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LM3150输出电压不稳定

Expert 1550 points
Other Parts Discussed in Thread: LM3150, TPS5450, LM5160, LM5017

LM3150设计参数:输入10-34V,输出8.4V 8A

问题:在输入电压变化时输出电压也会变化,当输入10V时输出8.14V,输入34V时输出8.27V,而且在空载的情况下电流输入为40mA,在输入34V时功耗为1W左右,

           MOS的温度也升高15°,请问这是什么问题?

           LM3150和mos(IRFH7446)都是新的,不太可能是坏的。

           请各位前辈指点一二,谢谢。