International Rectifier – IRS2983S: Versatile LEDrivIR™



IRS2983S: Versatile LEDrivIR™
The IRS2983S is a fully integrated, fully protected SMPS control IC for single stage Flyback and Buck-Boost topologies used in LED drivers and power supplies. It employs primary side regulation that reduces component count and simplifies design by eliminating the opto-isolator and other components necessary for isolated feedback for fixed loads. The IRS2983S may also be used in converters that include secondary feedback through an opto-isolator.


  • Critical conduction/transition mode operation
  • Burst mode operation at light load
  • Micropower start-up (150μA)
  • Latch immunity and ESD protection
  • Open load over-voltage protection
  • Noise immunity
  • Primary constant power control
  • Overcurrent protection
  • 2.5mA quiescent current
  • SO-8 package
  • 10k MSRP: $0.45 US