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BQ24773: BQ24773 Facing problem with Input adaptor detection

Part Number: BQ24773

Hello TI, 
               As per the observation, when we are using different input adaptor for testing which 5V and different current rating input adapter, 

1st adaptor which is 5V/3A
2nd adaptor which is 5V/5A

Observation is,

1. 1st adaptor which is 5V/3A ,

Input voltage - 5V
Input current - 3A
Bq24773 output voltage - 3.49V (No load) 
Vregn voltage - 4.74V

Note - at first run Bq24773 output voltage - 4.4V (No load)  but after some time Bq24773 output voltage get change which is 3.49V, now continuously show's Bq24773 output voltage - 3.49V.
Observe results are on Default configuration and battery is not present.

2. 2nd adaptor which is 5V/5A

Input voltage - 5V
Input current - 5A
Bq24773 output voltage - 4.4V (No load) 
Vregn voltage - 4.74V

Note - Observe results are on Default configuration and battery is not present .

Notice this issues at also on different board, there is no any board issues 

How to resolve this problem and what is the root-cause of the issues ..?

Thank, 
Rahul