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LMR16020: BUCK电路空载电感发烫严重

Part Number: LMR16020

  最近用了LMR16020做了一个DC24V-5V的buck电路,电压是出来了,但是空载情况下电感发烫严重,原理图如下

这颗芯片也不是第一次用,前面一样的设计没出什么问题,帮忙分析一下大概什么原因,SW波形如下测试了一下,电流钳售后维修去了,没有测相关的电流波形