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附件是硬件电路图,请专家帮我看看,可能哪里出问题了!!
Hi
不用的FBpin, 见datasheet 第14页描述,不是悬空处理。
IC根本就没有升压工作。就目前提供信息;如果PCB无误且完全焊接正确,那些FB端悬空;可能是最大问题。建议悬空FB全部通过电阻接地后再试。