Texas Instruments BQ2003 Evaluation Module for NiCd/NiMH, switchmode, up to 3A DV2003S1 DV2003S1 数据表

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bq2003 fast-charge control evaluation and
development

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Charge current sourced from an on-board
switch-mode regulator (up to 3.0 A)

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Fast charge of 2 to 16 NiCd or NiMH cells

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Fast-charge termination by delta temperature/delta
time (

∆T/∆t), negative delta voltage (-∆V), maximum

temperature, maximum time, and maximum voltage

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-

∆V enable, hold-off, top-off, maximum time, and

number of cells are jumper-configurable

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Charging status displayed on charge and
temperature LEDs

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Discharge-before-charge control with push-button
switch

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Inhibit fast charge by external logic-level input

The DV2003S1 Development System provides a develop-
ment environment for the bq2003 Fast-Charge IC. The
DV2003S1 incorporates a bq2003 and a buck-type
switch-mode regulator to provide fast charge control for
2 to 16 NiCd or NiMH cells.

Review the bq2003 data sheet and the application note,
“Using the bq2003 to Control Fast Charge,” before using
the DV2003S1 board.

The fast charge is terminated by any of the following:

∆T/∆t, -∆V, maximum temperature, maximum time,
maximum voltage, or an external inhibit command.
Jumper settings select the -

∆V enabled state, and the

hold-off, top-off, and maximum time limits.

The user provides a power supply and batteries. The
user configures the DV2003S1 for the number of cells,
-

∆V charge termination and maximum charge time (with

or without top-off), and commands the discharge-before-
charge option with the push-button switch S1.

J6

DC+

DC input from charger supply

THERM

Thermistor connection

DSCHG

Low side of discharge load

BAT+

Positive battery terminal and high side
of discharge load

BAT–

Negative battery terminal and
thermistor connection

GND

Ground from charger supply

J2

+V

Voltage source for inhibit input

IN

Inhibit input to prevent bq2003 activity

JP1 DVEN

Negative voltage termination enable

JP2 TM1

TM1 setting

JP3 TM2

TM2 setting

JP4 NOC

Select number of cells

3/98

Rev. A Board