The Impact Of Low Output Voltage Requirements On Power Converters

The Impact Of Low Output Voltage Requirements On Power Converters

  • Date of Publication 06 May 1995
  • Meeting end date 12 May 1995
  • On page 1-10
  • Location San Jose, California, USA
  • Conference/Proceedings High Frequency Power Conversion, May 1995. HFPC '95. Conference Proceedings 1995, Tenth International

The trend to lower output voltage sets new challenges for the power conversion industry. The paper will present circuit techniques designed to employ low voltage Schottky rectifiers and will elaborate about the advantages and limitation associated with synchronized rectification. Based on the components available today a direct comparison between the Schottky rectifiers and synchronized rectifiers is made substantiated by experimental results. This paper further presents the impact of leakage inductance and circuit parasitic inductance on the low output voltage converter’ performance. A special chapter is dedicated to minimization of copper losses in the secondary winding of the transformer and the output inductor. 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.