Texas Instruments BQ2004 Evaluation Module for NiCd/NiMH, linear DV2004L1 DV2004L1 Datenbogen

Produktcode
DV2004L1
Seite von 5
value equals
N
2
– 1 cells). RB1 is a 150K
Ω resistor, and
RB2 (RB20–RB25) is jumper-selected.
Temperature Disable: Connecting a 10K
Ω resistor be-
tween THERM and SNS disables temperature control.
DSEL (JP2): Selects LED1 and LED2 display state (see
bq2004 data sheet, Table 2).
VSEL (JP3): Selects -
∆V or peak-voltage detection, or
disables voltage-based termination (see bq2004 data
sheet).
AUTO DIS SELECT (JP7): Jumping JP7 enables auto-
matic discharge-before-charge.
Setup Procedure
1.
Configure VSEL, TM1, TM2, DSEL, INH, and
number-of-cells (NOC) jumpers.
2.
Connect the provided thermistor or a 10K
Ω resistor
between THERM and SNS.
3.
If using the discharge-before-charge option, connect
a current-limiting discharge load between BAT and
LOAD.
4.
Attach the battery pack to BAT and SNS. For tem-
perature control, the thermistor must contact the
cells.
5.
Attach DC current source to DC (+) and GND (-)
connections in J1. (Note: Capacitors C2 and C3
must be changed from those shipped with the board
for input voltage in excess of 25V.)
3
DV2004L1
 
                      Rev. B Board
Symbol
Description
Minimum
Typical
Maximum
Unit
Notes
I
DC
Maximum input current
-
-
3
A
V
DC
Maximum input voltage
2.0 + V
BAT
or 8.5
-
18 + V
BAT
or 35
V
Note 1
V
BAT
BAT input voltage
-
-
24
V
V
THERM
THERM input voltage
0
-
5
V
I
DSCHG
Discharge load current
-
-
2
A
Note:
1.
The voltage at R14 is application-specific and limits the dissipation of Q2 to a safe limit during Q4
conduction. See Table 1 for recommended R14 selections per V
DC+
and I
CHARGE
.
Recommended DC Operating Conditions