DRV8705-Q1: charge pump

Part Number: DRV8705-Q1

Hello Experts,

My customer has question as follows. Would you answer it, please?
1. The datasheet mentioned that the DRV8705-Q1 is not designed to support significant voltage difference between PVDD and DRAIN. Customer would like to know what is significant voltage difference between PVDD and DRAIN.


2. Also customer would like to why significant voltage difference between PVDD and DRAIN cannot permit.

Best Regards,
Fujiwara