Single-cell Li-ion charger with 1A programmable current
The BQ24093DGQT is a Texas Instruments linear charger IC designed for single-cell Lithium Ion/Polymer battery packs. It delivers a constant-current programmable charge up to 1A and terminates at a 4.2V battery voltage — the standard termination for most consumer Li-ion cells. The USB interface allows direct connection to a USB port or 5V adapter, with a maximum supply voltage of 6.45V providing headroom for input transients. Fault protection covers over-temperature, over-voltage, and short-circuit conditions, which means the part handles the three most common failure modes for a portable charger without external supervisory circuitry.
The base product number BQ24093 is current, and no official replacement or cross-reference has been published.