TRANSFORMER CORE AND LEAKAGE TRANSFORMER EMPLOYING IT

PROBLEM TO BE SOLVED: To realize low profile, decrease the number of components, simplify the structure, and reduce the cost while enhancing the efficiency by one input multiple output system. SOLUTION: The transformer core has an outer circumference core 1 of rectangular frame shape, and a coil winding core 2 being secured to the bottom face of the outer circumference core 1 to link two opposing sides of the outer circumference core 1. The coil winding core 2 is a large diameter portion 3 having a larger diameter at least partially as compared with other parts, wherein a part of the large diameter portion 3 faces the outside between a primary coil and a secondary coil and constitutes a leakage gap to the leakage gap forming portion 1a of the outer circumference core 1. COPYRIGHT: (C)2006,JPO&NCIPI