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TPS63020有噪声~~

Zheng Zhao1
Expert 1021 points
Other Parts Discussed in Thread: TPS63020

设计的原理图如下:

开关放在了EN引脚,用来使能TPS63020.

PCB也几乎按照官方的PCB LAYOUT画得.

结果最后焊好上电后,却有刺耳的噪声,尖锐,声音不大,但能听见..怎么回事啊...