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LM5116: HO LO的波形不正常,导致带载很差,可能原因在哪里?

Part Number: LM5116


原理图用的是官方的那个原理图,24V输入,5V输出,基本上没有带载能力,能实测到5V输出,HO 和 LO的波形很差,可能的原因在哪里呢?