Texas Instruments BQ2000 Switch-mode Multi-Chemistry Battery Charger with Peak Voltage Detection Termination BQ2000SN-B5TR

The BQ2000SN-B5TR is a programmable, monolithic integrated circuit designed for fast-charge management of multiple battery chemistries, including nickel-cadmium (NiCd), nickel-metal-hydride (NiMH), and lithium-ion (Li-Ion). It features a high-frequency switching controller that enhances charger efficiency and simplifies design. The device incorporates pre-charge qualification to detect shorted, damaged, or overheated cells, ensuring safe charging conditions. The BQ2000 utilizes peak voltage detection (PVD) for termination of fast charging in nickel-based batteries, while providing multiple termination criteria for lithium-ion batteries, including minimum charge current and maximum temperature limits. It also supports a selectable top-off mode to maximize battery capacity and includes a trickle-charge mode for reviving deeply discharged batteries. With built-in battery removal and insertion detection, the BQ2000 ensures safe operation. The device is available in an 8-pin SOIC package and operates within a temperature range of -20 to 70 degrees Celsius, making it suitable for various applications requiring reliable battery management.