Описание
The MAX2003 are fast-charge battery chargers (with conditioning) for NiCd (nickel cadmium) or NiMH (nickel-metal hydride) rechargeable 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 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 to fast-charge both NiMH and NiCd batteries. The MAX2003 provide a switch-activated discharge-before-charge option that allows for battery conditioning and more accurate capacity measurement. 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 also come in a space-saving narrow SO package.
- Stand-Alone NiCd or NiMH Fast Chargers
- 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
- Maximum Voltage
- Negative Delta Voltage
- Maximum Time
- Maximum Temperature
- Automatically Switch from Fast-Charge to Trickle-Charge or Top-Off Charge
- Optional Discharge-Before-Charge
- Directly Drive Status LEDs
- Optional Top-Off Charge
