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TPS63020问题

Other Parts Discussed in Thread: TPS63020

TI的工作人员你好:

我模仿TI的TPS63020评估板自己制作板子。

在测试时,前一天晚上电压输入输出都是正确的。第二天再测试的时候发现,输入电压和输出电压始终保持相等。请问这是为什么呢? 芯片不正常工作了。