DV2002TL2 datasheet(2/5 Pages) ETC2

2 / 5 page

Fixed Configuration

The DV2002L2/TL2 board has the following fixed char-

acteristics:

VCC (4.75–5.25V) is regulated on-board from the supply

at connector JP4 (DC:GND).

LED indicates charge status.

Charge initiates on the later application of the battery

or DC, which provides VCC to the bq2002/T.

As shipped from Benchmarq, the DV2002L2/TL2 linear

regulator is configured to a charging current of 1.25A.

This current level is controlled by the value of sense re-

sistor R7 by the relationship:

1.25V

CHG

The value of R7 at shipment is 1Ω. This resistor can be

changed depending on the application.

The suggested maximum ICHG for the DV2002L2/TL2

board is 1.5A. U2 must be mounted to an appropri-

ate heat sink.

The maximum cell voltage (MCV) is scaled to 2V/cell.

With the provided NTC thermistor connected between

THERM and BAT–, TCO = 50°C.

The thermistor is identified by the serial number suffix

as follows:

Jumper-Selectable Configuration

The DV2002L2/TL2 must be configured as described be-

low.

INH (JP2): Enables/disables charge inhibit (see

bq2002/T data sheet).

TM (JP1): Selects fast charge safety time/top-off (see

bq2002/T data sheet).

Number of Cells (JP3): A resistor-divider network is

provided to select 4 to 10 cells (the resulting resistor

value equalsN–1 cells). RB1 is a 100K

Ω resistor, and

RB2 (RB20–RB25) is jumper-selected.

Temperature Disable: Connecting a 10K

Ω resistor be-

tween THERM and BAT– disables temperature control.

Setup Procedure

Configure TM, INH, and number-of-cells (NOC)

jumpers.

Connect the provided thermistor or a 10K

Ω resistor

between THERM and BAT–.

Attach the battery pack to BAT+ and BAT–. For

temperature control, the thermistor must contact

the cells.

Attach DC current source to DC (+) and GND (–)

connections in JP4.

DV2002L2/TL2

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

Closed Jumper

Number of Cells

R13

R12

R11

R10

Input

Voltage

Current

Resistance

Wattage

to 25V

1.25

Ω

1.5A

0.83

Ω

Table 1. Lookup Table for R7 Selection

Identifier

Thermistor

Keystone RL0703-5744-103-S1

(blank)

Philips 2322-640-63103

Fenwal Type 16, 197-103LA6-A01

Ozhumi 150-108-00(4)

Semetic 103AT-2

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