The BQ24071RHLT is a single-cell Li-Ion/Polymer linear charger IC from Texas Instruments. It delivers a programmable constant charge current up to 1.5 A max, with a 4.2 V battery termination voltage. The 16 V max supply input lets it run directly off a 12 V rail or unregulated wall adapter without a pre-regulator — handy in automotive and industrial designs where the bus can spike.
Thermal and protection — what the ratings buy you
On-chip fault protection covers over-temperature, reverse-current, and short-circuit — three failure modes that otherwise need external comparators or a P-FET. The programmable timer provides a safety timeout if the battery never reaches full charge, which is a UL/CE checklist item for portable equipment.
Package and footprint — field-fit reality
The 20-VFQFN exposed pad package (3.5x4.5 mm) is a surface-mount part with a thermal pad underneath. On a rework bench you need a hot-air station and a stencil for the pad — not a hand-solder swap in a parking lot.