Drive circuits for synchronous rectifiers

专利名称：Drive circuits for synchronous rectifiers发明人：ISAAC COHEN申请号：AU7876000申请日：20001006公开号：AU7876000A公开日：20010423

摘要：A power conversion apparatus, e.g., a DC-to-DC converter, includes a

transformer having primary and secondary windings. A first switching circuit has an inputport configured to be coupled across a DC power source and an output port coupled tothe primary winding of the transformer. A switch control circuit is operatively associatedwith the switching circuit and causes the switching circuit to alternately apply first andsecond polarity voltages to the primary winding. A second switching circuit is operative totransfer energy to a load from the secondary winding via a first capacitor responsive toapplication of the first polarity voltage to the primary winding and to transfer energy tothe load from the secondary winding via a second capacitor responsive to application ofthe second polarity voltage to the primary winding. The first switching circuit may beoperated such that switches therein may be operated under reduced current and/orreduced voltage conditions. Related power conversion methods are also discussed.

申请人：LAMBDA ELECTRONICS

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