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DV2003S1_14

Description
Fast Charge Development System Control of On-Board P-FET Switch-Mode Regulator
File Size859KB,6 Pages
ManufacturerETC2
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DV2003S1_14 Overview

Fast Charge Development System Control of On-Board P-FET Switch-Mode Regulator

DV2003S1
Fast Charge Development System
Control of On-Board P-FET
Switch-Mode Regulator
Features
bq2003 fast-charge control evaluation and
development
Charge current sourced from an on-board
switch-mode regulator (up to 3.0 A)
Fast charge of 2 to 16 NiCd or NiMH cells
Fast-charge termination by delta temperature/delta
time (∆T/∆t), negative delta voltage (-∆V), maximum
temperature, maximum time, and maximum voltage
-∆V enable, hold-off, top-off, maximum time, and
number of cells are jumper-configurable
Charging status displayed on charge and
temperature LEDs
Discharge-before-charge control with push-button
switch
Inhibit fast charge by external logic-level input
Connection Descriptions
J6
DC+
THERM
DSCHG
BAT+
BAT–
GND
J2
+V
IN
JP1 DVEN
JP2 TM1
JP3 TM2
JP4 NOC
Voltage source for inhibit input
Inhibit input to prevent bq2003 activity
Negative voltage termination enable
TM1 setting
TM2 setting
Select number of cells
DC input from charger supply
Thermistor connection
Low side of discharge load
Positive battery terminal and high side
of discharge load
Negative battery terminal and
thermistor connection
Ground from charger supply
General Description
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.
3/98
Rev. A Board
1

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