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TPS565201连续 工作六天后坏了!

芯片工作时温度并不高,手摸上去只是温的,工作电流2.16A,这个工作条件应该是很舒适的,外围参数也没有异常,为什么会损坏?换一个芯片就好了,这个可靠性是否存在严重问题?