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ByChoiForforwardconverterwithresetwindingBluecellistheinputparametersRedcellistheoutputparameters1.DefinespecificationsoftheSMPSMinimumLinevoltage(V_line.min)180V.rmsMaximumLinevoltage(V_line.max)265V.rmsLinefrequency(fL)60HzVoIoPoKL1stoutputforfeedback5V15A75W42%2ndoutput3.3V10A33W18%3rdoutput12V6A72W40%4thoutput0V0A0W0%Maximumoutputpower(Po)=180.0WEstimatedefficiency(Eff)70%Maximuminputpower(Pin)=257.1W2.DetermineDClinkcapacitorandtheDCvoltagerangeDClinkcapacitor235uFDClinkvoltageripple=29VMinimumDClinkvoltage=226VMaximumDClinkvoltage=375V3.Determinethemaximumdutyratio(Dmax)Maximumdutyratio0.4Turnsratio(Np/Nr)1MaximumnominalMOSFETvoltage=750V4.DeterminetheripplefactoroftheoutputinductorcurrentOutputInductorcurrentripplefactor0.15Maximumpeakdraincurrent=3.27ARMSdraincurrent=1.81ACurrentlimitofFPS4A5.DeterminepropercoreandminimumprimaryturnsfortransformerSwitchingfrequencyofFPS(kHz)67kHzMaximumfluxdensityswing0.32TEstimatedAPvalueofcore=9275mm4Crosssectionalareaofcore(Ae)86mm2FPSDesignAssistantver.1.00.67IoIoRFIIK2TsDTsMinimumprimaryturns=49.0T6.DeterminethenumnerofturnsforeachoutputsVoVF#ofturnsVcc(UseVccstartvoltage)15V1.2V3.6=4T1stoutputforfeedback5V0.4V3.0=3T2ndoutput3.3V0.4V2.1=2T3rdoutput12V1V7.2=7T4thoutput0V0V0.0=0TVF:ForwardvoltagedropofrectifierdiodeResetwinding=50TPrimaryturns=50T-enoughturnsALvalue(nogap)2490nH/T2Transformermagnetizinginductance=6.27499mH7.DeterminethewirediameterforeachtransformerwindingDiameterParallelIrms(A/mm2)Primarywinding(Np)0.68mm1T1.8AResetwinding(Nr)0.31mm1T0.1AVccwinding0.31mm1T0.1A1stoutputwinding0.68mm4T9.5A2ndoutputwinding0.68mm3T6.3A3rdoutputwinding0.68mm2T3.8A4thoutputwinding0mm0T0.0ACopperarea=33.9mm2Fillfactor0.25Requiredwindowarea135.7mm28.Determinepropercoreandnumberofturnsforinductor(coupledinductor)CrosssectionalareaofInductorcore(Ae)86mm2Saturationfluxdensity0.42TInductanceof1stoutput(L1)=5.7uHMinimumturnsofL1=6.5TActualnumberofturnsforL16=6TNumberofturnsforL2=4=4TNumberofturnsforL3=14=14TNumberofturnsforL4=0=0T9.DeterminethewirediameterforeachinductorwindingDiameterParallelIrms(A/mm2)WindingforL10.68mm5T15.1AWindingforL20.68mm3T10.0AWindingforL30.68mm2T6.0AWindingforL40mm0T0.0ACopperarea=25.4089mm2Fillfactor0.25Requiredwindowarea101.636mm210.Determinetherectifierdiodesinthesecondaryside8.3#DIV/0!9.28.35.85.2#DIV/0!5.01.01.36.6ReversevoltageRmsCurrentVccdiode55V0.1A1stoutputdiode22V9.5A2ndoutputdiode15V6.3A3rdoutputdiode52V3.8A4thoutputdiode0V0.0A11.DeterminetheoutputcapacitorESRCurrentVoltagerippleRipple1stoutputcapacitor4400uF20mΩ1.3V0.1V2ndoutputcapacitor4400uF20mΩ0.9V0.1V3rdoutputcapacitor2000uF60mΩ0.5V0.1V4thoutputcapacitor0uF0mΩ0.0V#DIV/0!V12.DesigntheResetCircuitResetdiodermscurrent0.1AMaximumvoltageofresetdiode749.5V13.DesignFeedbackcontrolloopControl-to-outputDCgain=3Control-to-outputzero=1,809HzControl-to-outputpole=261HzVoltagedividerresistor(R1)5㏀Voltagedividerresistor(R2)5㏀Optocouplerdioderesistor(RD)1㏀431Biasresistor(Rbias)1.2㏀Feebackpincapacitor(CB)=10nFFeedbackCapacitor(CF)=100nFFeedbackresistor(RF)=1㏀Feedbackintegratorgain(fi)=955HzFeedbackzero(fz)=265HzFeedbackpole(fp)=5308Hz169.80783364516#-86.721#259.78487324125#-84.886#409.7248283740#-81.857#639.58236243363#-77.32#1009.240372029100#-70.423#1608.468161725160#-60.627#2507.071741421250#-49.387#4004.772081317400#-37.847#6301.966521214630#-29.582#1000-0.985611101000#-25.5#1600-3.5451117.31600#-26.16#2500-5.2263105.12500#-31.25#CapacitancevoRDiDRbiasR1R2BibiasCBvFB1:1FPSvo'CFRF431-40-20020406010100100010000100000Gain(dB)Contorl-to-outputCompensatorT4000-6.21879.234000#-40.773#6300-6.67217.30.66300#-52.278#10000-6.87194.5-2#####-63.548#16000-6.95491.1-6#####-72.589#25000-6.9867-3-10#####-78.616#40000-7.0002-6-13#####-82.818#63000-7.0054-10-17#####-85.423#100000-7.0075-14-21#####-87.112#-120-90-60-30010100100010000100000Phase(degree)ByChoiForforwardconverterwithRCDresetBluecellistheinputparametersRedcellistheoutputparameters1.DefinespecificationsoftheSMPSMinimumLinevoltage(V_line.min)180V.rmsMaximumLinevoltage(V_line.max)265V.rmsLinefrequency(fL)60HzVoIoPoKL1stoutputforfeedback5V15A75W42%2ndoutput3.3V10A33W18%3rdoutput12V6A72W40%4thoutput0V0A0W0%Maximumoutputpower(Po)=180.0WEstimatedefficiency(Eff)70%Maximuminputpower(Pin)=257.1W2.DetermineDClinkcapacitorandtheDCvoltagerangeDClinkcapacitor235uFDClinkvoltageripple=29VMinimumDClinkvoltage=226VMaximumDClinkvoltage=375V3.Determinethemaximumdutyratio(Dmax)Maximumdutyratio0.4Nominalsnubbercapacitorvoltage300VVMaximumnominalMOSFETvoltage=675V4.DeterminetheripplefactoroftheoutputinductorcurrentOutputInductorcurrentripplefactor0.15Maximumpeakdraincurrent=3.27ARMSdraincurrent=1.81ACurrentlimitofFPS4A5.DeterminepropercoreandminimumprimaryturnsfortransformerSwitchingfrequencyofFPS(kHz)67kHzMaximumfluxdensityswing0.32TEstimatedAPvalueofcore=9275mm4Crosssectionalareaofcore(Ae)86mm2FPSDesignAssistantver.1.0150.60IoIoRFIIK2TsDTsMinimumprimaryturns=49.0T6.DeterminethenumnerofturnsforeachoutputsVoVF#ofturnsVcc(UseVccstartvoltage)15V1.2V2.71=3