Power Integrations LNK3604 LinkSwitch-XT2 Off-Line Switcher ICs are energy efficient, low-power ICs with integrated system level protection. The LinkSwitch-XT2 incorporates a 725V power MOSFET, oscillator, simple ON/OFF control scheme and a high-voltage switched current source. Additional features include are frequency jittering, cycle-by-cycle current limit and thermal shutdown circuitry, all onto a monolithic IC. The start-up and operating power are derived directly from the DRAIN pin, eliminating the need for a bias winding and associated circuitry. 
Feature
 
 
  
  - Lowest component count switcher solution
  
  - Selectable device current limit
  
  - Fully integrated auto-restart for short-circuit and open-loop protection
  
  - Optional self-biased supply
  
  - Pin-out simplifies PCB heat sinking
  
  - Hysteretic over-temperature protection
  
  - Input overvoltage line protection
  
  - Extended creepage between DRAIN pin and all other pins improves field reliability
  
  - 725V MOSFET rating series for excellent surge withstand
  
  - EcoSmart™ - Extremely Energy-Efficient