| 摘要 |
PROBLEM TO BE SOLVED: To provide a DC-DC converter which uses a plurality of transformers capable of reducing the loss, preventing a transformer from heating, and improving the thermal conductivity of the core, and to provide an integrated transformer used for the DC-DC converter. SOLUTION: At energization of a switching element Q1, a terminal TR1 where a negative electromotive force is generated and a terminal TR2 where a positive electromotive force is generated are connected at an node N1. An output coil L1 and output terminals TO1 and TO2 are provided to a common current path, shared by transformers T1 and T2. Diodes D1 and D2 are inserted, respectively, with the direction from a node N3 to a terminal TR3, as well as, the direction from the node N3 to a terminal TR4 being set as the forward directions, and the operation of the first transformer is allocated to flyback operation, and that of the second transformer is allocated to forward operation, respectively. COPYRIGHT: (C)2008,JPO&INPIT
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