BQ2000TSN-B5

The BQ2000TSN-B5 is a switch-mode multi-chemistry Battery Charger with a dt/dt termination. It chooses the proper battery chemistry (either nickel or lithium) and proceeds with the optimal charging and termination algorithms. This process eliminates undesirable, undercharged, or overcharged conditions and allows accurate and safe termination of fast charge. Depending on the chemistry, the bq2000T provides a number of charge termination criteria like rate of temperature rise (ΔT/Δt) (for NiCd and NiMH), minimum charge current (for Li-ion), maximum temperature and maximum charge time. For safety, the BQ2000T inhibits fast charge until the battery voltage and temperature are within user-defined limits. If the battery voltage is below the low-voltage threshold, the bq2000T uses trickle-charge to condition the battery. For NiMH batteries, it provides an optional top-off charge to maximize the battery capacity.