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36Vo=9.00VIo=4.00Afsw=60Po=36.00Wefficiency(η)=87%Pin=49.66WVinmin=90.00VVinmax=264.00VVDCmin=90.00*1.2=100VVDCmax=264.00*1.4=369.6VIDCmax=0.166A0.4Ton=6.6666667usToff=10usT=66.66666667V一般在75~85之間Ipmax=0.8276A平均输入电流等于（平均电感电流乘以D）0.00081H=0.805555650t7t8torNa=15t線徑0.30224A/mm20.07555mm20.310146135mmn=1股線ISrmsMAX=5.9628A1.49071mm21.377691359mmn=2股線二次側的線粗,所以要考慮多股並繞.或三重絕緣線.0.9742mm0.04138A200.02617A0.00654mm20.0913mm線徑表另外要考慮是否能繞的下BOBBIN當中,若不能則要修改DUTY.以減少線圈圈數Np=[(Lp*Ip)/Ae*ΔBm]*108=根据輸出的功率W,可以決定使用的磁芯.它的有效截面積為Ae=(高電壓可取1.4V,低電壓可取1.2或1.15V)WesurpposethedutycycleDuty=高電壓入力時dutycycle取0.3~0.4為宜,一般用0.35,低電壓入力時dutycycle取0.4~0.5為宜.一般用0.45Vindcmin*Ton=Toff*Vflyback4.thePri-windingdiameterDp:IPrmsMAX=Ipmax*√(Duty/3)=3.theauxiliarywindingNa:Na=Vamin*Ns/(Vo+VF)=so,Vflyback=2*IDCmax/Duty=thePrimaryinductance:Lp=Vindcmin*Ton/Ipmax=1.thePrimarywindingNP:設電流密度δ=一般在4~5之間Sp(截面積)=IPrmsMAX/δ=線徑過大,考慮n股並繞.單線與n股線的關系是Dn√n=Dp.2.theSec-windingNS:NS=[(VO+VF)/Vflyback]*NP=(Vamin/Vindcmax)*Np=線號的選取參見Ss(截面積)=ISrmsMAX/δ=Ds=√(4SP/π)線徑過大,考慮兩股並繞.單線與n股線的關系是Dn√n=Dp.則,每股線徑為Dn=6.theaux-windingdiameterDa:Ia=Ipmax/hfe=開關管的放大倍數為Iarms=Ia*√(DUTY)=Sp(截面積)=ISrmsMAX/δ=DP=√(4SP/π)用一次側的線即可.DP=√(4SP/π)則,每股線徑為Dn=5.theSec-windingdiameterDs:ISrmsMAX=IPrmsMAX*√(Toff/3T)=Io*√(4T/3Toff)絞線線徑的計算:D=√n*d*1.155其中,n為股數,d為單股線徑,1.155為絞線系數.VO36VF1NP56NS20N=NP/NS2.8Vinmax=264Vinmax*1.414=373.296VL80MOSVDS556.89698mm2=0.98cm2kHz最底工作频率V*D16.666667usF=60K2PFK平均输入电流等于（平均电感电流乘以D）mH1350G一般取2200GV*Ton0.75VV*D10VN=Vin/Vout*(D/(1-D))6.45Vin/VoutD/(1-D)A6.83760680.3101mm二次側的線粗,所以要考慮多股並繞.或三重絕緣線.取(10~20)另外要考慮是否能繞的下BOBBIN當中,若不能則要修改DUTY.以減少線圈圈數磁通ΔBm大致取它的有效截面積為Ae=(高電壓可取1.4V,低電壓可取1.2或1.15V)高電壓入力時dutycycle取0.3~0.4為宜,一般用0.35,低電壓入力時dutycycle取0.4~0.5為宜.一般用0.45設驅動電壓Vamin為線徑過大,考慮n股並繞.單線與n股線的關系是Dn√n=Dp.VF是二次側diode的正向導通壓降取驅動組與二次側同相位時驅動組與一次側同相位時線徑過大,考慮兩股並繞.單線與n股線的關系是Dn√n=Dp.則,每股線徑為Dn=ISrmsMAX=IPrmsMAX*√(Toff/3T)=Io*√(4T/3Toff)16005958620.690.00026851850.268518519Voff*ToffVoff*(1-D)Voff=Vout*N15.503875970.85185185213.20700546CORE參數對照表Dimensions(mm)ApAeAwVeA*B*C(cm4)(mm2)(mm2)(mm3)TYPEECCOREEC353C8535.3*17.3*9.51.374184.30163.006530.00EC413C8541.6*19.5*11.62.5894121.00214.0010800.00EC523C8552.2*24.2*13.45.5980180.00311.0018800.00EC703C8571.7*34.5*16.417.8281279.00639.0040100.00TYPEEECOREEE05PC405.25*2.65*1.950.00132.635.0033.10EE6.3PC406.1*2.85*7.950.00153.314.4640.40EE8PC408.3*4.0*3.60.00917.0013.05139.00EE10/11PC4010.2*5.5*4.750.028712.1023.70302.00EE13PC4013.0*6.0*6.150.057017.1033.35517.00EE16PC4016*7.2*4.80.076519.2039.85672.00EE19PC4019.1*7.95*5.00.124323.0054.04900.00EE19/16PC4019.29*8.1*4.750.119122.4053.15882.00EE20/20/5PC4020.15*10*5.10.157231.0050.701340.00EE22PC4022*9.35*5.750.159041.0038.791610.00EE2329SPC4023*14.7*60.436835.80122.002320.00EE25/19PC4025.4*9.46*6.290.312840.0078.201940.00EE25.4PC4025.4*9.66*6.350.317340.3078.731963.00EE2825PC4028*12.75*10.60.852586.9098.105010.00EE30PC4030*13.15*10.70.7995109.0073.356310.00EE30/30/7PC4030.1*15*7.050.745559.70124.874000.00EE3528PC4034.6*14.3*9.31.339884.80158.005910.00EE40PC4040*17*10.72.2000127.00173.239810.00EE4133PC4041.5*17*12.72.8260157.00180.0012470.00EE42/21/15PC4042*21.2*154.9484178.00278.0019510.00EE42/21/20PC4042*21.2*206.4625235.00275.0023000.00EE47/39PC4047.12*19.63*15.624.7529242.00196.4021930.00EE50PC4050*21.3*14.65.7343226.00253.7321600.00EE55/55/21PC4055.15*27.5*20.713.6764354.00386.3443700.00EE57/47PC4056.57*23.6*18.89.7132344.00282.3635100.00EE60PC4060*22.3*15.69.8558247.00399.0227100.00EE50.3PC4050.3*25.6*6.11.8447120.85152.6412676.00EE62.3/62/6PC4062.3*31*6.13.0330153.01198.2219240.00EE65/32/27PC4065.15*32.5*2730.7625535.00575.0078700.00TYPEEFCOREEF12.6PC4012.7*6.4*3.60.031113.0023.90385.00EF16PC4016.1*8.05*4.50.080020.1039.82754.00EF20PC4020*9.9*5.650.101333.5030.241500.00EF25PC4025.05*12.55*7.20.237651.8045.872990.00EF32PC4032.1*16.1*9.150.651583.2078.306180.00TYPEEFDCORETYPEMATERIALEFD103F310.5*5.2*2.70.00847.2011.60171.00EFD123F312.5*6.2*3.50.018711.4016.38325.00EFD153F315*7.5*4.650.047015.0031.35510.00EFD203C8520*10*6.650.155031.0050.001460.00EFD253C9025*12.5*9.10.393858.0067.893300.00EFD303C9030*15*9.10.602869.0087.364700.00EI12.5PC4012.4*7.4*4.850.023514.4016.32308.00EI16PC4016.0*12.2*4.80.083919.8042.37670.00EI19PC4020*13.55*5.00.130524.0054.36950.00EI22PC4022.0*14.55*5.750.160642.0038.241630.00EI25PC4025.3*15.55*6.750.316541.0077.191927.00EI22/19/6PC4022.0*14.7*5.750.198037.0053.501550.00EI28PC4028.0*16.75*10.60.600586.0069.834145.00EI30PC4020.0*21.25*10.70.8207111.0073.946440.00EI33/29/13PC4033.0*23.75*12.71.5854118.50133.798002.00EI35PC4035.0*24.25*10.01.3343101.40131.596804.00EI3530PC4035.0*24.2*121.6592122.00136.008350.00EI40PC4040.0*27.25*11.652.3301148.00157.4411300.00EI50PC4050.0*33.35*14.65.5218230.00240.0821600.00EI60PC4060.0*35.85*15.69.8024247.00396.8627100.00EI70PC4070.0*54.0*31.637.7618698.00541.00101530.00TYPEEPCOREEP73C859.4*3.75*6.50.010210.709.50165.00EP103C8511.5*5.1*7.60.025511.3022.57215.00EP133C8512.8*6.5*9.00.045619.5023.40472.00EP173C8518.0*8.4*11.00.121033.7035.90999.00EP203C8524*10.7*150