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BQ25185: Safety timer always expires

Part Number: BQ25185

Good Morning to all,

We are using in our design this IC to charge a 4500mAh li-ion battery set to 1A. We are struggling on getting it work properly due to the safety timer that always stops the charging process (STAT1 and STAT2 low) after 5/6 hours. Is there a well known issue on this IC timer management or a variability on tMAXCHG parameter that could be worth to know? And is there a solution on that? 

Thanks for your support.

Best regards.