ADPL54203 Datasheet

• 3.4A, 60V Internal DMOS Power Switch
• 3.2V to 40V Input Voltage Range
• No Transformer Third Winding or Opto-Isolator Required for Output Voltage Regulation
• Quasi-Resonant Boundary Mode Operation at Heavy Load
• Low Ripple Burst Mode^® Operation at Light Load
• Low Quiescent Current
  • 115μA in Sleep Mode
  • 390μA in Active Mode
• Minimum Load < 0.5% (Typ) of Full Output 
• Temperature Compensation for Output Diode
• Internal Compensation and Soft-Start
• Output Short-Circuit Protection
• Accurate EN/UVLO Threshold and Hysteresis
• Thermally Enhanced 8-Lead SO Package

• Isolated Auxiliary/Housekeeping Power Supplies
• Isolated Industrial, Medical Power Supplies

The ADPL54203 operates from an input voltage range of 3.2V to 40V and delivers up to 17W of isolated output power. It is a monolithic micropower isolated flyback converter. By sampling the isolated output voltage directly from the primary-side flyback waveform, the part requires no third winding or optoisolator for regulation. The output voltage is programmed with two external resistors and a third optional temperature compensation resistor. Boundary mode operation provides a small magnetic solution with excellent load regulation. Low ripple Burst Mode operation maintains high efficiency at light load while minimizing the output voltage ripple.

A 3.4A, 60V DMOS power switch is integrated along with all the high voltage circuitry and control logic into a thermally enhanced 8-lead SO package. The high level of integration and the use of boundary and low ripple burst modes result in a simple to use, low component count, and high efficiency application solution for isolated power delivery.