Texas Instruments BQ2005 Switch-mode NiCd/NiMH Battery Charger for Sequential Charging Of Dual Battery Packs BQ2005SG4

The BQ2005SG4 is a switch-mode battery charger designed for sequential charging of dual NiCd or NiMH battery packs. It features hysteretic PWM current regulation and can be integrated into systems or used as a stand-alone charger. The device supports pre-charge qualification based on temperature and voltage, ensuring safe charging conditions. Fast charge termination is achieved through multiple criteria, including temperature rise, negative delta voltage, maximum voltage, maximum temperature, and maximum time. Additionally, it offers optional top-off and pulse-trickle charging capabilities. The BQ2005SG4 includes direct LED outputs for battery and charge status, making it user-friendly for monitoring. Its design allows for high-efficiency power conversion, making it suitable for applications requiring reliable battery management.