A lower-cost and more precise control methodology of regulating the output current of a Flyback converter from the primary side is provided. The methodology regulates the output current accurately in both continuous current mode (CCM) and discontinuous mode (DCM) and can be applied to most small, medium,...http://www.google.ca/patents/US7388764?utm_source=gb-gplus-sharePatent US7388764 - Primary side constant output current controller
