Single-cell Li-Ion charger with I²C programmability
The BQ24251RGER is a single-cell Lithium Ion battery charger from Texas Instruments that accepts a supply up to 10.5V and delivers a programmable constant charge current up to 2A via I²C control. This makes it suited for portable devices where the host microcontroller adjusts the charge rate based on battery temperature or input power limits. The charger integrates fault protection against overcurrent, overtemperature, and overvoltage conditions, reducing the need for external supervisory circuitry.
Parametric highlights and package details
The 24-VFQFN Exposed Pad package (4x4 mm body) suits compact portable designs where thermal dissipation through the pad is needed. The battery pack voltage is regulated to 4.2V, and the charge current is constant and programmable — only the current is adjustable via I²C, not the voltage.
NRND status and sourcing posture
This means the part is still available for existing production but is not intended for new designs — a successor or alternative should be evaluated for any new BOM. The part is available in Tape & Reel (TR) and Cut Tape (CT) options.