THIN TRANSFORMER COIL

摘要

PROBLEM TO BE SOLVED: To provide a thin transformer coil with high magnetic coupling, good conversion efficiency, and small defective effects from proximity effects between coil patterns in a high-frequency region. SOLUTION: Printed coils 2 and 3 are formed on both sides of an insulating board 1, and a core is assembled in the insulating board 1 with the printed coils 2 and 3. The input coil pattern 2 and the output coil pattern 3 are formed adjacently on the same face of the insulating board 1. The input coil pattern 2 and the output coil pattern 3 are formed facing opposite on the front and rear faces of the insulating board 1.