The Impact Of Low Output Voltage Requirements On Power Converters

The Impact Of Low Output Voltage Requirements On Power Converters

  • Date of Publication 20 Jun 1995
  • Meeting end date 22 Jun 1995
  • On page 59-68
  • Location Nuremberg, Germany
  • Conference/Proceedings International Power Conversion & Intelligent Motion, June 1995. PCIM '95. Conference Proceedings 1995, Thirtieth International

Today’s power conversion trend is to use lower output voltages. This avenue sets new challenges that must be faced. The paper presents several techniques applied in power converter circuits when using low voltage Schottky rectifiers. Also it will discuss the advantages and limitations associated with synchronized rectification. A comparison between Schottky rectifiers and synchronized rectifiers made by experimental results is presented. Further the negative impact of the leakage inductance and circuit parasitic inductance on the performance is analyzed. Special care is dedicated to the copper loss minimization in the secondary winding of the transformer and the output choke. Using circuit topologies doing this one arrives to a better copper utilization especially for low output voltage applications. The paper concludes with experimental results of Rompower’s 75W 3.3V output DC-DC converter operating from an input voltage of 36V to 60V.