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BQ27520YZFT-G4

TIBQ27520YZFT-G4

Texas Instruments
Battery Battery Monitor IC Lithium Ion 15-DSBGA
NRND110 in stock
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Overview

The BQ27520YZFT-G4 is a single-cell Li-ion battery fuel gauge that utilizes Texas Instruments' patented Impedance Track technology to provide highly accurate state-of-charge monitoring. Unlike traditional voltage-based gauges, this IC accounts for battery aging, self-discharge, and temperature variations to report remaining capacity and health. It features an integrated 2.5V LDO and communicates via a standard I2C interface in a compact 15-pin DSBGA package.

Why Choose This Part

The primary advantage is the Impedance Track technology which eliminates the need for full charge/discharge cycles to relearn battery capacity. It supports large capacities up to 14500 mAh and offers flexible temperature sensing options including an internal sensor, external thermistor, or host-reported values.

Applications

Handheld Medical Devices
Provides critical state-of-health and state-of-charge data for portable diagnostic equipment using single-cell Li-ion packs.
Smartphones and Tablets
Enables precise time-to-empty calculations and battery aging estimation to manage device power profiles over time.
Wearable Electronics
Utilizes the ultra-low 23 uA sleep current and tiny 2.6mm x 2.0mm footprint for space-constrained, battery-powered designs.
Portable Wireless Speakers
Supports pack swapping with two separate battery profiles and low-battery digital output warnings for system alerts.

Key Specifications

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

Getting Started

To evaluate this part, use the BQ27520EVM evaluation module and connect it to a PC via the EV2400 interface tool. Engineers should use the TI Battery Management Studio (bqStudio) software to configure the flash parameters and perform the initial learning cycle for the specific battery chemistry being used.

Also Consider

BQ27421-G1 TITexas Instruments - Offers an integrated sense resistor to simplify PCB layout and reduce total component count.
MAX17048 Analog Devices - Provides a simpler ModelGauge algorithm that does not require a sense resistor or extensive characterization.

Categories

Power Management > Battery Management Consumer Electronics > USB & Charging Consumer Electronics > Battery Management