BQ25700ARSNT — still in active production, multi-chemistry charger for 1–4 cells
The BQ25700ARSNT from Texas Instruments is a multi-chemistry battery charger controller that handles 1 to 4 series cells via an I2C interface.
Package and mounting
The I2C interface lets the host microcontroller set charge current, voltage thresholds, and termination criteria without external resistors — handy when you need to tweak the profile per battery chemistry or temperature. The built-in fault protection covers over-current, over-temperature, and over-voltage, which saves external supervisory circuitry on the board.
