Patent ID: 7692937

Claim:
A resonant converter, comprising: an input terminal; an output terminal; a converting stage circuit electrically coupled to said input terminal to receive an energy from said input terminal; a diode-rectifying stage circuit electrically coupled to said converting stage circuit to rectify an output thereof; a filter and load stage circuit electrically coupled to said diode-rectifying stage circuit to generate an output on said output terminal; a logic circuit electrically coupled to said converting stage circuit to provide a logic signal; a driving circuit electrically coupled to said logic circuit to provide a driving signal in response to said logic signal; and an energy-recycling circuit electrically coupled to said converting stage circuit, said filter and load stage circuit and said driving circuit, for recycling said energy from said filter and load stage circuit to said input terminal in response to said driving signal when said filter and load stage circuit is operating at light load or no load condition.