This document introduces a programmable, monolithic IC for fast charge management of nickel cadmium (NiCd), nickel metal-hydride (NiMH), or lithium-ion (Li-Ion) batteries. The product has several features, including safe management of fast charge, high-frequency switching controller, pre-charge qualification, fast charge termination criteria, selectable top-off mode, programmable trickle-charge mode, built-in battery removal and insertion detection, and sleep mode for low power consumption.
The bq2000T is a versatile, multi-chemistry battery charge control device designed for safe management of nickel cadmium (NiCd), nickel metal-hydride (NiMH), or lithium-ion (Li-Ion) battery packs. It detects the battery chemistry and proceeds with optimal charging and termination algorithms to eliminate undercharged or overcharged conditions.
The integrated high-frequency comparator allows the bq2000T to serve as the basis for a complete, high-efficiency power-conversion circuit. The device provides various charge termination criteria depending on the chemistry, including rate of temperature rise (AT/At) for NiCd/NiMH and minimum current or maximum temperature/time limits for Li-Ion batteries.
| Supply Voltage Range | 4.0V to 6.0V |
|---|---|
| Package Types | 8-Pin DIP, Narrow SOIC, or TSSOP |
It detects the chemistry by monitoring the battery-voltage profile during fast charge; if voltage rises to Vucv, it assumes Li-Ion.
It detects the chemistry by monitoring the battery-voltage profile during fast charge.
The bq2000T uses trickle-charge to condition the battery.