Isolated smps, control method and storage medium

A method for controlling an isolated switched-mode power supply (SMPS), the isolated SMPS comprising:

• at least two primary side circuits each comprising a power switch;
• at least two secondary side circuits each comprising a synchronous rectifier;
• at least two transformers each comprising:
• a primary winding, which is connected in series with the power switch in a respective one of the primary side circuits and then between an input terminal of the isolated SMPS and a primary reference ground;
• and a secondary winding, which is connected in series with the synchronous rectifier in a respective one of the secondary side circuits and then between an output terminal of the isolated SMPS and a secondary reference ground,
• wherein the number of the at least two primary side circuits, the number of the at least two secondary side circuits and the number of the at least two transformers are equal to one another;
• and
• an isolated controller for carrying out the method to control the power switches in the primary side circuits,
• the method comprising:
• receiving an output voltage signal at the output terminal of the isolated SMPS and at least two winding voltage signals from the secondary windings in the at least two transformers;
• based on the output voltage signal and the at least two winding voltage signals, generating at least two pulse-width modulated (PWM) signals, wherein the number of the at least two PWM signals is equal to the number of the at least two primary side circuits, and the at least two PWM signals are staggered in phase;
• and
• transmitting the generated PWM signals to control terminals of the power switches in the respective at least two primary side circuits and thereby causing the power switches in the at least two primary side circuits to operate in a staggered manner.