100-V No-Opto Flyback Regulator

Linear Technology recently announced H-grade versions of the LT8304/-1 monolithic flyback regulators with guaranteed operation for junction temperatures as high as 150°C. By sampling the isolated output voltage directly from the primary-side flyback waveform, it requires no opto-coupler or third winding for regulation.Linear LT8304HThe LT8304H/-1’s features, specs, and benefits:

  • VIN Range from 3 to 100 V
  • Up to 24 W of output power
  • LT8304-1 Capable of output voltages up to 1 kV
  • Onboard 2-A, 150-V integrated DMOS power switch
  • Off-the-shelf power transformers
  • No opto-coupler or transformer third winding required for voltage feedback
  • 116-µA Quiescent current
  • Boundary mode operation
  • Accurate input enable & undervoltage lockout with hysteresis
  • Output diode temperature compensation
  • H Grades: –40°C to 150°C operating junction temperature

Source: Linear Technology