MTBF计算公式

CUSTOMERMODEL:DATE:MODELNO:DESIGNNO.:TestCondition:λpQTYSUM0.564510.5651.5A/600V0.761910.76210.0A/100V0.587610.58833uf/400V100℃0.725710.7260.22uf/275V105℃0.196710.197680uf/16V105℃2.272024.544100uf/16V105℃0.669410.6694.0A/600V1.203011.2030.011410.011FRDIODE:D2FR1021.0A/200V0.587610.588FRDIODE:D11N40071.0A/1,000V0.587610.588Total10.44MTBF=/=INPUT:90VAC60HzINPUT:264VOUTPUT:12.0VDC1500mAC1,C2(V)368V(1)ROOM：26.8℃TRS.Fosc60KHz(2)X'FRM:T167.2℃(3)FRDIODE:D170.5℃Spec.Vcev600V(4)DE：D463.6℃(5)X-CAP：CX161.4℃(6)E/CAP:C7,C858.3℃(7)E/CAP：C165.2℃(8)Bri/De：BD173.4℃(9)MOSFET:Q163.3℃(10)LineFilter:L167.9℃(11)E/CAP：C952.0℃DESCRIPTIONPOWERTRANSFORMER:T1BRIDGEDIODE:BD1DB155SCHOTTKYDIODE:D4SB10A100ELECTROLYTICCAPACITOR:C1ELECTROLYTICCAPACITOR:CX1ELECTROLYTICCAPACITOR:C7,C895,791HR90V1,000,00010.439ELECTROLYTICCAPACITOR:C9MOSFET:Q14N60ELINEFILTER:L1Totalfailureratepermillionhours600VMTBF(at25℃ambient)(CalcuatedperMIL-HDBK-217F)INPUT=90Vac50Hz117V60KHzλb=0.00314πQ=30πE=6λb=0.069πT=3.285361πS=0.054(見表1)VS=0.12πC=1.0πQ=8.0πE=6.0表1πSπS0.0540.4200.1100.5800.1900.7700.2901.000λb=0.113753λb=0.048069πCV=0.63799πQ=10.0πE=1.00λb=0.00071πK=1.0(D51,D53)PowerRectifier,FastRecoveryλp=λb*πT*πS*πC*πQ*πE=0.587580330.3VS≦0.40.7VS≦0.80.4VS≦0.50.8VS≦0.9AllOthersAllOthersVS≦3.00.6VS≦0.70.5VS≦0.60.9VS≦1.0(C2)CAPACITORS,FIXED.ELECTROLYTIC,ALUMINUMT=85℃λp=λb*πCV*πQ*πE=0.72573059S=工作電壓／額定電壓=0.29250000CONNECTORS,PRINTEDCIRCUITBOARDλp=λb*πK*πP*πE=0.01144784T=105℃(T1)TRANSFORMERSλp=λb*πQ*πE=0.56454290????????????????+-=2981*27313091expJTRatedVoltageAppoiedVoltageRatioStressVoltageVS*=7.8364273exp0018.0??????+=HSbTl??????+?????+=5335827309.5exp15.000254.0TSbl???????+????+???=5337827309.5exp15.000254.0TSbl()18.034.0CCV=p51064.0101exp???-=NppπP=2.3πE=7.0N=NumberofActivePins51064.0101exp???-=Nppλb=0.003168πQ=30πE=6λb=0.069πT=4.26001661πS=0.054(見表1)VS=0.15πC=1.0πQ=8.0πE=6.0表1πSπS0.0540.4200.1100.5800.1900.7700.2901.000λb=0.18903469λb=0.07597903πCV=0.2588898πQ=10.0πE=1.00λb=0.035381785VS=#VALUE!λp=λb*πT*πS*πC*πQ*πE=0.76189545AllOthersAllOthers0.4VS≦0.50.8VS≦0.9VS≦3.00.6VS≦0.70.3VS≦0.4(BD1)PowerRectifier,FastRecovery0.9VS≦1.00.7VS≦0.80.19670198(C1)CAPACITORS,FIXED.ELECTROLYTIC,ALUMINUM0.5VS≦0.6T=85℃λp=λb*πCV*πQ*πE=S=工作電壓／額定電壓=0.42545455TRANSISTORS,HIGHPOWER,HIGHFREQUENCY,BIPOLARλp=λb*πT*πA*πM*πQ*πE=1.202980694T=105℃(NF2)TRANSFORMERSλp=λb*πQ*πE=0.57022759??????+?????+=5335827309.5exp15.000254.0TSbl???????+????+???=5337827309.5exp15.000254.0TSbl()18.034.0CCV=p))(00558.0)(354.0exp(032.0PFb+=l????????????????+-=2981*27313091expJTRatedVoltageAppoiedVoltageRatioStressVoltageVS*=7.8364273exp0018.0??????+=HSbTl0.09771#######πA=3.4πM=2.0πQ=5.0πE=1.0VS=0.4πT=πT=0.4VS=0.553000Hr計算式1.5146712000Hr計算式λb=0.5146505λb=0.20657561πCV=1.0998426πQ=10.00πE=1.00λp=λb*πCV*πQ*πE=2.27200651T=85℃(C51,C55)CAPACITORS,FIXED.ELECTROLYTIC,ALUMINUMλp=(λb*πCV*πQ*Πe)/(2000/w63)=S=工作電壓／額定電壓=0.75000000T=105℃??????+?????+=5335827309.5exp15.000254.0TSbl???????+????+???=5337827309.5exp15.000254.0TSbl()18.034.0CCV=pλb=0.162799798λb=0.0859381πCV=0.7788950πQ=10.00πE=1.00λp=λb*πCV*πQ*πE=0.66936768T=105℃T=85℃(C52)CAPACITORS,FIXED.ELECTROLYTIC,ALUMINUMS=工作電壓／額定電壓=0.75000000??????+?????+=5335827309.5exp15.000254.0TSbl???????+????+???=5337827309.5exp15.000254.0TSbl()18.034.0CCV=pCUSTOMERMODEL:DATE:MODELNO:JSE-0252-9DESIGNNO.:TestCondition:λpQTYSUM0.573510.5741.5A/600V0.5440210.54410.0A/100V0.603810.60433uf/400V105℃1.798611.7990.22uf/275V100℃4.777014.777680uf/16V105℃1.706623.413100uf/16V105℃0.678110.6784.0A/600V1.203011.2030.010110.010FRDIODE:D2FR1021.0A/200V0.603810.604FRDIODE:D11N40071.0A/1,000V0.603810.604Total14.81MTBF=/=INPUT:264VAC50HzINPUT:264VOUTPUT:12.0VDC1500mAC1,C2(V)368V(1)ROOM：26.7℃TRS.Fosc60KHz(2)X'FRM:T168.3℃mosfetVds(3)FRDIODE:D171.6℃Spec.Vcev600V(4)DE：D464.6℃(5)X-CAP：CX160.7℃(6)E/CAP:C7,C859.2℃(7)E/CAP：C157.5℃(8)Bri/De：BD160.8℃(9)MOSFET:Q162.6℃(10)LineFilter:L157.2℃(11)E/CAP：C952.4℃INPUT=264V50HzDESCRIPTIONPOWERTRANSFORMER:T1BRIDGEDIODE:BD1DB155ELECTROLYTICCAPACITOR:C9MOSFET:Q14N60ELINEFILTER:L1TotalfailureratepermillionhoursSCHOTTKYDIODE:D4SB10A100ELECTROLYTICCAPACITOR:C1ELECTROLYTICCAPACITOR:CX1ELECTROLYTICCAPACITOR:C7,C8117V60KHz600V1,000,00014.80967,526HR90VMTBF(at25℃ambient)(CalcuatedperMIL-HDBK-217F)λb=########πQ=30πE=6λb=0.069πT=3.375953πS=0.054(見表1)VS=0.12πC=1.0πQ=8.0πE=6.0表1πSπS0.0540.4200.1100.5800.1900.7700.2901.000λb=0.661208λb=0.281925πCV=0.63799πQ=10.0πE=1.00TRANSFORMERSAllOthersAllOthersVS≦3.00.6VS≦0.7λp=λb*πQ*πE=0.57354268(D51,D53)PowerRectifier,FastRecoveryλp=λb*πT*πS*πC*πQ*πE=0.603782370.9VS≦1.0(C2)CAPACITORS,FIXED.ELECTROLYTIC,ALUMINUM0.3VS≦0.40.7VS≦0.80.4VS≦0.50.8VS≦0.9λp=λb*πCV*πQ*πE=1.79864354T=105℃T=85℃CONNECTORS,PRINTEDCIRCUITBOARDλp=λb*πK*πP*πE=0.010134826S=工作電壓／額定電壓=0.920740000.5VS≦0.6????????????????+-=2981*27313091expJTRatedVoltageAppoiedVoltageRatioStressVoltageVS*=7.8364273exp0018.0??????+=HSbTl??????+?????+=5335827309.5exp15.000254.0TSbl???????+????+???=5337827309.5exp15.000254.0TSbl()18.034.0CCV=pλb=0.00063πK=1.0πP=2.3πE=7.0N=NumberofActiveP