BQ24155 Li-Ion Chargers The Texas Instruments bq24155 one-cell Li-Ion chargers with full USB compliance and accessory power connection are USB friendly switch-mode charge management devices for single-cell Li-Ion and Li-polymer batteries used in a wide range of portable applications. The TI device allows for charging faster than linear chargers from current limited input sources. TI bq24155 battery charger ICs integrate a synchronous PWM controller, power MOSFETs, input current sensing and overvoltage protection, high-accuracy current and voltage regulation, and charge termination into a small WCSP package. TI bq24155 chargers are designed for use with mobile phones / smart phones, portable media players, and handheld devices.