BQ25898YFFR

The BQ25898YFFR from Texas Instruments is a highly efficient 4-A, 1.5-MHz switch-mode buck battery charger IC designed for single-cell Lithium-Ion/Polymer batteries. It features I2C control and supports an input voltage range of 3.9V to 14V, with an absolute maximum input voltage of 22V. The charger offers a maximum charge current of 4A and battery charge voltages between 3.84V and 4.6V.

Key features include integrated power path management, input current optimization (ICO), input current limit (IINDPM), input overvoltage protection (OVP), and thermal regulation. It also incorporates USB On-the-Go (OTG) functionality with an adjustable output from 4.5V to 5.5V and a selectable 500-KHz / 1.5-MHz boost converter. The device includes battery temperature monitoring (JEITA and hot/cold profiles) and an integrated ADC for system monitoring.

Packaged in a 42-DSBGA (2.8x2.5) format, the BQ25898YFFR is designed for surface mount applications. Its high charge efficiency (92% at 3A, 91% at 4A) and boost efficiency (94% at 5V/1A) make it suitable for power-sensitive applications. The charger supports auto-detection of USB standards (SDP, CDP, DCP) and non-standard adapters, along with programmable D+/D- drivers.

This IC is ideal for applications requiring fast charging capabilities and flexible power management. Its robust protection features, including overcurrent and over-temperature protection, ensure reliable operation. The narrow VDC (NVDC) power path management allows for instant-on operation even with no battery or a deeply discharged battery.