Multi-phase switched-mode power supplies

A multi-phase switched-mode power supply, the power supply comprising:

• a pair of input terminals for receiving an alternating current (AC) or direct current (DC) voltage input from an input power source;
• a pair of output terminals for supplying a direct current (DC) voltage output to a load;
• a first phase circuit coupled between the pair of input terminals and the pair of output terminals, the first phase circuit including a first inductor coupled with a first switch;
• a second phase circuit interleaved with the first phase circuit between the pair of input terminals and the pair of output terminals, the second phase circuit including a second inductor coupled with a second switch;
• and
• a control circuit configured to:
• output a first PWM signal to the first switch;
• output a second PWM signal to the second switch, wherein an on time of the second PWM signal is equal to an on time of the first PWM signal plus a fixed offset time period;
• determine a period between at least two rising edges of the first PWM signal;
• determine an off trigger PWM signal according to the determined period;
• and
• change the second PWM signal to a logical low value when a falling edge of the off trigger PWM signal occurs while the second PWM signal has a logical high value.