各位大神好,LM5118输入电压7~60V,输入在7~19V时输出12V 3A正常,输入在升到20V后输出就没有了,请教怎么调试,调哪里可以提高输入带宽
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输入升到20V时,电路在BUCK工作模式下,观察HW管脚的波形(并上传),同时看LO是不是低电平。
输入带宽调节是什么意思?如果指的是环路带宽,还是建议用WEBENCH仿真的推荐参数来设计