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BQ27621YZFT-G1A

TIBQ27621YZFT-G1A

Texas Instruments
Battery Battery Monitor IC Lithium Ion 9-DSBGA
Active3,862 in stock
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Overview

The Texas Instruments BQ27621YZFT-G1A is a single-cell Li-Ion battery fuel gauge that uses the Dynamic Voltage Correlation (DVC) algorithm to report accurate battery status without requiring a sense resistor. It integrates an LDO and can be powered directly from the battery. This device is designed for system-side board mounting.

Why Choose This Part

This fuel gauge offers high accuracy for single-cell Li-Ion batteries without the need for an external sense resistor, simplifying BOM and PCB layout. Its Dynamic Voltage Correlation algorithm automatically compensates for factors like self-discharge, temperature, and varying discharge rates. With multiple low-power modes including SLEEP and HIBERNATE, it minimizes current consumption, extending battery life in power-sensitive applications.

Applications

Wearable Devices
Provides accurate battery state-of-charge and remaining capacity for smartwatches, fitness trackers, and other battery-powered wearables, helping optimize user experience and charging cycles.
Portable Medical Devices
Manages battery life in small, handheld medical instruments, ensuring reliable operation and timely recharging for critical applications.
Wireless Sensors
Monitors battery status in low-power wireless sensor nodes, extending deployment life by accurately predicting when battery replacement or recharging is needed.
Bluetooth Accessories
Integrates into Bluetooth headsets, speakers, and other peripherals to provide precise battery information to the host device or user.
Internet of Things (IoT) End Nodes
Enables intelligent power management for compact IoT devices, reporting critical battery metrics to ensure continuous operation and prevent unexpected shutdowns.

Key Specifications

Function Battery Monitor
Interface I2C
Mounting Type Surface Mount
Package / Case 9-UFBGA, DSBGA
Number of Cells 1
Battery Chemistry Lithium Ion
Operating Temperature -40degC ~ 85degC (TA)
Supplier Device Package 9-DSBGA

Getting Started

To get started with the BQ27621YZFT-G1A, engineers can utilize Texas Instruments' bqStudio development software for configuration and evaluation. An evaluation module (EVM) is recommended for prototyping and characterization of battery performance. The device communicates via an I2C interface, requiring a host microcontroller for data acquisition and control.

Also Consider

MAX17043G+T ADIAnalog Devices Inc. - The MAX17043G+T is a popular 1-cell fuel gauge that also uses a voltage-based algorithm for State-Of-Charge (SOC) determination, making it a good alternative for compact designs.
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