DV2002TL2 datasheet(1/5 Pages) ETC2

Part #	DV2002TL2

Description	Fast Charge Development System Control of LM317 Linear Regulator

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Features

ä bq2002/T fast-charge control evaluation and

development

ä Charge current sourced from an on-board linear

regulator (up to 1.5A)

ä Fast charge of 4, 5, 6, 8, and 10 NiCd or NiMH cells

(contact Benchmarq for other cell counts)

ä Fast-charge termination by negative delta voltage

(-

∆V) or peak voltage detect (bq2002) or ∆T/∆t

(bq2002T)

ä Maximum temperature and maximum time safety

terminations

ä -∆V/peak voltage detect, hold-off, top-off, maximum

time, and number of cells are jumper-configurable

ä Inhibit fast charge by a logic-level input

General Description

The DV2002L2/TL2 Development System provides a de-

velopment environment for the bq2002 and bq2002T

Fast-Charge ICs.

The DV2002L2/TL2 incorporates a

bq2002/T and a linear regulator to provide fast charge

control for 4 to 10 NiCd or NiMH cells.

The fast charge is terminated by any of the following:

∆T/∆t, maximum temperature, maximum time, or an in-

hibit command for the bq2002T; or -

∆V/peak voltage,

maximum temperature, maximum time, and inhibit

command for the bq2002.

Jumper settings select the

top-off and maximum time limits.

The user provides a power supply and batteries. The

user configures the DV2002L2/TL2 for the number of

cells and maximum charge time (with or without top-

off).

Please review the bq2002T or bq2002 data sheet before

using the DV2002L2/TL2 board.

Connection Descriptions

JP4

THERM

Thermistor connection

BAT–

Battery ground

BAT+

Positive battery terminal

GND

Ground from charger supply

DC

DC input from charger supply

JP3 NOC

Select number of cells

JP2 INH

Inhibit input

JP1 TM

Timer, etc. Setting

1

DV2002L2/TL2

3/98

Rev. C Board

Fast Charge Development System

Control of LM317 Linear Regulator

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