The BQ25618YFFR is a single-cell Lithium Ion/Polymer battery charger from Texas Instruments, controlled via an I²C interface for programmable charge current, voltage, and timer settings. Maximum charge current is 1.5A, and the battery regulation voltage tops out at 4.52V — typical for a single-cell Li-Ion termination point. The 30-DSBGA package (0.5 mm pitch, wafer-level) keeps the footprint small, but the thermal dissipation path runs through the board — the 1.5A ceiling is where the package and the copper area meet.
1.5A charge current in a 30-DSBGA — thermal planning matters
At 1.5A continuous charge, the internal FET dissipation depends on input-to-battery differential; a higher differential raises die temperature, and the DSBGA relies on the PCB copper for heat spreading. Fault protection covers over-current and over-voltage events, which helps when the input rail is noisy or the battery is disconnected mid-cycle. Supply voltage range extends to 13.5V max, so it can handle 5V USB or 9V/12V adapters without an external pre-regulator.
ROHS3 compliant, surface-mount in a 30-DSBGA — the reel and cut-tape options let you order prototype quantities or production reels.