High Efficiency Adapter Using Dual Switch PFC-Flyback Single Stage

High Efficiency Adapter Using Dual Switch PFC-Flyback Single Stage

  • Date of Publication 27 May 2008
  • Meeting end date 29 May 2008
  • Location Nuremberg, Germany
  • Conference/Proceedings International Conference for Power Conversion, Intelligent Motion & Power Quality, May 2008. PCIM Europe ‘08. Conference Proceedings 2008

The paper presents an innovative design that delivers 85W of power at more than 91% efficiency in a low profile using a high frequency quasi-resonant fly-back topology with synchronous rectification, and improved power factor based on dual switch method. A closed to 0.9 power factor is achieved employing only one magnetic element and two primary side switchers. A significant power density increase is obtained due to a combination of smaller bulk capacitor and a smaller magnetic element.