I²C control — what it buys you
The I²C interface lets the system host set the charge current, termination threshold, input current limit, and timer. That means one BOM line covers multiple battery pack sizes by changing firmware rather than resistors. The constant-current charge mode is programmable, not fixed — useful for designs that ship with different cell capacities. The interface also provides status registers for fault reporting and charge cycle monitoring.
It is ROHS3 compliant. There is no official pin-compatible alternate listed in the TI portfolio, but the BQ25601 family shares the same base die and footprint across density options — verify the feature set against the specific variant before dual-sourcing.