= [107 / (19 + 0.6)] *[0.5 / (1- 0.5)]
= 5.5 ≈ 6
VIN(min) = 90* - 20 = 107V
匝比 n 可取 5 或 6,在此取 6 以降低铁损,但铜损将有所增加.
CHECK Dmax
Dmax = n (Vo +Vf) / [VIN(min) + n (Vo + Vf)]
= 6*(19 + 0.6) /[107 + 6*(19 + 0.6)] = 0.52