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ucc28810外加场效应管问题

Other Parts Discussed in Thread: UCC28810, TL431

UCC28810外加场效应时出现炸管问题。我另外一块PCB上外加MDF8N60,工作正常,现在这块PCB上加MDF8N60或FQPF07n80都出现炸管现象。经检测ucc28810外加限流电阻出错,原为10欧姆的电阻变成了2M,请问这个电阻是炸管的原因吗?如果不是请问那些原因可能造成外加场效应管炸管?