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MAX2003

Maxim
Part Number MAX2003
Manufacturer Maxim
Description NiCd/NiMH Battery Fast-Charge Controllers
Published May 6, 2005
Detailed Description 19-0371; Rev 4; 5/97 NUAL KIT MA ATION HEET S A EVALU T A WS D FOLLO NiCd/NiMH Battery Fast-Charge Controllers _______...
Datasheet PDF File MAX2003 PDF File

MAX2003
MAX2003

Overview
19-0371; Rev 4; 5/97 NUAL KIT MA ATION HEET S A EVALU T A WS D FOLLO NiCd/NiMH Battery Fast-Charge Controllers ____________________________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 General Description The MAX2003/MAX2003A are fast-charge battery chargers (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 dendrite formation in NiMH batteries.
Each can be configured 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 fastcharge 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 measurement.
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