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TPS92641 烧

Other Parts Discussed in Thread: TPS92641

你好,我用TPS92641设计一个电路,输入24V 输出9.6V, 0.3A..上电运行没问题。但我把输入电压调到58V后,通电,灯珠亮一会后。芯片 \  MOS 灯珠全烧了。我想问芯片没有作任何保护的么?为啥会出现全部烧的情况?这个现象太危险了,我想搞清楚根本原因,希望得到帮助。谢谢。