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BQ25756: BQ25756 DRV_SUPPLY pin question

Part Number: BQ25756

Tool/software:

Hi Team,

Could you please kindly help to below questions comes from customer:

#1 Customer system would connect DRV_Supply to 12V(external LDO output), and they want to check if there has power up sequence requirement for DRV_Supply and VAC?

#2 If customer system detect an abnormal work condition like over current, then if the DRV_Supply 12V should also shut down, could it keep 12V, and just disable the power stage?

#3 If DRV_Supply always on, and BQ25756 output is disabled and VAC also not connected, then, any risk? 

Best regards

Jie