Datasheet

Features
ä bq2002/T fast-charge control evaluation and
development
ä Charge current sourced from an on-board linear
regulator (up to 1.5A)
ä Fast charge of 4, 5, 6, 8,and 10 NiCd or NiMH cells
(contact Benchmarq for other cell counts)
ä Fast-charge termination by negative delta voltage
(-∆V) or peak voltage detect (bq2002) or ∆T/∆t
(bq2002T)
ä Maximum temperature and maximum time safety
terminations
ä -∆V/peak voltage detect, hold-off, top-off, maximum
time, and number of cells are jumper-configurable
ä Inhibit fast charge by a logic-level input
General Description
The DV2002L2/TL2 Development System provides a de-
velopment environment for the bq2002 and bq2002T
Fast-Charge ICs. The DV2002L2/TL2 incorporates a
bq2002/T and a 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, maximum temperature, maximum time, or an in-
hibit command for the bq2002T; or -∆V/peak voltage,
maximum temperature, maximum time, and inhibit
command for the bq2002. Jumper settings select the
top-off and maximum time limits.
The user provides a power supply and batteries. The
user configures the DV2002L2/TL2 for the number of
cells and maximum charge time (with or without top-
off).
Please review the bq2002T or bq2002 data sheet before
using the DV2002L2/TL2board.
Connection Descriptions
JP4
THERM Thermistor connection
BAT– Battery ground
BAT+ Positive battery terminal
GND Ground from charger supply
DC DC input from charger supply
JP3 NOC Select number of cells
JP2 INH Inhibit input
JP1 TM Timer,etc. Setting
1
DV2002L2/TL2
3/98 Rev. C Board
Fast Charge Development System
Control of LM317 Linear Regulator