反激变压器讲义--非常实用


































 

 

















 






















EMI.RCRCDRCDAbstract:TheapplicationofRCDcircuitinconvertercanrealizelowcostandlowpartscout.Howtodesignthatcircuitisintroduced.Keyword:RCDclamp,Flybackconverter(100w)RCDRCDRCDRCDRCDVclamp:Vin:VD:Lp:Llk:RCDLpLlkLp,LlkRCDLlkRCDLlkRcRCDRCDRcCcCcVclampRCDVclamp2RCDVORVclampCcVBR(DSS)VINMAXVclampVBR(DSS)0.9VclampLlk1%--5%RcCcVclampPR-clampWR-clampWlVORVclamp(3)fsLlkIds-peak()(2)(4)CcCc5%--10%,CcCcVclampVclampRcfs1/3RCDRCf300MEMC150KHz-30MHz300M()EMC40MHz1.200K20M2.200K3.20M4.PCB100M500mv1.PCB2.,ACTRACE,,.,(),(),.022X10YX,,“”CMG“”50W,3PININLET(FGDC),2PININLET,LISN1YY22-3YDXGJB151ACE101sometimes:35253842cmg::ADVANTAGES:FasttransientresponseSinglepolecompensationInherentcurrentlimitingDISADVANTAGES:NoisesensitivitytocurrentspikesDualfeedbackloopsSlopecompensationCurrentlimittail:ADVANTAGES:SinglefeedbackloopGoodnoiseimmunityLowimpedanceoutputRDS(ON)highlyaccurateDISADVANTAGES:DoublepolecompensationSlowdynamicresponseOutputcapsaffectcompensationPWMESR1m1iLm2iLm1=Vs/Tm2=VoR/LMN(1.1)1
0.5
0.522.a
0.5iiLi,.2.b,
0.5iiLi,

0.5im1,

0.5iVs(Ton)VcVcVsVcVsVcVc3-mVciL=-i(m+m2)/(m+m1)(1.2)

1m10,iLTL,(1.2)mm-0.5m2(1.3)m0.75,Vom2(1.3),35%1/n1/21/31/21/2,3844MOSFET3RC3844Y-CAP,EMIEMI