19-0371; Rev 4; 5/97
NiCd /NiMH Ba t t e ry
Fa s t -Ch a rg e Co n t ro lle rs
/MX203A
Ge n e ra l De s c rip t io n
____________________________Fe a t u re s
♦ Stand-Alone NiCd or NiMH Fast Chargers
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.
♦ New Pulsed Trickle-Charge Mode (MAX2003A only)
♦ Provide Switch-Mode, Gated, or Linear Control
Regulation
♦ Small, Narrow SO Package Available
♦ On-Chip Fast-Charge Termination Methods:
• Temperature Slope
• Negative Delta Voltage
• Maximum Temperature
• Maximum Voltage
• Maximum Time
♦ Automatically Switch from Fast-Charge to
On-chip algorithms determine charge termination, so the
MAX2003/MAX2003A c a n b e us e d a s s ta nd -a lone
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
a re within s a fe limits . By s e le c ting the a p p rop ria te
charge-termination method, a single circuit can be built
with the MAX2003/MAX2003A to fast-charge both NiMH
and NiCd batteries.
Trickle-Charge or Top-Off Charge
♦ Optional Discharge-Before-Charge
♦ Directly Drive Status LEDs
♦ Optional Top-Off Charge
Ord e rin g In fo rm a t io n
PART
TEMP. RANGE
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
PIN-PACKAGE
16 Plastic DIP
16 Narrow SO
16 Wide SO
Dice*
MAX2003CPE
MAX2003CSE
MAX2003CWE
MAX2003C/D
MAX2003ACPE
MAX2003ACSE
MAX2003ACWE
MAX2003AC/D
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.
16 Plastic DIP
16 Narrow SO
16 Wide SO
Dice*
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.
* Contact factory for dice specifications.
___________________P in Co n fig u ra t io n
________________________Ap p lic a t io n s
TOP VIEW
CCMD
DCMD
DVEN
TM1
V
1
2
3
4
5
6
7
8
CC
16
15
14
13
12
11
10
9
Battery-Powered Equipment:
Laptop, Notebook, and Palmtop Computers
Handy-Terminals
DIS
MOD
CHG
TEMP
MCV
TCO
SNS
MAX2003
MAX2003A
Portable Consumer Products:
Portable Stereos
TM2
TS
Cordless Phones
BAT
Backup-Battery Applications:
Memory Hold-Up
V
SS
Emergency Switchovers
DIP/SO
________________________________________________________________ Maxim Integrated Products
1
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.