TPIC6A596: What happens if power supply is removed and outputs are connected to external 28V?

Part Number: TPIC6A596

Team,

I would like to clarify the behavior of TPIC6A596DW in the following scenario:

1. The device is switched on, TPIC outputs are opened.
2. Power supply is switched off, outputs are still connected to 28V (external power supply).

What is the behavior of the device in this condition?

• Is it a temporary shutting down?
• What is the max delay?
• Could you explain the internal mechanism? 

Please also take external environment influences into consideration, such as TPIC voltage, temperature, current, etc.

Thanks!