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用TI的工具 WBDesign,自动生成的一个方案
AC = 85.0V---265.0V
Vout = 12.0V Iout = 3.0A
Device = UC3845N Flyback
60kHz,CCM
为何设计占空比 才 35.34%,如果选到 45%,不是能减低MOS的电流吗?
Hi
计算中最小输入电压85Vac时出现最大占空比，只要这个时候不超过50V(推荐45%）即可。如果你需要考虑到更低的电压，这个时候设计占空比需要更小一些。
