反激式开关电源设计资料要点

UC3842UC3845OB2262OB2269TOPSWITCHUC3842D1ETONTOFFLPLSTIPQ1CORL1Q1Q1VINNPD1Q1NPVlineminVlinemaxfLVOIOP0EffEff0.8~0.851-1OINffPPE1-1CDCDCDCmaxmin(1)22INchDClineLDCPDVVfC1-21-2Dch0.285~265VrmsmaxVDCmin2Vline10~15%100/115VAC85~265VAC2~3uF230VAC1uF11-1DCDmaxROMAXROMINVDVV1-3VRO135V2CCMDCMHmin2max()2DCminsRFVDLPfK1-4fsKRF3DCMKRF=1CCMKRF1KRF0.3~0.52peakdsEDCIII1-522peakmaxdsEDCID=3I+23I1-6minmaxinEDCDCPIVD1-7minmaxDCmsVDILf1-81-2MOSFETKRFAp6102TPeWSmmCPAAAfBKK1-91-9eAcm2WAcm2TPWBmGs2000Gs2~3A/mm0.8~0.9mK0.2~0.4CKCK=1.0PAeWAA31-3Aminmax2inPDCPIVD1-10(cm)2820.410ppgeLIlAB1-11HrB4810pppeLINAB1-12pLHpIAeAcm2BGsmax(min)max()(1)ODpsinVVDNNVD1-13DV1Vcm256.61f1-14RCD1-41-52122peaksSNSNSNslkpeaksSNoitVPVfLifVnV1-15snPlkLonV=ROVpeakisf2212SNSNSNlkpeaksSNoVRVLifVnV1-16SNSNSNSNsVVCRf1-17SNVSNV5~10%snRsnCMOSFET6PC817TL431R12R13R14R15C9TL431C20VoVfk1-6PC817TL431TL4311mAPC8171VTL431R131K1-7PC8175mAIc1~7mA3V5mACTR100%fI=3mAoV=5V1212.5ofVVVIRTL4312.5V12R=500TL431oV=2.51+1415RRoV=5V14R=15RC9C20100nFCOMP1VFB23ENSE4RT/CTREFVCCOUTPUTGND8765F10.47T1D4300V220VPGR1R2R3R4R5R6R7R8R9R10R11R12R13R14R15R16C1C2C3C4C5C6C7C8C9C10C11C12C13C14DIODEDIODEL1D1D2OVPC817TL4312-1C11T1MOSFETT1C1C6C7UC3842R6C212mAR685V8R4C54R4C5:1.8TTfRCHz3R111VR3C412RCfRCRCf3~62-2UC3842122R710.7V2-3UC38426MOSFETR8R9MOSFET22~3PNC10C12C13L1ESRL13.3~200uHR161-1972222OONOLpVEtPRLT1-182LOONPRVEtLT1-19VlineminVlinemaxAC160~240VfL50HzDC5V2AOP=10WEff0.8INP=12.5W13WSf=50KHzDCMETD28/34eA=0.78CM2WA=1.41CM2PA=1.1CM4PA135VROMAXROMINVDVV1351351601.4MAXD=0.376min2max()2DCminsRFVDLPfK2(1601.40.376)213501mVLWKHz=5.46mHminmax2inPDCPIVD2132240.376PWIV=0.31A810pppeLINAB3825.46100.31100.782000pHANCMGs=1085Vmax(min)max()(1)ODpsinVVDNNVD(51)(10.376)1082240.376sN=4.8515V13.3135V15VMOSFET800V1AMOSFETMOSFET1-20SNV=0.9()BRDSSV-maxINV1-200.98002401.4SNV=384V2212SNSNSNlkpeaksSNoVRVLifVnVSNSNSNSNsVVCRf5%lkL=273uH2623841384109.2100.31502384135SNRKHz146k38438.414650SNCkkHz=1.36nF2maxINV1237456