DCM/BCM模式最小输入电压85V最大输入电压265V输出电压12V输出电流0.42A输出功率5.04W预计效率0.9骨架AE118mm^2计算时用骨架AE1.18cm^2最大磁场强度Bmax0.2T计算时用Bmax2000Gauss开关频率60KHz占空比0.45输入功率5.6WVdc_min108.171VVdc_max374.71V原边峰值电流Ip20.230088368A原边电流Ip10ADeltaIp0.230088368A原边电感量Lp3.525960508mH一次侧绕组匝数Np34.37637712T输出整流管及线损压降Vf10.7V最终输出电压Vs12.7V二次侧绕组匝数Ns4.932909605TVcc启动电压13V辅助绕组电压Vf212V辅助绕组Na4.661016949T原Np34T副Ns5T辅Na5T感量Lp3.53mH初级线径0.154683667mm次级线径0.381558511mm辅助线径0.12~0.2mm最终结果OB:52K,大功率ICE:67K0.230088368OB:13V,大功率ICE:16VPQ2620:119PQ2625:118EF20:33.5EF25:51.8EE13:17.10EE16:19.20EE19:23.00原边电流有效值Iprms0.09391362副边电流有效值0.571428571辅助电流有效值0.1线径密度5小功率取0.12,大功率取0.2线径计算(按5A/mm^2)Ip1/2.451.5*Io/Dmax/2.45线径计算(按5A/mm^2)