BQ25895MRTWR

The BQ25895MRTWR from Texas Instruments is an I2C controlled single cell fast charger IC designed for Lithium-Ion/Polymer batteries. It supports a charge current of up to 5A and features a 3.1A boost operation capability.

This device operates with an input voltage range of 3.9V to 14V, with an absolute maximum input voltage of 22V. The battery charge voltage ranges from 3.84V to 4.6V. It utilizes a switch-mode buck control topology and offers high efficiency, with up to 93% charge efficiency at 2A and 91% at 3A. The boost converter provides an adjustable output from 4.5V to 5.5V with up to 3.1A output current, achieving 93% efficiency at 5V and 1A.

Key features include BAT temperature monitoring, IC thermal regulation, Input Current Optimization (ICO), Input Current Limit (IINDPM), Input Overvoltage Protection (OVP), an integrated ADC for system monitoring, and Power Path management. It supports USB input and adjustable high voltage adapters, with auto-detection for USB standards (SDP, CDP, DCP) and non-standard adapters. The operating temperature range is -40°C to 85°C.

The BQ25895MRTWR is supplied in a 24-WQFN (4x4 mm) package and is designed for surface mount applications. Its high integration includes all MOSFETs, current sensing, and loop compensation, simplifying system design.