TIBQ27520YZFR-G4
Overview
The BQ27520YZFR-G4 is a microcontroller-side fuel gauge for single-cell Li-Ion battery packs using TI patented Impedance Track technology. It provides highly accurate predictions of battery capacity and state-of-health by modeling battery impedance based on discharge rate, temperature, and cell aging. The device communicates over a 400-kHz I2C interface and includes an integrated 2.5V LDO to simplify the power subsystem.
Why Choose This Part
The Impedance Track technology eliminates the need for a full discharge cycle to learn battery capacity, offering 99 percent accuracy over the life of the battery. It operates with a very low run current of 0.118mA and features multiple power-saving modes, including a 23uA sleep mode and an 8uA shutdown mode. The tiny 15-pin DSBGA package with a 0.5mm pitch is ideal for space-constrained mobile applications.
Applications
Key Specifications
Getting Started
To evaluate this IC, use the BQ27520EVM evaluation module alongside the TI bqStudio software and an EV2400 interface adapter. Designers must configure the Data Flash parameters, including the 10-mOhm sense resistor value and specific chemical ID (ChemID) for the chosen cell. The host controller interacts with the gauge via standard I2C commands to read voltage, current, and state-of-charge data.
