General Description

The MAX2003/MAX2003A are fast-charge battery charg-

ers (with conditioning) for NiCd (nickel cadmium) or

NiMH (nickel-metal hydride) rechargeable batteries. The

MAX2003A has the same features as the MAX2003 with

an additional pulsed trickle-charge mode to prevent den-

drite formation in NiMH batteries. Each can be config-

ured as a switch-mode current regulator or as a gating

controller for an external current source. Switch-mode

current regulation provides efficient energy transfer,

reducing power dissipation and the associated heating.

Gating control of an external current source requires

minimal components, saving space and cost.

On-chip algorithms determine charge termination, so the

MAX2003/MAX2003A can be used as stand-alone

chargers. Fast-charge termination is accomplished by

five methods: temperature slope, negative voltage

change, maximum temperature, maximum time, and

maximum voltage. As a safety feature, the start of fast-

charge is inhibited until battery voltage and temperature

are within safe limits. By selecting the appropriate

charge-termination method, a single circuit can be built

with the MAX2003/MAX2003A to fast-charge both NiMH

and NiCd batteries.

The MAX2003/MAX2003A provide a switch-activated

discharge-before-charge option that allows for battery

conditioning and more accurate capacity measure-

ment. Other features include optional top-off charging

and direct drivers for LED status lights.

The MAX2003, in DIP and wide SO packages, is a direct

plug-in replacement for the bq2003. The MAX2003/

MAX2003A also come in a space-saving narrow SO

package. The MAX2003A evaluation kit (MAX2003A

EVKIT-SO) is available to assist in designs.

________________________Applications

Battery-Powered Equipment:

Laptop, Notebook, and Palmtop Computers

Handy-Terminals

Portable Consumer Products:

Portable Stereos

Cordless Phones

Backup-Battery Applications:

Memory Hold-Up

Emergency Switchovers

____________________________Features

o Stand-Alone NiCd or NiMH Fast Chargers

o New Pulsed Trickle-Charge Mode (MAX2003A only)

o Provide Switch-Mode, Gated, or Linear Control

Regulation

o Small, Narrow SO Package Available

o On-Chip Fast-Charge Termination Methods:

• Temperature Slope

• Maximum Voltage

• Negative Delta Voltage

• Maximum Time

• Maximum Temperature

o Automatically Switch from Fast-Charge to

Trickle-Charge or Top-Off Charge

o Optional Discharge-Before-Charge

o Directly Drive Status LEDs

o Optional Top-Off Charge

NiCd/NiMH Battery

Fast-Charge Controllers

________________________________________________________________

Maxim Integrated Products

1

19-0371; Rev 4; 5/97

PART

MAX2003CPE

MAX2003CSE

0°C to +70°C

0°C to +70°C

TEMP. RANGE

PIN-PACKAGE

16 Plastic DIP

16 Narrow SO

___________________Pin Configuration

16

15

14

13

12

11

10

9

1

2

3

4

5

6

7

8

DIS

MOD

CHG

TM1

DVEN

DCMD

CCMD

TOP VIEW

MAX2003

MAX2003A

TEMP

MCV

TCO

SNS

BAT

TS

TM2

DIP/SO

MAX2003CWE

MAX2003C/D

0°C to +70°C

0°C to +70°C

16 Wide SO

Dice*

* Contact factory for dice specifications.

EVALUATION

KIT MANUAL

FOLLOWS

DATA

SHEET

MAX2003ACPE

MAX2003ACSE

MAX2003ACWE

MAX2003AC/D

0°C to +70°C

0°C to +70°C

16 Plastic DIP

16 Narrow SO

0°C to +70°C

0°C to +70°C

16 Wide SO

Dice*

Ordering Information

For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.

For small orders, phone 1-800-835-8769.