Active output compensation circuit

An active output compensation circuit for a power supply which is connected to a power source to receive input power and regulate to become a plurality of different output power and also includes a transformer to receive the input power and generate inductive power, a switch circuit to regulate the period of the inductive power and a plurality of output regulation units electrically connected to the transformer to regulate the inductive power to the output power, comprising:

• a voltage difference judgment unit which is electrically connected to the output regulation units and has at least one comparison circuit to compare voltage difference of the output power of two output regulation units to determine whether to output an ON signal;
• and
• a plurality of compensation channel switches electrically bridging the two output regulation units and the voltage difference judgment unit, wherein the compensation channel switches electrically connects to the output power of two output regulation units, and the compensation channel switches are driven by the ON signal and set ON to allow one output power to compensate another output power.