July 31, 2025

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Dallas

TX

United States

What's new

Texas Instruments (TI) today introduced new single-chip battery fuel gauges with first-of-its-kind adaptive Dynamic Z-Track™ technology for more efficient, reliable operation in battery-powered devices. Compared to traditional gauging methods, the predictive modeling algorithm in TI’s BQ41Z90 and BQ41Z50 gauges achieve industry-leading state-of-charge and state-of-health accuracy within 1% error, helping extend battery run time by up to 30%.

Why it matters

As users demand more power from electronics, such as laptops, e-bikes and portable medical devices, battery management systems (BMSs) must provide precise, accurate, real-time monitoring. The BQ41Z90 and BQ41Z50 fuel gauges with Dynamic Z-Track technology help engineers design electronic devices with accurate battery capacity readings, even under unpredictable loads. With this increased accuracy, engineers can select a battery size with confidence, eliminating the need for oversized batteries.

“Whether you’re finishing a project on your laptop or riding home on an e-bike, accurate battery capacity estimates and reliability are critical,” said Yevgen Barsukov, Ph.D., TI Fellow and head of BMS algorithm development. “Traditional battery monitoring methods often struggle with accuracy under erratic use conditions, leading to unreliable predictions. However, our new Dynamic Z-Track technology is a predictive battery model that can self-update across dynamic load conditions, like those created by AI applications, ensuring the most accurate run-time prediction. Evolving from 20 years of reactive monitoring, this innovation enables users to experience dependable function, safer operation, and precise tracking of battery age and run time.”

More details

Battery-powered electronics are becoming more complex, making it even more important to use board space efficiently. The BQ41Z90 is the industry’s first highly integrated fuel gauge, monitor and protector for 3-to-16 lithium-ion (Li-ion) battery cells in series. This single-chip solution enables engineers to reduce complexity and save as much as 25% of board space compared to traditional discrete solutions. The BQ41Z50 supports 2-to-4 cells in series.

For more information about BQ41Z90 battery gauges, see the technical article, “Redefining battery accuracy: How the Dynamic Z-Track™ algorithm predicts unpredictable battery load.”

Availability

Pre-production quantities of the BQ41Z90 and production quantities of the BQ41Z50 are available now on TI.com. Evaluation modules, reference designs and simulation models are also available.

Part number	Cells in series	Evaluation module
BQ41Z90	3 to 16	BQ41Z90EVM
BQ41Z50	2 to 4	BQ41Z50EVM

About Texas Instruments

Texas Instruments Incorporated is a global semiconductor company that designs, manufactures and sells analog and embedded processing chips for markets such as industrial, automotive, personal electronics, enterprise systems and communications equipment. At our core, we have a passion to create a better world by making electronics more affordable through semiconductors. This passion is alive today as each generation of innovation builds upon the last to make our technology more reliable, more affordable and lower power, making it possible for semiconductors to go into electronics everywhere. Learn more at TI.com.

Trademarks

Dynamic Z-Track is a trademark of Texas Instruments. All other trademarks and registered trademarks belong to their respective owners.