我是用TPS54331做了一个DC转DC的电路,输入9-16V,输出5V。调试时候发现当有液晶屏时(12V供电、500mA)电源无噪音,当把液晶屏取下以后,电流在200多mA时发现电源噪音很大,请TI的能否解答一下,或者有相同问题的人帮忙分析一下。
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Hi
确认一下吱吱声是不是来自电感,更换质量好一点的电感看看,主要饱和电流一定要足够。