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BQ2000PWRG4 Datasheet(PDF) 1 Page - Texas Instruments |
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BQ2000PWRG4 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 29 page 1 2 3 4 8 7 6 5 SNS LED BAT VSS MOD VCC TS RC bq2000 www.ti.com SLUS138D – JANUARY 2008 – REVISED DECEMBER 2009 Programmable Multi-Chemistry Fast-Charge Management IC Check for Samples: bq2000 1 FEATURES GENERAL DESCRIPTION • Safe Management of Fast Charge for NiCd, NiMH, or Li-Ion Battery Packs The bq2000 is a programmable, monolithic IC for fast-charge management of nickel cadmium (NiCd), • High-Frequency Switching Controller for nickel metal-hydride (NiMH), or lithium-ion (Li-Ion) Efficient and Simple Charger Design batteries in single- or multi-chemistry applications. • Pre-Charge Qualification for Detecting The bq2000 chooses the proper battery chemistry Shorted, Damaged, or Overheated Cells (either nickel or lithium) and proceeds with the • Fast-Charge Termination by Peak Voltage optimal charging and termination algorithms. This (PVD) for Nickel chemistries, Minimum Current process eliminates undesirable, undercharged, or overcharged conditions, and allows accurate and safe for Li-Ion chemistries, Maximum Temperature, termination of fast charge and Maximum Charge Time • Selectable Top-Off Mode for Achieving Depending on the chemistry, the bq2000 provides a Maximum Capacity in NiMH Batteries number of charge termination criteria: • Peak voltage, PVD (for NiCd and NiMH) • Programmable Trickle-Charge Mode for Reviving Deeply Discharged Batteries and for • Minimum charge current (for Li-Ion) Postcharge Maintenance • Maximum temperature • Built-in Battery Removal and Insertion • Maximum charge time Detection For safety, the bq2000 inhibits fast charge until the • Sleep Mode for Low Power Consumption battery voltage and temperature are within user-defined limits. If the battery voltage is below the APPLICATIONS low-voltage threshold, the bq2000 uses trickle-charge to condition the battery. For NiMH batteries, the • Multi-Chemistry Charger bq2000 provides an optional top-off charge to • Nickel Charger maximize the battery capacity. • High-Power, Multi-Cell Charger The integrated high-speed comparator allows the bq2000 to be the basis for a complete, high-efficiency battery charger circuit for both nickel-based and lithium-based chemistries. spacer between para and illustration 8-Pin DIP or Narrow SOIC or TSSOP Pin Names SNS Current-sense input VSS System ground LED Charge-status output BAT Battery-voltage input TS Temperature-sense input RC Timer-program input VCC Supply-voltage input MOD Modulation-control output 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Copyright © 2008–2009, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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