BQ40Z50-R2: Will not charge unless there is SMBus communication with the part.

Part Number:BQ40Z50-R2

Hello,

I presume the problem we are observing is related to a flash setting, however, we are at a loss to identify which one.

Our battery pack design functions just fine; except the battery will not charge at all unless there is SMBus communication with the part.  As soon as the SMBus is disconnected, or communication stops, charging stops.

NR=1 and the charge FET is configured to be ON in sleep mode.

Thanks,

Joe Perino