Hello,
We are using the bq20z65 for a simple 4s battery pack. The design/layout for this simple battery is basically right out of documentation provided by TI. On the boards we just received, I notice a couple of problems that we have never experienced before and am wondering if somebody from TI can maybe point us in the right direction to determine the cause and find a solution.
When we are charging the battery (3A ~ 1C) we notice communication dropouts on the SMBus. The only other irregularity we notice is that 2.5V reference output from the bq20z65 is 2.65V when not charging, and increases to about 2.75V when charge current is in the sense resistor.
As mentioned, the layout guidelines were followed, do not see any component errors on the board. Just looking for some ideas as to where to look for cause/resolution.
Thanks,
Joe P.