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请问下图中箭头所指向的一般使用什么模块
HI
用个降压芯片来做即可,按照你电流需要可以选择TPS54x40的各个版本(TPS54040, TPS54140,TPS54240,TPS54340)
设计参照TPS54160的设计方案: http://www.ti.com.cn/cn/lit/an/slva369a/slva369a.pdf (或者你直接用TPS54X60的各个版本,他是TPS54X40的60V输入版本)