Patent ID: 6765810
Filing Date: 2004-07-20
Classification: H02M,Y02B

Abstract:
A DC-DC power converter comprising:first and second transformers, wherein each of the first and second transformers includes a primary winding and a secondary winding; a double-ended input circuit including at least two primary switches, wherein the double-ended input circuit is for generating an alternating voltage across the primary windings of the first and second transformers; a control circuit for controlling the at least two primary switches such that the at least two primary switches are simultaneously OFF for a first time period during a switching cycle of the converter; a first synchronous rectifier coupled to the secondary winding of the first transformer; and a second synchronous rectifier coupled to the secondary winding of the second transformer, wherein the control circuit is for controlling the first and second synchronous rectifiers such that the first and second synchronous rectifiers are simultaneously ON for a second time period during the switching cycle.