WO2023272538A1

WO2023272538A1 - Control method for resonant power supply, and controller

Info

Publication number: WO2023272538A1
Application number: PCT/CN2021/103327
Authority: WO
Inventors: 代佳乐
Original assignee: 华为技术有限公司
Priority date: 2021-06-29
Filing date: 2021-06-29
Publication date: 2023-01-05
Also published as: CN115735324A

Abstract

The present application provides a control method for a resonant power supply, and a controller, which relate to the technical field of electronics, and are used to solve the problem that the dynamic response of a resonant power supply is limited. The control method for a resonant power supply provided in the present application comprises: controlling a resonant power supply to enter a first working mode, in the first working mode, the ratio of an input voltage to an output voltage of the resonant power supply being a first value, the resonant power supply comprising an inductor, a first capacitor and a second capacitor; and controlling the resonant power supply to enter a second working mode, in the second working mode, the ratio being a second value, and the first value being smaller than the second value.

Description

A control method and controller for a resonant power supply

technical field

The present application relates to the field of electronic technology, in particular to a control method and a controller of a resonant power supply.

Background technique

A switched capacitor circuit is a circuit that includes switches and capacitors controlled by a clock signal. Usually, a switched capacitor circuit can adjust and convert the input voltage from the power supply during operation, and give the adjusted output voltage to the load for the load. use. Among them, the switched capacitor circuit can achieve high conversion efficiency when the ratio of input and output voltages is a fixed ratio.

In some scenarios where the input voltage or output voltage changes, such as the battery powering the chip of a mobile phone, the input voltage changes with the discharge of the battery, and the ratio of the input voltage to the output voltage will change with the change of the input voltage , that is, when the ratio between the input voltage and the output voltage is not fixed, the conversion efficiency of the power supply will be reduced.

Contents of the invention

Embodiments of the present application provide a control method and a controller of a resonant power supply. The control method can improve the dynamic response capability of the resonant power supply, and is used to solve the problem of limited dynamic response of the resonant power supply. In order to achieve the above object, the embodiments of the present application adopt the following technical solutions:

In a first aspect, a method for controlling a resonant power supply is provided. The resonant power supply includes an inductor, a first capacitor, and a second capacitor. The control method includes: controlling the resonant power supply to enter a first working mode. In the first working mode, The ratio of the input voltage to the output voltage of the resonant power supply is a first value, wherein the ratio of the input voltage to the output voltage can also be called a gain; the resonant power supply also includes a transistor, and the resonant power supply is controlled at different In the working state, the resonant power supply is controlled to enter the second working mode. In the second working mode, the ratio is a second value, and the first value is smaller than the second value.

In the above technical solution, when the ratio of the input voltage to the output voltage of the resonant power supply is different in different working modes, the ratio of the input voltage to the output voltage of the resonant power supply in the first working mode is smaller than that in the second working mode When the ratio is lower, when the resonant power supply is switched from a low ratio to a high ratio, an additional voltage difference is added to the resonant power supply, which will cause the current in the resonant power supply to increase rapidly, so as to match the rapid increase of the output current as soon as possible, thereby improving The dynamic response capability of the resonant power supply.

In a possible implementation manner of the first aspect, the first value is 3:1, and the second value is 2:1. In the above possible implementation, when the ratio of the resonant power supply is switched from 3:1 to 2:1, when the switching action is just completed, an additional voltage difference is added to the resonant power supply, which will make the resonant power supply The current increases rapidly to match the rapid increase of the output current as soon as possible, thereby improving the dynamic response capability of the resonant power supply.

In a possible implementation manner of the first aspect, controlling the resonant power supply to enter the first working mode includes: controlling the resonant power supply to enter a first state, and in the first state, the inductor, the first capacitor and the The second capacitor is connected in series, the resonant power supply performs power conversion on the input voltage at the input terminal and provides the output voltage to the output terminal, and charges the inductor, the first capacitor and the second capacitor; the resonant power supply is controlled to enter the second State, in the second state, the resonant power supply provides the output voltage to the output terminal by releasing the electric energy stored in the inductance; control the resonant power supply to enter the third state, in the third state, the first capacitor connected in parallel with the second capacitor and in series with the inductance, the resonant power supply provides the output voltage to the output terminal by releasing the electric energy stored in the inductance, the first capacitor and the second capacitor; the resonant power supply is controlled to enter the first capacitor again Two states. In the above possible implementation manner, the resonant power supply is controlled to enter the first state, the second state, the third state and the second state in sequence, and through the first state, the inductance, the first The capacitor and the second capacitor are charged, and an output voltage is provided to the output terminal, and the electric energy stored in the inductor, the first capacitor, and the second capacitor is released through the second state and the third state to supply the output terminal The output voltage is provided, and the ratio of input voltage to output voltage of 3:1 is realized by switching between different states.

In a possible implementation manner of the first aspect, controlling the resonant power supply to enter the second working mode includes: controlling the resonant power supply to enter a first state, and in the first state, the inductor, the first capacitor and the The second capacitor is connected in series, the resonant power supply performs power conversion on the input voltage at the input terminal and provides the output voltage to the output terminal, and charges the inductor, the first capacitor and the second capacitor; the resonant power supply is controlled to enter the second state, in the second state, the resonant power supply provides the output voltage to the output terminal by releasing the electric energy stored in the inductance; the resonant power supply is controlled to enter the fourth state, in the fourth state, the inductance, the The first capacitor and the second capacitor are connected in series, and the resonant power supply provides the output voltage to the output terminal by releasing the electric energy stored in the inductance, the first capacitor and the second capacitor; the resonant power supply is controlled to enter the second capacitor again state. In the above possible implementation manner, the resonant power supply is controlled to enter the first state, the second state, the fourth state and the second state in sequence, and through the first state, the inductance in the resonant power supply, the first The capacitor and the second capacitor are charged, and an output voltage is provided to the output terminal, and the electric energy stored in the inductor, the first capacitor, and the second capacitor is released through the second state and the fourth state to supply the output terminal Provides an output voltage that achieves a 2:1 gain by switching between different states.

In a possible implementation manner of the first aspect, controlling the resonant power supply to enter the second state includes: controlling the resonant power supply to enter the second state when the resonant power supply enters the first state for a first preset time. In the above possible implementation manner, when the resonant power supply enters the first state for a first preset time, it is ensured that the electricity of the inductor, the first capacitor and the second capacitor in the resonant power supply reaches a saturated state, so that the The resonant power supply has sufficient power to discharge for subsequent states.

In a possible implementation manner of the first aspect, controlling the resonant power supply to enter the second state again includes: when the resonant power supply enters the third state for a second preset time, controlling the resonant power supply to enter the second state again Two states. In the above possible implementation manner, when the resonant power supply enters the third state for a second preset time, it is ensured that the electricity of the first capacitor and the second capacitor in the resonant power supply is completely discharged, so that the electricity stored in the first capacitor and the power in the second capacitor is fully used.

In a possible implementation manner of the first aspect, controlling the resonant power supply to enter the second state again includes: when the resonant power supply enters the fourth state for a third preset time, controlling the resonant power supply to enter the second state again Two states. In the above possible implementation manner, it is ensured that the electricity of the first capacitor and the second capacitor in the resonant power supply is completely discharged, so that the electricity stored in the first capacitor and the second capacitor is fully used.

In a possible implementation manner of the first aspect, before controlling the resonant power supply to enter the third state or controlling the resonant power supply to enter the fourth state, the method further includes: acquiring the current of the inductor; when the current reaches the zero-crossing threshold , exit the second state. In the above possible implementation manners, it can be ensured that the electric energy stored in the inductor is completely released, thereby improving the utilization rate of electric energy.

In a possible implementation manner of the first aspect, the zero-crossing threshold is 0. In the above possible implementation manner, when the zero-crossing threshold is 0, it can ensure that the electric energy stored in the inductor is completely released, thereby improving the utilization rate of electric energy.

In a possible implementation of the first aspect, after the resonant power supply is controlled to enter the second working mode, when the ratio of the input voltage to the output voltage of the resonant power supply is switched from a low ratio to a high ratio, that is, the first working mode switches When entering the second working mode, it may cause the current in the circuit to increase too fast, resulting in a large overshoot, so the method also includes: controlling the resonant power supply to enter the third working mode, in the third working mode, the resonance The current of the power supply is less than the preset current value. In the above possible implementation manner, by controlling the resonant power supply to enter the third working mode, the current of the resonant power supply is controlled, so that the current in the resonant power supply is in a controlled state.

In a possible implementation manner of the first aspect, controlling the resonant power supply to enter the third working mode includes: controlling the resonant power supply to enter a first state, and in the first state, the inductor, the first capacitor and the The second capacitor is connected in series, the resonant power supply performs power conversion on the input voltage at the input terminal and provides the output voltage to the output terminal, and charges the inductor, the first capacitor and the second capacitor; the resonant power supply is controlled to enter the second State, in the second state, the resonant power supply provides the output voltage to the output terminal through the inductor; control the resonant power supply to enter the first state again; control the resonant power supply to enter the fourth state, in the fourth state , the inductor, the first capacitor and the second capacitor are connected in series, and the resonant power supply supplies the output voltage to the output terminal through the inductor, the first capacitor and the second capacitor. In the above possible implementation manner, by controlling the resonant power supply to enter the third working mode, the current of the resonant power supply is controlled, so that the current in the resonant power supply is in a controlled state.

In a possible implementation of the first aspect, after the resonant power supply is controlled to enter the second working mode, when the ratio of the input voltage to the output voltage of the resonant power supply is switched from a low ratio to a high ratio, that is, the first working mode switches In the second working mode, the resonant circuit needs to go through multiple oscillations to reach a stable state. The method also includes: controlling the resonant power supply to enter a fourth working mode. In the fourth working mode, the current in the resonant power supply The fluctuation time is less than the preset time. In the above possible implementation manner, by controlling the resonant power supply to enter the fourth working mode, the fluctuation time of the current in the resonant power supply is shorter than a preset time, and then quickly reaches a stable state.

In a possible implementation manner of the first aspect, controlling the resonant power supply to enter the fourth working mode includes:

Controlling the resonant power supply to enter a third state, in the third state, the inductor, the first capacitor and the second capacitor are connected in series, and the resonant power supply supplies to the output terminal through the inductor, the first capacitor and the second capacitor providing the output voltage; controlling the resonant power supply to enter a second state, and in the second state, the resonant power supply provides the output voltage to the output terminal through the inductor. In the above possible implementation manner, by controlling the resonant power supply to enter the fourth working mode, the fluctuation time of the current in the resonant power supply is shorter than a preset time, and then quickly reaches a stable state.

In a second aspect, a controller is provided, and the controller includes: a first control module, configured to control the resonant power supply to enter a first working mode, and in the first working mode, the input voltage and the output voltage of the resonant power supply The ratio is a first value, and the resonant power supply includes an inductor, a first capacitor, and a second capacitor; a second control module is used to control the resonant power supply to enter a second working mode, and in the second working mode, the ratio is the second value, the first value is less than the second value.

In a possible implementation manner of the second aspect, the first value is 3:1, and the second value is 2:1.

In a possible implementation manner of the second aspect, the first control module is configured to: control the resonant power supply to enter a first state, and in the first state, the inductor, the first capacitor, and the second capacitor are connected in series , the resonant power supply performs power conversion on the input voltage at the input terminal and provides the output voltage to the output terminal, and charges the inductor, the first capacitor and the second capacitor; the resonant power supply is controlled to enter a second state, in the In the second state, the resonant power supply provides the output voltage to the output terminal through the inductance; the resonant power supply is controlled to enter the third state, and in the third state, the first capacitor and the second capacitor are connected in parallel with the inductance connected in series, the resonant power supply provides the output voltage to the output terminal through the inductor, the first capacitor and the second capacitor; the resonant power supply is controlled to enter the second state again.

In a possible implementation manner of the second aspect, the second control module is configured to: control the resonant power supply to enter a first state, and in the first state, the inductor, the first capacitor, and the second capacitor are connected in series , the resonant power supply performs power conversion on the input voltage at the input terminal and provides the output voltage to the output terminal, and charges the inductor, the first capacitor and the second capacitor; the resonant power supply is controlled to enter a second state, in the In the second state, the resonant power supply provides the output voltage to the output terminal through the inductor; the resonant power supply is controlled to enter a fourth state, and in the fourth state, the inductor, the first capacitor and the second capacitor are connected in series, The resonant power supply provides the output voltage to the output terminal through the inductor, the first capacitor and the second capacitor; the resonant power supply is controlled to enter the second state again.

In a possible implementation manner of the second aspect, the first control module or the second control module is further configured to: when the resonant power supply enters the first state for a first preset time, control the resonant power supply to enter the second state.

In a possible implementation manner of the second aspect, the first control module is further configured to: control the resonant power supply to enter the second state again when the resonant power supply enters the third state for a second preset time .

In a possible implementation manner of the second aspect, the second control module is further configured to: control the resonant power supply to enter the second state again when the resonant power supply enters the fourth state for a third preset time.

In a possible implementation manner of the second aspect, the controller further includes an acquisition module; the acquisition module is configured to acquire The current of the inductor; the first control module or the second control module is also used to control the resonant power supply to exit the second state when the current reaches a zero-crossing threshold.

In a possible implementation manner of the second aspect, the zero-crossing threshold is 0.

In a possible implementation manner of the second aspect, the controller further includes a third control module; the third control module is configured to control the resonant power supply to enter a third working mode, and in the third working mode, the The current of the resonant power supply is less than the preset current value.

In a possible implementation manner of the second aspect, the third control module is configured to: control the resonant power supply to enter a first state, and in the first state, the inductor, the first capacitor, and the second capacitor are connected in series , the resonant power supply performs power conversion on the input voltage at the input terminal and provides the output voltage to the output terminal, and charges the inductor, the first capacitor and the second capacitor; the resonant power supply is controlled to enter a second state, in the In the second state, the resonant power supply provides the output voltage to the output terminal through the inductor; the resonant power supply is controlled to enter the first state again; the resonant power supply is controlled to enter the fourth state, and in the fourth state, the inductor, The first capacitor and the second capacitor are connected in series, and the resonant power supply provides the output voltage to the output terminal through the inductor, the first capacitor and the second capacitor.

In a possible implementation manner of the second aspect, the controller further includes a fourth control module; the fourth control module is configured to control the resonant power supply to enter a fourth working mode, and in the fourth working mode, the The fluctuation time of the current in the resonant power supply is less than a preset time.

In a possible implementation manner of the second aspect, the fourth control module is configured to: control the resonant power supply to enter a third state, and in the third state, the inductor, the first capacitor, and the second capacitor are connected in series , the resonant power supply provides the output voltage to the output terminal through the inductance, the first capacitor and the second capacitor; the resonant power supply is controlled to enter a second state, and in the second state, the resonant power supply supplies the output voltage to the output terminal through the inductance The output provides this output voltage.

In a third aspect, a controller is provided, the controller includes a memory and a processor, and instructions are stored in the memory, and when the processor executes the instructions in the memory, the controller executes the above-mentioned first aspect or the first aspect. A method for controlling a resonant power supply provided in any possible implementation manner of one aspect.

In a fourth aspect, a terminal device is provided, the terminal device includes a resonant power supply, the resonant power supply includes a controller, and the controller implements the resonant power supply provided in the first aspect or any possible implementation manner of the first aspect. control method.

In a fifth aspect, there is provided a computer-readable storage medium, the computer-readable storage medium includes computer instructions, and when the computer instructions are run on a controller, the controller executes the above-mentioned first aspect or the first aspect In the method for controlling a resonant power supply provided in any possible implementation manner of , the controller is the same as the controller provided in the second aspect above or any possible implementation manner of the second aspect.

It can be understood that any of the devices provided above can be used to implement the corresponding method provided above, therefore, the beneficial effects it can achieve can refer to the beneficial effects in the corresponding method provided above, here No longer.

Description of drawings

FIG. 1 is a schematic structural diagram of a resonant circuit provided in an embodiment of the present application;

FIG. 2 is a schematic structural diagram of another resonant circuit provided in an embodiment of the present application;

FIG. 3 is a schematic structural diagram of a switched capacitor circuit provided in an embodiment of the present application;

FIG. 4 is a schematic structural diagram of a terminal device provided in an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a resonant power supply provided by an embodiment of the present application;

FIG. 6 is a schematic structural diagram of another resonant power supply provided by the embodiment of the present application;

FIG. 7 is a flow chart of a method for controlling a resonant power supply provided in an embodiment of the present application;

FIG. 8 is a schematic diagram of an operating mode of a resonant power supply provided by an embodiment of the present application;

FIG. 9 is a schematic diagram of another working mode of a resonant power supply provided by the embodiment of the present application;

FIG. 10 is a schematic diagram of a change trend of a resonant power supply current provided by an embodiment of the present application;

FIG. 11 is a schematic diagram of a transient process of a resonant power supply provided by an embodiment of the present application;

FIG. 12 is a schematic structural diagram of a controller provided in an embodiment of the present application;

FIG. 13 is a schematic structural diagram of another controller provided by the embodiment of the present application.

detailed description

In this application, "at least one" means one or more, and "multiple" means two or more. "And/or" describes the association relationship of associated objects, indicating that there may be three types of relationships, for example, A and/or B, which can mean: A exists alone, A and B exist simultaneously, and B exists alone, where A, B can be singular or plural. "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 item (piece) of a, b, or c can represent: a, b, c, a and b, a and c, b and c, or a, b and c, wherein a, b, c can be single or multiple.

The embodiment of the present application uses words such as "first" and "second" to distinguish objects with similar names or functions or effects. and order of execution. The term "coupled" is used to indicate an electrical connection, including direct connection through wires or terminals or indirect connection through other devices. "Coupling" should therefore be viewed as an electronic communication connection in a broad sense.

It should be noted that the transistor in the embodiment of the present application may be any suitable solid-state semiconductor switching device, for example, an insulated gate bipolar transistor (insulate-gate bipolar transistor, IGBT) and a metal-oxide-semiconductor field-effect transistor (metal- oxide-semiconductor field-effect transistor, MOSFET), the type of MOSFET can include N-type metal oxide semiconductor (N-type metal oxide semiconductor, NMOS) tube and P-type metal oxide semiconductor (P-type metal oxide semiconductor, PMOS ) tube, the transistor may also be other types of transistors, such as gallium nitride transistors, and the transistors in the embodiments of the present application are described by taking NMOS as an example. The transistor can be a switching tube or a power tube. The difference between the two is that the power tube is a MOS tube with a small on-resistance. MOS tube. In addition, the two transistors coupled in series herein may mean that the source of the first transistor is connected to the drain of the second transistor among the two transistors, and the drain of the first transistor is connected to the source of the second transistor. Both are connected to the meaning of the external circuit.

At present, mobile terminal devices such as laptops, tablets, mobile phones, vehicle-mounted devices, and wearable devices need to use resonant power supplies for charging and discharging. Resonant power supplies based on resonant circuits have higher conversion efficiency than traditional step-down conversion circuits. Therefore it is widely used. Commonly used resonant power supplies can include two types: a resonant circuit and a switched capacitor circuit, and examples of the resonant circuit and switched capacitor circuit will be described below.

FIG. 1 is a schematic structural diagram of a resonant circuit, the input voltage of the resonant circuit is in a fixed ratio to the output voltage (the ratio of the input voltage to the output voltage may also be referred to as gain). As shown in Figure 1, the resonant circuit includes 4 transistors (and can be denoted as M ₁₁ to M ₁₄ ), inductor L ₁ , capacitor C ₁₁ and resistor R ₁ , M ₁₁ to M ₁₄ are coupled in series at the input of the resonant circuit Between the terminal and the first terminal, the coupling point of M ₁₁ and M ₁₂ is the first node P ₁ , the coupling point of M ₁₂ and M ₁₃ is the second node P ₂ , and the coupling point of M ₁₃ and M ₁₄ is the third node P ₃ , inductor L ₁ , capacitor C ₁₁ and resistor R ₁ are coupled in series between the first node P ₁ and the third node P ₃ , the first terminal is coupled to the ground terminal (GND), and the output of the resonant circuit terminal is coupled to the _second node P2. Specifically, _M11 and _M13 are turned _on at T1 time to store the input voltage VI in the inductor L1 and capacitor _C11 , and _at T2 time _M12 and _M14 are turned _on to convert the stored energy into The output voltage VO, VO is used to charge and discharge the terminal equipment. However, since the switching frequency of the transistor in this scheme is equal to the resonant frequency of the circuit, the gain of the resonant circuit is constant at 1/2, resulting in the resonant circuit being a fixed-gain resonant circuit, which limits the resonant circuit. scope of use.

Fig. 2 is a schematic structural diagram of another resonant circuit, the ratio of input voltage and output voltage of the resonant circuit is adjustable. As shown in FIG. 2, the resonant circuit includes 6 transistors (and may be denoted as M ₂₁ to M ₂₆ ), an inductor L ₂ , a first capacitor C ₂₁ and a second capacitor C ₂₂ , and M ₂₁ to M ₂₆ are coupled in series to the Between the input terminal and the first terminal of the resonant circuit, the coupling point of M ₂₁ and M ₂₂ is the first node P ₁ , the coupling point of M ₂₂ and M ₂₃ is the second node P ₂ , and the coupling point of M ₂₃ and M ₂₄ is the third node P ₃ , the coupling point of M ₂₄ and M ₂₅ is the fourth node P ₄ , the coupling point of M ₂₅ and M ₂₆ is the fifth node P ₅ , and the first capacitor C ₂₁ is coupled between the first node P ₁ and Between the fifth node _P5 , the _second capacitor _C22 is coupled between the _second node P2 and the _fourth node P4, one end of the inductor L2 is coupled to the third node _P3 , and the other end of the inductor _L2 is coupled to the The output terminal of the resonant circuit is coupled, and the first terminal is coupled with the ground terminal (GND). Specifically, M ₂₁ , M ₂₃ and M ₂₅ are turned on at time T ₁ to store the input voltage VI in the first capacitor C ₂₁ , second capacitor C ₂₂ and inductor L ₂ , and at time T ₂ M ₂₂ , M ₂₄ and M ₂₆ are turned on to convert the stored energy into an output voltage VO, which is used to charge and discharge the terminal equipment. The resonant circuit adjusts the gain by controlling the ratio of time the transistor is on and off (duty cycle). However, the input voltage can only be applied to the inductor L ₂ through the first capacitor C ₂₁ and the second capacitor C _22. Since the capacitor and the inductor will resonate, the capacitor voltage is not a constant value, which causes the gain and duty cycle to be not fixed. Proportional relationship, in order to reduce the impact of resonance, it is necessary to use larger capacitors and larger inductance, so that the resonance frequency is far away from the switching frequency, resulting in an increase in the area of the resonance circuit.

Fig. 3 is a schematic structural diagram of a switched capacitor circuit, the ratio of the input voltage to the output voltage of the switched capacitor circuit is adjustable. As shown in FIG. 3 , the switched capacitor circuit includes: 4 transistors (and can be denoted as M ₃₁ to M ₃₄ ) and a capacitor C ₃₁ , and M ₃₁ and M ₃₂ are coupled in series between the input terminal and the output terminal of the resonant circuit , the coupling point of M ₃₁ and M ₃₂ is the first node P ₁ , M ₃₃ and M ₃₄ are coupled in series between the input end and the output end of the resonant circuit, and the coupling point of M ₃₃ and M ₃₄ is the second node P ₂ , M ₃₁ , M ₃₂ and M ₃₃ , M ₃₄ are connected in parallel, and the capacitor C ₃₁ is coupled between the first node P ₁ and the second node P ₂ . Specifically, _M31 and _M34 are turned _on at time T1 to store the input voltage VI in capacitor _C31 , and _M32 and _M33 are turned _on at time T2 to convert the stored energy into output voltage VO, VO is used to charge and discharge terminal equipment. The switched capacitor circuit adjusts the gain by controlling the ratio of time the transistor is on and off (duty cycle). By superimposing multiple basic switched capacitor circuits shown in Figure 3, a new switched capacitor circuit is formed, and the combination or switching of multiple basic switched capacitor circuit modules is realized by controlling the on or off of the transistor, thereby realizing a wide range of input voltage and output voltage ratio adjustment. However, the switched capacitor circuit has high conversion efficiency only when the input voltage and the output voltage are in an integer ratio, and the conversion efficiency is low when the ratio is not an integer.

Based on this, in order to solve the aforementioned technical problems, embodiments of the present application provide a resonant power supply and a control method for the resonant power supply, which can be used to improve the dynamic response capability of the resonant power supply. The method for controlling the resonant power supply can be applied to various terminal devices including the resonant power supply, and the resonant power supply can be a high-frequency resonant power supply. The terminal devices may include but are not limited to personal computers, server computers, handheld or laptop devices, mobile devices (such as mobile phones, tablet computers, personal digital assistants, media players, etc.), wearable devices, automotive devices, consumer Terminal equipment, minicomputers, mainframe computers, mobile robots and drones, etc. The specific structure of the terminal device will be described below.

FIG. 4 is a schematic structural diagram of a terminal device provided in an embodiment of the present application, and the terminal device is described by taking a mobile phone as an example. As shown in FIG. 4 , the terminal device may include: a memory 101 , a processor 102 , a sensor component 103 , a multimedia component 104 , a power supply 105 and an input/output interface 106 .

Wherein, memory 101 can be used for storing data, software program and software module; It mainly includes storage program area and storage data area, wherein, storage program area can store operating system and at least one function required application program, such as sound playing function or image Play function, etc.; the storage data area can store data created according to the use of the terminal equipment, such as audio data, image data, etc. In addition, the terminal device may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage devices.

The processor 102 is the control center of the terminal equipment, which uses various interfaces and lines to connect various parts of the entire equipment, runs or executes the software programs and/or software modules stored in the memory 101, and calls the data stored in the memory 101 , execute various functions of the terminal equipment and process data, so as to monitor the terminal equipment as a whole. Optionally, the processor 102 may include one or more processing units, for example, the processor 102 may include a central processing unit (central processing unit, CPU), an application processor (application processor, AP), a modem processor , graphics processing unit (graphics processing unit, GPU), image signal processor (image signal processor, ISP), controller, video codec, digital signal processor (digital signal processor, DSP), baseband processor and/or Neural-network processing unit (NPU), etc. Wherein, different processing units may be independent devices, or may be integrated in one or more processors.

The sensor component 103 includes one or more sensors, which are used to provide status assessments of various aspects for the terminal device. Among them, the sensor component 103 may include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor or a temperature sensor, and the sensor component 103 can detect the acceleration/deceleration, orientation, opening/closing status, relative positioning of components or terminal Equipment temperature changes, etc. In addition, the sensor assembly 103 may also include a light sensor, such as a complementary metal oxide semiconductor (CMOS) or a charge coupled device (CCD) image sensor, for use in imaging applications, that is, a camera Part.

The multimedia component 104 provides an output interface screen between the terminal device and the user. The screen may be a touch panel, and when the screen is a touch panel, the screen may be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensor may not only sense a boundary of a touch or swipe action, but also detect duration and pressure associated with the touch or swipe action. In addition, the multimedia component 104 also includes at least one camera, for example, the multimedia component 104 includes a front camera and/or a rear camera. When the terminal device is in an operation mode, such as a shooting mode or a video mode, the front camera and/or the rear camera can receive external multimedia data. Each front camera and rear camera can be a fixed optical lens system or have focal length and optical zoom capability.

The power supply 105 is used to provide charging and discharging power for each component of the terminal device. The power supply 105 may include a power management system, one or more power supplies, or other components associated with the terminal device to generate, manage and distribute power. In the embodiment of the present application, the power supply 105 may include a power chip, and the power chip may include the resonant power supply provided herein and a battery pack, the resonant power supply can be used to supply power to the above components, and the battery pack can be used to provide The above components are powered.

The input/output interface 106 provides an interface between the processor 102 and the peripheral interface module. For example, the peripheral interface module can be a keyboard, a mouse, or a universal serial bus (universal serial bus, USB) device, etc.

Although not shown, the terminal device may also include an audio component and a communication component. For example, the audio component includes a microphone, and the communication component includes a wireless fidelity (wireless fidelity, WiFi) module or a Bluetooth module. repeat. Those skilled in the art can understand that the structure of the terminal device shown in FIG. 4 does not constitute a limitation on the terminal device, and may include more or less components than those shown in the figure, or combine some components, or arrange different components.

FIG. 5 is a schematic structural diagram of a resonant power supply provided in an embodiment of the present application, and the resonant power supply can be applied to the terminal device provided above. As shown in FIG. 5 , the resonant power supply includes: a switch circuit 201 and a resonant circuit 202 . The switch circuit 201 and the resonant circuit 202 are coupled in series between the input terminal and the output terminal of the resonant power supply. Wherein, the input end can be used to receive an input voltage, and the input voltage can be provided by a DC power supply 203, for example, the DC power supply 203 can be a battery pack in the above-mentioned terminal equipment, and the resonant power supply can be used to convert the input voltage into an output voltage , the output terminal can be used to output the output voltage, and the output voltage can be used to supply power to the load 204 .

Further, the switch circuit 201 provided above can be controlled by the controller 205 . The controller 205 may include a detection circuit including a plurality of signal detectors or sensors, which can be used to detect and monitor a plurality of state variables of the resonant circuit 202 in the resonant power supply. It should be noted that the controller 205 may or may not be integrated with the resonant power supply, which is not specifically limited in this embodiment of the present application. FIG. 5 takes the resonant power supply including the controller 205 as an example for illustration.

Taking the resonant power supply shown in FIG. 6 as an example, the specific structures of the different circuit modules in the resonant power supply provided above will be described below. FIG. 6 takes the resonant power supply including the controller 205 as an example for illustration.

In a possible embodiment, the switch circuit 201 may include 7 transistors and may be denoted as M1 to M7, and the resonant circuit 202 may include 3 capacitors and may represent the first capacitor C1, the second capacitor C2 and the third Capacitor C3, the resonant circuit 202 may also include an inductor L. Wherein, the transistor M1, the first capacitor C1, the transistor M3, the second capacitor C2, the transistor M5 and the inductor L are coupled in series between the input terminal and the output terminal of the resonant power supply, the transistor M1 and the first capacitor C1 The coupling point is the first node P1, the coupling point between the first capacitor C1 and the transistor M3 is the second node P2, the coupling point between the transistor M3 and the second capacitor C2 is the third node P3, and the second capacitor C2 and the The coupling point of the transistor M5 is the fourth node P4, the coupling point of the transistor M5 and the inductor L is the fifth node P5, the transistor M2 is coupled between the ground terminal (GND) and the second node P2, and the transistor M7 is coupled to the Between the ground terminal (GND) and the fourth node P4, the transistor M4 is coupled between the first node P1 and the fifth node P5, and the transistor M6 is coupled between the third node P3 and the fifth node P5, The third capacitor C3 is coupled between the fifth node P5 and the ground terminal (GND). Wherein, the gates of the transistors M1 to M7 can be respectively used to receive the first control signal S1 to the seventh control signal S7 output by the controller 205 .

Further, the controller 205 provided above may include a detection circuit, and the detection circuit may include a plurality of signal detectors or sensors, which may be used to detect and monitor a plurality of state variables of the resonant circuit 202 in the resonant power supply. For example, the aforementioned state variables may include the current flowing through the inductor L, the voltage drop across the capacitor C1 , the voltage drop across the capacitor C2 or the voltage drop across the capacitor C3 . The controller 205 can control the transistors M1 to M7 to be turned on or off through the plurality of state variables.

FIG. 7 shows a method for controlling a resonant power supply provided by an embodiment of the present application. The control method can be applied to the above-mentioned resonant power supply, and specifically can be executed by the controller 205 in the above-mentioned resonant power supply. The controller 205 can be used to control the above-mentioned transistors M1 to M7 to be turned on or off. As shown in Fig. 7, the control method includes the following steps.

S701: Control the resonant power supply to enter a first working mode. In the first working mode, the ratio of the input voltage to the output voltage of the resonant power supply is a first value. Wherein, the controller 205 can adjust the ratio of the input voltage to the output voltage (also called the gain) by controlling the on/off time ratio of the transistors M1 to M7 (also called the duty ratio). When the resonant power supply works in the first working mode, the ratio of the input voltage to the output voltage of the resonant power supply is a first value, and the first value may be 3:1.

In a possible embodiment, as shown in FIG. 8 , controlling the resonant power supply to enter the first working mode may include controlling the resonant power supply to enter a first state, a second state, a third state and a second state in sequence. The working process of the first state, the second state and the third state will be described in detail below.

The resonant power supply is controlled to enter the first state. Specifically, the controller 205 can control the transistor M1, the transistor M3 and the transistor M5 to be turned on through the first control signal S1, the third control signal S3 and the fifth control signal S5 respectively, and the second control signal S2 and the fourth control signal respectively S4, the sixth control signal S6 and the seventh control signal S7 control the transistor M2, the transistor M4, the transistor M6 and the transistor M7 to turn off, so that the inductor L, the first capacitor C1 and the second capacitor C2 are coupled in series at the input terminal Between the input terminal and the output terminal, the input terminal can be used to receive the input voltage VI provided by the DC power supply 203 to form a working state as shown in (a) in FIG. 8 . At this time, the input voltage VI received by the input terminal of the resonant power supply charges the inductor L, the first capacitor C1 and the second capacitor C2 through the transistor M1, the transistor M3 and the transistor M5, and charges the The input voltage VI undergoes voltage conversion to obtain an output voltage, and the output terminal can be used to output the output voltage VO.

controlling the resonant power supply to enter the second state. Specifically, the controller 205 can control the conduction of the transistor M5 and the transistor M7 through the fifth control signal S5 and the seventh control signal S7 respectively, and respectively through the first control signal S1, the second control signal S2, the third control signal S3, the The four control signal S4 and the sixth control signal S6 control the transistor M1, the transistor M2, the transistor M3, the transistor M4 and the transistor M6 to be disconnected, so that the inductance L is coupled between the ground terminal (GND) and the output terminal, as shown in FIG. 8 The working state shown in (b) in. At this time, the resonant power supply provides the output voltage VO to the output terminal by releasing the electric energy stored in the inductor L, and the output terminal can be used to output the output voltage VO.

controlling the resonant power supply to enter the third state. Specifically, the controller 205 can control the controller 205 to control the transistor M1, the transistor M3 and the transistor M5 to turn off through the first control signal S1, the third control signal S3 and the fifth control signal S5 respectively, and respectively through the second control signal S2, The fourth control signal S4, the sixth control signal S6 and the seventh control signal S7 control the conduction of the transistor M2, the transistor M4, the transistor M6 and the transistor M7, so that the first capacitor C1 and the second capacitor C2 are connected in parallel with the inductor L connected in series, one end of the first capacitor C1 is coupled to the ground terminal (GND), and the second end of the inductor L is coupled to the output end, forming a working state as shown in (c) of FIG. 8 . At this time, the resonant power supply provides the output voltage VO to the output terminal by releasing the electric energy stored in the inductor L, the first capacitor C1 and the second capacitor C2, and the output terminal can be used to output the output voltage VO.

The resonant power supply is controlled to enter the second state again. This second state is consistent with the second state described in (b) in the above-mentioned FIG. ).

Further, when controlling the resonant power supply to enter the above different states, the resonant power supply may be controlled to enter a corresponding state when a certain condition is met, which will be described respectively below.

Wherein, controlling the resonant power supply to enter the second state may include: controlling the resonant power supply to enter the second state when the resonant power supply enters the first state for a first preset time. The specific value of the first preset time can be determined according to one or more state variables in the resonant power supply, for example, the specific value of the first preset time can be determined according to the magnitude of the current flowing through the inductor L For example, the first preset time may be a 1/4 cycle. In this working mode, the sum of the time the resonant power supply works in the first state and the time it works in the second state is equal to half of the entire working period of the resonant power supply.

Controlling the resonant power supply to enter the third state may include: the detection circuit in the controller 205 may be used to detect the current flowing through the inductor L, and when the current reaches a zero-crossing threshold (the zero-crossing threshold may be 0), control the The resonant power supply exits the second state and enters the third state.

Controlling the resonant power supply to enter the second state again may include: controlling the resonant power supply to enter the second state again when the resonant power supply enters the third state for a second preset time. The specific value of the second preset time can be determined according to one or more state variables in the resonant power supply, for example, the specific value of the second preset time can be determined according to the magnitude of the current flowing through the inductor L . In this working mode, the sum of the time the resonant power supply works in the third state and the time it works in the second state is equal to half of the entire period of the resonant power supply.

S702: Control the resonant power supply to enter a second working mode, in the second working mode, the ratio is a second value, and the first value is smaller than the second value. Wherein, the controller 205 can adjust the ratio of the input voltage to the output voltage (also called the gain) by controlling the on/off time ratio of the transistors M1 to M7 (also called the duty cycle). When the resonant power supply works in the second working mode, the ratio of the input voltage to the output voltage of the resonant power supply is a second value, and the second value may be 2:1.

In a possible embodiment, as shown in FIG. 9 , controlling the resonant power supply to enter the second working mode may include controlling the resonant power supply to enter the first state, the second state, the fourth state and the second state in sequence. The working process of the first state, the second state and the fourth state will be described in detail below.

The resonant power supply is controlled to enter the first state. Specifically, the first state is shown in (a) in FIG. 9 , and the first state is the same as the first state in S701 above, and details are not repeated here. controlling the resonant power supply to enter the second state. Specifically, the second state is shown in (b) in FIG. 9 , and the second state is the same as the second state in S701 above, and details are not repeated here.

controlling the resonant power supply to enter the fourth state. Specifically, the controller 205 can respectively control the conduction of the transistor M2, the transistor M4, the transistor M5 and the transistor M6 through the second control signal S2, the fourth control signal S4, the fifth control signal S5 and the sixth control signal S6, respectively through the second A control signal S1, a third control signal S3, and a seventh control signal S7 control the transistor M1, the transistor M3, and the transistor M7 to be turned off, so that the inductor L, the first capacitor C1, and the second capacitor C2 are coupled in series to the ground terminal Between (GND) and the output terminal, the working state shown in (c) in Fig. 9 is formed. At this time, the resonant power supply provides the output voltage VO to the output terminal by releasing the electric energy stored in the inductor L, the first capacitor C1 and the second capacitor C2, and the output terminal can be used to output the output voltage VO.

The resonant power supply is controlled to enter the second state again. Specifically, the second state is as shown in (d) in FIG. 9 , and the second state is the same as the second state in S701 above, which will not be repeated here.

Wherein, controlling the resonant power supply to enter the second state may include: controlling the resonant power supply to enter the second state when the resonant power supply enters the first state for a first preset time. In the first working mode and the second working mode, when the resonant power supply is triggered to enter the second state from the first state, the first preset time for the first state to reach can be different, and the specific value can be determined according to one of the resonant power supplies. Alternatively, it may be determined by a plurality of state variables, for example, the specific value of the first preset time may be determined according to the magnitude of the resonant inductor current flowing through the inductor L. In the second working mode, the sum of the time the resonant power supply works in the first state and the time it works in the second state is equal to 1/3 of the entire period of the resonant power supply.

Controlling the resonant power supply to enter the second state again may include: controlling the resonant power supply to enter the second state again when the resonant power supply enters the fourth state for a third preset time. The specific value of the third preset time can be determined according to one or more state variables in the resonant power supply, for example, the specific value of the third preset time can be determined according to the magnitude of the inductor current flowing through the inductor L value. Wherein, in the working mode, the sum of the time that the resonant power supply works in the fourth state and the time that works in the second state is equal to 2/3 of the entire cycle of the resonant power supply.

Controlling the resonant power supply to enter the fourth state may include: the detection circuit in the controller 205 detects the current flowing through the inductor L, and exits the second state when the current reaches a zero-crossing threshold (the zero-crossing threshold may be 0). , and enter the fourth state.

In the method provided in the embodiment of this application, since the controller 205 can control the resonant power supply to be in different working modes, the ratio of the input voltage to the output voltage of the resonant power supply in the first working mode is smaller than that in the second working mode Ratio, when the ratio is switched from a low ratio to a high ratio, an additional voltage difference is added to the resonant power supply, so that the current in the resonant power supply increases rapidly, thereby improving the dynamic response capability of the resonant power supply. Exemplarily, when the resonant power supply works in the first working mode, the ratio of the input voltage to the output voltage is 3:1, if the input voltage is 3V, the output voltage is 1V; when the resonant power supply works in the second working mode In mode, the ratio of the input voltage to the output voltage is 2:1, if the input voltage is 3V, the output voltage is 1.5V. When the working mode of the resonant power supply is switched from 3:1 to 2:1, when the switching action is just completed, a voltage difference of 0.5V is added to the resonant power supply, which will cause the current in the resonant power supply to increase rapidly, so that The rapid increase of the output current is matched as soon as possible, thereby improving the dynamic response capability of the resonant power supply.

In a possible embodiment, when the ratio of the input voltage to the output voltage of the resonant power supply is switched from a low ratio to a high ratio, that is, when the first working mode is switched to the second working mode, the current in the circuit may increase too much. Fast, resulting in a large overshoot. At this time, the resonant power supply can be controlled to enter the third working mode, and in the third working mode, the current of the resonant power supply is less than a preset current value.

Specifically, controlling the resonant power supply to enter the third working mode includes: controlling the resonant power supply to enter the first state, the third state, the first state and the fourth state in sequence. Through the switching of different states, the current in the resonant power supply is in a controlled state in the process of increasing, that is, the current of the resonant power supply is less than the preset current value, and the preset current value can include a value greater than that required by the resonant power supply The critical value of the current value, for example, the preset current value may be 6A. The specific value of the preset current value can be set according to actual needs or experience of relevant technical personnel, and the embodiment of the present application does not specifically limit the current value. Wherein, the first state, the third state and the fourth state are the same as the first state, the third state and the fourth state provided above, and will not be repeated here.

Exemplarily, FIG. 10 is a schematic diagram of the changing trend of the current in the resonant power supply under different operating modes, and (a) in FIG. 10 represents a schematic diagram of the changing trend of the current in the resonant power supply in the second operating mode, the curve S10 represents the change trend of the current when the resonant power supply is in the first state, the curve S11 represents the change trend of the current when the resonant power supply is in the second state, and the curve S12 represents the current change trend when the resonant power supply is in the fourth state, Curve S13 represents the variation trend of the current when the resonant power supply is in the second state. (b) in Fig. 10 shows the schematic diagram of the changing trend of the current in the resonant power supply in the third working mode of the resonant power supply, S14 shows the changing trend of the current when the resonant power supply is in the first state, curve S15 shows the resonant power supply When the current is in the third state, the curve S16 represents the current change trend when the resonant power supply is in the first state, and the curve S17 represents the current change trend when the resonant power supply is in the fourth state. It can be seen from FIG. 10 that the current in the resonant power supply will continue to increase after the resonant power supply enters the second working mode, and the current in the resonant power supply is in a controlled state after the resonant power supply enters the third working mode.

In another possible embodiment, when the ratio of the input voltage to the output voltage of the resonant power supply is switched from a low ratio to a high ratio, that is, when the first working mode is switched to the second working mode, the resonant circuit needs to go through multiple Oscillation is required to reach a steady state, which may cause a longer fluctuation time in the current in the resonant power supply. At this time, the resonant power supply can be controlled to enter a fourth working mode, and in the fourth working mode, the fluctuation time of the current of the resonant power supply is less than a preset time.

Specifically, when the target gain of the resonant power supply is 2:1, that is, the ratio of the input voltage to the output voltage of the resonant power supply is 2:1, controlling the resonant power supply to enter the fourth working mode includes: controlling the resonant power supply to enter The first state and the second state, or control the resonant power supply to enter the fourth state and the second state in sequence. Through the switching of different states, the fluctuation time of the current in the resonant power supply is less than the preset time. Wherein, the preset time may be the time required for the current fluctuation in the resonant power supply under different ratios. The specific value of the preset time can be set according to actual needs or the experience of relevant technical personnel, and the embodiment of the present application does not specifically limit the current value. It should be noted that the first state, the second state, and the fourth state are the same as the first state, the third state, and the fourth state provided above, and will not be repeated here.

Exemplarily, FIG. 11 is a schematic diagram of the transient process of the current in the resonant power supply under different conditions. The curve S0 in FIG. 11 represents the current transient process of the resonant power supply operating in the first working mode, and the curve S1 represents the The transient process of the current after the resonant power supply switches from the first working mode to the second working mode, and the curve S2 represents the transient process of the current after the resonant power supply enters the fourth working mode. It can be seen from FIG. 11 that after the resonant power supply enters the fourth working mode, the current quickly reaches the steady state of the current at the target gain.

It can be understood that, in order to realize the above-mentioned functions, the controller includes corresponding hardware structures and/or software modules for performing various functions. Those skilled in the art should easily realize that, in combination with the controllers and related steps described in the embodiments herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software drives hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.

In the embodiment of the present application, the controller may be divided into functional modules according to the above method examples. For example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The above-mentioned integrated modules can be implemented in the form of hardware or in the form of software function modules. It should be noted that the division of modules in the embodiment of the present application is schematic, and is only a logical function division, and there may be other division methods in actual implementation.

In the case of dividing each functional module corresponding to each function, Fig. 12 shows a possible structural diagram of the controller involved in the above embodiment, the controller includes: a first control module 401, a second control module 402. Wherein, the first control module 401 is used to support the controller to perform one or more steps in S701 in the above method embodiment; the second control module 402 is used to support the controller to perform S702 in the above method embodiment One or more steps in; and/or other technical processes described herein.

Optionally, the controller also includes an acquisition module 403, which is used to acquire a plurality of state variables in the resonant power supply, for example, the acquisition module can be used to acquire the current of the inductor L in the resonant power supply; the acquisition Module 403 is also used to obtain a zero-crossing detection signal based on whether the current of the inductor L reaches the zero-crossing threshold, wherein the zero-crossing threshold can also be 0.

Further, the controller also includes a third control module 404, configured to control the resonant power supply to enter a third working mode, including: controlling the resonant power supply to enter a first state, and in the first state, the inductor, The first capacitor and the second capacitor are connected in series, the resonant power supply performs power conversion on the input voltage at the input terminal and provides the output voltage to the output terminal, and provides the inductor, the first capacitor and the The second capacitor is charged; the resonant power supply is controlled to enter the second state, and in the second state, the resonant power supply provides the output voltage to the output terminal through the inductance; the resonant power supply is controlled again Enter the first state; control the resonant power supply to enter a fourth state, in the fourth state, the inductor, the first capacitor and the second capacitor are connected in series, and the resonant power supply passes through the inductor , the first capacitor and the second capacitor provide the output voltage to the output terminal.

The controller also includes a fourth control module 405, configured to control the resonant power supply to enter a fourth working mode, including: controlling the resonant power supply to enter a third state, and in the third state, the inductor, the first A capacitor is connected in series with the second capacitor, the resonant power supply provides the output voltage to the output terminal through the inductor, the first capacitor and the second capacitor; the resonant power supply is controlled to enter a second state , in the second state, the resonant power supply provides the output voltage to the output terminal through the inductor.

In terms of hardware implementation, the above-mentioned first control module 401 , second control module 402 , third control module 404 and fourth control module 405 may be processors.

FIG. 13 is a schematic diagram of another possible structure of the controller involved in the above-mentioned embodiments provided by the embodiments of the present application. The controller includes: a processor 501 and a memory 502, and the memory 502 is used to store codes and data of the controller. In this embodiment of the application, the processor 501 is used to control and manage the actions of the controller, for example, the processor 501 is used to support the controller to execute S701 and S702 in the above method embodiments, and/or to Other procedures of the techniques described herein.

Wherein, the processor 502 may include a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute the various illustrative logical blocks, modules and circuits described in connection with the present disclosure. The processor 502 may also be a combination that implements computing functions, for example, a combination of one or more microprocessors, a combination of a digital signal processor and a microprocessor, and the like.

It should be noted that all relevant content of the steps involved in the above method embodiments can be referred to the function description of the corresponding function module, and will not be repeated here. Each device (such as a controller) provided in the embodiments of the present application is used to perform the functions of the corresponding devices in the above embodiments, so the same effect as the above control method can be achieved.

In one aspect of the present application, the embodiment of the present application also provides a terminal device, the terminal device includes a resonant power supply, the resonant power supply includes a controller, the resonant power supply includes the resonant power supply provided in Figure 5 and Figure 6 , the controller Figure 12 and Figure 13 provide the controller.

It should be noted that, for the related description of the resonant power supply and the controller, reference may be made to the related description of the resonant power supply and the controller provided above, which will not be repeated here in the embodiment of the present application.

Another aspect of the present application provides a computer-readable storage medium, the computer-readable storage medium includes computer instructions, and when the computer instructions are run on the device, the device executes the resonant power supply provided by the above method embodiments. Control Method.

In yet another aspect of the present application, a computer program product including instructions is provided, and when it is run on a computer, the computer can execute the method for controlling the resonant power supply provided by the above method embodiments.

In the several embodiments provided in this application, it should be understood that the disclosed devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be Incorporation or may be integrated into another device, or some features may be omitted, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

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

If the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application is essentially or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the software product is stored in a storage medium In, several instructions are included to make the controller execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: various media capable of storing program codes such as U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk.

Finally, it should be noted that: the above is only a specific implementation of the application, but the protection scope of the application is not limited thereto, and any changes or replacements within the technical scope disclosed in the application shall be covered by this application. within the scope of the application. Therefore, the protection scope of the present application should be determined by the protection scope of the claims.

Claims

A control method for a resonant power supply, characterized in that the control method comprises:

Controlling the resonant power supply to enter a first working mode, in the first working mode, the ratio of the input voltage to the output voltage of the resonant power supply is a first value, and the resonant power supply includes an inductor, a first capacitor and a second capacitance;

The resonant power supply is controlled to enter a second working mode. In the second working mode, the ratio is a second value, and the first value is smaller than the second value.
The control method according to claim 1, wherein the first numerical value is 3:1, and the second numerical value is 2:1.
The control method according to claim 1 or 2, wherein the controlling the resonant power supply to enter the first working mode comprises:

controlling the resonant power supply to enter a first state, in the first state, the inductor, the first capacitor and the second capacitor are connected in series, the resonant power supply performs power conversion on the input voltage at the input terminal and providing the output voltage to an output terminal, and charging the inductor, the first capacitor and the second capacitor;

controlling the resonant power supply to enter a second state, and in the second state, the resonant power supply provides the output voltage to the output terminal through the inductor;

Controlling the resonant power supply to enter a third state, in the third state, the first capacitor and the second capacitor are connected in parallel and connected in series with the inductor, and the resonant power supply passes through the inductor, the first providing the output voltage to the output terminal with the capacitor and the second capacitor;

controlling the resonant power supply to enter the second state again.
The control method according to any one of claims 1-3, wherein the controlling the resonant power supply to enter the second working mode comprises:

controlling the resonant power supply to enter a first state, in the first state, the inductor, the first capacitor and the second capacitor are connected in series, the resonant power supply performs power conversion on the input voltage at the input terminal and providing the output voltage to an output terminal, and charging the inductor, the first capacitor and the second capacitor;

controlling the resonant power supply to enter a second state, and in the second state, the resonant power supply provides the output voltage to the output terminal through the inductor;

controlling the resonant power supply to enter a fourth state, in the fourth state, the inductor, the first capacitor and the second capacitor are connected in series, and the resonant power supply passes through the inductor, the first capacitor and The second capacitor provides the output voltage to the output terminal;

controlling the resonant power supply to enter the second state again.
The control method according to claim 3 or 4, wherein the controlling the resonant power supply to enter the second state comprises:

When the resonant power supply enters the first state for a first preset time, the resonant power supply is controlled to enter the second state.
The control method according to claim 3, wherein the controlling the resonant power supply to enter the second state again comprises:

When the resonant power supply enters the third state for a second preset time, the resonant power supply is controlled to enter the second state again.
The control method according to claim 4, wherein the controlling the resonant power supply to enter the second state again comprises:

When the resonant power supply enters the fourth state for a third preset time, the resonant power supply is controlled to enter the second state again.
The control method according to claim 3 or 4, wherein before controlling the resonant power supply to enter a third state or controlling the resonant power supply to enter a fourth state, the method further comprises:

obtaining the current of the inductor;

When the current reaches the zero-crossing threshold, the second state is exited.
The control method according to claim 8, wherein the zero-crossing threshold is 0.
The control method according to any one of claims 1-9, characterized in that, after controlling the resonant power supply to enter the second working mode, the method further comprises:

The resonant power supply is controlled to enter a third working mode, and in the third working mode, the current of the resonant power supply is less than a preset current value.
The control method according to claim 10, wherein the controlling the resonant power supply to enter the third working mode comprises:

controlling the resonant power supply to enter a first state, in the first state, the inductor, the first capacitor and the second capacitor are connected in series, the resonant power supply performs power conversion on the input voltage at the input terminal and providing the output voltage to an output terminal, and charging the inductor, the first capacitor and the second capacitor;

Controlling the resonant power supply to enter a third state, in the third state, the first capacitor and the second capacitor are connected in parallel and connected in series with the inductor, and the resonant power supply passes through the inductor, the first providing the output voltage to the output terminal with the capacitor and the second capacitor;

controlling the resonant power supply to enter the first state again;

controlling the resonant power supply to enter a fourth state, in the fourth state, the inductor, the first capacitor and the second capacitor are connected in series, and the resonant power supply passes through the inductor, the first capacitor and The second capacitor provides the output voltage to the output terminal.
The control method according to any one of claims 1-9, characterized in that, after controlling the resonant power supply to enter the second working mode, the method further comprises:

The resonant power supply is controlled to enter a fourth working mode, and in the fourth working mode, the fluctuation time of the current in the resonant power supply is less than a preset time.
The control method according to claim 12, wherein the controlling the resonant power supply to enter the fourth working mode comprises:

controlling the resonant power supply to enter a first state, in the first state, the inductor, the first capacitor and the second capacitor are connected in series, the resonant power supply performs power conversion on the input voltage at the input terminal and providing the output voltage to an output terminal, and charging the inductor, the first capacitor and the second capacitor;

controlling the resonant power supply to enter a second state, and in the second state, the resonant power supply provides the output voltage to the output terminal through the inductor;

Alternatively, the controlling the resonant power supply to enter a fourth working mode includes:

controlling the resonant power supply to enter a fourth state, in the fourth state, the inductor, the first capacitor and the second capacitor are connected in series, and the resonant power supply passes through the inductor, the first capacitor and The second capacitor provides the output voltage to the output terminal;

The resonant power supply is controlled to enter a second state, and in the second state, the resonant power supply provides the output voltage to the output terminal through the inductor.
A controller, characterized in that the controller includes:

A first control module, configured to control the resonant power supply to enter a first working mode, in the first working mode, the ratio of the input voltage to the output voltage of the resonant power supply is a first value, and the resonant power supply includes an inductor , the first capacitor and the second capacitor;

The second control module is configured to control the resonant power supply to enter a second working mode, and in the second working mode, the ratio is a second value, and the first value is smaller than the second value.
The controller according to claim 14, wherein the first value is 3:1, and the second value is 2:1.
The controller according to claim 14 or 15, wherein the first control module is used for:

controlling the resonant power supply to enter a first state, in the first state, the inductor, the first capacitor and the second capacitor are connected in series, the resonant power supply performs power conversion on the input voltage at the input terminal and providing the output voltage to an output terminal, and charging the inductor, the first capacitor and the second capacitor;

controlling the resonant power supply to enter a second state, and in the second state, the resonant power supply provides the output voltage to the output terminal through the inductor;

Controlling the resonant power supply to enter a third state, in the third state, the first capacitor and the second capacitor are connected in parallel and connected in series with the inductor, and the resonant power supply passes through the inductor, the first providing the output voltage to the output terminal with the capacitor and the second capacitor;

controlling the resonant power supply to enter the second state again.
The controller according to any one of claims 14-16, wherein the second control module is used for:

controlling the resonant power supply to enter a first state, in the first state, the inductor, the first capacitor and the second capacitor are connected in series, the resonant power supply performs power conversion on the input voltage at the input terminal and providing the output voltage to an output terminal, and charging the inductor, the first capacitor and the second capacitor;

controlling the resonant power supply to enter a second state, and in the second state, the resonant power supply provides the output voltage to the output terminal through the inductor;

controlling the resonant power supply to enter a fourth state, in the fourth state, the inductor, the first capacitor and the second capacitor are connected in series, and the resonant power supply passes through the inductor, the first capacitor and The second capacitor provides the output voltage to the output terminal;

controlling the resonant power supply to enter the second state again.
The controller according to claim 16 or 17, wherein the first control module or the second control module is further used for:

When the resonant power supply enters the first state for a first preset time, the resonant power supply is controlled to enter the second state.
The controller according to claim 16, wherein the first control module is further used for:

When the resonant power supply enters the third state for a second preset time, the resonant power supply is controlled to enter the second state again.
The controller according to claim 17, wherein the second control module is further used for:

When the resonant power supply enters the fourth state for a third preset time, the resonant power supply is controlled to enter the second state again.
The controller according to claim 16 or 17, wherein the controller further comprises an acquisition module;

The obtaining module is configured to obtain the current of the inductor before controlling the resonant power supply to enter the third state or controlling the resonant power supply to enter the fourth state;

The first control module or the second control module is further configured to control the resonant power supply to exit the second state when the current reaches a zero-crossing threshold.
The controller according to claim 21, wherein the zero-crossing threshold is zero.
The controller according to any one of claims 14-22, wherein the controller further comprises a third control module;

The third control module is configured to control the resonant power supply to enter a third working mode, and in the third working mode, the current of the resonant power supply is less than a preset current value.
The controller according to claim 23, wherein the third control module is used for:

controlling the resonant power supply to enter a first state, in the first state, the inductor, the first capacitor and the second capacitor are connected in series, the resonant power supply performs power conversion on the input voltage at the input terminal and providing the output voltage to an output terminal, and charging the inductor, the first capacitor and the second capacitor;

Controlling the resonant power supply to enter a third state, in the third state, the first capacitor and the second capacitor are connected in parallel and connected in series with the inductor, and the resonant power supply passes through the inductor, the first providing the output voltage to the output terminal with the capacitor and the second capacitor;

controlling the resonant power supply to enter the first state again;

controlling the resonant power supply to enter a fourth state, in the fourth state, the inductor, the first capacitor and the second capacitor are connected in series, and the resonant power supply passes through the inductor, the first capacitor and The second capacitor provides the output voltage to the output terminal.
The controller according to any one of claims 14-22, wherein the controller further comprises a fourth control module;

The fourth control module is configured to control the resonant power supply to enter a fourth working mode, and in the fourth working mode, the fluctuation time of the current in the resonant power supply is less than a preset time.
The controller according to claim 25, wherein the fourth control module is used for:

controlling the resonant power supply to enter a first state, in the first state, the inductor, the first capacitor and the second capacitor are connected in series, the resonant power supply performs power conversion on the input voltage at the input terminal and providing the output voltage to an output terminal, and charging the inductor, the first capacitor and the second capacitor;

controlling the resonant power supply to enter a second state, and in the second state, the resonant power supply provides the output voltage to the output terminal through the inductor;

Alternatively, the controlling the resonant power supply to enter a fourth working mode includes:

controlling the resonant power supply to enter a fourth state, in the fourth state, the inductor, the first capacitor and the second capacitor are connected in series, and the resonant power supply passes through the inductor, the first capacitor and The second capacitor provides the output voltage to the output terminal;

The resonant power supply is controlled to enter a second state, and in the second state, the resonant power supply provides the output voltage to the output terminal through the inductor.