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LM5117 低端MOS管占空比丢失，而且展不开，占空比都是10%

yi zheng3
Prodigy 121 points
Other Parts Discussed in Thread: LM5117

用LM5117做24V转12V50A。原理图用推荐的修改了欠压和频率（频率改为105K）。LM5117  LO占空比丢失 ，而且展不开，无论输出电流1A还是30A，占空比都是10%。