We are designing a new LiIon battery pack for which we will need to also design a charger.
The pack will use 3 LiFePO4 cells in series. There will be 3 of these series strings in parallel. Each cell is a 3.3Ah, 3.2V nominal with a standard charge current of 0.2C. This means a pack nominal voltage of 9.6V. This chemistry and cell capacity being chosen in anticipation of meeting ATEX explosive atmosphere requirements.
Our initial selection of AFE is the bq76920 and Battery Management Controller Companion chip bq78350.
Since this chip set includes features for charging balancing and gas gauge, what IC would best suit incorporation into the charger for this pack?
