BQ35100PWR – TEXAS INSTRUMENTS

The BQ35100PWR is a Texas Instruments single-cell Li-ion battery gas gauge IC, packaged in a space-saving 6-pin WSON (4x4mm) package. It offers precise fuel gauging capabilities, utilizing a unique algorithm to accurately estimate remaining battery capacity and state-of-charge (SOC) even under varying load currents and temperatures. Operating from a typical voltage range of 2.5V to 4.5V, it features a low-power, high-accuracy coulomb counter with a typical accuracy of ±2% over its operating life. The device incorporates a model-based algorithm compensating for self-discharge and aging effects, improving long-term accuracy compared to simpler coulomb counting methods. Its integrated protection features include over-discharge and over-charge detection, enhancing battery lifespan and safety. Common applications include portable devices, wearables, and small-form-factor power banks requiring precise battery management and extended runtime. The BQ35100PWR’s advantages lie in its compact size, high accuracy, and integrated safety features, simplifying system design and minimizing external component count for robust Li-ion battery management solutions. Its I²C interface facilitates easy integration with microcontrollers.