3.

[0044] The first terminal of the second switch Q2 is electrically connected to the second terminal of the eighth switch Q8 and the first terminal of the second capacitor C2, respectively. The first terminal of the eighth switch Q8 is electrically connected to the second terminal of the first capacitor C1.

[0045] The first terminal of the third switch Q3 is electrically connected to the second terminal of the third capacitor C3 and the second terminal of the ninth switch Q9, respectively. The first terminal of the ninth switch Q9 is electrically connected to the second terminal of the second capacitor C2.

[0046] The control terminal of the first switch Q1 is used to receive the first PWM control signal, the control terminal of the second switch Q2 is used to receive the second PWM control signal, the control terminal of the third switch Q3 is used to receive the third PWM control signal, the control terminal of the seventh switch Q7 is used to receive the seventh PWM control signal, the control terminal of the eighth switch Q8 is used to receive the eighth PWM control signal, and the control terminal of the ninth switch Q9 is used to receive the ninth PWM control signal.

[0047] The first switch Q1, the second switch Q2, the third switch Q3, the seventh switch Q7, the eighth switch Q8, and the ninth switch Q9 can be any of the following: gallium nitride transistor, bipolar junction transistor, insulated gate bipolar transistor, metal-oxide-semiconductor field-effect transistor, field-controlled thyristor, gate turn-off thyristor, transmission gate, and back-to-back transistor.

[0048] For example, when the first switch Q1, the second switch Q2, the third switch Q3, the seventh switch Q7, the eighth switch Q8, and the ninth switch Q9 are bipolar transistors, their control terminal refers to the base of the bipolar transistor. The first terminal can be the collector or emitter of the bipolar transistor, and the corresponding second terminal can be the emitter or collector of the bipolar transistor. When the first switch Q1, the second switch Q2, the third switch Q3, the seventh switch Q7, the eighth switch Q8, and the ninth switch Q9 are field-effect transistors (FETs), their control terminal refers to the gate of the FET. The first terminal can be the drain or source of the FET, and the corresponding second terminal can be the source or drain of the FET.

[0049] In this application, the first switch Q1, the second switch Q2, the third switch Q3, the seventh switch Q7, the eighth switch Q8, and the ninth switch Q9 can be either N-type transistors or P-type transistors; this application does not impose any specific limitation on this.

[0050] When the first switch Q1, the second switch Q2, the third switch Q3, the seventh switch Q7, the eighth switch Q8, and the ninth switch Q9 are all N-type MOSFETs, the control terminals of the first switch Q1, the second switch Q2, the third switch Q3, the seventh switch Q7, the eighth switch Q8, and the ninth switch Q9 refer to the gates of the N-type MOSFETs. The first terminals of the first switch Q1, the second switch Q2, the third switch Q3, the seventh switch Q7, the eighth switch Q8, and the ninth switch Q9 are the sources of the N-type MOSFETs, and the corresponding second terminals of the first switch Q1, the second switch Q2, the third switch Q3, the seventh switch Q7, the eighth switch Q8, and the ninth switch Q9 are the drains of the N-type MOSFETs.

[0051] When the first switch Q1, the second switch Q2, the third switch Q3, the seventh switch Q7, the eighth switch Q8, and the ninth switch Q9 are all P-type MOSFETs, the control terminals of the first switch Q1, the second switch Q2, the third switch Q3, the seventh switch Q7, the eighth switch Q8, and the ninth switch Q9 refer to the gates of the P-type MOSFETs. The first terminals of the first switch Q1, the second switch Q2, the third switch Q3, the seventh switch Q7, the eighth switch Q8, and the ninth switch Q9 are the sources of the P-type MOSFETs, and the corresponding second terminals of the first switch Q1, the second switch Q2, the third switch Q3, the seventh switch Q7, the eighth switch Q8, and the ninth switch Q9 are the drains of the P-type MOSFETs.

[0052] In one possible embodiment, see Figure 1 The second switching assembly 20 may include: a fourth switch Q4, a fifth switch Q5, a sixth switch Q6, a tenth switch Q10, an eleventh switch Q11, and a twelfth switch Q12.

[0053] The second terminal of the tenth switch Q10 is electrically connected to the first terminal of the seventh switch Q7, and the first terminal of the tenth switch Q10 is electrically connected to the second terminal of the fourth switch Q4 and the first terminal of the first inductor L1.

[0054] The second terminal of the eleventh switch Q11 is electrically connected to the first terminal of the eighth switch Q8, and the first terminal of the eleventh switch Q11 is electrically connected to the second terminal of the fifth switch Q5 and the first terminal of the second inductor L2.

[0055] The second terminal of the twelfth switch Q12 is electrically connected to the first terminal of the ninth switch Q9, and the first terminal of the twelfth switch Q12 is electrically connected to the second terminal of the sixth switch Q6 and the first terminal of the third inductor L3.

[0056] The first terminal of the fourth switch Q4, the first terminal of the fifth switch Q5, and the first terminal of the sixth switch Q6 are all grounded.

[0057] The control terminal of the fourth switch Q4 is used to receive the fourth PWM control signal, the control terminal of the fifth switch Q5 is used to receive the fifth PWM control signal, the control terminal of the sixth switch Q6 is used to receive the sixth PWM control signal, the control terminal of the tenth switch Q10 is used to receive the tenth PWM control signal, the control terminal of the eleventh switch Q11 is used to receive the eleventh PWM control signal, and the control terminal of the twelfth switch Q12 is used to receive the twelfth PWM control signal.

[0058] Among them, the fourth switch Q4, the fifth switch Q5, the sixth switch Q6, the tenth switch Q10, the eleventh switch Q11, and the twelfth switch Q12 can be any one of gallium nitride transistors, bipolar junction transistors, insulated gate bipolar transistors, metal-oxide-semiconductor field-effect transistors, field-controlled thyristors, gate turn-off thyristors, transmission gates, and back-to-back transistors.

[0059] For example, when the fourth switch Q4, the fifth switch Q5, the sixth switch Q6, the tenth switch Q10, the eleventh switch Q11, and the twelfth switch Q12 are bipolar transistors, their control terminal refers to the base of the bipolar transistor. The first terminal can be the collector or emitter of the bipolar transistor, and the corresponding second terminal can be the emitter or collector of the bipolar transistor. When the fourth switch Q4, the fifth switch Q5, the sixth switch Q6, the tenth switch Q10, the eleventh switch Q11, and the twelfth switch Q12 are field-effect transistors (FETs), their control terminal refers to the gate of the FET. The first terminal can be the drain or source of the FET, and the corresponding second terminal can be the source or drain of the FET.

[0060] In this application, the fourth switch Q4, the fifth switch Q5, the sixth switch Q6, the tenth switch Q10, the eleventh switch Q11, and the twelfth switch Q12 can be either N-type transistors or P-type transistors; this application does not impose any specific limitation on this.

[0061] When the fourth switch Q4, fifth switch Q5, sixth switch Q6, tenth switch Q10, eleventh switch Q11, and twelfth switch Q12 are all N-type MOSFETs, the control terminal of the fourth switch Q4, fifth switch Q5, sixth switch Q6, tenth switch Q10, eleventh switch Q11, and twelfth switch Q12 refers to the gate of the N-type MOSFET. The first terminal of the fourth switch Q4, fifth switch Q5, sixth switch Q6, tenth switch Q10, eleventh switch Q11, and twelfth switch Q12 is the source of the N-type MOSFET, and the corresponding second terminal of the fourth switch Q4, fifth switch Q5, sixth switch Q6, tenth switch Q10, eleventh switch Q11, and twelfth switch Q12 is the drain of the N-type MOSFET.

[0062] When the fourth switch Q4, fifth switch Q5, sixth switch Q6, tenth switch Q10, eleventh switch Q11, and twelfth switch Q12 are all P-type MOSFETs, the control terminal of the fourth switch Q4, fifth switch Q5, sixth switch Q6, tenth switch Q10, eleventh switch Q11, and twelfth switch Q12 refers to the gate of the P-type MOSFET. The first terminal of the fourth switch Q4, fifth switch Q5, sixth switch Q6, tenth switch Q10, eleventh switch Q11, and twelfth switch Q12 is the source of the P-type MOSFET, and the corresponding second terminal of the fourth switch Q4, fifth switch Q5, sixth switch Q6, tenth switch Q10, eleventh switch Q11, and twelfth switch Q12 is the drain of the P-type MOSFET.

[0063] In one possible embodiment, see Figure 1 The three-phase interleaved hybrid switched capacitor circuit 1000 also includes: a fourth capacitor C4.

[0064] The first terminal of the fourth capacitor C4 is electrically connected to the output terminal OUT of the three-phase interleaved hybrid switching capacitor circuit 1000, and the second terminal of the fourth capacitor C4 is grounded.

[0065] The fourth capacitor C4 is used to filter the output voltage Vout output from the output terminal OUT of the three-phase interleaved hybrid switched capacitor circuit 1000, so as to reduce the fluctuation of the output voltage Vout and reduce the ripple of the output voltage Vout.

[0066] See Figure 1The three-phase switched capacitor circuit 100 in the three-phase interleaved hybrid switched capacitor circuit 1000 can achieve a three-phase voltage conversion ratio of 3:1. The three-phase switched capacitor circuit 100 specifically includes: a first switch Q1, a second switch Q2, a third switch Q3, a fourth switch Q4, a fifth switch Q5, a sixth switch Q6, a seventh switch Q7, an eighth switch Q8, a ninth switch Q9, a tenth switch Q10, an eleventh switch Q11, a twelfth switch Q12, a first capacitor C1, a second capacitor C2, and a third capacitor C3. Correspondingly, the three-phase switched capacitor circuit 100 can be divided into three single-phase switched capacitor circuits. The first switch Q1, the seventh switch Q7, the tenth switch Q10, the fourth switch Q4, and the first capacitor C1 form phase A; the second switch Q2, the eighth switch Q8, the eleventh switch Q11, the fifth switch Q5, and the second capacitor C2 form phase B; and the third switch Q3, the ninth switch Q9, the twelfth switch Q12, the sixth switch Q6, and the third capacitor C3 form phase C. Phases A, B, and C constitute three phases. For a three-phase interleaved mixed switched capacitor circuit, it is necessary to control the interleaved operation of phases A, B, and C. For example, by controlling the phase difference between phases A, B, and C to be 120°, that is, the phase difference between phase A and phase B is 120°, the phase difference between phase B and phase C is 120°, and the phase difference between phase C and phase A is 120°.

[0067] See Figure 1 The three-phase switching circuit 200 in the three-phase interleaved hybrid switched capacitor circuit 1000 can achieve a minimum three-phase voltage conversion ratio of 3:1. The three-phase switching circuit 200 specifically includes: a fourth switch Q4, a fifth switch Q5, a sixth switch Q6, a tenth switch Q10, an eleventh switch Q11, a twelfth switch Q12, a first inductor L1, a second inductor L2, and a third inductor L3. Correspondingly, the three-phase switching circuit 200 can be divided into three single-phase switching circuits. Among them, the fourth switch Q4, the tenth switch Q10, and the first inductor L1 form phase A; the fifth switch Q5, the eleventh switch Q11, and the second inductor L2 form phase B; and the sixth switch Q6, the twelfth switch Q12, and the third inductor L3 form phase C. Similarly, phases A, B, and C constitute three phases. For a three-phase interleaved hybrid switched capacitor circuit, it is necessary to control phases A, B, and C to operate in an interleaved manner. For example, by controlling the phase difference between phases A, B, and C to be 120°, that is, the phase difference between phase A and phase B is 120°, the phase difference between phase B and phase C is 120°, and the phase difference between phase C and phase A is 120°. Figure 1 In the diagram, node A is the connection point between the first inductor L1 and phase A, node B is the connection point between the second inductor L2 and phase B, and node C is the connection point between the third inductor L3 and phase C.

[0068] See Figure 1 The three-phase switched capacitor circuit 100 and the three-phase switched conversion circuit 200 share the fourth switch Q4, the fifth switch Q5, the sixth switch Q6, the tenth switch Q10, the eleventh switch Q11, and the twelfth switch Q12.

[0069] In one possible embodiment, the switching component is used to control its own switching transistors to switch between a first mode, a second mode, a third mode, a fourth mode, a fifth mode, and a sixth mode in a cycle according to the received PWM control signal, so that the voltage conversion ratio of the three-phase switched capacitor circuit 100 is 3:1 and the voltage conversion ratio of the three-phase switching circuit 200 is 3:1.

[0070] A three-phase interleaved hybrid switched capacitor circuit 1000 is used to convert the input voltage Vin into the output voltage Vout, with a voltage conversion ratio of 9:1 between the input voltage Vin and the output voltage Vout.

[0071] In this embodiment, the three-phase interleaved hybrid switched capacitor circuit sequentially switches between the first mode, the second mode, the third mode, the fourth mode, the fifth mode, and the sixth mode within one cycle, so that the voltage conversion ratio of the three-phase switched capacitor circuit 100 is 3:1 and the voltage conversion ratio of the phase switching circuit 200 is 3:1, so that the three-phase interleaved hybrid switched capacitor circuit 1000 converts the input voltage Vin into the output voltage Vout according to a voltage conversion ratio of 9:1.

[0072] Specifically, in one possible embodiment, see [link to relevant documentation]. Figure 1 In the first mode, the first switch Q1, the fourth switch Q4, the fifth switch Q5, the eighth switch Q8, the ninth switch Q9, the tenth switch Q10 and the twelfth switch Q12 are all in the on state, and the second switch Q2, the third switch Q3, the sixth switch Q6, the seventh switch Q7 and the eleventh switch Q11 are all in the off state.

[0073] Referring to Figure 2(a), Figure 2(a) is a schematic diagram of the equivalent circuit structure of a first mode provided in an embodiment of this application. As shown in Figure 2(a), when the first switch Q1, the fourth switch Q4, the fifth switch Q5, the eighth switch Q8, the ninth switch Q9, the tenth switch Q10, and the twelfth switch Q12 are all in the on state, and the second switch Q2, the third switch Q3, the sixth switch Q6, the seventh switch Q7, and the eleventh switch Q11 are all in the off state, that is, in the first mode, the electrical connection relationship between the first capacitor C1, the second capacitor C2, the third capacitor C3, the first inductor L1, the second inductor L2, and the third inductor L3 is as follows: the first capacitor C1's first... The input voltage Vin is connected to the terminal. The second terminal of the first capacitor C1 is electrically connected to the first terminal of the second capacitor C2. The second terminal of the second capacitor C2 is electrically connected to the first terminal of the third capacitor C3. The second terminal of the third capacitor C3 is grounded. The first terminal of the first inductor L1 (i.e., node A) is grounded. The first terminal of the second inductor L2 (i.e., node B) is grounded. The first terminal of the third inductor L3 (i.e., node C) is electrically connected to the first terminal of the third capacitor C3. The second terminal of the first inductor L1 is electrically connected to the second terminal of the second inductor L2, the second terminal of the third inductor L3, and the first terminal of the fourth capacitor C4, and serves as the output terminal of the three-phase interleaved hybrid switched capacitor circuit to output the output voltage Vout. The second terminal of the fourth capacitor C4 is grounded.

[0074] In the first mode, the first capacitor C1, the second capacitor C2, and the third capacitor C3 are connected in series between the input voltage Vin and ground. In a steady state, the voltage across each capacitor is 1 / 3 of the input voltage Vin, i.e., Vin / 3. At this time, the voltage conversion ratio of the three-phase switched capacitor circuit 100 is 3:1. Since node C is electrically connected to the first terminal of the third capacitor C3, the current flowing through the third inductor L3 increases. Since nodes A and B are grounded, the current flowing through the first inductor L1 and the second inductor L2 decreases. At this time, the voltage conversion ratio of phase C in the three-phase switching converter circuit 200 is 3:1. In the first mode, the three-phase switched capacitor circuit 100 and the three-phase switching converter circuit 200 are cascaded, so that phase C in the three-phase interleaved hybrid switched capacitor circuit 1000 converts the input voltage Vin to the output voltage Vout according to a voltage conversion ratio of 9:1.

[0075] In the first mode, for the three-phase switched capacitor circuit 100, the first capacitor C1, the second capacitor C2, and the third capacitor C3 are used to charge the voltage across their terminals to 1 / 3 of the input voltage Vin in a steady state; for the three-phase switching converter circuit 200, the third capacitor C3 is also used to use the voltage across its terminals (i.e., 1 / 3 of the input voltage Vin) as the input voltage of the three-phase switching converter circuit 200 in phase C, so that phase C in the three-phase interleaved hybrid switched capacitor circuit 1000 converts the input voltage Vin into the output voltage Vout according to a voltage conversion ratio of 9:1.

[0076] See Figure 1 In the second mode, the fourth switch Q4, the fifth switch Q5, the sixth switch Q6, the ninth switch Q9 and the tenth switch Q10 are all in the on state, and the first switch Q1, the second switch Q2, the third switch Q3, the seventh switch Q7, the eighth switch Q8, the eleventh switch Q11 and the twelfth switch Q12 are all in the off state.

[0077] Referring to Figure 2(b), which is a schematic diagram of the equivalent circuit structure of a second mode provided in an embodiment of this application, as shown in Figure 2(b), when the fourth switch Q4, the fifth switch Q5, the sixth switch Q6, the ninth switch Q9, and the tenth switch Q10 are all in the on state, and the first switch Q1, the second switch Q2, the third switch Q3, the seventh switch Q7, the eighth switch Q8, the eleventh switch Q11, and the twelfth switch Q12 are all in the off state, that is, in the second mode, the first capacitor C1, the second capacitor C2, the third capacitor C3, the first inductor L1, and the second capacitor C2 are all in the off state. The electrical connection between inductor L2 and third inductor L3 is as follows: the first and second ends of the first capacitor C1 are both floating, the first end of the second capacitor C2 is floating, the second end of the second capacitor C2 is electrically connected to the first end of the third capacitor C3, and the second end of the third capacitor C3 is grounded; the first end of the first inductor L1 (i.e., node A) is grounded, the first end of the second inductor L2 (i.e., node B) is grounded, the first end of the third inductor L3 (i.e., node C) is grounded, the second end of the first inductor L1 is electrically connected to the second end of the second inductor L2, the second end of the third inductor L3, and the first end of the fourth capacitor C4, respectively, and the second end of the fourth capacitor C4 is grounded.

[0078] In the second mode, the three-phase switched capacitor circuit 100 is disconnected from the three-phase switching converter circuit 200, and nodes A, B, and C are all grounded. Therefore, the currents flowing through the first inductor L1, the second inductor L2, and the third inductor L3 all show a decreasing trend. In the second mode, the three-phase switched capacitor circuit 100 and the three-phase switching converter circuit 200 are not cascaded, and the three-phase interleaved hybrid switched capacitor circuit 1000 does not perform the conversion between the input voltage Vin and the output voltage Vout.

[0079] See Figure 1 In the third mode, the second switch Q2, the fifth switch Q5, the sixth switch Q6, the seventh switch Q7, the ninth switch Q9, the tenth switch Q10 and the eleventh switch Q11 are all turned on, and the first switch Q1, the third switch Q3, the fourth switch Q4, the eighth switch Q8 and the twelfth switch Q12 are all turned off.

[0080] Referring to Figure 2(c), which is a schematic diagram of the equivalent circuit structure of a third mode provided in an embodiment of this application, as shown in Figure 2(c), when the second switch Q2, the fifth switch Q5, the sixth switch Q6, the seventh switch Q7, the ninth switch Q9, the tenth switch Q10, and the eleventh switch Q11 are all in the on state, and the first switch Q1, the third switch Q3, the fourth switch Q4, the eighth switch Q8, and the twelfth switch Q12 are all in the off state, that is, in the third mode, the electrical connection relationship between the first capacitor C1, the second capacitor C2, the third capacitor C3, the first inductor L1, the second inductor L2, and the third inductor L3 is as follows: the first capacitor C2... The input voltage Vin is connected to the terminal. The second terminal of the second capacitor C2 is electrically connected to the first terminal of the third capacitor C3. The second terminal of the third capacitor C3 is electrically connected to the first terminal of the first capacitor C1. The second terminal of the first capacitor C1 is grounded. The first terminal of the second inductor L2 (i.e., node B) is grounded. The first terminal of the third inductor L3 (i.e., node C) is grounded. The first terminal of the first inductor L1 (i.e., node A) is electrically connected to the first terminal of the first capacitor C1. The second terminal of the first inductor L1 is electrically connected to the second terminal of the second inductor L2, the second terminal of the third inductor L3, and the first terminal of the fourth capacitor C4, and serves as the output terminal of the three-phase interleaved hybrid switched capacitor circuit to output the output voltage Vout. The second terminal of the fourth capacitor C4 is grounded.

[0081] In the third mode, the first capacitor C1, the second capacitor C2, and the third capacitor C3 are connected in series between the input voltage Vin and ground. In a steady state, the voltage across each capacitor is 1 / 3 of the input voltage Vin, i.e., Vin / 3. At this time, the voltage conversion ratio of the three-phase switched capacitor circuit 100 is 3:1. Since node A is electrically connected to the first terminal of the first capacitor C1, the current flowing through the first inductor L1 increases. Since nodes B and C are grounded, the current flowing through the second inductor L2 and the third inductor L3 decreases. At this time, the voltage conversion ratio of phase A in the three-phase switching converter circuit 200 is 3:1. In the third mode, the three-phase switched capacitor circuit 100 and the three-phase switching converter circuit 200 are cascaded, so that phase A of the three-phase interleaved hybrid switched capacitor circuit 1000 converts the input voltage Vin to the output voltage Vout according to a voltage conversion ratio of 9:1.

[0082] In the third mode, for the three-phase switched capacitor circuit 100, the first capacitor C1, the second capacitor C2, and the third capacitor C3 are used to charge the voltage across their terminals to 1 / 3 of the input voltage Vin in the steady state; for the three-phase switching converter circuit 200, the first capacitor C1 is also used to use the voltage across its terminals (i.e., 1 / 3 of the input voltage Vin) as the input voltage of the three-phase switching converter circuit 200 in phase A, so that phase A in the three-phase interleaved hybrid switched capacitor circuit 1000 converts the input voltage Vin into the output voltage Vout according to a voltage conversion ratio of 9:1.

[0083] See Figure 1 In the fourth mode, the fourth switch Q4, the fifth switch Q5, the sixth switch Q6, the seventh switch Q7 and the eleventh switch Q11 are all in the on state, and the first switch Q1, the second switch Q2, the third switch Q3, the eighth switch Q8, the ninth switch Q9, the tenth switch Q10 and the twelfth switch Q12 are all in the off state.

[0084] Referring to Figure 2(d), which is a schematic diagram of the equivalent circuit structure of a fourth mode provided in an embodiment of this application, as shown in Figure 2(d), when the fourth switch Q4, the fifth switch Q5, the sixth switch Q6, the seventh switch Q7, and the eleventh switch Q11 are all in the on state, and the first switch Q1, the second switch Q2, the third switch Q3, the eighth switch Q8, the ninth switch Q9, the tenth switch Q10, and the twelfth switch Q12 are all in the off state, that is, in the fourth mode, the first capacitor C1, the second capacitor C2, the third capacitor C3, the first inductor L1, and the second capacitor C2 are all in the off state. The electrical connection between inductor L2 and third inductor L3 is as follows: the first and second ends of the second capacitor C2 are both floating; the first end of the first capacitor C1 is floating; the second end of the first capacitor C1 is electrically connected to the first end of the third capacitor C3; the second end of the third capacitor C3 is floating; the first end of the first inductor L1 (i.e., node A) is grounded; the first end of the second inductor L2 (i.e., node B) is grounded; the first end of the third inductor L3 (i.e., node C) is grounded; the second end of the first inductor L1 is electrically connected to the second end of the second inductor L2, the second end of the third inductor L3, and the first end of the fourth capacitor C4; the second end of the fourth capacitor C4 is grounded.

[0085] In the fourth mode, the three-phase switched capacitor circuit 100 is disconnected from the three-phase switching converter circuit 200, and nodes A, B, and C are all grounded. Therefore, the currents flowing through the first inductor L1, the second inductor L2, and the third inductor L3 all show a decreasing trend. In the fourth mode, the three-phase switched capacitor circuit 100 and the three-phase switching converter circuit 200 are not cascaded, and the three-phase interleaved hybrid switched capacitor circuit 1000 does not perform the conversion between the input voltage Vin and the output voltage Vout.

[0086] See Figure 1 In the fifth mode, the third switch Q3, the fourth switch Q4, the sixth switch Q6, the seventh switch Q7, the eighth switch Q8, the eleventh switch Q11 and the twelfth switch Q12 are all in the on state, and the first switch Q1, the second switch Q2, the fifth switch Q5, the ninth switch Q9 and the tenth switch Q10 are all in the off state.

[0087] Referring to Figure 2(e), which is a schematic diagram of the equivalent circuit structure of a fifth mode provided in an embodiment of this application, as shown in Figure 2(e), when the third switch Q3, the fourth switch Q4, the sixth switch Q6, the seventh switch Q7, the eighth switch Q8, the eleventh switch Q11, and the twelfth switch Q12 are all in the on state, and the first switch Q1, the second switch Q2, the fifth switch Q5, the ninth switch Q9, and the tenth switch Q10 are all in the off state, that is, in the fifth mode, the electrical connection relationship between the first capacitor C1, the second capacitor C2, the third capacitor C3, the first inductor L1, the second inductor L2, and the third inductor L3 is as follows: the first capacitor C3... The input voltage Vin is connected to the terminal. The second terminal of the third capacitor C3 is electrically connected to the first terminal of the first capacitor C1. The second terminal of the first capacitor C1 is electrically connected to the first terminal of the second capacitor C2. The second terminal of the second capacitor C2 is grounded. The first terminal of the first inductor L1 (i.e., node A) is grounded. The first terminal of the third inductor L3 (i.e., node C) is grounded. The first terminal of the second inductor L2 (i.e., node B) is electrically connected to the first terminal of the second capacitor C2. The second terminal of the first inductor L1 is electrically connected to the second terminal of the second inductor L2, the second terminal of the third inductor L3, and the first terminal of the fourth capacitor C4, and serves as the output terminal of the three-phase interleaved hybrid switched capacitor circuit to output the output voltage Vout. The second terminal of the fourth capacitor C4 is grounded.

[0088] In the fifth mode, the first capacitor C1, the second capacitor C2, and the third capacitor C3 are connected in series between the input voltage Vin and ground. In a steady state, the voltage across each capacitor is 1 / 3 of the input voltage Vin, i.e., Vin / 3. At this time, the voltage conversion ratio of the three-phase switched capacitor circuit 100 is 3:1. Since node B is electrically connected to the first terminal of the second capacitor C2, the current flowing through the second inductor L2 increases. Since nodes A and C are grounded, the current flowing through the first inductor L1 and the third inductor L3 decreases. At this time, the voltage conversion ratio of phase B in the three-phase switching converter circuit 200 is 3:1. In the fifth mode, the three-phase switched capacitor circuit 100 and the three-phase switching converter circuit 200 are cascaded, so that phase B in the three-phase interleaved hybrid switched capacitor circuit 1000 converts the input voltage Vin to the output voltage Vout according to a voltage conversion ratio of 9:1.

[0089] In the fifth mode, for the three-phase switched capacitor circuit 100, the first capacitor C1, the second capacitor C2, and the third capacitor C3 are used to charge the voltage across their terminals to 1 / 3 of the input voltage Vin in the steady state; for the three-phase switching converter circuit 200, the second capacitor C2 is also used to use the voltage across its terminals (i.e., 1 / 3 of the input voltage Vin) as the input voltage of the three-phase switching converter circuit 200 in phase B, so that phase B in the three-phase interleaved hybrid switched capacitor circuit 1000 converts the input voltage Vin into the output voltage Vout according to a voltage conversion ratio of 9:1.

[0090] See Figure 1 In the sixth mode, the fourth switch Q4, the fifth switch Q5, the sixth switch Q6, the eighth switch Q8 and the twelfth switch Q12 are all in the on state, and the first switch Q1, the second switch Q2, the third switch Q3, the seventh switch Q7, the ninth switch Q9, the tenth switch Q10 and the eleventh switch Q11 are all in the off state.

[0091] Referring to Figure 2(f), which is a schematic diagram of the equivalent circuit structure of a sixth mode provided in an embodiment of this application, as shown in Figure 2(f), when the fourth switch Q4, the fifth switch Q5, the sixth switch Q6, the eighth switch Q8, and the twelfth switch Q12 are all in the on state, and the first switch Q1, the second switch Q2, the third switch Q3, the seventh switch Q7, the ninth switch Q9, the tenth switch Q10, and the eleventh switch Q11 are all in the off state, that is, in the sixth mode, the first capacitor C1, the second capacitor C2, the third capacitor C3, the first inductor L1, and the second inductor L2 are all in the off state. The electrical connection between L2 and the third inductor L3 is as follows: the first and second ends of the third capacitor C3 are both floating; the first end of the first capacitor C1 is floating; the second end of the first capacitor C1 is electrically connected to the first end of the second capacitor C2; the second end of the second capacitor C2 is floating; the first end of the first inductor L1 (i.e., node A) is grounded; the first end of the second inductor L2 (i.e., node B) is grounded; the first end of the third inductor L3 (i.e., node C) is grounded; the second end of the first inductor L1 is electrically connected to the second end of the second inductor L2, the second end of the third inductor L3, and the first end of the fourth capacitor C4; the second end of the fourth capacitor C4 is grounded.

[0092] In the sixth mode, the three-phase switched capacitor circuit 100 is disconnected from the three-phase switching converter circuit 200, and nodes A, B, and C are all grounded. Therefore, the currents flowing through the first inductor L1, the second inductor L2, and the third inductor L3 all show a decreasing trend. In the sixth mode, the three-phase switched capacitor circuit 100 and the three-phase switching converter circuit 200 are not cascaded, and the three-phase interleaved hybrid switched capacitor circuit 1000 does not perform the conversion between the input voltage Vin and the output voltage Vout.

[0093] Based on the above description of the first mode, the third mode, and the fifth mode, the three-phase switched capacitor circuit 100 reuses the first capacitor C1, the second capacitor C2, and the third capacitor C3 in the three phases. By reusing the first capacitor C1, the second capacitor C2, and the third capacitor C3, the number of components in the circuit can be reduced.

[0094] Each switch in the control switching assembly sequentially switches between the first mode, second mode, third mode, fourth mode, fifth mode, and sixth mode within one cycle, so that the voltage conversion ratio of the three-phase switched capacitor circuit 100 is 3:1 and the voltage conversion ratio of the three-phase switching converter circuit 200 is 3:1. Therefore, the three-phase interleaved hybrid switched capacitor circuit sequentially switches between the first mode, second mode, third mode, fourth mode, fifth mode, and sixth mode within one cycle, so that the three phases (i.e., phase A, phase B, and phase C) in the three-phase interleaved hybrid switched capacitor circuit 1000 convert the input voltage Vin into the output voltage Vout according to a voltage conversion ratio of 9:1.

[0095] In one possible embodiment, when the control terminal of the first switch Q1 receives the first PWM control signal, the control terminal of the second switch Q2 receives the second PWM control signal by lagging the phase of the first PWM control signal by 120°, and the control terminal of the third switch Q3 receives the third PWM control signal by lagging the phase of the first PWM control signal by 240°.

[0096] The switching state of the fourth switch Q4 is complementary to the switching state of the second switch Q2, the switching state of the fifth switch Q5 is complementary to the switching state of the third switch Q3, and the switching state of the sixth switch Q6 is complementary to the switching state of the first switch Q1. The complementary state means that when one switch is in the on state, the other switch is in the off state.

[0097] The switching state of the seventh switch Q7 is the same as that of the eleventh switch Q11, and the duration of the on state is equal to the time from the start of the on state of the second switch Q2 to the start of the off state of the third switch Q3.

[0098] The switching state of the ninth switch Q9 is the same as that of the tenth switch Q10, and the duration of the on state is equal to the time from the start of the on state of the first switch Q1 to the start of the off state of the second switch Q2.

[0099] The switching state of the eighth switch Q8 is the same as that of the twelfth switch Q12, and the duration of the on state is equal to the time from the start of the on state of the third switch Q3 to the start of the off state of the first switch Q1.

[0100] In this embodiment, the switching states of each switch in the switching assembly are controlled by PWM control signals. Specifically, the first PWM control signal controls the switching state of the first switch Q1, the second PWM control signal controls the switching state of the second switch Q2, the third PWM control signal controls the switching state of the third switch Q3, the fourth PWM control signal controls the switching state of the fourth switch Q4, the fifth PWM control signal controls the switching state of the fifth switch Q5, the sixth PWM control signal controls the switching state of the sixth switch Q6, the seventh PWM control signal controls the switching state of the seventh switch Q7, the eighth PWM control signal controls the switching state of the eighth switch Q8, the ninth PWM control signal controls the switching state of the ninth switch Q9, the tenth PWM control signal controls the switching state of the tenth switch Q10, the eleventh PWM control signal controls the switching state of the eleventh switch Q11, and the twelfth PWM control signal controls the switching state of the twelfth switch Q12.

[0101] Each PWM control signal in this application is referenced to the first PWM control signal. The duty cycle of the first PWM control signal refers to the proportion of the on-time within one cycle. Similarly, the duty cycles of the other PWM control signals also refer to the proportion of the on-time of that signal within one cycle.

[0102] The first, second, and third PWM control signals have the same duty cycle. When the rising edge of the first PWM control signal is used as a reference, the rising edge of the second PWM control signal lags behind the rising edge of the first PWM control signal by 120°, and the rising edge of the third PWM control signal lags behind the rising edge of the first PWM control signal by 240°. (See also...) Figure 3 , Figure 3 A waveform diagram of a three-phase interleaved hybrid switched capacitor circuit provided in an embodiment of this application is shown below. Figure 3 As shown, the high level of each switch corresponds to the on state of that switch. Since the duty cycles of the first PWM control signal, the second PWM control signal, and the third PWM control signal are the same, and their phases differ by 120°, then... Figure 3 The first switch Q1, the second switch Q2, and the third switch Q3 in the circuit have the same conduction time and a phase difference of 120° within one cycle. Figure 3 In the diagram, ① represents the first mode, ② represents the second mode, ③ represents the third mode, ④ represents the fourth mode, ⑤ represents the fifth mode, and ⑥ represents the sixth mode.

[0103] See Figure 3 Given the first, second, and third PWM control signals, the switching state of the fourth switch Q4 is complementary to that of the second switch Q2. That is, the switching state of the fourth switch Q4 can be obtained based on the switching state of the second switch Q2, and thus the fourth PWM control signal can be obtained from the second PWM control signal. Similarly, the switching state of the fifth switch Q5 is complementary to that of the third switch Q3. That is, the switching state of the fifth switch Q5 can be obtained based on the switching state of the third switch Q3, and thus the fifth PWM control signal can be obtained from the third PWM control signal. Likewise, the switching state of the sixth switch Q6 is complementary to that of the first switch Q1. That is, the switching state of the sixth switch Q6 can be obtained based on the switching state of the first switch Q1, and thus the seventh PWM control signal can be obtained from the first PWM control signal.

[0104] See Figure 3Based on this, the switching state of the seventh switch Q7 is consistent with the switching state of the eleventh switch Q11, and the duration of the conduction state is equal to the time from the start of the conduction state of the second switch Q2 to the start of the turn-off state of the third switch Q3. Therefore, based on the switching states of the second switch Q2 and the third switch Q3, the switching states of the seventh switch Q7 and the eleventh switch Q11 can be obtained. That is, the seventh PWM control signal and the eleventh PWM control signal can be obtained according to the second PWM control signal and the third PWM control signal.

[0105] See Figure 3 Similarly, the switching state of the ninth switch Q9 is the same as that of the tenth switch Q10, and the duration of the on state is equal to the time from the start of the on state of the first switch Q1 to the start of the off state of the second switch Q2. Therefore, based on the switching states of the first switch Q1 and the second switch Q2, the switching states of the ninth switch Q9 and the tenth switch Q10 can be obtained. That is, the ninth PWM control signal and the tenth PWM control signal can be obtained according to the first PWM control signal and the second PWM control signal.

[0106] See Figure 3 The switching state of the eighth switch Q8 is consistent with the switching state of the twelfth switch Q12, and the duration of the conduction state is equal to the time from the start of the conduction state of the third switch Q3 to the start of the turn-off state of the first switch Q1. Therefore, based on the switching states of the first switch Q1 and the third switch Q3, the switching states of the eighth switch Q8 and the twelfth switch Q12 can be obtained. That is, the eighth PWM control signal and the twelfth PWM control signal can be obtained according to the first PWM control signal and the third PWM control signal.

[0107] When a three-phase interleaved hybrid switched capacitor circuit sequentially switches between the first mode, second mode, third mode, fourth mode, fifth mode, and sixth mode within one cycle, the switching states of each switching transistor are as follows: Figure 3 The switching states of each switch shown are consistent in the first mode, second mode, third mode, fourth mode, fifth mode, and sixth mode, so that the three-phase interleaved hybrid switched capacitor circuit 1000 converts the input voltage Vin into the output voltage Vout according to a voltage conversion ratio of 9:1. Figure 3 i in L1 i represents the current flowing through the first inductor L1. L2 i represents the current flowing through the second inductor L2. L3 This represents the current flowing through the third inductor L3.

[0108] When the voltage conversion ratio of the three-phase switched capacitor circuit 100 is 3:1, the relationship between the input voltage Vin and the output voltage Vout is: Vin:Vout=3 / D, where D is the duty cycle of the first PWM control signal. When D is less than or equal to 1 / 3, Vin:Vout≧9:1. Therefore, by adjusting the duty cycle of the first PWM control signal, the voltage conversion ratio between the input voltage Vin and the output voltage Vout can be reduced to a minimum of 9:1. For example, by adjusting the duty cycle of the first PWM control signal, the voltage conversion ratio between the input voltage Vin and the output voltage Vout can be 10:1 or 12:1.

[0109] In this embodiment, based on the relationship between the various PWM control signals, the duty cycle of the first PWM control signal is adjusted so that the duty cycles of other PWM control signals are adaptively adjusted. This enables the three-phase interleaved hybrid switched capacitor circuit 1000 to convert the input voltage Vin into the output voltage Vout according to other voltage conversion ratios, achieving a minimum voltage conversion ratio of 9:1 between the input voltage Vin and the output voltage Vout.

[0110] In one possible embodiment, the inductor assembly includes: a first inductor L1, a second inductor L2, and a third inductor L3; the inductor assembly is a three-phase coupled inductor.

[0111] The first inductor L1, the second inductor L2, and the third inductor L3 can be three independent devices, or they can be replaced by an integrated three-phase coupled inductor. Choosing a three-phase coupled inductor can further reduce the board area of ​​the three-phase interleaved hybrid switched capacitor circuit 1000.

[0112] To address the issues of current stress concentration and hot spots that may arise in single-phase hybrid switched capacitor architecture voltage converters (i.e., single-phase HSC architecture) under high-load application scenarios, the three-phase interleaved hybrid switched capacitor circuit 1000 in this application uses a three-phase interleaved control method to distribute the current flowing through the load evenly to each phase of the interleaved hybrid switched capacitor circuit. In other words, the current stress of each device in each phase of the interleaved hybrid switched capacitor circuit can be reduced through the three-phase current sharing design.

[0113] Referring to Figure 4(a), Figure 4(a) is a current waveform diagram of a three-phase interleaved hybrid switched capacitor circuit provided in this application under steady state. As shown in Figure 4(a), when the three-phase interleaved hybrid switched capacitor circuit is working in steady state, the current flowing through its three-phase inductors (i.e., the first inductor L1, the second inductor L2, and the third inductor L3) (i.e., the current i on the first inductor L1) is... L1 The current i on the second inductor L2 L2The current i on the third inductor L3 L3 The average values ​​of the three phases are the same, meaning that the three-phase interleaved hybrid switched capacitor circuit has a good current sharing effect when operating in steady state.

[0114] Referring to Figure 4(b), Figure 4(b) is a current waveform diagram of a three-phase interleaved hybrid switched capacitor circuit provided in the embodiment of this application during transient operation. As shown in Figure 4(b), when the three-phase interleaved hybrid switched capacitor circuit is operating in transient mode, the current flowing through its three-phase inductors (i.e., the first inductor L1, the second inductor L2, and the third inductor L3) (i.e., the current i on the first inductor L1) is... L1 The current i on the second inductor L2 L2 The current i on the third inductor L3 L3 The average values ​​are the same, meaning that the three-phase interleaved hybrid switched capacitor circuit also has a good current sharing effect when operating in transient mode.

[0115] This application also provides a voltage converter, which includes a three-phase interleaved hybrid switched capacitor circuit as described above.

[0116] The voltage converter includes the three-phase interleaved hybrid switched capacitor circuit provided in the above embodiment, which is used to realize the conversion between input voltage and output voltage. For example, the voltage converter converts 48V voltage to 1V voltage to provide power to the artificial intelligence chip.

[0117] This application also provides an electronic device, including: a voltage converter as described above.

[0118] Electronic devices may include, but are not limited to: adapters, chargers, robots, tablets, smart home devices, vehicles, and wearable devices.

[0119] 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 covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A three-phase interleaved hybrid switched capacitor circuit, characterized in that, The three-phase interleaved hybrid switched capacitor circuit includes: a three-phase switched capacitor circuit and a three-phase switching conversion circuit; the three-phase switched capacitor circuit includes a first switching component, a first capacitor, a second capacitor, and a third capacitor, and the first capacitor, the second capacitor, and the third capacitor are reused in the three phases of the three-phase switched capacitor circuit; the three-phase switching conversion circuit includes a first inductor, a second inductor, and a third inductor; the three-phase switched capacitor circuit and the three-phase switching conversion circuit share a second switching component; the switching component includes the first switching component and the second switching component; The input terminal of the three-phase switched capacitor circuit serves as the input terminal of the three-phase interleaved hybrid switched capacitor circuit, used to connect the input voltage. The first switching assembly is electrically connected to the second switching assembly. The second switching assembly is electrically connected to the first terminal of the first inductor, the first terminal of the second inductor, and the first terminal of the third inductor, respectively. The output terminal of the three-phase switching conversion circuit is electrically connected to the second terminal of the first inductor, the second terminal of the second inductor, and the second terminal of the third inductor, respectively, and serves as the output terminal of the three-phase interleaved hybrid switched capacitor circuit, used to output the output voltage. The switching assembly is used to control the electrical connection relationship between the first capacitor, the second capacitor, the third capacitor, the first inductor, the second inductor, and the third inductor according to the received PWM control signal, so that the voltage conversion ratio of the three-phase switching capacitor circuit is 3:1, and the minimum voltage conversion ratio of the three-phase switching circuit is 3:

1. The three-phase interleaved hybrid switched capacitor circuit is used to convert the input voltage into the output voltage according to the duty cycle of the PWM control signal, and the voltage conversion ratio between the input voltage and the output voltage is at least 9:

1.

2. The three-phase interleaved hybrid switched capacitor circuit according to claim 1, characterized in that, The PWM control signals include: a first PWM control signal, a second PWM control signal, a third PWM control signal, a fourth PWM control signal, a fifth PWM control signal, a sixth PWM control signal, a seventh PWM control signal, an eighth PWM control signal, a ninth PWM control signal, a tenth PWM control signal, an eleventh PWM control signal, and a twelfth PWM control signal; the first switching assembly includes: a first switching transistor, a second switching transistor, a third switching transistor, a seventh switching transistor, an eighth switching transistor, and a ninth switching transistor; The second terminal of the first switching transistor is electrically connected to the second terminal of the second switching transistor and the second terminal of the third switching transistor, and serves as the input terminal of the three-phase switched capacitor circuit for receiving the input voltage; The first terminal of the first switching transistor is electrically connected to the second terminal of the seventh switching transistor and the first terminal of the first capacitor, respectively; the first terminal of the seventh switching transistor is electrically connected to the first terminal of the third capacitor. The first terminal of the second switch is electrically connected to the second terminal of the eighth switch and the first terminal of the second capacitor, respectively; the first terminal of the eighth switch is electrically connected to the second terminal of the first capacitor. The first terminal of the third switch is electrically connected to the second terminal of the third capacitor and the second terminal of the ninth switch, respectively; the first terminal of the ninth switch is electrically connected to the second terminal of the second capacitor. The control terminal of the first switch is used to receive the first PWM control signal, the control terminal of the second switch is used to receive the second PWM control signal, the control terminal of the third switch is used to receive the third PWM control signal, the control terminal of the seventh switch is used to receive the seventh PWM control signal, the control terminal of the eighth switch is used to receive the eighth PWM control signal, and the control terminal of the ninth switch is used to receive the ninth PWM control signal.

3. The three-phase interleaved hybrid switched capacitor circuit according to claim 2, characterized in that, The second switching assembly includes: a fourth switching transistor, a fifth switching transistor, a sixth switching transistor, a tenth switching transistor, an eleventh switching transistor, and a twelfth switching transistor; The second terminal of the tenth switch is electrically connected to the first terminal of the seventh switch, and the first terminal of the tenth switch is electrically connected to the second terminal of the fourth switch and the first terminal of the first inductor, respectively. The second terminal of the eleventh switch is electrically connected to the first terminal of the eighth switch, and the first terminal of the eleventh switch is electrically connected to the second terminal of the fifth switch and the first terminal of the second inductor, respectively. The second terminal of the twelfth switch is electrically connected to the first terminal of the ninth switch, and the first terminal of the twelfth switch is electrically connected to the second terminal of the sixth switch and the first terminal of the third inductor, respectively. The first terminal of the fourth switch, the first terminal of the fifth switch, and the first terminal of the sixth switch are all grounded; The control terminal of the fourth switch is used to receive the fourth PWM control signal, the control terminal of the fifth switch is used to receive the fifth PWM control signal, the control terminal of the sixth switch is used to receive the sixth PWM control signal, the control terminal of the tenth switch is used to receive the tenth PWM control signal, the control terminal of the eleventh switch is used to receive the eleventh PWM control signal, and the control terminal of the twelfth switch is used to receive the twelfth PWM control signal.

4. The three-phase interleaved hybrid switched capacitor circuit according to claim 1, characterized in that, The three-phase interleaved hybrid switched capacitor circuit also includes: a fourth capacitor; The first terminal of the fourth capacitor is electrically connected to the output terminal of the three-phase interleaved hybrid switched capacitor circuit, and the second terminal of the fourth capacitor is grounded.

5. The three-phase interleaved hybrid switched capacitor circuit according to claim 3, characterized in that, The switching assembly is used to control its own switching transistors to switch between the first mode, the second mode, the third mode, the fourth mode, the fifth mode, and the sixth mode in one cycle according to the received PWM control signal, so that the voltage conversion ratio of the three-phase switched capacitor circuit is 3:1 and the voltage conversion ratio of the three-phase switching conversion circuit is 3:

1. The three-phase interleaved hybrid switched capacitor circuit is used to convert the input voltage into the output voltage, and the voltage conversion ratio between the input voltage and the output voltage is 9:

1.

6. The three-phase interleaved hybrid switched capacitor circuit according to claim 5, characterized in that, In the first mode, the first switch, the fourth switch, the fifth switch, the eighth switch, the ninth switch, the tenth switch, and the twelfth switch are all controlled to be in the on state, while the second switch, the third switch, the sixth switch, the seventh switch, and the eleventh switch are all controlled to be in the off state. In the second mode, the fourth, fifth, sixth, ninth, and tenth switches are all controlled to be in the on state, while the first, second, third, seventh, eighth, eleventh, and twelfth switches are all controlled to be in the off state. In the third mode, the second, fifth, sixth, seventh, ninth, tenth, and eleventh switches are all controlled to be in the on state, while the first, third, fourth, eighth, and twelfth switches are all controlled to be in the off state. In the fourth mode, the fourth, fifth, sixth, seventh, and eleventh switches are all controlled to be in the on state, while the first, second, third, eighth, ninth, tenth, and twelfth switches are all controlled to be in the off state. In the fifth mode, the third, fourth, sixth, seventh, eighth, eleventh, and twelfth switches are all controlled to be in the on state, while the first, second, fifth, ninth, and tenth switches are all controlled to be in the off state. In the sixth mode, the fourth, fifth, sixth, eighth, and twelfth switches are all controlled to be in the on state, while the first, second, third, seventh, ninth, tenth, and eleventh switches are all controlled to be in the off state.

7. The three-phase interleaved hybrid switched capacitor circuit according to claim 3, characterized in that, When the control terminal of the first switch receives the first PWM control signal, the control terminal of the second switch receives the second PWM control signal and lags the phase of the first PWM control signal by 120°, and the control terminal of the third switch receives the third PWM control signal and lags the phase of the first PWM control signal by 240°. The switching state of the fourth switch is complementary to the switching state of the second switch, the switching state of the fifth switch is complementary to the switching state of the third switch, and the switching state of the sixth switch is complementary to the switching state of the first switch. The complementary state indicates that when one switch is in the on state, the other switch is in the off state. The switching state of the seventh switch is the same as that of the eleventh switch, and the duration of the conduction state is equal to the time from the start of the conduction state of the second switch to the start of the turn-off state of the third switch. The switching state of the ninth switch is the same as that of the tenth switch, and the duration of the conduction state is equal to the time from the start of the conduction state of the first switch to the start of the turn-off state of the second switch. The switching state of the eighth switch is the same as that of the twelfth switch, and the duration of the conduction state is equal to the time from the start of the conduction state of the third switch to the start of the turn-off state of the first switch.

8. The three-phase interleaved hybrid switched capacitor circuit according to claim 1, characterized in that, The inductor assembly includes: a first inductor, a second inductor, and a third inductor; the inductor assembly is a three-phase coupled inductor.

9. A voltage converter, characterized in that, include: The three-phase interleaved hybrid switched capacitor circuit as described in any one of claims 1-8.

10. An electronic device, characterized in that, include: The voltage converter as described in claim 9.

Images