DV2004L1_14 Datasheet, PDF (1/6 Pages) List of Unclassifed Manufacturers – Fast Charge Development System Control of PNP Power Transistor

DV2004L1
Fast Charge Development System
Control of PNP Power Transistor
Features
➤ bq2004 fast-charge control evaluation and
development
➤ Charge current sourced from an on-board
frequency-modulated linear regulator (up to 3.0A)
➤ Fast charge of 4 to 10 NiCd or NiMH cells and one
user-defined selection
➤ Fast-charge termination by delta temperature/delta
time (∆T/∆t), negative delta voltage (-∆V) or peak
voltage detect, maximum temperature, maximum
time, and maximum voltage
➤ -∆V/peak voltage detect, hold-off, top-off, maximum
time, and number of cells are jumper-configurable
➤ Programmable charge status display
➤ Discharge-before-charge control with push-button
switch or auto discharge-before-charge with jumper
➤ Inhibit fast charge by logic-level input
General Description
The DV2004L1 Development System provides a develop-
ment environment for the bq2004 Fast-Charge IC. The
DV2004L1 incorporates a bq2004 and a frequency-
modulated linear regulator to provide fast charge control
for 4 to 10 NiCd or NiMH cells.
The fast charge is terminated by any of the following:
∆T/∆t, -∆V or peak voltage detect, maximum tempera-
ture, maximum time, maximum voltage, or an inhibit
command. Jumper settings select the voltage termina-
tion mode, the hold-off, top-off, and maximum time lim-
its, and automatic discharge-before-charge.
The user provides a power supply and batteries. The
user configures the DV2004L1 for the number of cells,
voltage, charge termination mode, and maximum charge
time (with or without top-off), and commands the
discharge-before-charge option with the push-button
switch S1.
Please review the bq2004 data sheet before using the
DV2004L1 board.
Connection Descriptions
J1
THERM Thermistor connection
SNS
tor
Negative battery terminal and thermis-
connection
BAT
Positive battery terminal and high side
of discharge load
LOAD Low side of discharge load
GND
Ground from charger supply
DC
DC input from charger supply
JP1 INH
Inhibit input
3/98
Rev. B Board
1