Power conversion system having spread spectrum and phase shifting mechanisms

A power conversion system having spread spectrum and phase shifting mechanisms, comprising:

• a plurality of power converters arranged in a predetermined order, wherein each of the plurality of power converters includes:
• a spread spectrum instructing circuit configured to output a spread spectrum instruction parameter;
• a synchronization signal detecting circuit configured to output a synchronization detected signal;
• an oscillator circuit connected to the spread spectrum instructing circuit and the synchronization signal detecting circuit, and configured to output an oscillation signal according to the spread spectrum instruction parameter or a clock signal instructed by the synchronization detected signal;
• and
• a phase shifting circuit connected to the oscillator circuit, and configured to shift phases of a plurality of waveforms of the oscillation signal to generate the clock signal;
• wherein the phase shifting circuit of each of the plurality of power converters except for a last one of the plurality of power converters outputs the clock signal to the synchronization signal detecting circuit of a next one of the plurality of power converters;
• wherein the synchronization signal detecting circuit of each of the power converters detects the clock signal to output the synchronization detected signal.