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关于电源设计方案的问题



您好,我想请教下,如果我设计一个电源,是否可以对其中一级输出电压进行分压后形成新的支路进行后级处理,这样相比采样多片DC芯片是否有优势?

具体方案如图:1的方案是不是比2的方案更好,可以节省一片芯片?