Patent ID: 7199694
Filing Date: 2007-04-03
Classification: H01F

Abstract:
1. An isolated dual-channel transformer, comprising: a bobbin having at least one primary coil-winding portion and at least two secondary coil-winding portions for coiling a winding, the bobbin having more than one isolation plate, each isolation plate being disposed between the primary coil-winding portion and a respective secondary coil-winding portion, the isolation plates having a plurality of fixed connecting posts and a plurality of pins, the bobbin having a wiring plate extended outwards from each side edge of the secondary coil-winding portions respectively, the wiring plate having at least one external terminal, the primary coil-winding portion being disposed between the secondary coil-winding portions, the secondary coil-winding portions being symmetric each other about the isolation plate as a center for balancing outputting; an insulating cover having a plurality of small slots disposed at the two side edges of the insulating cover and a large slot disposed at a central part of the insulating cover for covering the bobbin; and a set of cores integrated with the bobbin via the insulating cover; the insulating cover being used to isolate the set of cores from the winding, the insulating cover being so shaped that, in integration with the bobbin, the small slots correspondingly accommodate the external terminal of the wiring plate and the fixed connecting posts of the isolation plates, whereas the large slot correspondingly accommodates the primary coil-winding portion and the secondary coil-winding portions.