BQ25910YFFR

The BQ25910YFFR from Texas Instruments is an I2C-controlled, 6A, three-level switch-mode buck battery charger designed for single-cell parallel charging applications. This IC supports multiple battery chemistries, including Li-Ion/Li-Polymer and Lithium Phosphate/LiFePO4, with a charge voltage range of 3.5V to 4.775V.

Key electrical specifications include a minimum input voltage of 3.9V and a maximum of 14V, with an absolute maximum rating of 20V. It offers a maximum charge current of 6A and features high charge efficiency, reaching 95.4% at 1.5A from a 5V input and 93.3% at 3A from a 9V input. The device operates at a switching frequency of 750kHz and provides high accuracy for charge voltage (±0.4%), charge current (±10%), and input current (±7.5%) regulation.

Designed for compact applications, the BQ25910YFFR is housed in a 36-ball DSBGA (YFF) package, measuring approximately 1.40 mm². It features surface mount technology and operates across a wide temperature range of -40°C to 85°C. The charger includes various safety and management features such as IC thermal regulation, input overvoltage protection (OVP), input current limit (IINDPM), and input voltage limit (VINDPM) for maximum power tracking.

This battery charger IC is suitable for applications requiring fast charging capabilities and efficient power management. Its high integration includes all MOSFETs, current sensing, and loop compensation, simplifying system design. The lossless charge current sensing and low battery leakage current during standby mode contribute to overall system efficiency.