Self-synchronized drive circuit for a synchronous

专利名称：Self-synchronized drive circuit for a

synchronous rectifier in a clamped- modepower converter

发明人：Wayne C. Bowman,Van A. Niemela申请号：US08/452560申请日：19950525公开号：US05590032A公开日：19961231

摘要：A power converter with a self synchronized synchronous rectifier includes oneor two drive windings to provide positive drive to the control electrodes of the

controlled switches (FETs) of a self synchronized synchronous rectifier. The polarities ofthese windings are selected so that the switched devices are driven appropriately torectify the periodic signal output of the secondary winding of the power transformer ofthe converter. In some arrangements one or two drive windings are included as extrawindings in the power transformer and connected to provide the proper polarity drivesignals. The turn ratios of the drive windings to the other windings are selected toprovide the proper gate drive signal levels. In an alternative arrangement a separatedrive transformer may be provided to supply the gate drive signals.

申请人：LUCENT TECHNOLOGIES INC.

代理人：Michael J. Urbano

更多信息请下载全文后查看