| 摘要 |
PROBLEM TO BE SOLVED: To provide a compact and low-loss insulation type switching power supply at low cost.SOLUTION: The insulation type switching power supply includes: a first circuit board 10 on which a primary coil L11 constituting an isolation transformer T1 is formed with patterns; a second circuit board 20 on which secondary coils L21, L22 constituting the isolation transformer T1 are formed with patterns, and has a secondary coil pattern part 22 disposed to face the primary coil pattern part 12 of the first circuit board 10 with a predetermined gap G; and a core 30 composed of a magnetic substance and inserted into the primary coil L11 of the first circuit board 10 and the secondary coils L21, L22 of the second circuit board 20, to constitute the isolation transformer T1.SELECTED DRAWING: Figure 3 |
