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TPS23754带不动10W的设计负载

Other Parts Discussed in Thread: TPS23754EVM-383

大家好!

       我按照TI的slvu304c设计的25W电源,按照参考设计的,可以带动25W的电子负载,但是带不动10W的设计负载。

自己检查了好久也没查到问题,请问有知道什么原因的大神么

一带负载就发现变压器噪音就起来了,电压12V就掉下去了!!!!!!

怎么检查这个问题啊