Patent ID: 8258767

Claim:
A power conversion system for reducing cross regulation effect comprises: a switching circuit electrically connected to an inductor for controlling the inductor charged and discharged therefore providing a plurality of output voltages; a current detector electrically connected to the inductor for detecting an inductor current passing through the inductor and sensing an inductor voltage across the inductor; a plurality of error amplifiers electrically connected to the switching circuit for receiving an feed back each of the plurality of output voltages therefore generating an error signal of each the output voltage; a voltage feedback adjustment circuit electrically connected to the plurality of error amplifiers for receiving and modulating the error signal of each the output voltage therefore generating a plurality of error modulating signals; a peak generator electrically connected to the voltage feedback adjustment circuit for receiving the plurality of error modulating signals therefore generating a peak voltage; a comparator unit electrically connected to the voltage feedback adjustment circuit, the peak generator and the current detector for receiving the plurality of error modulating signals, the peak voltage and the inductor voltage, and respectively comparing the inductor voltage with the error modulating signal and the peak voltage to generate a plurality of voltage signals; and a control circuit electrically connected to the comparator unit for receiving the plurality of voltage signals and generating a plurality of control signals to control the switching circuit.