BQ24156YFFT

The BQ24156YFFT from Texas Instruments is a compact and efficient switch-mode battery charger management device for single-cell Li-ion and Li-polymer batteries. It is designed for applications requiring fast charging capabilities, exceeding those of linear chargers, while preventing battery drainage through reverse leakage protection.

Key electrical specifications include a maximum operating input voltage of 9V and a charge current of up to 1.5A. The device provides high-accuracy voltage and current regulation, with charge voltage regulation accuracy of ±0.5% at 25°C and ±1% from 0°C to 125°C. Charge current regulation accuracy is ±5%, and input current regulation accuracy is also ±5% for 100 mA and 500 mA settings. The charger supports a battery pack voltage up to 4.44V and features programmable parameters such as input current limit, VIN DPM threshold, and charge regulation voltage via an I2C compatible interface.

This charger IC integrates power FETs and input current sensing, simplifying system design. It also includes robust protection features like over-temperature and over-voltage protection. The BQ24156YFFT is supplied in a 20-pin DSBGA (2.1 mm x 2 mm) package, suitable for surface mounting.

Applications for the BQ24156YFFT include mobile phones, MP3 players, and other handheld devices where efficient and reliable battery charging is essential.