| 摘要 |
A power transformer having balance windings and application circuits thereof are provided to improve non-uniformity of a current which flows through the CCFL by supplying a stable induced voltage and a uniform load current. A power transformer having balance windings includes a ferrite core(20), a first bobbin(21), a second bobbin(22), a first balance winding(B1), and a second balance winding(B2). The ferrite core(20) has a first closed ferrite core and a second closed ferrite core which are connected to each other. The first bobbin(21) has a first hollow through portion, a low voltage winding region, and a high voltage winding region. The first hollow through portion receives a side bar of the first closed ferrite core. A low voltage winding winds the low voltage winding region. A high voltage winding winds the high voltage winding region. The second bobbin(22) has a second hollow through portion, a first winding region(220), and a second winding region(222). The second hollow through portion receives a side bar of the second closed ferrite core. The first balance winding(B1) winds the first winding region(220). The second balance winding(B2) winds the second winding region(222).
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