The BQ25618EYFFR is a highly integrated battery charge management and system power path management device designed by Texas Instruments (TI) for single-cell Li-Ion and Li-polymer batteries. This advanced chip is suitable for a wide array of portable applications, where efficient charging and power management are essential.

Key Features

• Advanced Charge Algorithms: The BQ25618EYFFR features TI's proprietary charge algorithms that ensure optimal charging efficiency and battery longevity. It supports multiple charge phases including pre-charge, fast charge, and termination.
• High-Efficiency Power Path: With an integrated FET for power path management, this device allows the system to be powered directly from the USB port while simultaneously charging the battery, maximizing the efficiency of power usage.
• Programmable Charge Parameters: Designers can program various parameters such as charge current, charge voltage, and termination current threshold, allowing flexibility to accommodate different battery sizes and chemistries.
• Thermal Regulation: To ensure safety and reliability, the BQ25618EYFFR includes thermal regulation that reduces charge current if the temperature exceeds a preset threshold.
• High Integration: The device integrates a synchronous switch-mode charge pump, power FETs, input current sensing and regulation, and all necessary control logic into a single package, simplifying design and reducing external component count.

Protection Features

• Battery Overvoltage Protection: Safeguards the battery from overcharging, which can extend battery life and enhance safety.
• Input Overvoltage Protection: Protects the system against voltage spikes from the USB input.
• Safety Timer: A programmable safety timer provides an additional layer of protection by terminating the charge if the battery does not reach the set voltage within a specified time.
• Thermal Shutdown: In the event of extreme temperature conditions, the device will shut down to prevent damage to both the battery and the system.

The BQ25618EYFFR is packaged in an ultra-small 2.00 mm x 2.80 mm, 42-ball wafer-level chip-scale package (WLCSP), making it an ideal solution for space-constrained applications. With its comprehensive suite of features and protections, the BQ25618EYFFR from Texas Instruments is a robust choice for designers looking to implement a reliable and efficient power management system in their portable devices.