The BQ25611DRTWR from Texas Instruments is a battery management system with an I2C controlled 1-cell 3-A buck battery charger. It is designed to regulate the charging of a single cell Li-Ion or Li-Polymer. It provides 1.2-A boost operation and has USB detection capability. Its package is a 24-WQFN that provides an operating temperature range of –40 to 85°C. It is an integrated, ultrasafe single-cell battery charger for portable applications. It includes current and voltage regulation, analog-to-digital conversion, and digital signal processing of key parameters to provide a high degree of system integration. It also features a dedicated pin for GND sense, Brown-Out protection, and an I2C/SMBus serial interface, as well as overvoltage, short circuit, and thermal protection.