BQ34210-Q1

The BQ34210-Q1 is a high-precision fuel gauge IC designed by Texas Instruments for monitoring battery state in automotive and industrial applications. It supports single-cell lithium-ion and lithium-polymer batteries, offering accurate measurement of remaining capacity, voltage, current, and temperature through an integrated analog front-end and advanced algorithmic processing. The device features a 16-bit ADC with low quiescent current, enabling reliable performance even under varying load conditions. This fuel gauge integrates a proprietary Impedance Track™ algorithm that continuously tracks battery impedance to provide real-time State of Charge (SoC) estimation, ensuring accuracy across the entire discharge cycle—even at partial charge states. It also includes Coulomb counting for precise charge accumulation, which enhances accuracy over time. The BQ34210-Q1 supports programmable alert thresholds and configurable interrupt outputs for system-level safety and efficiency. Designed for robustness in harsh environments, the BQ34210-Q1 meets AEC-Q100 Grade 1 qualification, making it suitable for automotive systems such as electric power steering, infotainment units, and telematics modules. Its wide operating voltage range (2.7 V to 5.5 V) and low-power standby mode reduce overall system energy consumption. The device communicates via I²C interface, allowing seamless integration into microcontroller-based designs without requiring additional hardware. Additional features include built-in self-test functionality, temperature compensation, and support for multiple battery chemistries through software configuration. It also provides detailed diagnostic data, such as cell imbalance, internal resistance trends, and fault detection, which are critical for predictive maintenance and system reliability. With its compact 16-pin WSON package, the BQ34210-Q1 offers space-efficient implementation in densely packed electronic systems. The device is ideal for applications requiring high reliability, long-term accuracy, and compliance with automotive standards. It enables designers to implement intelligent battery management solutions that enhance user experience, extend battery life, and ensure safe operation under extreme conditions.