| 摘要 |
PROBLEM TO BE SOLVED: To provide a power source device capable of achieving high power conversion efficiency with a simple configuration, and an image forming apparatus including the power source device.SOLUTION: When a switching circuit 37 is turned on or turned off, switching element 38 is individually turned on or turned off so as to reduce switching loss of the switching circuit 37. When the switching element 38 and a switching element 39 are both in a turned-on state, a drain current Ids mainly flows from the switching element 39 with small conduction resistance to a transformer 40 side, and thereby reducing conduction loss in the turned-on state. |
