| 摘要 |
PROBLEM TO BE SOLVED: To provide a switching power supply device that improves circuit efficiency effectively compared with the usual case. SOLUTION: Secondary windings 42A, 42B of a transformer 4 are configured of two sheet metals 43, 44. Rectifier diodes 51, 52 in a rectifier circuit 5 are connected between the two sheet metals 43, 44. Line inductance between the rectifier elements and the secondary windings is reduced compared with the usual case where rectifier elements are connected between secondary windings and a wiring area, and consequently a surge voltage to the rectifier elements is effectively suppressed. A plurality of diode chips 50 configuring the rectifier diodes 51, 52 are preferably disposed at equal intervals to each other along a winding direction of the sheet metals 43, 44. COPYRIGHT: (C)2009,JPO&INPIT |
