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Product details

Parameters

Number of series cells 1, 2, 3, 4 Charge current (Max) (A) 2 Operating Vin (Max) (V) 6 Cell chemistry Li-Ion/Li-Polymer, NiCd, NiMH Battery charge voltage (Min) (V) 0 Battery charge voltage (Max) (V) 6 Absolute Vin (safety rating) (Max) ((V)) 7 Control interface Standalone (RC-Settable) Features BAT temp thermistor monitoring (hot/cold profile) Operating Vin (Min) (V) 4 Rating Catalog open-in-new Find other Battery charger ICs

Package | Pins | Size

PDIP (P) 8 93 mm² 9.81 x 9.43 SOIC (D) 8 19 mm² 3.91 x 4.9 TSSOP (PW) 8 19 mm² 3 x 6.4 open-in-new Find other Battery charger ICs

Features

  • 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

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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

Depending on the chemistry, the bq2000 provides a number of charge termination criteria:

  • Peak voltage, PVD (for NiCd and NiMH)
  • Minimum charge current (for Li-Ion)
  • Maximum temperature
  • Maximum charge time

For safety, the bq2000 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 bq2000 uses trickle-charge to condition the battery. For NiMH batteries, the bq2000 provides an optional top-off charge to maximize the battery capacity.

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.

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Technical documentation

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Type Title Date
* Data sheet Programmable MultiChemistry Fast-Charge Management IC datasheet (Rev. D) Dec. 07, 2009
Technical article When to use rechargeable batteries in small battery applications Oct. 01, 2019
Technical article Should I use a linear charger or a switching charger? Oct. 31, 2015
More literature Battery Management Solutions for Point of Sale Systems Aug. 18, 2014
Technical article Summertime and the livin' is easy Jun. 20, 2014
User guide BQ2000EVM Feb. 13, 2007
Application note U-504 Using the bq2000/T to Control Fast Charge (Rev. B) Dec. 02, 2004
User guide DV2000S1 Multi-Chemistry Switching Charger Development System User's Guide (Rev. A) May 31, 2000
Application note High Efficiency Dual Chemistry Charger Using the bq2000 Sep. 05, 1999

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARD Download
49
Description

The BQ2000EVM provides a convenient method for evaluating the performance of a charge management solution for portable applications using either the bq2000 or bq2000T. A complete and tested charger is presented. The charger is designed to deliver up to 1.0 A of continuous output current. The (...)

Software development

SUPPORT SOFTWARE Download
Temp Sense Designer Software
TEMPSENSE-SW The TempSense Designer software allows the user to easily design temperature sensing circuits for many of the Texas Instruments battery charger devices. A full listing of the supported devices is included under the "Support" menu in the program. The user can use the thermisters included in the (...)
Features

The program gives the user:

  • Worse-case limits of the resistance
  • Trip voltages
  • Temperatures of the design

Reference designs

REFERENCE DESIGNS Download
Programmable, Multi-Chemistry Fast Charge Management Reference Design
TIDA-00026 This reference design is a programmable, monolithic IC solution for fast-charge management of nickel cadmium (NiCd), nickel metal-hydride (NiMH), or lithium-ion (Li-Ion) batteries in single- or multi-chemistry applications. It chooses the proper battery chemistry (either nickel or lithium) and (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Buck (1.4 @ 1A)
PMP5211 — PMP5211 uses BQ2000 battery charger controller with external CSD25401 P-FET for a high efficiency 1 A charger of a 1 cell NiMH Battery. Top off is enabled and maximum time out is set to 5.7 hours for protection. With a 10k NTC thermistor on the Battery, thermal protection is also provided.
Design files

CAD/CAE symbols

Package Pins Download
PDIP (P) 8 View options
SOIC (D) 8 View options
TSSOP (PW) 8 View options

Ordering & quality

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  • Qualification summary
  • Ongoing reliability monitoring

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