SHUNT CIRCUIT FOR REDUCING AUDIBLE NOISE AT LOW LOADING CONDITIONS OF A POWER SUPPLY EMPLOYING A HIGH FREQUENCY RESONANT CONVERTER

摘要

A power supply including a resonant converter is provided with current shunt. The current shunt automatically shunts a portion of current flowing in the resonant converter at light loading of the power supply such that output current flowing in an output circuit connected to the power supply would be reduced toward zero as the operating frequency of the converter moves to a predetermined frequency.