CPC H01F 27/22 (2013.01) [H01F 27/24 (2013.01); H01F 27/28 (2013.01); H01F 2027/2819 (2013.01)] | 10 Claims |
1. A planar transformer comprising:
a primary printed circuit board (PCB) having at least a hole in which a first core and a second core are inserted and including a coil pattern;
a secondary PCB having at least a hole in which the first core and the second core are inserted and including a coil pattern; and
a heat dissipation plate disposed between the primary PCB and the secondary PCB and including at least a hole in which the first core and the second core are inserted,
wherein inner heights of the first core and the second core are larger than a sum of thicknesses of the primary PCB, the heat dissipation plate and the secondary PCB so that a leakage inductance of the planar transformer is adjusted by adjusting a thickness of the heat dissipation plate.
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