6 A fast-charge IC for single-cell Li-ion packs
The Texas Instruments BQ25910YFFR is a single-cell battery charger designed for multi-chemistry cells, delivering a constant charging current up to 6 A maximum. The device operates from a supply voltage up to 14 V, making it suitable for USB PD and high-voltage adapter inputs. Built-in fault protection includes over-voltage and short-circuit detection, critical for safe charging of 1-cell Li-ion packs with a termination voltage of 4.775 V.
I²C control and 36-DSBGA footprint
The charger is configured and monitored through an I²C interface, allowing the host processor to set charge current, termination voltage, and fault thresholds. The device is housed in a 36-DSBGA package (2.63 mm × 2.46 mm), a fine-pitch BGA that requires careful PCB layout for thermal dissipation and signal routing.