BQ2057WTSTR

The BQ2057WTSTR from Texas Instruments is a versatile linear charge controller ideal for single and dual-cell Lithium-Ion and Lithium-Polymer battery packs. It supports a maximum charge current of 2A and operates with an input voltage ranging from 4.5V to 15V, with an absolute maximum rating of 18V.

This IC features AutoCompTM dynamic compensation to reduce charge time by accounting for battery pack impedance. It includes integrated voltage and current regulation, with programmable charge current and options for high- or low-side current sensing. Additional features include optional cell-temperature monitoring, integrated cell conditioning for reviving deeply discharged cells, and automatic battery recharge functionality. Charge termination is managed by a minimum current threshold, and the device enters an automatic low-power sleep mode when VCC is removed.

The BQ2057WTSTR is available in an 8-TSSOP package, suitable for surface mounting. Its design minimizes heat dissipation with a low 0.3-V dropout voltage and offers better than ±1% voltage regulation accuracy with preset voltages. The standalone control interface is RC-settable, making it a flexible solution for various battery management applications.

This charge controller is designed for applications requiring precise battery charging and monitoring. Its features like temperature monitoring and cell conditioning contribute to battery longevity and safety. The charge status output can be used to drive single or dual LEDs or interface with a host processor.