DRV8300: DRV8300: voltage rating spec for SHx negative transients

Hi Team,

I saw a key feature in the first page of DRV8300 datasheet is about “supporting negative transient upto -22V on SHx”, could you pls help me explain what this feature means?

I know that -22V is a good performance for this feature. I just want to check with you what situation the voltage on SHx Pin will drop to below zero and why higher voltage here is better? Many thanks!

Best Regards,

Sherman