Power conversion system and method thereof

A power conversion system, comprising:

• a power conversion circuit, comprising a plurality of power circuits connected in series, each of the power circuits comprising a plurality of power switches;
• a current detection circuit, coupled to the power conversion circuit, and detecting an output current signal of the power conversion circuit;
• a current adjustment circuit, coupled to the current detection circuit, and generating a current adjustment signal according to the output current signal;
• a control circuit, coupled to the current adjustment circuit, and generating a plurality of control signals according to the current adjustment signal;
• and
• a plurality of signal generation circuits, wherein each of the signal generation circuits is coupled between the control circuit and one of the power circuits to output a burst signal group to a corresponding power circuit according to one of the control signals to control the power switches of the corresponding power circuit, and the burst signal group comprises a plurality of burst signals;
• each of the burst signals comprises a plurality of burst intervals, and there is a burst spacing between two adjacent ones of the burst intervals;
• and each of the power circuits operates in a working mode in each of the burst intervals and operates in a rest mode in each of the burst spacings.