BQ27421YZFT-G1D

Battery Management Overview

The BQ27421YZFT-G1D is a system-side fuel gauge integrated circuit from Texas Instruments designed for lithium-ion and lithium polymer batteries. It utilizes Impedance Track technology to accurately report remaining capacity, state-of-charge, and voltage. The device features an integrated sense resistor and operates within a supply voltage range of 3.6 V. It supports battery capacities between 100 mAh and 8000 mAh. The component functions in temperatures from -40°C to +85°C and is housed in a DSBGA-9 package.

Battery Management Feature Summary

• Integrates Impedance Track algorithm for precise state-of-charge reporting
• Includes internal sense resistor to minimize external component count
• Supports single-cell lithium-ion and lithium-polymer chemistries

Battery Management Applications

• Portable medical devices such as wearable health monitors
• Industrial inventory scanners
• Portable emergency lighting systems
• Consumer electronics requiring extended run-time

Battery Management Procurement Notes

Verify the specific suffix G1D against official datasheets to confirm parameter variations compared to other revisions like G1A or G1B. Ensure compatibility with the target battery chemistry and capacity range before integration. Confirm RoHS compliance status through manufacturer documentation. Validate that the DSBGA-9 package footprint matches the design layout requirements.

Battery Management Selection Notes

Select this component when system-side monitoring is required for portable applications. It is suitable for designs needing high accuracy without external sensing resistors. Consider the operating temperature range and supply voltage constraints. Evaluate if the Impedance Track technology meets the specific runtime extension goals of the application.

Battery Management Part Context

This part belongs to the BQ27421-G1 series of fuel gauges. It represents a compact solution for battery management in space-constrained devices. The series leverages advanced impedance tracking algorithms typically found in larger systems. It serves as a key component for managing single-cell lithium-based power sources.

Battery Management Replacement Considerations

Check for BQ27421YZFR-G1D or BQ27421EVM-G1A equivalents. Verify pinout and software compatibility before substitution.