BQ2000TPWR

The BQ2000TPWR from Texas Instruments is a programmable, monolithic IC designed for safe management of fast charging for NiCd, NiMH, or Li-Ion battery packs. It functions as a high-frequency switching controller, offering an efficient and simple charger design.

Key electrical specifications include support for 1 to 4 series cells with multi-chemistry compatibility (Li-Ion/Li-Polymer, NiCd, NiMH). The maximum charge current is rated at 2A, with an input voltage range of 4V to 6V. The device features BAT temperature thermistor monitoring for hot/cold profiles and offers programmable features for current, timer, and voltage.

This IC utilizes a switch-mode buck control topology. It is housed in an 8-TSSOP package suitable for surface mounting. The operating temperature range is -20°C to 70°C.

Features include pre-charge qualification for detecting faulty cells, fast-charge termination by ΔT/Δt for nickel chemistries, minimum current for Li-Ion, maximum temperature, and maximum charge time. It also supports selectable top-off mode for NiMH and programmable trickle-charge mode for deeply discharged batteries or post-charge maintenance. Battery removal and insertion detection, along with a sleep mode for low power consumption, are also integrated.