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BQ27441-G1

TIBQ27441-G1

MPN: BQ27441DRZT-G1A
Texas Instruments
Battery Battery Monitor IC Lithium Ion 12-SON (2.5x4)
Active4,996 in stock
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Overview

The BQ27441DRZT-G1A is a system-side fuel gauge for single-cell Li-ion batteries that utilizes TI patented Impedance Track technology. It provides highly accurate state-of-charge and remaining capacity data while requiring minimal host microcontroller intervention for battery characterization. The device integrates its own LDO, allowing it to be powered directly from the battery pack in a compact 12-pin SON package.

Why Choose This Part

This gauge simplifies system design by supporting a low-value 10 mOhm external sense resistor and featuring an integrated LDO. Its Impedance Track algorithm automatically adjusts for battery aging, temperature variations, and discharge rates without the need for complex lookup tables. With a standby current of just 9uA, it is optimized for always-on battery monitoring in power-sensitive applications.

Applications

Smartphones and Tablets
Provides precise battery level reporting for consumer mobile devices with embedded Li-ion packs.
Wearable Electronics
Leverages the ultra-low 0.6uA shutdown current to extend the shelf-life of fitness trackers and smartwatches.
Portable Medical Instruments
Delivers reliable state-of-health monitoring for handheld diagnostic equipment where battery reliability is critical.
Industrial Handhelds
Monitors battery aging and self-discharge in rugged mobile terminals used in warehouse environments.

Key Specifications

Function Battery Monitor
Interface I2C
Mounting Type Surface Mount
Package / Case 12-VFDFN Exposed Pad
Number of Cells 1
Battery Chemistry Lithium Ion
Operating Temperature -40degC ~ 85degC (TA)
Supplier Device Package 12-SON (2.5x4)

Getting Started

To evaluate this IC, use the BQ27441EVM evaluation module along with the EV2400 interface adapter and TI Battery Management Studio (bqStudio) software. Communication is handled via I2C, and the host must configure the design capacity and termination voltage in the data memory registers at startup. Design integration requires careful Kelvin connection routing to the external sense resistor for accurate current measurement.

Also Consider

MAX17048 Analog Devices / Maxim Integrated - An ultra-compact fuel gauge that uses the ModelGauge algorithm, eliminating the need for a current sense resistor.
BQ27421-G1 TITexas Instruments - A similar Impedance Track gauge offered in a smaller DSBGA chip-scale package for extreme space-constrained designs.
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