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请教



你好:Hi:我的电路图如附件,主要问题是我的TPS76333加电开始时工作正常,工作一段时间就发热烫手,其负载只有液晶屏和蓝牙芯片,电流不是很大,有个电路板工作3天后发生这样问题,奇怪的是这种现象只发生在太阳能供电的电路板。电源供电的板子没有发生这种现象!