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UCC28064A: 用UCC28064做了一款500W电源,遇到PCBA低压时和产品外壳存在干扰问题,请协助。

Part Number: UCC28064A

Hi TI Team,

客户用UCC28064做了一款500W电源,现在遇到一个问题,就是在不装外壳的情况下,产品能正常工作,装到外壳以后,产品就工作不正常(主要在低电压输入),如附件视频,麻烦帮忙看一下可能存在的问题,怀疑是PCB布板干扰,PCB&SCH以及正常&异常驱动波形资料见附件,麻烦帮忙看一下,谢谢!

500W原理图-20240319.pdf

FD-500X REV0.2 20240119.pcbdoc