Patent ID: 7446637
Filing Date: 2008-11-04
Classification: H01F

Abstract:
1. A parent-child lead frame type transformer, having a transformer structure for receiving and converting an input power into an output power, and the parent-child leadframe type transformer, characterized by: a parent leadframe, having a first opening disposed at an end of the parent leadframe, and a second opening disposed at another end of the parent leadframe, wherein the length of the second opening is greater than the length of the first opening along the same axial direction, and a containing space is defined between the first opening and the second opening, the parent leadframe including a plurality of lead terminals disposed on a lateral edge of the parent leadframe; a child leadframe, having at least one coil winding slot for coiling a primary winding and at least one secondary winding therein, a through hole separated with the coil winding slot, a ferrite core module installed in the through hole, a magnetic closed loop formed around the external periphery of the child leadframe, an axial length of the child leadframe falling within the length of the first opening and the length of the second opening, such that the child leadframe and the ferrite core module are passed through the second opening and limited by the first opening to position the child leadframe and the ferrite core module in the containing space of the parent leadframe to constitute a transformer structure.