| 摘要 |
PURPOSE: A planar transformer is provided to control an output voltage by securing the degree of freedom of winding number and to form a voltage output part in a bobbin. CONSTITUTION: A core induces magnetic field formation. An upper bobbin(104d) and a lower bobbin(104c) are coupled with the cores. At least one second winding part(110) is formed between the core and the upper bobbin. The second winding part transforms a power signal. A first wire(104b) is formed in the second winding part. A second voltage output part(210) is formed between the first wire and the bobbin.
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