TIBQ27421YZFT-G1A
Overview
The BQ27421YZFT-G1A is a system-side fuel gauge for single-cell Li-Ion batteries that utilizes TI patented Impedance Track technology. It provides high-accuracy battery capacity monitoring without requiring a dedicated sense resistor, minimizing board space and cost. The device communicates over I2C and is optimized for space-constrained applications with a compact 9-pin DSBGA package.
Why Choose This Part
This IC eliminates the need for an external current-sense resistor by using the internal resistance of the battery and PCB. It features ultra-low power consumption, drawing as little as 0.6uA in shutdown and 9uA in standby mode. The integration of Impedance Track technology allows the gauge to automatically account for battery aging and temperature fluctuations.
Applications
Key Specifications
Getting Started
To evaluate this part, use the BQ27421EVM evaluation module along with the EV2400 interface tool. Engineers can configure the gauge using TI Battery Management Studio (bqStudio) software to set capacity and voltage thresholds. Ensure the I2C lines have appropriate pull-up resistors and that the battery chemistry profile matches the G1A variant's 4.2V configuration.
Also Consider
