The BQ24901PWG4 is a single-cell linear charger IC from Texas Instruments for Li-Ion/Polymer packs. Its max charge current is 30 mA — that puts it firmly in trickle-charge territory, sized for small coin cells or very low-capacity Li-Po pouches (under 100 mAh). It is not a candidate for phone, tablet, or power-tool battery charging, where 1 A+ rates are standard. The battery termination voltage is fixed at 4.2 V, the standard for single-cell Li-Ion/Polymer. Input supply can go up to 10 V. The device includes short-circuit fault protection and programmable charge current and timer via external components.
Package and mounting
The BQ24901PWG4 comes in a 14-TSSOP package, 0.173-inch body width, 4.40 mm wide. It will survive a hot-air rework cycle if you preheat the board to 100 °C and keep the nozzle off the plastic. Mounting is surface-mount; the shipping medium is tube, not tape-and-reel, so factor that into pick-and-place setup if you are running a small batch.
Obsolete — sourcing reality
The BQ24901PWG4 carries an Obsolete lifecycle status. No stock-holding claim is made here.