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如题，
我的思路是双级，第一级使用升压，后级有FLYBUCK隔离输出
亲；如果两路输入不隔离的话；是可以的，你还可以用BUCK；将AV85~265V直降至50V，然后做18～50V隔离DCDC输出。
确实是不隔离，低压不能通过BUCK开关管啊
亲；你这是AC85~275V输入；BUCK电压最高到了DC375V，一般用500、～650VMOSFET；低压网络可以通过二极管和高压BUCK后的电源线或。谁高谁供电。
