BQ2000

bq2000 www.ti.com SLUS138D – JANUARY 2008 – REVISED DECEMBER 2009 Programmable Multi-Chemistry Fast-Charge Management IC Check for Samples: bq2000 FEATURES 1 Safe Management of Fast Charge for NiCd, NiMH, or Li-Ion Battery Packs High-Frequency Switching Controller for Efficient and Simple Charger Design Pre-Charge Qualification for Detecting Shorted, Damaged, or Overheated Cells Fast-Charge Termination by Peak Voltage (PVD) for Nickel chemistries, Minimum Current for Li-Ion chemistries, Maximum Temperature, and Maximum Charge Time Selectable Top-Off Mode for Achieving Maximum Capacity in NiMH Batteries Programmable Trickle-Charge Mode for Reviving Deeply Discharged Batteries and for Postcharge Maintenance Built-in Battery Removal and Insertion Detection Sleep Mode for Low Power Consumption APPLICATIONS Multi-Chemistry Charger Nickel Charger High-Power, Multi-Cell Charger 8-Pin DIP or Narrow SOIC or TSSOP SNS VSS LED BAT 1 2 3 4 8 MOD 7 VCC 6 RC 5 TS GENERAL DESCRIPTION The bq2000 is a programmable, monolithic IC for fast-charge management of nickel cadmium (NiCd), nickel metal-hydride (NiMH), or lithium-ion (Li-Ion) batteries in single- or multi-chemistry applications. The bq2000 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 Depe...