反激式开关电源变压器设计―Fairchild 资料

ByChoiBluecellistheinputparametersRedcellistheoutputparameters1.DefinespecificationsoftheSMPSMinimumLinevoltage(V_line.min)90V.rmsMaximumLinevoltage(V_line.max)265V.rmsLinefrequency(fL)50HzVoIoPoKL1stoutputforfeedback18V2A36W100%2ndoutput0V0A0W0%3rdoutputVA0W0%4thoutputVA0W0%5thoutputVA0W0%6thoutputVA0W0%Maximumoutputpower(Po)=36.0WEstimatedefficiency(Eff)80%Maximuminputpower(Pin)=45.0W2.CalculatetheminimuminputvoltageDClinkcapacitor100uFDClinkvoltageripple=28VMinimumDClinkvoltage=99VMaximumDClinkvoltage=375V3.DetermineMaximumdutyratio(Dmax)Maximumdutyratio0.45MaximumnominalMOSFETvoltage=456VOutputvoltagereflectedtoprimary=81V4.Determinetransformerprimaryinductance(Lm)SwitchingfrequencyofFPS(kHz)65kHzRipplefactor0.4Primarysideinductance(Lm)=848uHMaximumpeakdraincurrent=1.41ARMSdraincurrent0.70A##MaximumDClinkvoltageinCCM129V5.DeterminepropercoreandminimumprimaryturnsCurrentlimitofFPS2.00AMaximumfluxdensityswing0.30TSaturationfluxdensity(Bsat)0.25TEstimatedAPvalueofcore=2612mm4Crosssectionalareaofcore(Ae)82mm2Minimumprimaryturns=82.7T6.DeterminethenumnerofturnsforeachoutputsVoVF#ofturnsFPSDesignAssistantver.1.0IEDCIEDCRFIIK2)(1)(1CCMKDCMKRFRFVcc(UseVccstartvoltage)15V1V3.4595=3T1stoutputforfeedback18V0.5V4=4T2ndoutput0V1.2V0.2595=0T3rdoutput0V0V0=0T4thoutput0V0V0=0T5thoutput0V0V0=0T6thoutput0V0V0=0TVF:ForwardvoltagedropofrectifierdiodePrimaryturns=18T-Moreturnsrequired!!!ALvalue(nogap)2800nH/T2Gaplength(centerpolegap)=0.00046mm7.DetermineproperwireforeachoutputParallelIrms(A/mm2)Primarywinding0.5mm1T0.7AVccwinding0.3mm1T0.1A1stoutputwinding0.4mm4T3.4A2ndoutputwinding0.4mm4T0.0A3rdoutputwindingmmT#DIV/0!A4thoutputwindingmmT#DIV/0!A5thoutputwindingmmT#DIV/0!A6thoutputwindingmmT#DIV/0!ACopperarea=5.6584mm2Fillfactor0.2Requiredwindowarea28.292mm28.DeterminetherectifierdiodesinthesecondarysideReversevoltageRmsCurrentVccdiode89V0.10A1stoutputdiode104V3.37A2ndoutputdiode6V0.00A3rdoutputdiode0V#DIV/0!A4thoutputdiode0V#DIV/0!A5thoutputdiode0V#DIV/0!A6thoutputdiode0V#DIV/0!A9.DeterminetheoutputcapacitorESRCurrentVoltagerippleRipple1stoutputcapacitor1000uF50mΩ2.7V0.3V2ndoutputcapacitor1000uF40mΩ0.0V0.0V3rdoutputcapacitoruFmΩ#DIV/0!V#DIV/0!V4thoutputcapacitoruFmΩ#DIV/0!V#DIV/0!V5thoutputcapacitoruFmΩ#DIV/0!V#DIV/0!V6thoutputcapacitoruFmΩ#DIV/0!V#DIV/0!V10.DesignRCDsnubberPrimarysideleakageinductance4uHNominalVoltageofsnubbercapacitor120VCapacitance#DIV/0!#DIV/0!#DIV/0!6.70.0#DIV/0!Diameter3.51.4Nominalsnubbercapacitorvoltageripple5%Snubberresistor=55.4㏀Snubbercapacitor=5.6nFPowerlossinsnubberresistor=0.3W(InNormalOperation)Maximumsnubbercapacitorvoltage=169.7VMaximumMOSFETvoltage=544.5V11.DesignFeedbackcontrolloopControl-to-outputDCgain=10Control-to-outputzero=3,185HzControl-to-outputRHPzero=21,774HzControl-to-outputpole=18HzVoltagedividerresistor(R1)5.6㏀Voltagedividerresistor(R2)4.7㏀Optocouplerdioderesistor(RD)1㏀431Biasresistor(Rbias)1.2㏀Feebackpincapacitor(CB)=4.7nFFeedbackCapacitor(CF)=33nFFeedbackresistor(RF)=2.2㏀Feedbackintegratorgain(fi)=2585HzFeedbackzero(fz)=619HzFeedbackpole(fp)=11293Hz1617.3734446216#-88.6#2515.2028405625#-87.81#4012.1082364840#-86.5#638.60993324163#-84.5#1004.79522833100#-81.32#1600.80072425160#-76.3#250-3.02852118250#-69.25#400-7.05551811400#-59.13#630-10.895154.4630#-47.65#1000-14.65914-11000#-36.78#1600-18.15713-51600#-29.17#2500-20.89212-82500#-26.35#4000-22.8612-114000#-28.26#6300-23.79911-136300#-34.74#10000-23.8869.9-1410000#-45.04#16000-23.0937.6-1516000#-56.98#25000-21.4154.7-1725000#-67.1#40000-18.71.1-1840000#-75.11#63000-15.408-3-1863000#-80.39#100000-11.69-7-18100000#-83.91#voRDiDRbiasR1R2BibiasCBvFB1:1FPSvo'CFRF431-40-2002040608010100100010000100000Gain(dB)Contorl-to-outputCompensatorT-180-150-120-90-60-30010100100010000100000Phase(degree)最小AC电压最大AC电压AC主频率输出电压1输出电压2输出电压3输出电压4输出电压5输出电压6最大输出功率Po=Vo*I036效率最大输入功率Pin=Po/Eff45输入滤波电容纹波电压Vdcripple=?最小直流电压最大直流电压Vdcmax=1.414*Vacmax374.71最大占空比MOS管电压值Vds=Vdcmax+Vor455.71反射电压Vor=Dmax/(1-Dmax)*Vdcmin81工作频率功率因素Iripple=2*Iedc*Krf0.808081主电感量L=(Vdcmin*Dmax)2/(2*Pin*f*Krf)848.1635最大峰值电流Ip=Iedc+Iripple/21.414141Irms=sqrt(3*Iedc2+(Iripple/2)2*Dmax/3)681.8182Iedc=Pin/Dmax/Vdcmin1.010101L=Vdcmin*Dmax/(f*Iripple)848.24830.6954270.69600385-265VAC230VAC1stGeneration800VClassKA1M0280RBKA5x0280R8001.22530677.0A/RNOA/RA/RNOTO-220F-4LTOP223YDVDKA1x0380RBKA5x0380R8002.15405067/505.0A/RNOA/RA/RNOTO-220F-4LTOP224YVCR/DVDKA1x0680BFS7M06808004.080100100/672.0LatchNOLatchLatchYESTO-3P-5LKA1H0680RFBFS7M06808004.0801001002.0A/RNOA/RA/RYESTO-3PF-5LKA1M0680RBFS7M06808004.080100672.0A/RNOA/RA/RYESTO-3P-5LKA1M0880B(F)FS7M08808005.0110130671.5LatchNOLatchLatchYESTO-3P(F)-5LKA1M0880DFS7M08808005.0110130671.5LatchNOLatchLatchYESTO-3P-5LOptimizedforforwardconverterKA2S0680BFS8S0765RCB8004.08010020~1502.0LatchNOLatchLatchYESTO-3P-5LSTR-F6653MonitorAN4105AN4103KA3S0680RFBKA5Q0765RTH8004.08010020~1502.0A/RNOA/RA/RYESTO-3PF-5LKA3S0880RFBKA5Q12656RT8005.011013020~1501.5A/RNOA/RA/RYESTO-3PF-5LKA1H0165RNKA5x0165RN6500.6101010010A/RNOA/RA/RYES8DIPTOP222PKA1H0165RKA5x0