Patent ID: 8648687
Filing Date: 2014-02-11
Classification: H01F

Abstract:
1. A symmetric planar transformer comprising a circuit board having two first bobbins mounted respectively on opposite side surfaces of the circuit board, and each first bobbin having two primary windings mounted respectively above and below the outer surfaces of the first bobbins, and each primary winding being a conducting wire, wound around the mounting tube of a corresponding first bobbin in a disc-like form and having two conducting terminals connected electrically to the circuit of the circuit board; two secondary windings disposed respectively between the side surfaces of the circuit board and the first bobbins, mounted around the mounting hole of the circuit board and the connecting portions of the first bobbins, and connected electrically to the circuit of the circuit board; and a magnetic core assembly mounted through the mounting tubes, the through holes and the connecting portions of the first bobbins.