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BQ77915: Moving from 4 cells to 6 cell charing and balancing

Part Number: BQ77915

Tool/software:

Hello TI Team, 

Our design was preivously based on 3 cells and we were using BQ7791500PWR for cell balacing and BQ25798RQMR for battery charing. Can you please guide me to select the approparite options for both cell balancing and charing for 6 cells. 

We have limited board area so options with least number of external parts would be great to use. Please note that we have ESP-32 MCU on our board that is for other functions to control and we will not have dedicated MCU for cell balancing. 

Kidn regards,

Muhammad Awais