Control circuit and control method for multiphase power supply and multiphase power supply

A control circuit for a multiphase power supply which comprises N-phase power conversion circuits, N is a predetermined phase number of the multiphase power supply, and N is an integer greater than or equal to 1, comprising:

• a current reference signal generator configured to adjust a first compensation signal according to a first scaling factor and a first voltage signal, so that the first compensation signal follows the first voltage signal in a steady state, and a current reference signal is obtained according to the first compensation signal and the first voltage signal;
• a controller configured to obtain a control signal for each phase power conversion circuit according to the current reference signal to control each phase power conversion circuit to provide a power output to a load,
• wherein the first compensation signal represents a difference information between an output feedback signal of the multiphase power supply and a preset reference voltage, the first scaling factor represents information about a ratio of the predetermined phase number of the power conversion circuits and a phase number of the power conversion circuits that are turned on in the multiphase power supply, and the first voltage signal represents information about an average value of a total current of the multiphase power supply relative to the predetermined phase number of the power conversion circuits,
• the current reference signal generator comprises:
• a voltage converter for receiving the first compensation signal, wherein the voltage converter is configured to perform voltage conversion on the first compensation signal according to the first scaling factor to obtain a first node signal;
• a voltage regulation unit connected with an output of the voltage converter, wherein the voltage regulation unit is configured to obtain a voltage regulation signal according to the first compensation signal and the first voltage signal,
• wherein the current reference signal is obtained by superimposing the voltage regulation signal with the first node signal.