BQ2052SN-A515

The BQ2052SN-A515 from Texas Instruments is a primary lithium gas gauge IC designed for battery pack integration. It accurately measures available battery capacity in lithium primary batteries like Lithium Sulphur Dioxide and Lithium Manganese Dioxide. This IC provides a low-cost solution for battery monitoring, fitting within a small PCB space.

Key features include a single-wire communication interface (HDQ bus) for critical battery parameters, allowing microcontrollers to read and write internal registers such as available capacity, voltage, temperature, and current. The device automatically compensates for discharge rate and temperature to provide accurate capacity information across various operating conditions. Compensated capacity can be directly indicated using a programmable LED display configurable as two, four, or five segments.

The BQ2052SN-A515 is housed in a 16-pin SOIC package and supports surface mount installation. It operates within a temperature range of -20°C to 70°C. The IC can operate from the batteries in the pack, utilizing its REF output and an external FET for a simple voltage regulator.

This battery monitor IC is suitable for applications requiring precise battery capacity tracking and indication, offering a reliable and cost-effective solution for power management in portable devices and battery systems.