Original document(11 pages) Authorized document(11 pages) 中文版
    A flyback converter (100) has a primary side (112) comprising a main switch (Q1) and a control device (116) and a delay circuit (110). The converter has a secondary side (114) comprising a drive circuit controlling a rectifying switch (Q4). The drive circuit comprises a first part including a first transistor (Q2), a first discharge diode (D2) and an on-node (D_ON) and a second part including a second transistor (Q3), a second discharge diode (D3) and an off-node (D_OFF). The control device is connected to the drive circuit via at least one drive capacitor (C1, C2) to the on- and off-nodes. The drive circuit has a first mode of operation in a flyback phase and a second mode of operation is a forward phase. The flyback converter comprises few components and the main switch is efficiently prevented from conducting simultaneously with the rectifying switch.
Application Number
申请号		 01806369 Application Date
申请日		 2001.03.12
Title 名称 Synchronous rectification in flyback converter
Publication Number
公开号		 1416611 Publication Date
公开日		 2003.05.07
Approval Pub. Date 2005.12.07 Granted Pub. Date 2005.12.07
International Classification 分类号 H02M1/08;H02M3/335
Applicant(s) Name
申请人		 Telefonaktiebolaget LM Ericsson CpubD
Address 地址
Inventor(s) Name 发明人 B. Hedenskog;A. Svensson
Attorney & Agent 代理人 wang yue zhang zhicheng

  
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