The flyback transformer is a crucial part of the flyback converter, which has the highest portion of total power losses for most applications. Accurately prediction of the power losses due to flyback transformer early in the design stage provides an advantage about revealing reliable prototypes. In this paper, several loss prediction methods are applied for a 40W universal input and single output DCM flyback transformer as; analytical calculations via well-known Steinmetz and Dowell's formulas, a simulation includ…