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TMS320F28377SPTPT 短路问题

目前一共小批生产 200套,产品在做公司做正常运行时,发现dsp(TMS320F28377SPTPT)有损坏,表现为供电3.3V短路,然后芯片拆下来,最终发现是36脚,54脚对地短路了。去年12月生产的50套有4pcs损坏,今年的生产的150套也有4pcs损坏。因为是偶发损坏,故障比较难复现,有什么好的建议去排查吗