Texas Instruments BQ2000 Evaluation Module for Multi-Chemistry, switchmode DV2000S1 DV2000S1 데이터 시트
제품 코드
DV2000S1
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-
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-
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
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 :
1
DV2000S1 and DV2000TS1
Multi-Chemistry Switching Charger
Development System
SLUU006A–June 1999—Revised OCTOBER 2000 Rev. D Board