The BQ24261MRGET: The scorch mark on a dead board tells you this was a solid charger in its day, but for a new build or a repair you are looking at the open market.
3 A charge current in a 4×4 QFN — thermal budget matters
The BQ24261MRGET is a single-cell Li-Ion charger with a programmable constant-current charge profile, maxing out at 3 A. At 3 A the die temperature climbs fast; the datasheet's thermal pad layout recommendation needs to be followed to keep the charger from throttling back on a hot bench.
I²C control — programmable current and fault monitoring
The I²C interface lets the host microcontroller set the charge current on the fly and read fault conditions. Over-temperature and over-voltage protection are built in — the charger shuts down before the silicon or the battery sees an excursion. That makes this part a fit for designs where the system processor manages the charging profile rather than relying on a fixed resistor divider.
Industrial temperature grade — outdoor and enclosure use
The 13.2 V max supply input gives headroom for 5 V USB or 12 V wall-adapter rails without an external pre-regulator.