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[FAQ] 负压电源设计

Other Parts Discussed in Thread: TPS54160A, TPS54160, TPS54260

在电路中经常需要负压,虽然有专门的负压芯片,但是受到的限制比较多,例如输入电压范围,最大电流等并不能满足规格要求,此时建议可以用buck芯片来做。例如TPS54160A:

所有buck芯片都可以用来做负压,主要满足规格上输入加上负压绝对值小于芯片耐压,电流规格小于芯片最大输出电流乘以1-D(D是占空比),因此可选择的空间非常大。