REGENERATION SYNCHRONOUS RECTIFICATION CIRCUIT,申请号JP20070149899-传众专利搜索

REGENERATION SYNCHRONOUS RECTIFICATION CIRCUIT

申请公布号：JP2008306804(A)

申请号：JP20070149899

申请日期：2007.06.06

申请公布日期：2008.12.18

申请人：

TECH NO HIRABAYASHI:KK

发明人：HIRABAYASHI AKEMICHI

分类号：H02M7/21;H02M3/28

主分类号：H02M7/21

摘要：PROBLEM TO BE SOLVED: To provide a switching power supply device which achieves the drive of a synchronous rectification circuit and the constant voltage control of an output in a fly-back converter with fewer parts, and also achieves high efficiency. SOLUTION: An error amplifier, which is connected to an output terminal conventionally, can both drive a synchronous rectification element and perform the constant voltage control of an output by being connected between the secondary winding (N2) of a transformer and the synchronous rectification element (Q1). auxiliary winding and the like is conventionally required to drive the synchronous rectification element, but it is not required by the use of a negative voltage of the secondary winding of the transformer and a voltage of an output. The increase of the windings of the transformer for driving the synchronous rectification element is prevented thereby. COPYRIGHT: (C)2009,JPO&INPIT