Patent ID: 7528552
Filing Date: 2009-05-05
Classification: H01F,H05B,Y02B

Abstract:
1. A power transformer combined with balance windings and used for driving CCFLs, said power transformer comprising: a ferrite core having a first closed ferrite and a second closed ferrite coupled together; a first bobbin having a first hollow through portion, a low voltage winding region and a high voltage winding region, said first hollow through portion being able to receive a side bar of said first closed ferrite, a low voltage winding being wound around said low voltage winding region, a high voltage winding being wound around said high voltage winding region; and a second bobbin having a second hollow through portion, a first winding region and a second winding region, said second hollow through portion being able to receive a side bar of said second closed ferrite, a first balance winding being wound around said first winding region and coupled to a first CCFL, a second balance winding being wound around said second winding region and coupled to a second CCFL.