Multi-phase switching converter and communication method thereof

Abstract

The invention discloses a multiphase switch converter and a communication method, and the method comprises the steps: detecting whether a multiphase switch circuit is powered on or not through a temperature pin after a controller is powered on, and transmitting a plurality of pulse signals to the multiphase switch circuit through a PWM pin after the completion of the power on is detected, and when the multiphase switch circuit detects a plurality of clock signals, the multiphase switch circuit pulls up the voltage of the current pin to a preset level and maintains the preset level for a plurality of time, and at the moment, the controller completes communication handshake. The controller converts the current or voltage information of the current pin in each clock so as to transmit the information of the application scene to the multi-phase switching circuit, and after the scene information is notified by the controller, the handshake communication link is quitted, and then a normal working state is entered. According to the invention, high information reporting precision in different application scenes can be realized, so that the working performance of the system is improved.

Description

Technical Field

[0001] This invention relates to the field of power electronics technology, and more specifically, to a multiphase switching converter and its communication method. Background Technology

[0002] A multiphase switching converter is used to provide high-current, high-power output signals. It includes a controller and multiphase switching circuits. Each phase switching circuit includes a power stage circuit and a drive circuit. The controller generates multiple switching control signals, such as multiple PWM signals, to the corresponding drive circuit of each switching circuit to drive the power switch transistor of that phase. Figure 1 The diagram shown is a circuit block diagram of a multiphase switching converter.

[0003] As load power consumption demands increase, controllers require higher levels of information reporting from multi-phase switching circuits. To achieve accurate current information reporting, multi-phase switching circuits typically need to know input / output voltage information as well as inductance information. Current technologies usually rely on pre-setting parameter values ​​through factory programming to quickly obtain inductance-related information. However, this approach has the drawback of being unable to flexibly adjust the parameters according to different application scenarios. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a multiphase switching converter and its communication method to solve the technical problem of inflexible information reporting in existing multiphase switching circuits.

[0005] According to the communication method of a multiphase switching converter of this application, the multiphase switching converter includes a controller and a multiphase switching circuit, each phase of the multiphase switching circuit includes a chip, the chip including a temperature pin, a PWM pin, and a current pin, including the following steps:

[0006] Step 1: The controller detects whether the multi-phase switching circuit has been powered on via the temperature pin of the multi-phase switching circuit;

[0007] Step 2: After the multi-phase switching circuit is detected to be powered on, the controller sends several pulse signals to the multi-phase switching circuit through the PWM pin as a start signal for communication between the controller and the multi-phase switching circuit. When the multi-phase switching circuit detects several clock signals, the controller and the multi-phase switching circuit complete the communication handshake.

[0008] Step 3: The controller changes the current or voltage information of the current pin to transmit the application scenario parameter information to the multiphase switching circuit. After the controller completes the parameter information notification, the controller and the multiphase switching circuit exit the handshake communication phase and enter the normal working state.

[0009] Preferably, the parameter information of the application scenario is converted into gear position information value or code value for transmission through the current pin.

[0010] Preferably, the controller changes the current or voltage information of the current pin within each clock cycle to transmit the application scenario parameter information to the multiphase switching circuit.

[0011] Preferably, the multiphase switching circuit receives the current or voltage information from the current pin and decodes it to obtain the parameter information of the application scenario, thereby controlling the output power of the multiphase switching circuit.

[0012] Preferably, the controller determines whether the multi-phase switching circuit has been powered on by detecting whether the temperature value of the temperature pin of the multi-phase switching circuit is higher than a first preset value.

[0013] Preferably, after the controller and the multiphase switching circuit successfully communicate and handshake, the multiphase switching circuit output program is turned off.

[0014] Preferably, when the controller and the multiphase switching circuit finish communicating, and the controller detects that the value of the temperature pin is lower than the second threshold, the multiphase switching circuit exits the handshake communication mode and starts the output program.

[0015] Secondly, a multiphase switching converter is provided, the multiphase switching converter including a controller and a multiphase switching circuit, each phase of the multiphase switching circuit including a chip, the chip including a temperature pin, a PWM pin, and a current pin.

[0016] The controller includes a power-on detection circuit, a parameter conversion circuit, and a switching signal circuit.

[0017] After the multiphase switching circuit is powered on, the power-on detection circuit detects whether each phase of the multiphase switching circuit has been powered on through the temperature pin and generates a power-on trigger signal.

[0018] The switching signal circuit receives the power-on trigger signal and generates several pulse signals. The several pulse signals are transmitted to the multi-phase switching circuit through the PWM pin. When the multi-phase switching circuit detects several clock signals, the controller and the multi-phase switching circuit complete a communication handshake.

[0019] The parameter conversion circuit receives parameter information from external application scenarios and converts it into current or voltage information that characterizes the parameter information. The parameter characterization information is then transmitted to the multiphase switching circuit through the current pin.

[0020] Preferably, the parameter conversion circuit converts the received parameter information into a gear position information value or a code value for transmission through the current pin.

[0021] Preferably, depending on the gear position information value or code value, the parameter conversion circuit changes the current or voltage information of the current pin within each clock cycle and transmits it to the multi-phase switching circuit.

[0022] Preferably, when the power-on detection circuit detects that the temperature value of the temperature pin of the multi-phase switch circuit is higher than a first preset value to determine that the multi-phase switch circuit has completed power-on, the controller and the multi-phase switch circuit prepare for handshake communication; when the power-on detection circuit detects that the value of the temperature pin is lower than a second threshold, the controller and the multi-phase switch circuit exit the handshake communication.

[0023] Preferably, when the controller and the multiphase switch circuit successfully complete the communication handshake, the multiphase switch circuit output program is turned off; when the controller and the multiphase switch circuit exit the communication handshake, the multiphase switch circuit starts the output program.

[0024] Thirdly, a communication method for a multiphase switching converter is provided, the multiphase switching converter including a controller and a multiphase switching circuit, each phase of the multiphase switching circuit being integrated into a chip, the chip including a temperature pin, a PWM pin, and a current pin, comprising the following steps:

[0025] Step 1: After the multi-phase switching circuit is powered on, the controller determines whether each phase of the multi-phase switching circuit has been powered on by detecting the temperature of one of the temperature pin, the current pin, or the PWM pin.

[0026] Step 2: After power-on is detected, the controller sends several pulse signals to the multiphase switch circuit through the pins in Step 1 as a start signal for communication between the controller and the multiphase switch circuit. When the multiphase switch circuit detects several clock signals, the controller and the multiphase switch circuit complete the communication handshake.

[0027] Step 3: The controller changes the current or voltage information of the pins from Step 1 to transmit the application scenario parameter information to the multi-phase switching circuit. After the controller completes the parameter information transmission, the controller and the multi-phase switching circuit exit the handshake communication phase and enter normal operating mode.

[0028] In this process, the pins in step one are time-multiplexed in steps one through three.

[0029] Preferably, when the temperature value of the pin in step one is detected to be higher than a first preset value to determine that the multiphase switching circuit has been powered on, the controller and the multiphase switching circuit prepare for handshake communication; when the temperature value of the pin in step one is detected to be lower than a second threshold, the controller and the multiphase switching circuit exit the handshake communication.

[0030] Preferably, the parameter information of the application scenario is converted into different gear position information values ​​or code values, and the gear position information value or code value corresponds to the current or voltage value of the pin.

[0031] Fourthly, a communication method for a multiphase switching converter is provided. The multiphase switching converter includes a controller and a multiphase switching circuit. Each phase of the multiphase switching circuit is integrated into a chip. The chip includes a temperature pin, a PWM pin, and a current pin. The method includes the following steps:

[0032] Step 1: After the multi-phase switching circuit is powered on, the controller detects whether each phase of the multi-phase switching circuit has been powered on through one of the temperature pin, the current pin, or the PWM pin.

[0033] Step 2: After power-on is detected, the controller sends several pulse signals to the multiphase switch circuit through one of the two pins other than those in Step 1 as a start signal for communication between the controller and the multiphase switch circuit. When the multiphase switch circuit detects several clock signals, the controller and the multiphase switch circuit complete the communication handshake.

[0034] Step 3: The controller transforms the current or voltage information of the pins in Step 2 to transmit the application scenario parameter information to the multi-phase switching circuit. After the controller completes the parameter information transmission, the controller and the multi-phase switching circuit exit the handshake communication phase and enter normal operating status.

[0035] In particular, the pins in steps two and three are time-division multiplexed.

[0036] Preferably, when the temperature value of the pin in step one is detected to be higher than a first preset value to determine that the multi-phase switching circuit has been powered on, the controller and the multi-phase switching circuit prepare for handshake communication; when the temperature value of the pin in step one is detected to be lower than a second threshold, the controller and the multi-phase switching circuit exit the handshake communication.

[0037] Preferably, the parameter information of the application scenario is converted into different gear position information values ​​or code values, and the gear position information value or code value corresponds to the current or voltage value of the pin.

[0038] Using the multiphase switching converter and communication method of this invention, the controller, after power-on, communicates via T... OUT The pin detects whether the multi-phase switching circuit has been powered on. Upon successful power-on, several pulse signals are sent to the multi-phase switching circuit via the PWM pin as a start notification signal for communication between the controller and the multi-phase switching circuit. When the multi-phase switching circuit detects several clock signals, it will... OUT The voltage at the pin is pulled high to a preset level and maintained for a certain period of time, at which point the controller completes the communication handshake. The controller then switches to I / O. OUT The current or voltage information of the pins is transmitted to the multiphase switching circuit to convey the application scenario information. After the controller completes the notification of the scenario information, it exits the handshake communication phase and then enters the normal working state. This application allows the controller to transmit relevant parameter information to the multiphase switching circuit via handshake communication before the system officially starts working. In this way, the multiphase switching circuit can maintain a relatively high accuracy in the current reporting information under different application scenarios, thereby improving the system's working performance. Attached Figure Description

[0039] Figure 1 This is a circuit block diagram of a prior art multiphase switching converter;

[0040] Figure 2a This is a first implementation circuit block diagram of the multiphase switching converter according to the present invention;

[0041] Figure 2b Based on Figure 2a A flowchart illustrating the communication method of the multiphase switching converter is shown.

[0042] Figure 3 This is a second implementation circuit block diagram of the multiphase switching converter according to the present invention;

[0043] Figure 4 This is a third implementation circuit block diagram of the multiphase switching converter according to the present invention; Detailed Implementation

[0044] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings, but the present invention is not limited to these embodiments. The present invention covers any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of the present invention.

[0045] To provide the public with a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the invention, but those skilled in the art can fully understand the invention without these details.

[0046] The invention is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. It should be noted that the drawings are in a simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the invention.

[0047] Figure 2a A first implementation circuit block diagram of the multiphase switching converter according to the present invention and Figure 2b Based on Figure 2a The flowchart of the communication method for the multiphase switching converter is shown; as follows: Figure 2a As shown, the multiphase switching converter of this application includes a controller and a multiphase switching circuit. Each phase of the multiphase switching circuit includes a chip, and the chip includes a temperature pin T. OUT PWM pin and current pin I OUT The chip also includes a VIN pin to receive the input voltage and an SW pin to connect to the inductor of the corresponding phase switching circuit. The switching circuit chip integrates a power switch transistor and a control drive circuit for controlling the power switch transistor; the specific circuit structure is not shown here. The controller receives the output feedback signal from the multiphase switching converter, such as V... OUT The controller generates multiple switching control signals, such as multiple PWM signals, to the drive circuit of each phase switching circuit to control the operating state of the power switching transistors. In this example, the controller includes a power-on detection circuit, a parameter conversion circuit, and a switching signal circuit.

[0048] like Figure 2b The diagram illustrates a communication method for a multiphase switching converter according to this application, comprising the following steps:

[0049] Step 1: The controller uses the temperature pin T of the multi-phase switching circuit. OUT The system detects whether the multi-phase switching circuit has been powered on. Specifically, the power-on detection circuit in the controller detects the temperature value of the temperature pin of each phase of the multi-phase switching circuit. If the temperature value of the temperature pin of the multi-phase switching circuit is higher than a first preset value, it determines that the multi-phase switching circuit has been powered on and generates a power-on trigger signal Vs. If the power-on trigger signal Vs indicates that the multi-phase switching circuit has been powered on, the controller and the multi-phase switching circuit prepare for handshake communication. Here, the temperature value and the first preset value can be represented by corresponding voltage values. The power-on detection circuit can be a comparator or other circuit structure.

[0050] Step Two: After the multi-phase switching circuit is detected to be powered on, the controller sends several pulse signals to the multi-phase switching circuit through the PWM pin as a start signal for communication between the controller and the multi-phase switching circuit. When the multi-phase switching circuit detects several clock signals, the controller and the multi-phase switching circuit complete a communication handshake. Specifically, the switch signal circuit in the controller receives the power-on trigger signal Vs and generates several pulse signals accordingly. These pulse signals are transmitted to the multi-phase switching circuit through the PWM pin. The pulse signals transmitted to each phase of the multi-phase switching circuit can be the same or different, as long as each phase switching circuit can recognize them. The chip of the multi-phase switching circuit can be equipped with a signal recognition circuit. When a specific pulse signal is recognized, the relevant pin prepares to enter the handshake communication state. Here, the switch signal circuit can generate the aforementioned pulse signals through a clock oscillator. The switch signal circuit also receives the output feedback signal Vs. OUT This generates a switching control signal, which can be an existing feedback loop control circuit, such as a circuit structure including an error amplifier circuit, a comparator, a switching transistor, and logic circuits.

[0051] Step 3: The controller changes the current pin I. OUT The controller transmits current or voltage information to the multi-phase switching circuit to provide parameter information for the application scenario. After the controller completes the notification of the parameter information, the controller and the multi-phase switching circuit exit the handshake communication phase and enter normal operation. Specifically, the parameter conversion circuit in the controller receives external parameter information, such as the inductance value of the inductor, the capacitance value of the capacitor, the ambient temperature, humidity, etc. The parameter information can be one or more of these parameters. The parameter conversion circuit converts the received parameter information into a gear position information value or a code value V. W Different parameter values ​​represent different gear positions or different code values. These gear position or code values ​​correspond to the current or voltage values ​​of the current pins. Therefore, different parameters are represented by different current or voltage values. Within each clock cycle, the parameter conversion circuit transforms the current or voltage information of the current pins and transmits it to the multi-phase switching circuit. The parameter conversion circuit can be implemented using circuit structures such as counters.

[0052] After the controller completes the parameter information notification, the controller and the multiphase switching circuit exit the handshake communication phase and enter normal operating mode. Specifically, a power-on detection circuit can be used to detect the value of the temperature pin to exit the handshake communication. For example, when the power-on detection circuit detects that the value of the temperature pin is lower than a second threshold, the controller and the multiphase switching circuit exit the handshake communication. Here, the first preset value and the second threshold are different.

[0053] Preferably, after the controller and the multi-phase switching circuit successfully complete the communication handshake, the multi-phase switching circuit outputs its program and then shuts down. Conversely, after the controller and the multi-phase switching circuit exit the communication handshake, the multi-phase switching circuit starts its output program. That is, during the initial parameter information communication phase, the multi-phase switching circuit does not output power to avoid power inaccuracies and further save power consumption.

[0054] With the above control scheme, before the multi-phase switching circuit officially starts working, the controller and the multi-phase switching circuit communicate with each other to quickly transmit parameter information to the switching circuit. The switching circuit can configure the output current or output power according to the known parameter information, thereby improving the accuracy and working efficiency of the system.

[0055] refer to Figure 3 This is a second implementation circuit block diagram of the multiphase switching converter according to the present invention; in this embodiment, the controller and multiphase switching circuit of the multiphase switching converter are similar to those of the previous embodiment, except that in this embodiment, only the temperature pin T is used. OUT PWM pin and current pin I OUT One of them performs handshake communication and transmits parameter information. The controller in this embodiment may include a power-on detection circuit, a parameter conversion circuit, and a switching signal circuit. In this embodiment, the communication method of the multiphase switching converter includes the following steps:

[0056] Step 1: After the multi-phase switching circuit is powered on, the controller determines whether each phase of the multi-phase switching circuit has been powered on by detecting the temperature of one of the temperature pin, current pin, or PWM pin. Specifically, when the temperature value of one of the three pins is higher than a first preset value to determine that the multi-phase switching circuit has been powered on, the controller and the multi-phase switching circuit prepare for handshake communication. In this step, the temperature value of a certain pin is detected by the power-on detection circuit, and the detection method can be the same as in the first embodiment. Figure 3 Taking the PWM pin as an example.

[0057] Step Two: Upon detection of power-on completion, the controller sends several pulse signals to the multi-phase switching circuit via pins from Step One, such as the PWM pin, as a start signal for communication between the controller and the multi-phase switching circuit. When the multi-phase switching circuit detects several clock cycles, the controller and the multi-phase switching circuit complete a communication handshake. Specifically, the switching signal circuit may receive the output signal from the power-on detection circuit and generate several pulse signals based on the output signal. The pulse signals in this embodiment can be generated in the same way as in the first embodiment.

[0058] Step 3: The controller transforms the current or voltage information of the pins in Step 1, such as the PWM pins, to transmit the application scenario parameter information to the multiphase switching circuit. After the controller completes the parameter information notification, the controller and the multiphase switching circuit exit the handshake communication phase and enter normal working state. Specifically, the parameter conversion circuit may receive external parameter signals and convert them into different gear information values ​​or code values ​​according to the different application scenario parameter information. The gear information value or code value corresponds to the current or voltage value of the PWM pin, thereby transmitting the relevant application parameter information to the multiphase switching circuit.

[0059] In this embodiment, the pins in step one are time-division multiplexed in steps one through three. According to this embodiment, the PWM pins need to detect or transmit different signals in each step. Therefore, to avoid signal confusion in different stages, they can be time-division multiplexed in different stages. However, since time-division multiplexing requires controlling the start or end time of each stage, the multi-phase switching circuit can be equipped with detection and triggering circuits. For example, after detecting the power-on detection stage, it enters the pulse signal transmission stage to ensure that each stage does not interfere with each other.

[0060] Finally, once the controller and the multiphase switching circuit have completed their handshake communication, the temperature of a pin from step one, such as the PWM pin, can be detected. If the temperature is below a second threshold, the controller and the multiphase switching circuit exit the handshake communication state, and the entire system enters normal operating mode.

[0061] In this embodiment, the parameter that can be transmitted is a single value, such as inductance or capacitance. In this case, information can be transmitted through only one pin, and the system can quickly obtain accurate parameter information before formal operation. It can be applied to different occasions and has high system efficiency. Figure 3 The embodiment uses the PWM pin as an example, but the solution of this embodiment can also be implemented using the temperature pin or the current pin.

[0062] Figure 4 This is a third implementation circuit block diagram of the multiphase switching converter according to the present invention; in this embodiment, the controller and multiphase switching circuit of the multiphase switching converter are similar to those of the previous embodiment, except that in this embodiment, only the temperature pin T is used. OUT PWM pin and current pin I OUT Two pins in the circuit are used for handshake communication and parameter information transmission. The controller in this embodiment may include a power-on detection circuit, a pulse generation circuit, a parameter conversion circuit, and a switching signal circuit. In this embodiment, the communication method of the multiphase switching converter includes the following steps:

[0063] Step 1: After the multi-phase switching circuit is powered on, the controller detects one of the temperature pin, current pin, or PWM pin, such as the temperature pin T. OUT The temperature is used to determine whether each phase of the multiphase switch circuit has been powered on. Specifically, when the temperature value of one of the three pins is higher than a first preset value to determine that the multiphase switch circuit has been powered on, the controller and the multiphase switch circuit prepare for handshake communication; in this step, the temperature value of a certain pin is detected by the power-on detection circuit, and the detection can be the same as the detection method in the first embodiment. Figure 4 Taking the PWM pin as an example.

[0064] Step 2: After power-on is detected, the controller uses one of the two pins other than those in Step 1, such as the current pin I. OUT Several pulse signals are sent to the multiphase switching circuit as start signals for communication between the controller and the multiphase switching circuit. When the multiphase switching circuit detects several clock cycles, the controller and the multiphase switching circuit complete a communication handshake. Specifically, the pulse generation circuit can receive the output signal of the power-on detection circuit and generate several pulse signals based on the output signal. In this embodiment, the pulse signals can be generated in the same way as an oscillator. The switching signal circuit also receives the output feedback signal V. OUT This is to achieve loop feedback control of the circuit.

[0065] Step 3: The controller transforms the current or voltage information of the pins in Step 2 (e.g., the current pin) to transmit the application scenario parameter information to the multiphase switching circuit. After the controller completes the parameter information notification, the controller and the multiphase switching circuit exit the handshake communication phase and enter normal working state. Specifically, the parameter conversion circuit may receive external parameter signals and convert them into different gear information values ​​or code values ​​according to the different application scenario parameter information. The gear information value or code value corresponds to the current or voltage value of the PWM pin, thereby transmitting the relevant application parameter information to the multiphase switching circuit through the current pin.

[0066] In this embodiment, the pins in step two, such as the current pins, are time-division multiplexed in steps two and three. According to this embodiment, since the current pins in steps two and three need to detect or transmit different signals, they can be time-division multiplexed in different stages to avoid signal confusion. However, since time-division multiplexing requires control over the start and end times of each stage, the multiphase switching circuit can be equipped with detection and triggering circuits. For example, after detecting the power-on detection stage, it enters the pulse signal transmission stage to ensure that each stage does not interfere with the others.

[0067] Finally, once the controller and the multiphase switching circuit have completed their handshake communication, the controller and the multiphase switching circuit can further exit the handshake communication state by detecting the temperature value of a pin from step one, such as the temperature pin. If the temperature value is lower than a second threshold, the entire system enters normal operating mode.

[0068] In this embodiment, one or two parameters are suitable for transmission, such as inductance and / or capacitance values. In this case, information transmission can be achieved through only two pins, ensuring that the system quickly obtains accurate parameter information before formal operation. It can be used in various situations, resulting in high system efficiency. This embodiment uses temperature and current pins as examples. Those skilled in the art will know that temperature and PWM pins can also be used for parameter communication transmission, or any combination of two temperature, current, and PWM pins can be used, but time-division multiplexing is required in all cases.

[0069] In the second and third embodiments, after the controller and the multiphase switching circuit successfully complete a communication handshake, the multiphase switching circuit output program is shut down; when the controller and the multiphase switching circuit exit the communication handshake, the multiphase switching circuit starts its output program. This makes the controlled output power more accurate and avoids energy waste.

[0070] It should be noted that the specific implementations and corresponding illustrations provided are merely one way of describing the implementation method of the present invention, and are not intended to limit the specific structure of the implementation scheme of the present invention. Various changes or modifications can be made to these implementation schemes without departing from the principles and essence of the present invention, but all such changes and modifications fall within the protection scope of the present invention.

[0071] Although the embodiments are described and illustrated separately above, some common technologies are involved. Those skilled in the art can replace and integrate them between the embodiments. If there is any content not explicitly described in one embodiment, then another embodiment that is described can be referred to.

[0072] The embodiments described above do not constitute a limitation on the scope of protection of this technical solution. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the above embodiments should be included within the scope of protection of this technical solution.

Claims

1. A communication method for a multiphase switching converter, the multiphase switching converter comprising a controller and a multiphase switching circuit, each phase of the multiphase switching circuit comprising a chip, the chip comprising a temperature pin, a PWM pin, and a current pin, characterized in that it includes the following steps: Step 1: The controller detects whether the multi-phase switching circuit has been powered on via the temperature pin of the multi-phase switching circuit; Step 2: After the multi-phase switching circuit is detected to be powered on, the controller sends several pulse signals to the multi-phase switching circuit through the PWM pin as a start signal for communication between the controller and the multi-phase switching circuit. When the multi-phase switching circuit detects several clock signals, the controller and the multi-phase switching circuit complete the communication handshake. Step 3: The controller changes the current or voltage information of the current pin to transmit the application scenario parameter information to the multiphase switching circuit. After the controller completes the parameter information notification, the controller and the multiphase switching circuit exit the handshake communication phase and enter the normal working state.

2. The communication method for a multiphase switching converter according to claim 1, characterized in that, The parameter information of the application scenario is converted into gear position information value or code value for transmission through the current pin.

3. The communication method for a multiphase switching converter according to claim 1, characterized in that, The controller changes the current or voltage information of the current pin within each clock cycle to transmit the parameter information of the application scenario to the multiphase switching circuit.

4. The communication method for a multiphase switching converter according to claim 1, characterized in that, The multiphase switching circuit receives the current or voltage information from the current pin and decodes it to obtain the parameter information of the application scenario, thereby controlling the output power of the multiphase switching circuit.

5. The communication method for a multiphase switching converter according to claim 1, characterized in that, The controller determines whether the multiphase switching circuit has been powered on by detecting whether the temperature value of the temperature pin of the multiphase switching circuit is higher than a first preset value.

6. The communication method for a multiphase switching converter according to claim 1, characterized in that, Once the controller and the multiphase switching circuit successfully communicate and handshake, the multiphase switching circuit outputs a program to shut down.

7. The communication method for a multiphase switching converter according to claim 6, characterized in that, When the controller and the multiphase switching circuit finish communicating, and the controller detects that the value of the temperature pin is lower than the second threshold, the multiphase switching circuit exits the handshake communication mode and starts the output program.

8. A multiphase switching converter, the multiphase switching converter comprising a controller and a multiphase switching circuit, each phase of the multiphase switching circuit comprising a chip, the chip comprising a temperature pin, a PWM pin, and a current pin, characterized in that, The controller includes a power-on detection circuit, a parameter conversion circuit, and a switching signal circuit. After the multiphase switching circuit is powered on, the power-on detection circuit detects whether each phase of the multiphase switching circuit has been powered on through the temperature pin and generates a power-on trigger signal. The switching signal circuit receives the power-on trigger signal and generates several pulse signals. The several pulse signals are transmitted to the multi-phase switching circuit through the PWM pin. When the multi-phase switching circuit detects several clock signals, the controller and the multi-phase switching circuit complete a communication handshake. The parameter conversion circuit receives parameter information from external application scenarios and converts it into current or voltage information that characterizes the parameter information. The parameter characterization information is then transmitted to the multiphase switching circuit through the current pin.

9. The multiphase switching converter according to claim 8, characterized in that, The parameter conversion circuit converts the received parameter information into gear position information or code value for transmission through the current pin.

10. The multiphase switching converter according to claim 9, characterized in that, Depending on the gear position information value or code value, the parameter conversion circuit changes the current or voltage information of the current pin within each clock cycle and transmits it to the multiphase switching circuit.

11. The multiphase switching converter according to claim 8, characterized in that, When the power-on detection circuit detects that the temperature value of the temperature pin of the multi-phase switch circuit is higher than the first preset value and determines that the multi-phase switch circuit has completed power-on, the controller and the multi-phase switch circuit prepare to handshake communication. When the power-on detection circuit detects that the value of the temperature pin is lower than the second threshold, the controller and the multiphase switch circuit exit the handshake communication.

12. The multiphase switching converter according to claim 8, characterized in that, After the controller and the multiphase switching circuit successfully communicate and handshake, the multiphase switching circuit outputs a program to shut down. After the controller and the multiphase switching circuit exit the communication handshake, the multiphase switching circuit starts the output program.

13. A communication method for a multiphase switching converter, the multiphase switching converter including a controller and a multiphase switching circuit, each phase of the multiphase switching circuit being integrated into a chip, the chip including a temperature pin, a PWM pin, and a current pin, characterized in that it includes the following steps: Step 1: After the multi-phase switching circuit is powered on, the controller determines whether each phase of the multi-phase switching circuit has been powered on by detecting the temperature of one of the temperature pin, the current pin, or the PWM pin. Step 2: After power-on is detected, the controller sends several pulse signals to the multiphase switch circuit through the pins in Step 1 as a start signal for communication between the controller and the multiphase switch circuit. When the multiphase switch circuit detects several clock signals, the controller and the multiphase switch circuit complete the communication handshake. Step 3: The controller changes the current or voltage information of the pins from Step 1 to transmit the application scenario parameter information to the multi-phase switching circuit. After the controller completes the parameter information transmission, the controller and the multi-phase switching circuit exit the handshake communication phase and enter normal operating mode. in, The pins in step one are time-multiplexed in steps one through three.

14. The communication method for a multiphase switching converter according to claim 13, characterized in that, When the temperature value of the pin in step one is detected to be higher than the first preset value to determine that the multiphase switching circuit has been powered on, the controller and the multiphase switching circuit prepare to handshake communication. When the temperature value of the pin in step one is detected to be lower than the second threshold, the controller and the multiphase switching circuit exit the handshake communication.

15. The communication method for a multiphase switching converter according to claim 13, characterized in that, Depending on the different parameter information of the application scenario, it is converted into different gear information values ​​or code values, and the gear information value or code value corresponds to the current or voltage value of the pin.

16. A communication method for a multiphase switching converter, the multiphase switching converter including a controller and a multiphase switching circuit, each phase of the multiphase switching circuit being integrated into a chip, the chip including a temperature pin, a PWM pin, and a current pin, characterized in that it includes the following steps: Step 1: After the multi-phase switching circuit is powered on, the controller detects whether each phase of the multi-phase switching circuit has been powered on through one of the temperature pin, the current pin, or the PWM pin. Step 2: After power-on is detected, the controller sends several pulse signals to the multiphase switch circuit through one of the two pins other than those in Step 1 as a start signal for communication between the controller and the multiphase switch circuit. When the multiphase switch circuit detects several clock signals, the controller and the multiphase switch circuit complete the communication handshake. Step 3: The controller transforms the current or voltage information of the pins in Step 2 to transmit the application scenario parameter information to the multi-phase switching circuit. After the controller completes the parameter information transmission, the controller and the multi-phase switching circuit exit the handshake communication phase and enter normal operating status. in, Pins in steps two and three are time-division multiplexed.

17. The communication method for a multiphase switching converter according to claim 16, characterized in that, When the temperature value of the pin in step one is detected to be higher than the first preset value to determine that the multiphase switching circuit has been powered on, the controller and the multiphase switching circuit prepare to handshake and communicate. When the temperature value of the pin in step one is detected to be lower than the second threshold, the controller and the multiphase switching circuit exit the handshake communication.

18. The communication method for a multiphase switching converter according to claim 16, characterized in that, Depending on the different parameter information of the application scenario, it is converted into different gear information values ​​or code values, and the gear information value or code value corresponds to the current or voltage value of the pin.

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