DRV8889-Q1: open load fualt

Tool/software:

Hi team,

My customer is evaluating DRV8889-Q1 in their project and meet below issue now, could you please help review and give some comments? Thanks.

DRV8889-Q1 will report an open load fault under the following conditions:

1. VM Soft Start

2. When the voltage is restored after an undervoltage test 

May I know what is the possible cause of this open fault and is it related to the software configuration? 

If you need additional test results please feel free to let me know, thanks.

Regards,

Ivy