反激电源变压器的参数设计

,RCDRCDCRbuck-boostMOSD1ABMOSMOSRCDCRPNPNRC.MHzFastRecoveryDiodePNVFtrrRMS:CCM:DCM:CRM:DCMCCM0MOSDCMCCMCCMDCMCRMDCMDCMMOSMOSQR:MOSMOSMOSQRPWMCRMQRICVf:VinDmax=Vf(1-Dmax)Dmax=Vf/(Vin+Vf)VfDmaxVfMOSVin+VfVfVinMOSMOS10%20%MOS600V800V85V~265VAC100VDC370VDC600VMOS20%480V370VVf480-370=110VDmax=Vf/(Vinmin+Vf)=110/(100+110)=0.52650VMOS520VVf520-370=150VDmax=Vf/(Vinmin+Vf)=150/(100+150)=0.6700VMOS560VVf560-370=190VDmax=Vf/(Vinmin+Vf)=190/(100+190)=0.66800VMOS640VVf640-370=270VDmax=Vf/(Vinmin+Vf)=270/(100+270)=0.73MOS0.5DCM85VAC0.6110VAC0.46CCM50%50%MOSMOS600VMOSMOSLpVfVinminIavg=(Ip1+Ip2)Tonmax/(2T)=(Ip1+Ip2)Dmax/2PoutPout/=VinminIavg=Vinmin(Ip1+Ip2)Dmax/2Ip1+Ip2=2Pout/(Vinminmax)DCMIp1=0CCMIp1Ip2Ip2=23Ip1Ip2Ip1Ip2Ip1(Vinmin/Lp)Tonmax=Ip2-Ip1Lp=(VinminDmax)/(fs(Ip2-Ip1))fsAPLHIpATK00.20.4K00.3APLHIpATAecm2Vf0.8V1.0VNs=(Vout+VD)Np/VfVoutVD0.8V1.0VVDR=VinmaxNs/Np+VoutCCMRMSRMS5AfHzlitzRCCMOSMOSVin+VfVfMOSVin+VcVcRCDDCVcMOSVin+VcD(Vc-Vf)t/Llk=Iptt=IpLlk/(Vc-Vf)IpRCDVcIpt/2RCDP=fsVcIpt/2tVcRCDVcRCDVc=22.5VfVcMOSMOSVcMOSVfVfVcMOSMOSVc+VinmaxMOS90%VcVfPVcP=Vc2/RRVcVcVcRCDVc5%10%5%MOSVc0.1uFC=1/F,10MHz0.1uF100MHz0.01uF1.u=85~265Vk=2~3uF/Wu=230Vk=1uF/W2.a1.2~1.52b1000uF/Ac0.01~0.1uFd