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LM5161效率低

Other Parts Discussed in Thread: LM5161

LM3161是同步BUCK,之前做过同步BUCK,效率都不低于95%,但是用LM5161这个片子,效率不到80%,没有自己计算参数,使用的是webench推荐的参数。下面是我用5161做的两个电路的具体参数。

BUCK:

1.

输入:15-75V

输出:12V

电流:1A

效率:80%

2.

输入:15-75V

输出:5V

电流:1A

效率:75%