BQ2000SN

The BQ2000SN from Texas Instruments is a programmable, monolithic IC designed for the fast-charge management of nickel cadmium (NiCd), nickel metal-hydride (NiMH), or lithium-ion (Li-Ion) batteries. It is suitable for single- or multi-chemistry applications, automatically selecting the proper battery chemistry and employing optimal charging and termination algorithms.

Key features include fast-charge termination by peak voltage for nickel chemistries and minimum current for Li-Ion. It also supports selectable top-off mode for NiMH batteries and a programmable trickle-charge mode for reviving deeply discharged batteries. The device includes built-in battery removal and insertion detection, as well as a sleep mode for low power consumption.

This IC operates within a temperature range of -20 to 70°C and comes in an 8-pin SOIC package. It is designed for efficient and simple charger designs, utilizing a high-frequency switching controller. The BQ2000SN is part of a product line that is Last Time Buy and in the process of being discontinued, making it crucial to check for alternatives for new designs.

Applications include multi-chemistry chargers, nickel chargers, and high-power, multi-cell chargers. The device's programmable nature allows for tailored charging profiles to prevent undesirable undercharged or overcharged states.