同步整流器在正激变换器资料讲解.ppt

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1、同步整流器在正激变换器(C)2004 SYNC POWER CORP.ALL Rights Reserved.9F-5,No.3-2,Park Street,Nankang District,(NKSP),Taipei,Taiwan,115,R.O.C.Tel:886-2-2655-8178 Fax:886-2-2655-8468A.Rectifier CircuitB.Rectifier ConceptC.Synchronous Rectifier C-1:RCD Clamp&Self-Driven SRs C-2:Active Clamp&Self-Driven SRs C-3:Contr

2、ol DrivenD.Power Loss ComparisonsE.Efficiency Curve2(C)2004 SYNC POWER CORP.ALL Rights Reserved.9F-5,No.3-2,Park Street,Nankang District,(NKSP),Taipei,Taiwan,115,R.O.C.Tel:886-2-2655-8178 Fax:886-2-2655-8468(C)2004 SYNC POWER CORP.ALL Rights Reserved.9F-5,No.3-2,Park Street,Nankang District,(NKSP),T

3、aipei,Taiwan,115,R.O.C.Tel:886-2-2655-8178 Fax:886-2-2655-8468(C)2004 SYNC POWER CORP.ALL Rights Reserved.9F-5,No.3-2,Park Street,Nankang District,(NKSP),Taipei,Taiwan,115,R.O.C.Tel:886-2-2655-8178 Fax:886-2-2655-8468(C)2004 SYNC POWER CORP.ALL Rights Reserved.9F-5,No.3-2,Park Street,Nankang Distric

4、t,(NKSP),Taipei,Taiwan,115,R.O.C.Tel:886-2-2655-8178 Fax:886-2-2655-8468C.Synchronous RectifierC-2 Active Clamp&Self Driven SRs(a)Gate Driver signal(b)Drain to Source voltage of primary switch(c)Secondary winding voltage(d)Current through SR2(e)Current through SR36(C)2004 SYNC POWER CORP.ALL Rights

5、Reserved.9F-5,No.3-2,Park Street,Nankang District,(NKSP),Taipei,Taiwan,115,R.O.C.Tel:886-2-2655-8178 Fax:886-2-2655-8468(a)Gate Driver signal(b)Drain to Source voltage of primary switch(c)Secondary winding voltage(d)Current through SR2(e)Current through SR3C.Synchronous RectifierC-3 Control Driven S

6、Rs7(C)2004 SYNC POWER CORP.ALL Rights Reserved.9F-5,No.3-2,Park Street,Nankang District,(NKSP),Taipei,Taiwan,115,R.O.C.Tel:886-2-2655-8178 Fax:886-2-2655-8468D.Power Loss ComparisonsConverter efficiencyConverter Efficiency(For Schottky Rectifiers)Converter Efficiency(For Synchronous Rectifiers)PO :O

7、utput Power Ploss:Total Loss;PSH :Schottky Rectifiers Loss PSR :Synchronous Rectifiers Loss8(C)2004 SYNC POWER CORP.ALL Rights Reserved.9F-5,No.3-2,Park Street,Nankang District,(NKSP),Taipei,Taiwan,115,R.O.C.Tel:886-2-2655-8178 Fax:886-2-2655-8468D.Power Loss ComparisonsSchottky Power LossSelf Drive

8、ns SR LossControl Drivens SR Loss9(C)2004 SYNC POWER CORP.ALL Rights Reserved.9F-5,No.3-2,Park Street,Nankang District,(NKSP),Taipei,Taiwan,115,R.O.C.Tel:886-2-2655-8178 Fax:886-2-2655-8468D.Power Loss ComparisonsVD=VSH=Body Diode Voltage;Ddead =dead time duty cycle;Ddelay =delay time duty cycleEffi

9、ciency(Active Self Driven SRs)Efficiency(RCD Self Driven SRs)Efficiency(Control Driven SRs)10(C)2004 SYNC POWER CORP.ALL Rights Reserved.9F-5,No.3-2,Park Street,Nankang District,(NKSP),Taipei,Taiwan,115,R.O.C.Tel:886-2-2655-8178 Fax:886-2-2655-8468E.Efficiency CurveDdelay 011(C)2004 SYNC POWER CORP.ALL Rights Reserved.9F-5,No.3-2,Park Street,Nankang District,(NKSP),Taipei,Taiwan,115,R.O.C.Tel:886-2-2655-8178 Fax:886-2-2655-8468E.Efficiency CurveDdead 0.212