JP1 INH

Inhibit input

JP2 DSEL

Display select

JP3 VSEL

Voltage termination select

JP4 TM1

TM1 setting

JP5 TM2

TM2 setting

JP6 NOC

Select number of cells

JP7

Auto discharge-before-charge select

JP8

Auto cycle select

Fixed Configuration

The DV2004S1/ES1/HS1 board has the following fixed charac-

teristics:

at connector J1 DC.

LED1 and LED2 indicate charge status.

LED3 can replace LED1 and LED2 and provide an op-

tional tri-color LED feature.

Charge initiates on the later application of the battery

Pin DCMD may be tied to ground through JP7 for auto-

matic discharge-before-charge. With JP7 open, a toggle

of switch S1 momentarily pulls DCMD low and initiates

a discharge-before-charge. The bq2004E output activates

FET Q1, allowing current to flow through an external

current-limiting load between BAT+ and LOAD on con-

nector J1.

As shipped from Benchmarq, the DV2004S1/ES1/HS1

buck-type switch-mode regulator is configured to a

charging current of 2.25A. This current level is con-

tionship:

I

0.225V

R

CHG

=

SNS

Ω. This resistor

can be changed depending on the application.

The

suggested

maximum

for

the

DV2004S1/ES1/HS1 board is 3A.

The maximum cell

voltage (MCV) setting is 1.8V.

DC voltage. The board is shipped with D5 shorted. The

user can modify this Zener diode for the application. Ref-

er to Table 1 for suggested D5 values for DC voltages.

With the provided NTC thermistor connected between

THERM and SNS, values are: LTF = 0°C, HTF = 40°C,

and TCO = 60°C. The

minimum = 0.82°C/minute, typical = 1.10°C/minute.

The thermistor is identified by the serial number suffix

as follows:

Jumper-Selectable Configuration

The DV2004S1/ES1/HS1 must be configured as de-

scribed below.

INH (JP1): Enables/disables charge inhibit (see

bq2004/E/H data sheet).

2

DV2004S1/ES1/HS1

Rev. C Board

Jumper Setting

Pin State

[ 1 2 ] 3

Disabled (high)

1 [ 2 3 ]

Enabled (low)

Jumper Setting

Pin State

[ 1 2 ] 3

High

1 [ 2 3 ]

Low

1 2 3

Float

+VDC Input

(Volts)

Motorola

Part No.

Nominal Zener

Voltage

Below 15

Shorted

0

15–18

1N749

4.3

18–21

1N755

7.5

21–24

1N758

10

24–27

1N964A

13

27–30

1N966A

16

30–32

1N967A

18

32–35

1N968A

20

Note:

Capacitors C2 and C3 must be changed from

those shipped with the board for input

voltage in excess of 24V.

Table 1. Lookup Table for D5 Selection

Identifier

Thermistor

K1

Keystone RL0703-5744-103-S1

(blank)

Philips 2322-640-63103

F1

Fenwal Type 16, 197-103LA6-A01

O1

Ozhumi 150-108-00(4)

S1

Semetic 103AT-2