Standalone Linear NiMH/NiCd Fast Battery Charger

This is a simple Batteries charger for NiMH/NiCd.It Requires No Microcontroller or any Firmware.Linear Technology Corporation introduces the LTC4060, an autonomous 1- to 4-cell, 0.4A to 2A linear NiMH and NiCd battery charger. The LTC4060 includes all the functions required for a battery charger circuit, operating without the aid of a microcontroller or firmware. The design is simple and needs only three passive components. The LTC4060 also eliminates the need for a sense resistor and blocking diode, which increases efficiency and lowers the solution cost. This IC is targeted at applications including portable medical equipment, automotive diagnostic systems and industrial/telecom test devices.

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: <1?A
  • Manual Shutdown
  • Input Supply Range: 4.5V to 10V

 

LTC4060 Data sheet
The LTC4060 is offered in two packages, a 16-lead TSSOP and a 5mm x 3mm DFN. It uses an external PNP transistor to supply current to the battery or battery pack. The operating voltage ranges from 4.5V to 10V.