| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a DC-DC converter capable of suppressing a serge voltage generated upon turning off a secondary side switching element. <P>SOLUTION: A DC-DC converter 10 includes: a transformer 28; primary side switching elements 20-26 connected to a primary coil 28a of the transformer 28; secondary side switching elements 30, 32 connected to a secondary coil 28b of the transformer 28; and a center tap 38 set on the secondary coil 28b of the transformer 28. The primary side switching elements 20-26 are driven so as to gradually increase the voltage applied to the primary coil 28a of the transformer 28, including a half-on driving circuit 70 applying a first voltage to the primary coil 28a of the transformer 28 and a full-on driving circuit 72 applying a higher second voltage than the first voltage to the primary coil 28a of the transformer 28 (steps 100-108). <P>COPYRIGHT: (C)2012,JPO&INPIT |
