1-cell Li-Ion charger with I²C programmability
The Texas Instruments BQ24261YFFT is a single-cell Lithium Ion battery charger that communicates over an I²C interface, letting the host set the charge current and monitor the charging process. It delivers up to 3A of programmable charge current from a supply up to 13.2V, with built-in over-temperature and over-voltage fault protection.
Obsolete — plan a replacement now
The BQ24261YFFT is listed as Obsolete by the manufacturer.
3A charge current and 13.2V input ceiling
The 3A max charge current suits fast charging of a single Li-Ion cell, typical for tablets, power banks, and portable instruments. The 13.2V maximum input voltage covers standard 5V USB adapters and 12V wall warts with margin. The I²C interface allows the host to dynamically adjust the charge current, enabling thermal throttling or input current limiting without external resistors.
36-DSBGA package — layout and rework notes
Housed in a 36-DSBGA (2.63x2.46 mm) package, this is a fine-pitch BGA with no exposed thermal pad. The small footprint saves board space but demands careful solder-paste stencil design and a controlled reflow profile. Store the reels dry — the BGA package is moisture-sensitive and requires bake before reflow if the seal is broken.