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LM3488做SEPIC架构时,短路测试异常

Other Parts Discussed in Thread: LM3488

大家好!

我最近在调试一款用LM3488做的SEPIC 升降压架构,可是发现短路测试时会出现频率紊乱(Vin=16V  Vout=12V Iout=2A  Fs=300k),不知为何?

轻、重载测试都还行,就是短路就失效,感觉乱跑了……

期望大侠们发表建议,

谢谢!