GPU multiphase voltage reduction adjusting method and device

Abstract

The invention discloses a GPU multiphase voltage reduction adjusting method and device, and relates to the field of circuit board power supply design. Comprising the steps that a multi-phase step-down circuit is deployed, the multi-phase step-down circuit comprises a multi-phase controller module, a multi-phase driving circuit and a GPU module, and all phases of driving circuits in the multi-phase driving circuit are connected in parallel; adjusting the multi-phase voltage of the GPU through a multi-phase step-down circuit: setting an adjusting parameter through the GPU, transmitting the adjusting parameter to a multi-phase controller module by using a PMBUS, and automatically adjusting each phase PWM signal to a driving circuit of a corresponding phase through the multi-phase controller module according to the adjusting parameter and a detected load current; corresponding phase parallel signals are output through the multi-phase driving circuit and then filtered through the output capacitor, and output adjusting voltage with small ripple waves is obtained.

Description

Technical Field

[0001] The invention discloses a GPU multi-phase voltage reduction regulation method and device, and relates to the field of circuit board power supply design. Background Art

[0002] GPU chips are widely used in various intelligent terminal devices, such as PCs, workstations, game consoles, mobile phones and tablets, to perform tasks that require large-scale parallel computing, such as graphics rendering, image processing, and numerical analysis. With the development of technologies such as artificial intelligence, cloud computing, and big data, the demand for GPUs in high-performance computing, games, and virtual reality is increasing. For GPUs, the requirements for fast transient response with high current and low voltage are also increasing. However, the demand for fast adjustment of GPU core voltage in different scenarios cannot be met at present. Summary of the invention

[0003] Aiming at the problem of lack of power supply design schemes with high current and low core voltage in the field of image processing, the present invention provides a GPU multi-phase voltage reduction regulation method and device, which performs multi-phase voltage reduction on the GPU core voltage and improves the response speed and dynamic regulation capability of the power supply.

[0004] The specific scheme proposed by the present invention is:

[0005] The present invention provides a GPU multi-phase voltage reduction regulation method, comprising:

[0006] Deploy a multi-phase buck circuit, which includes a multi-phase controller module, a multi-phase drive circuit and a GPU module. Each phase drive circuit in the multi-phase drive circuit is connected in parallel. Each phase drive circuit includes a driver, a power MOSFET module and a power inductor. The power MOSFET module includes a high-side MOS tube and a low-side MOSFET. The high-side MOS tube and the low-side MOS tube are respectively connected through the output end of the driver, and the drains of the high-side MOS tube and the low-side MOS tube are connected. A power inductor is connected at the drain connection. Each phase drive circuit outputs a signal through the power inductor.

[0007] The multi-phase voltage of the GPU is regulated by a multi-phase step-down circuit: the adjustment parameters are set by the GPU, and the adjustment parameters are transmitted to the multi-phase controller module by using the PMBUS bus. The multi-phase controller module automatically adjusts the PWM signal of each phase to the drive circuit of the corresponding phase according to the adjustment parameters and the detected load current; the multi-phase drive circuit outputs the parallel signal of the corresponding phase, and then filters it through the output capacitor to obtain an output regulated voltage with a smaller ripple.

[0008] Furthermore, in the GPU multi-phase buck regulation method, a driver is provided including a control logic module, a comparator HS and a comparator LS, a PWM signal is received through the control logic module, and a HS_ON signal and a LS_ON signal are respectively output to the comparator HS and the comparator LS according to the PWM signal, and signals are respectively output to the gates of the high-side MOS tube and the low-side MOS tube through the comparator HS and the comparator LS.

[0009] Furthermore, in the GPU multi-phase buck regulation method, the multi-phase driving circuit input end is also connected to a multi-phase input capacitor Cin, the DC ripple is processed by the input capacitor Cin, and the electrolytic capacitor provides charge to meet the transient response of the load, using the formula:

[0010]

[0011] Combine multiple input capacitors Cinphase into input capacitor Cin, where Cinphase is the input capacitor of each phase and Iphasemax is the maximum current that each phase can output.

[0012] Dadj=Vout / Vin*power conversion efficiency, ΔVin is the change in input voltage ripple, and Fsw is the switching frequency.

[0013] Furthermore, the multi-phase voltage of the GPU is regulated by the multi-phase voltage reduction circuit in the multi-phase voltage reduction regulation method, including: setting the current hysteresis value and the current threshold of each phase in the regulation parameters by the GPU, transmitting the current hysteresis value and the current threshold of each phase to the multi-phase controller module by using the PMBUS bus,

[0014] The current threshold of each phase is added together through the multi-phase controller module to obtain the threshold of the corresponding phase number. According to the load current and the threshold of the phase number, it is determined which phases need to open the PWM channel, and the PWM signal is sent to the drive circuit of the corresponding phase according to the opened PWM channel.

[0015] Furthermore, in the GPU multi-phase buck regulation method, when the load current changes, the multi-phase controller module automatically increases or decreases the number of phases to control the opening of the PWM channel, wherein when the load current increases to exceed the maximum value of the current phase number threshold, and reaches the minimum value of the threshold of other phase numbers after adding the current hysteresis value, it is increased to the corresponding phase number,

[0016] When the load current decreases to below the minimum threshold value of the current phase number and reaches the maximum threshold value of other phase numbers after subtracting the current hysteresis value, it is reduced to the corresponding phase number.

[0017] The present invention provides a GPU multi-phase buck regulation device, comprising a multi-phase buck circuit management module,

[0018] The multi-phase buck circuit management module deploys a multi-phase buck circuit. The multi-phase buck circuit includes a multi-phase controller module, a multi-phase drive circuit and a GPU module. Each phase drive circuit in the multi-phase drive circuit is connected in parallel. Each phase drive circuit includes a driver, a power MOSFET module and a power inductor. The power MOSFET module includes a high-side MOS tube and a low-side MOSFET. The high-side MOS tube and the low-side MOS tube are respectively connected through the output end of the driver, and the drains of the high-side MOS tube and the low-side MOS tube are connected. The power inductor is connected at the drain connection. Each phase drive circuit outputs a signal through the power inductor.

[0019] The multi-phase buck circuit management module adjusts the multi-phase voltage of the GPU through the multi-phase buck circuit: the adjustment parameters are set through the GPU, and the adjustment parameters are transmitted to the multi-phase controller module via the PMBUS bus. The multi-phase controller module automatically adjusts the PWM signal of each phase to the drive circuit of the corresponding phase according to the adjustment parameters and the detected load current; the multi-phase drive circuit outputs the parallel signal of the corresponding phase, and then filters it through the output capacitor to obtain an output adjustment voltage with smaller ripple.

[0020] Furthermore, the driver of the GPU multi-phase buck regulation device includes a control logic module, a comparator HS and a comparator LS, which receives a PWM signal through the control logic module, outputs a HS_ON signal and a LS_ON signal to the comparator HS and the comparator LS respectively according to the PWM signal, and outputs signals to the gates of the high-side MOS tube and the low-side MOS tube respectively through the comparator HS and the comparator LS.

[0021] Furthermore, the multi-phase driving circuit input end of the GPU multi-phase buck regulation device is also connected to a multi-phase input capacitor Cin, and the DC ripple is processed by the input capacitor Cin, and the electrolytic capacitor provides charge to meet the transient response of the load, using the formula:

[0022]

[0023] Combine multiple input capacitors Cinphase into input capacitor Cin, where Cinphase is the input capacitor of each phase and Iphasemax is the maximum current that each phase can output.

[0024] Dadj=Vout / Vin*power conversion efficiency, ΔVin is the change in input voltage ripple, and Fsw is the switching frequency.

[0025] Furthermore, the multi-phase buck circuit management module of the GPU multi-phase buck regulation device regulates the multi-phase voltage of the GPU through the multi-phase buck circuit, including: setting the current hysteresis value and the current threshold of each phase in the regulation parameter through the GPU, and transmitting the current hysteresis value and the current threshold of each phase to the multi-phase controller module by using the PMBUS bus,

[0026] The current threshold of each phase is added together through the multi-phase controller module to obtain the threshold of the corresponding phase number. According to the load current and the threshold of the phase number, it is determined which phases need to open the PWM channel, and the PWM signal is sent to the drive circuit of the corresponding phase according to the opened PWM channel.

[0027] Furthermore, when the load current of the GPU multi-phase buck regulation device changes, the multi-phase buck circuit management module automatically increases or decreases the number of phases through the multi-phase controller module to control the opening of the PWM channel, wherein when the load current increases to exceed the maximum value of the current phase number threshold, and reaches the minimum value of the threshold of other phase numbers after adding the current hysteresis value, the multi-phase controller module increases the corresponding phase number,

[0028] When the load current decreases to below the minimum threshold value of the current phase number and reaches the maximum threshold value of other phase numbers after subtracting the current hysteresis value, the multi-phase controller module reduces the corresponding phase number.

[0029] The benefits of the method of the present invention are:

[0030] Aiming at the requirements of high current, low voltage, fast transient response and low power consumption in the field of image processing, a low-cost GPU multi-phase buck regulation method is designed. It uses a combination of a multi-phase controller and a multi-phase drive circuit. Compared with a single-phase buck regulator, it improves efficiency and thermal performance and improves the overshoot problem during load transients. The drive circuit design is simple and easy to transplant, which can meet the needs of different scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 The invention is a schematic diagram of a multi-phase step-down circuit.

[0032] Figure 2 It is a schematic diagram of the connection between the driver and power MOSFET in a multi-phase buck circuit.

[0033] Figure 3 This is the circuit diagram of the driver.

[0034] Figure 4 The present invention relates to a schematic diagram of conditions for automatically adjusting the number of phases. DETAILED DESCRIPTION

[0035] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0036] Example 1

[0037] The present invention provides a GPU multi-phase voltage reduction regulation method, comprising:

[0038] Step 1: Deploy a multi-phase buck circuit, refer to Figure 1 and 2 The multi-phase buck circuit includes a multi-phase controller module, a multi-phase drive circuit and a GPU module. Each phase drive circuit in the multi-phase drive circuit is connected in parallel. Figure 1 and 2 The figure shows a three-phase drive circuit. Each phase drive circuit includes a driver, a power MOSFET module and a power inductor L. The power MOSFET module includes a high-side MOS tube and a low-side MOSFET. The high-side MOS tube H_FET and the low-side MOS tube L_FET are respectively connected through the output end of the driver. The drains of the high-side MOS tube H_FET and the low-side MOS tube L_FET are connected, and the power inductor L is connected at the drain connection. Each phase drive circuit outputs a signal through the power inductor L.

[0039] Among them, the PC port can be used to burn the initial version of the firmware to the multi-phase controller module through the burner and PMBUS interface. According to the PWM signal sent by the multi-phase controller module, the gate of the power MOSFET module is controlled to turn on the high-side MOSFET of a certain phase and turn off the low-side MOSFET, and turn off the high-side MOSFET of other phases and turn on the low-side MOSFET, output multiple phase signals, and after filtering by power inductors and capacitors, output phase voltages with smaller ripples, which are combined in parallel to form the final output voltage.

[0040] The multi-phase drive circuit input end is also connected to a multi-phase input capacitor Cin. The DC ripple is processed by the input capacitor Cin, and the electrolytic capacitor provides charge to meet the transient response of the load. The formula is:

[0041]

[0042] Combine multiple input capacitors Cinphase into input capacitor Cin, where Cinphase is the input capacitor of each phase and Iphasemax is the maximum current that each phase can output.

[0043] Dadj=Vout / Vin*power conversion efficiency, ΔVin is the change in input voltage ripple, and Fsw is the switching frequency.

[0044] When calculating the output capacitor Cout, consider the transient change of the balanced load. When the load steps, when the output voltage drops below the set value, a certain amount of charge is pulled out from the output capacitor. When the load is released, the excess charge in the inductor will be dumped into the output capacitor in a short time.

[0045] refer to Figure 3 The driver may further include a control logic module, a comparator HS and a comparator LS, receive a PWM signal through the control logic module, output a HS_ON signal and a LS_ON signal to the comparator HS and the comparator LS respectively according to the PWM signal, and output signals to the gates of the high-side MOS tube and the low-side MOS tube respectively through the comparator HS and the comparator LS.

[0046] Step 2: Regulate the multi-phase voltage of the GPU through a multi-phase buck circuit: Set the adjustment parameters through the GPU, and transmit the adjustment parameters to the multi-phase controller module using the PMBUS bus. The multi-phase controller module automatically adjusts the PWM signal of each phase to the drive circuit of the corresponding phase according to the adjustment parameters and the detected load current; the multi-phase drive circuit outputs the parallel signal of the corresponding phase, and then filters it through the output capacitor to obtain an output regulated voltage with a smaller ripple.

[0047] Example 2

[0048] Step 1: deploy a multi-phase buck circuit, which includes a multi-phase controller module, a multi-phase drive circuit and a GPU module. Each phase drive circuit in the multi-phase drive circuit is connected in parallel. Each phase drive circuit includes a driver, a power MOSFET module and a power inductor. The power MOSFET module includes a high-side MOS tube and a low-side MOSFET. The high-side MOS tube and the low-side MOS tube are respectively connected through the output end of the driver, and the drains of the high-side MOS tube and the low-side MOS tube are connected. A power inductor is connected at the drain connection point. Each phase drive circuit outputs a signal through the power inductor.

[0049] Step 2: Regulate the multi-phase voltage of the GPU through a multi-phase buck circuit: Set the adjustment parameters through the GPU, and transmit the adjustment parameters to the multi-phase controller module using the PMBUS bus. The multi-phase controller module automatically adjusts the PWM signal of each phase to the drive circuit of the corresponding phase according to the adjustment parameters and the detected load current; the multi-phase drive circuit outputs the parallel signal of the corresponding phase, and then filters it through the output capacitor to obtain an output regulated voltage with a smaller ripple.

[0050] The multi-phase voltage of the GPU is adjusted by the multi-phase step-down circuit, which may further include: setting the current hysteresis value and the current threshold of each phase in the adjustment parameter by the GPU, and transmitting the current hysteresis value and the current threshold of each phase to the multi-phase controller module by using the PMBUS bus,

[0051] The current threshold of each phase is added together through the multi-phase controller module to obtain the threshold of the corresponding phase number. According to the load current and the threshold of the phase number, it is determined which phases need to open the PWM channel, and the PWM signal is sent to the drive circuit of the corresponding phase according to the opened PWM channel.

[0052] And when the load current changes, the multi-phase controller module automatically increases or decreases the number of phases to control the opening of the PWM channel. When the load current increases to exceed the maximum value of the current phase number threshold and reaches the minimum value of the threshold of other phase numbers after adding the current hysteresis value, it is increased to the corresponding phase number.

[0053] When the load current decreases to below the minimum threshold value of the current phase number and reaches the maximum threshold value of other phase numbers after subtracting the current hysteresis value, it is reduced to the corresponding phase number.

[0054] For example, a 6-phase buck circuit is deployed. The GPU writes the current lag value of the corresponding register through the PMBUS bus to prevent the error problem of premature start when increasing or decreasing the phase; the threshold of the corresponding register phase is written to perform 6-phase control, which can be divided into light load single-phase mode, single-phase mode, 2-phase mode, 3-phase mode, 4-phase mode, 5-phase mode and 6-phase mode. The threshold of phase increase and decrease in the 6-phase controller module can be referred to Table 1.

[0055] Table 1

[0056]

[0057] The multi-phase controller automatically adjusts the output of each PWM signal according to the detected load current Iload and the current threshold of each phase, thereby controlling the opening and closing of the phase power supply.

[0058] When the multi-phase controller automatically increases or decreases the number of phases, refer to Figure 4 , this process is the conversion process between 3-phase control and 4-phase control. If the increase of load current exceeds the 3-phase threshold, the multi-phase controller still outputs a 3-phase PWM signal; if the load current continues to increase and exceeds the sum of the 3-phase threshold and the current hysteresis value, the multi-phase controller outputs a 4-phase PWM signal and enters the 4-phase control mode. Conversely, if the load current decreases to the minimum value of the 4-phase threshold, the multi-phase controller still outputs a 4-phase PWM signal; if the load current continues to decrease and reaches the maximum value of the 3-phase threshold after subtracting the current hysteresis value, the multi-phase controller outputs a 3-phase PWM signal and enters the 3-phase control mode.

[0059] Example 3

[0060] The present invention provides a GPU multi-phase buck regulation device, comprising a multi-phase buck circuit management module,

[0061] The multi-phase buck circuit management module deploys a multi-phase buck circuit. The multi-phase buck circuit includes a multi-phase controller module, a multi-phase drive circuit and a GPU module. Each phase drive circuit in the multi-phase drive circuit is connected in parallel. Each phase drive circuit includes a driver, a power MOSFET module and a power inductor. The power MOSFET module includes a high-side MOS tube and a low-side MOSFET. The high-side MOS tube and the low-side MOS tube are respectively connected through the output end of the driver, and the drains of the high-side MOS tube and the low-side MOS tube are connected. The power inductor is connected at the drain connection. Each phase drive circuit outputs a signal through the power inductor.

[0062] The multi-phase buck circuit management module adjusts the multi-phase voltage of the GPU through the multi-phase buck circuit: the adjustment parameters are set through the GPU, and the adjustment parameters are transmitted to the multi-phase controller module via the PMBUS bus. The multi-phase controller module automatically adjusts the PWM signal of each phase to the drive circuit of the corresponding phase according to the adjustment parameters and the detected load current; the multi-phase drive circuit outputs the parallel signal of the corresponding phase, and then filters it through the output capacitor to obtain an output adjustment voltage with smaller ripple.

[0063] As the information interaction, execution process and other contents between the modules in the above-mentioned device are based on the same concept as the embodiment of the method of the present invention, the specific contents can be found in the description of the embodiment of the method of the present invention and will not be repeated here.

[0064] Likewise, the benefits of the device of the present invention are:

[0065] Aiming at the requirements of high current, low voltage, fast transient response and low power consumption in the field of image processing, a low-cost GPU multi-phase buck regulation method is designed. It uses a combination of a multi-phase controller and a multi-phase drive circuit. Compared with a single-phase buck regulator, it improves efficiency and thermal performance and improves the overshoot problem during load transients. The drive circuit design is simple and easy to transplant, which can meet the needs of different scenarios.

[0066] The above-described embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or changes made by those skilled in the art based on the present invention are within the protection scope of the present invention. The protection scope of the present invention shall be subject to the claims.

Claims

1. A GPU multi-phase voltage reduction regulation method, characterized in that include: Deploy a multi-phase buck circuit, which includes a multi-phase controller module, a multi-phase drive circuit and a GPU module. Each phase drive circuit in the multi-phase drive circuit is connected in parallel. Each phase drive circuit includes a driver, a power MOSFET module and a power inductor. The power MOSFET module includes a high-side MOS tube and a low-side MOSFET. The high-side MOS tube and the low-side MOS tube are respectively connected through the output end of the driver, and the drains of the high-side MOS tube and the low-side MOS tube are connected. A power inductor is connected at the drain connection. Each phase drive circuit outputs a signal through the power inductor. The multi-phase voltage of the GPU is regulated by a multi-phase step-down circuit: the adjustment parameters are set by the GPU, and the adjustment parameters are transmitted to the multi-phase controller module by using the PMBUS bus. The multi-phase controller module automatically adjusts the PWM signal of each phase to the drive circuit of the corresponding phase according to the adjustment parameters and the detected load current; the multi-phase drive circuit outputs the parallel signal of the corresponding phase, and then filters it through the output capacitor to obtain an output regulated voltage with a smaller ripple.

2. The GPU multi-phase voltage reduction regulation method according to claim 1, characterized in that the driver It includes a control logic module, a comparator HS and a comparator LS, receives a PWM signal through the control logic module, outputs a HS_ON signal and a LS_ON signal to the comparator HS and the comparator LS respectively according to the PWM signal, and outputs signals to the gates of the high-side MOS tube and the low-side MOS tube respectively through the comparator HS and the comparator LS.

3. The GPU multi-phase voltage reduction regulation method according to claim 1, characterized in that The multi-phase drive circuit input end is also connected to a multi-phase input capacitor Cin. The DC ripple is processed by the input capacitor Cin, and the electrolytic capacitor provides charge to meet the transient response of the load. The formula is: Combine multiple input capacitors Cinphase into input capacitor Cin, where Cinphase is the input capacitor of each phase and Iphasemax is the maximum current that each phase can output. Dadj=Vout / Vin*power conversion efficiency, ΔVin is the change in input voltage ripple, and Fsw is the switching frequency.

4. The GPU multi-phase voltage reduction regulation method according to claim 1, characterized in that The multi-phase voltage of the GPU is adjusted by the multi-phase step-down circuit, including: setting the current hysteresis value and the current threshold of each phase in the adjustment parameter by the GPU, and transmitting the current hysteresis value and the current threshold of each phase to the multi-phase controller module by using the PMBUS bus, The current threshold of each phase is added together through the multi-phase controller module to obtain the threshold of the corresponding phase number. According to the load current and the threshold of the phase number, it is determined which phases need to open the PWM channel, and the PWM signal is sent to the drive circuit of the corresponding phase according to the opened PWM channel.

5. The GPU multi-phase voltage reduction regulation method according to claim 4, characterized in that When the load current changes, the multi-phase controller module automatically increases or decreases the number of phases to control the opening of the PWM channel. When the load current increases to exceed the maximum value of the current phase number threshold and reaches the minimum value of the other phase number threshold after adding the current hysteresis value, it is increased to the corresponding phase number. When the load current decreases to below the minimum threshold value of the current phase number and reaches the maximum threshold value of other phase numbers after subtracting the current hysteresis value, it is reduced to the corresponding phase number.

6. A GPU multi-phase voltage reduction regulating device, characterized in that Including multi-phase buck circuit management module, The multi-phase buck circuit management module deploys a multi-phase buck circuit. The multi-phase buck circuit includes a multi-phase controller module, a multi-phase drive circuit and a GPU module. Each phase drive circuit in the multi-phase drive circuit is connected in parallel. Each phase drive circuit includes a driver, a power MOSFET module and a power inductor. The power MOSFET module includes a high-side MOS tube and a low-side MOSFET. The high-side MOS tube and the low-side MOS tube are respectively connected through the output end of the driver, and the drains of the high-side MOS tube and the low-side MOS tube are connected. The power inductor is connected at the drain connection. Each phase drive circuit outputs a signal through the power inductor. The multi-phase buck circuit management module adjusts the multi-phase voltage of the GPU through the multi-phase buck circuit: the adjustment parameters are set through the GPU, and the adjustment parameters are transmitted to the multi-phase controller module via the PMBUS bus. The multi-phase controller module automatically adjusts the PWM signal of each phase to the drive circuit of the corresponding phase according to the adjustment parameters and the detected load current; the multi-phase drive circuit outputs the parallel signal of the corresponding phase, and then filters it through the output capacitor to obtain an output adjustment voltage with smaller ripple.

7. The GPU multi-phase voltage reduction regulating device according to claim 6, characterized in that the driver It includes a control logic module, a comparator HS and a comparator LS, receives a PWM signal through the control logic module, outputs a HS_ON signal and a LS_ON signal to the comparator HS and the comparator LS respectively according to the PWM signal, and outputs signals to the gates of the high-side MOS tube and the low-side MOS tube respectively through the comparator HS and the comparator LS.

8. The GPU multi-phase voltage reduction regulating device according to claim 6, characterized in that The multi-phase drive circuit input end is also connected to a multi-phase input capacitor Cin. The DC ripple is processed by the input capacitor Cin, and the electrolytic capacitor provides charge to meet the transient response of the load. The formula is: Combine multiple input capacitors Cinphase into input capacitor Cin, where Cinphase is the input capacitor of each phase and Iphasemax is the maximum current that each phase can output. Dadj=Vout / Vin*power conversion efficiency, ΔVin is the change in input voltage ripple, and Fsw is the switching frequency.

9. The GPU multi-phase voltage reduction regulating device according to claim 6, characterized in that The multi-phase buck circuit management module adjusts the multi-phase voltage of the GPU through the multi-phase buck circuit, including: setting the current hysteresis value and the current threshold of each phase in the adjustment parameter through the GPU, and transmitting the current hysteresis value and the current threshold of each phase to the multi-phase controller module by using the PMBUS bus, The current threshold of each phase is added together through the multi-phase controller module to obtain the threshold of the corresponding phase number. According to the load current and the threshold of the phase number, it is determined which phases need to open the PWM channel, and the PWM signal is sent to the drive circuit of the corresponding phase according to the opened PWM channel.

10. The GPU multi-phase voltage reduction regulating device according to claim 9, characterized in that When the load current changes, the multi-phase buck circuit management module automatically increases or decreases the number of phases through the multi-phase controller module to control the opening of the PWM channel. When the load current increases to exceed the maximum value of the current phase number threshold and reaches the minimum value of the other phase number threshold after adding the current hysteresis value, the multi-phase controller module increases the corresponding phase number. When the load current decreases to a value lower than the minimum threshold value of the current phase number and reaches the maximum threshold value of other phase numbers after subtracting the current hysteresis value, the multi-phase controller module reduces the corresponding phase number.

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