会用LM5117 进行降压时,HO 、HB 、SW引脚输出干扰严重?该怎么消除?
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1. Layout是关键,HO,HB,SW所接的电感和MOS必须就可能的靠近IC摆放,PCB走线也尽量的短粗,其它敏感线务必避开此处,具体参考芯片规格书Layout相关章节
2.HO,HB可以预留串接10欧姆以内电阻,消除驱动上的振铃
3.SW 处可以预留一个电阻电容串联接地电路,消除振铃
附件资料可以参考下!