Automotive-grade single-cell Li-Ion charger with 1.5A programmable current
The BQ24079QWRGTTQ1 is a Texas Instruments single-cell Li-Ion battery charger IC from the Automotive, AEC-Q100 series, delivering up to 1.5A of programmable charge current through a USB interface. Rated for a 26V maximum supply voltage and a -40°C to 125°C operating temperature range, it handles the voltage transients and thermal extremes found in automotive infotainment, telematics, and dash-cam battery-backup circuits.
Charge current, fault protection, and programmable control
The charge current is constant and programmable via an external resistor, with a maximum of 1.5A — enough to charge a typical 2000 mAh automotive-grade Li-ion cell in under 90 minutes at full rate. Built-in fault protection covers over-temperature, over-voltage, reverse current, and short-circuit conditions — the IC shuts down the pass FET and signals the host before the battery or wiring sees damage. Programmable features include charge current and safety timer, letting you tailor the charge profile to the cell capacity and the system's thermal budget without external logic.
Package, footprint, and hand-solderability
Housed in a 16-VFQFN exposed-pad package (3x3 mm, supplier device package 16-VQFN), the wettable-flank terminals make it feasible to hand-solder or inspect with a hot-air rework station — no hidden solder joints under the body. Surface-mount with wettable flank means the side of each pad has a solderable surface, so you can verify the fillet with a microscope after reflow — a big help for prototype builds and small-batch rework.