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请教下AC12V 转DC输出的问题

Other Parts Discussed in Thread: LM3401, TPS92560, LM3444

请教各位

现在变压器输出12V,直接整流滤波后可以当DC来用吗?

我后面可以直接接个DC-DC 可以使用吗?最后降成3.3V 8A的输出。

后面输出负载电流很大的话,整流管有需要注意的吗?

这个交流电压输入的话要加安规吗?