LTC4060

U U LTC4060 Standalone Linear NiMH/NiCd Fast Battery Charger FEATURES ■ Complete Fast Charger Controller for Single, 2-, 3- or 4-Series Cell NiMH/NiCd Batteries ■ No Firmware or Microcontroller Required ■ Termination by –∆V, Maximum Voltage or Maximum Time ■ No Sense Resistor or Blocking Diode Required ■ Automatic Recharge Keeps Batteries Charged ■ Programmable Fast Charge Current: 0.4A to 2A ■ Accurate Charge Current: ±5% at 2A ■ Fast Charge Current Programmable Beyond 2A with External Sense Resistor ■ Automatic Detection of Battery ■ Precharge for Heavily Discharged Batteries ■ Optional Temperature Qualified Charging ■ Charge and AC Present Status Outputs Can Drive LED ■ Automatic Sleep Mode with Input Supply Removal ■ Negligible Battery Drain in Sleep Mode: <1µA ■ Manual Shutdown ■ Input Supply Range: 4.5V to 10V ■ Available in 16-Lead DFN and TSSOP Packages U APPLICATIO S ■ Portable Computers, Cellular Phones and PDAs ■ Medical Equipment ■ Charging Docks and Cradles ■ Portable Consumer Electronics DESCRIPTIO The LTC®4060 is a complete fast charging system for NiMH or NiCd batteries. Just a few external components are needed to design a standalone linear charging system. An external PNP transistor provides charge current that is user programmable with a resistor. A small external capacitor sets the maximum charge time. No external current sense resistor is needed, and no blocking diode is required. The IC automatically senses the DC input supply and battery insertion o...