DV2000S1 Datasheet, PDF (1/5 Pages) Texas Instruments – Multi-Chemistry Switching Charger Development System

DV2000S1 and DV2000TS1
Multi-Chemistry Switching Charger
Development System
Features
Ø Safe management of fast charge for NiCd, NiMH, or
Li-Ion battery packs
Ø On-board switching regulation for up to 3A charge
current (set to 1A for shipment)
Ø Fast-charge termination by peak voltage, minimum
current (Li-Ion), maximum temperature, or
maximum charge time
Ø Programmable charge rate and time-out
Ø Programmable top-off option for NiMH packs
Ø Trickle charge for conditioning deeply discharged
batteries
Ø Charge-status LED
Ø Direct battery connection
General Description
The DV2000S1 and DV2000TS1 are complete develop-
ment and evaluation environments for bq2000
multi-chemistry charge- control ICs. The DV2000S1 and
DV2000TS1 support up to 4 Li-Ion or 10 NiCd/NiMH
cells and can be user-programmed for other cell counts.
Charge qualification precedes fast charge. During quali-
fication, full-charge current is inhibited if the battery
voltage or temperature is outside predetermined and
user-defined thresholds, indicating a battery pack that
is deeply discharged, shorted, hot, or cold. During the
qualification interval, the LED flashes at a 1Hz rate. In
the case of a low battery voltage, the IC applies a
low-current trickle charge in an attempt to revive the
battery or to close the pack protector’s discharge switch.
When battery voltage and temperature reach the re-
quired thresholds, full charge begins.
The bq2000 completes the fast charge with the appropri-
ate charge algorithm. If the voltage on BAT input rises
to the internal V_MCV threshold, the IC assumes a Li-Ion
battery. Otherwise, the bq2000 assumes NiCd/NiMH
chemistry. The user can further customize the algorithm
by programming the device for top-off option
(NiCd/NiMH only) and time-out period.
Please review the bq2000 data sheet before using the
DV2000S1 and DV2000TS1 boards.
Connection Descriptions
J1
THERM Thermistor connection
BAT-
Negative battery terminal and
thermistor return
BAT+
Positive battery terminal
N/C
No connection
DC-
Charger supply ground
DC+
Charger supply positive
JP1
Top-off selection for NiCd or NiMH
JP2
Number of cell selection for Li-Ion
JP3
Number of cell selection for NiCd or
NiMH
Fixed Configuration
The DV2000S1 and DV2000TS1 boards have the following
fixed characteristics :
SLUU006A–June 1999—Revised OCTOBER 2000
Rev. D Board
1