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
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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 volt...