TIBQ27421YZFR-G1A
Overview
The Texas Instruments BQ27421YZFR-G1A is a single-cell battery fuel gauge IC offered in a variant with an integrated sense resistor. It performs coulomb-counting and battery state estimation to report state-of-charge, remaining capacity, voltage and current for rechargeable cells. The device is intended to be paired with a host microcontroller to provide accurate fuel-gauge information and battery-health monitoring.
Why Choose This Part
Choosing the BQ27421YZFR-G1A gives a compact solution with an integrated sense resistor option that can reduce BOM and simplify layout compared with a discrete sense-resistor design. It uses TIs proven fuel-gauge algorithms to provide SOC, capacity and runtime estimates, which eases software integration and improves user-facing battery reporting.
Applications
Getting Started
Begin with the product datasheet and application notes from Texas Instruments; TI provides PC configuration tools and reference code (such as bqStudio and gauge-config utilities) for their fuel-gauge family. Use the vendor evaluation module/EVM or a reference board when available to validate battery chemistry settings and to characterize your cell before production. Connect the gauge to your host microcontroller using the recommended host interface and follow TIs recommended register and configuration workflow.
