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BQ27425YZFT-G1

TIBQ27425YZFT-G1

Texas Instruments
Battery Battery Monitor IC Lithium Cobalt Oxide 15-DSBGA
NRND10,426 in stock
Datasheet Digi-Key Mouser Compare Prices

Overview

The BQ27425YZFT-G1 is a system-side battery fuel gauge designed for single-cell LiCoO2 battery packs. It utilizes TI patented Impedance Track technology to provide accurate state-of-charge data by modeling the battery discharge curve and adjusting for aging, temperature, and self-discharge. The IC features an integrated 10 mOhm sense resistor and a built-in LDO, allowing it to be powered directly from the battery while minimizing the external bill of materials.

Why Choose This Part

The integrated 10 mOhm sense resistor reduces board space and simplifies PCB layout by eliminating high-precision external components. Its low power consumption, including a 8 uA standby mode and 23 uA sleep mode, ensures minimal impact on battery shelf life. The device simplifies firmware development by reporting calculated state-of-charge (SOC) and health metrics directly over I2C rather than requiring complex system-side algorithms.

Applications

Smartphones and Tablets
Provides high-accuracy remaining capacity reporting and state-of-health monitoring for internal Li-ion batteries.
Wearable Devices
Utilizes the ultra-small 15-DSBGA package and low 23 uA sleep current to extend runtime in space-constrained designs.
Portable Medical Instruments
Delivers reliable battery status via I2C for critical handheld diagnostic equipment using Lithium Cobalt Oxide chemistries.
Digital Cameras
Tracks battery discharge rates and aging to provide users with accurate time-to-empty estimates during high-drain operation.

Key Specifications

Function Battery Monitor
Interface I2C
Mounting Type Surface Mount
Package / Case 15-UFBGA, DSBGA
Number of Cells 1
Battery Chemistry Lithium Cobalt Oxide
Operating Temperature -40degC ~ 85degC (TA)
Supplier Device Package 15-DSBGA

Getting Started

Designers can evaluate this IC using the BQ27425EVM evaluation module along with the TI EV2400 interface adapter. Configuration and calibration are performed using the Battery Management Studio (bqStudio) software, which allows for fine-tuning of the Impedance Track parameters for specific LiCoO2 cell profiles.

Also Consider

BQ27441-G1A TITexas Instruments - Offers similar system-side fuel gauging in a small SON package for those preferring leaded PCB assembly over DSBGA.
MAX17048 Maxim Integrated / Analog Devices - A popular alternative that uses the ModelGauge algorithm which does not require a sense resistor, further reducing PCB footprint.
BQ27421-G1A TITexas Instruments - A similar Impedance Track gauge specialized for 4.2V Li-ion chemistries with integrated sense resistor and low-power modes.

Categories

Power Management > Battery Management Consumer Electronics > Battery Management