PLANAR TRANSFORMER

A planar transformer includes a magnetic core assembly, at least one printed circuit board, a magnetic conductive sheet and at least one winding module. The magnetic core assembly includes a first magnetic core and a second magnetic core. The printed circuit board is disposed between the first magnetic core and the second magnetic core. The printed circuit board includes a first winding. The magnetic conductive sheet is disposed between the first magnetic core and the second magnetic core to form a leakage inductance required by the planar transformer. The at least one winding module is disposed between the first magnetic core and the second magnetic core. The winding module includes a second winding and a plastic molding layer. At least a portion of the second winding is covered by the plastic molding layer. The at least one printed circuit board and the at least one winding module are individual components.