Dallas, Tex. − Texas Instruments (TI) has claimed the industry's first fuel gauge with integrated protection in a 1.9- x 2.7- x 0.6-mm, 15-bump, chip scale package. This device is designed to accurately monitor and protect single-cell Li-Ion batteries used in space-constrained designs. The bq27741 pack-side fuel gauge uses TI's proprietary Impedance Track monitoring algorithm to increase battery run-time in consumer and portable industrial and medical devices.
Key features include:
- Longest battery run-time: Impedance Track algorithm accurately reports remaining battery capacity, state-of-health, state-of-charge and battery voltage.
- Simplified layout: High-side sense resistor allows the use of one common ground plane and removes offset and noise, which saves cost and board space.
- Protection: Provides high-accuracy fault detection and shutdown circuitry for better safety margins, including the use of full-cell voltage and charging range without false trips.
- Authentication: Integrated SHA-1 security encryption and battery ID features protect the system against possible counterfeit packs.
Designers can simplify battery gauging design with the bq27741 fuel gauge by using TI’s new Gauge Studio software tool, said the company. The file size of the design tool is about ten times smaller than TI's previous software, which will help reduce configuration and system firmware development.
Availability: Click here to order samples and an evaluation module.
Pricing: $1.81 in quantities of 1,000.