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LM3150MH输出偏高和发热问题

Other Parts Discussed in Thread: LM3150

用LM3150做24V转15V8A电源,输出电容之前用瓷片电容+钽电容5个22UF输出负载到5A就跌落,换成100UF的铝电解后电流可以达到8A,空载电压确并不是设定的15V到了16V,这是什么原因呢?8A输出时LM3150很烫,10几分钟后会热保护,这类外置开关管的芯片这样的情况正常吗?