Home Battery management ICs Battery charger ICs
Home
Battery management ICs
Battery charger ICs

BQ2003

ACTIVE

Switch-mode NiCd/NiMH battery charger with negative dV and dT/dt termination

Order now
Data sheet

A newer version of this product is available

open-in-new Compare alternates
Similar functionality to the compared device
BQ25172 ACTIVE 0.8-A, one- to six-cell NiMH stand-alone linear charger in a QFN package Smaller solution size and more flexibility

BQ2003

ACTIVE
Data sheet Order now

Product details

Number of series cells 1, 2, 3, 4 Charge current (max) (A) 2 Vin (max) (V) 5.5 Cell chemistry NiCd, NiMH Battery charge voltage (min) (V) 0 Battery charge voltage (max) (V) 5.5 Absolute max Vin (max) (V) 7 Control topology Switch-Mode Buck Control interface Standalone (RC-Settable) Features BAT temp thermistor monitoring (hot/cold profile) Vin (min) (V) 4.5 Rating Catalog Operating temperature range (°C) -40 to 85
Number of series cells 1, 2, 3, 4 Charge current (max) (A) 2 Vin (max) (V) 5.5 Cell chemistry NiCd, NiMH Battery charge voltage (min) (V) 0 Battery charge voltage (max) (V) 5.5 Absolute max Vin (max) (V) 7 Control topology Switch-Mode Buck Control interface Standalone (RC-Settable) Features BAT temp thermistor monitoring (hot/cold profile) Vin (min) (V) 4.5 Rating Catalog Operating temperature range (°C) -40 to 85
PDIP (N) 16 181.42 mm² 19.3 x 9.4 SOIC (DW) 16 106.09 mm² 10.3 x 10.3
  • Fast charge and conditioning of nickel cadmium or nickel-metal hydride batteries
  • Hysteretic PWM switch-mode current regulation or gated control of an external regulator
  • Easily integrated into systems or used as a stand-alone charger
  • Pre-charge qualification of temperature and voltage
  • Direct LED outputs display battery and charge status
  • Fast-charge termination by V, maximum voltage, maximum temperature, and maximum time
  • Optional top-off charge
  • Fast charge and conditioning of nickel cadmium or nickel-metal hydride batteries
  • Hysteretic PWM switch-mode current regulation or gated control of an external regulator
  • Easily integrated into systems or used as a stand-alone charger
  • Pre-charge qualification of temperature and voltage
  • Direct LED outputs display battery and charge status
  • Fast-charge termination by V, maximum voltage, maximum temperature, and maximum time
  • Optional top-off charge

The bq2003 Fast Charge IC provides comprehensive fast charge control functions together with high-speed switching power control circuitry on a monolithic CMOS device.

Integration of closed-loop current control circuitry allows the bq2003 to be the basis of a cost-effective solution for stand-alone and system-integrated chargers for batteries of one or more cells.

Switch-activated discharge-before-charge allows bq2003-based chargers to support battery conditioning and capacity determination.

High-efficiency power conversion is accomplished using the bq2003 as a hysteretic PWM controller for switch-mode regulation of the charging current. The bq2003 may alternatively be used to gate an externally regulated charging current.

Fast charge may begin on application of the charging supply, replacement of the battery, or switch depression. For safety, fast charge is inhibited unless/until the battery temperature and voltage are within configured limits.

Temperature, voltage, and time are monitored throughout fast charge. Fast charge is terminated by any of the following:

  • Rate of temperature rise (t)
  • Negative delta voltage (-V)
  • Maximum voltage
  • Maximum temperature
  • Maximum time

After fast charge, an optional top-off phase is available. Constant-current maintenence charge is provided by an external trickle resistor.

The bq2003 Fast Charge IC provides comprehensive fast charge control functions together with high-speed switching power control circuitry on a monolithic CMOS device.

Integration of closed-loop current control circuitry allows the bq2003 to be the basis of a cost-effective solution for stand-alone and system-integrated chargers for batteries of one or more cells.

Switch-activated discharge-before-charge allows bq2003-based chargers to support battery conditioning and capacity determination.

High-efficiency power conversion is accomplished using the bq2003 as a hysteretic PWM controller for switch-mode regulation of the charging current. The bq2003 may alternatively be used to gate an externally regulated charging current.

Fast charge may begin on application of the charging supply, replacement of the battery, or switch depression. For safety, fast charge is inhibited unless/until the battery temperature and voltage are within configured limits.

Temperature, voltage, and time are monitored throughout fast charge. Fast charge is terminated by any of the following:

  • Rate of temperature rise (t)
  • Negative delta voltage (-V)
  • Maximum voltage
  • Maximum temperature
  • Maximum time

After fast charge, an optional top-off phase is available. Constant-current maintenence charge is provided by an external trickle resistor.
filter Find other Battery charger ICs
Download View video with transcript Video

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 4
Type Title Date
* Data sheet Fast-Charge IC datasheet (Rev. A) 21 Feb 2000
User guide DV2003L1 Fast Charge Development System Control of On-Board Linear Current 05 Sep 1999
User guide DV2003S1 Fast Charge Development System User's Guide 05 Sep 1999
User guide DV2003S2 Fast Charge Development System Control of On-Board n-FET Switch-Mode 05 Sep 1999

Design & development

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

Package Pins CAD symbols, footprints & 3D models
PDIP (N) 16 Ultra Librarian
SOIC (DW) 16 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
Information included:
  • Fab location
  • Assembly location

Support & training

TI E2E™ forums with technical support from TI engineers

View all forum topics

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos