This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TPS54319的DC/DC电路为什么发生“啸叫”现象

Other Parts Discussed in Thread: TPS54319

TPS54319的DC/DC电路,输入电压5V,输出电压3.3V给系统的3G模块。

当3G模块待机时,只消耗150mA左右的电流,此时电路持续发生细细尖尖的啸叫,好像是来自电感。

电路具体参考附件。

请教为什么会发生啸叫?