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LM74720-Q1: function query

Part Number: LM74720-Q1

Tool/software:

Hi team,

Harman are using LM74720-Q1 ideal diode controller in one of a global program in below circuit configuration.

 

How IC LM74720 will function when +B2 is applied before +B1?

Is there any possibility of Q1 or IC damage under such situation?

 

+B2 is Auxiliary Batt and +B1 is Main Batt supply.