| 摘要 |
PROBLEM TO BE SOLVED: To provide an insulation power supply device in which shortening of the life of switching elements Sc#, S1¥# can be avoided, while avoiding increase in a surge voltage occurring when the switching elements Sc#, S1¥# are turned on.SOLUTION: The divided value of an output voltage from a fourth secondary coil 66b having a minimum output current, out of the secondary coils 60b, 62b, 64b, 66b, 68b constituting first through fifth transformers 60, 62, 64, 66, 68, is detected as a first feedback voltage Vfb1. In order to perform feedback control of the first feedback voltage Vfb1 thus detected to a target voltage Vtgt, on/off operation of a first voltage control switching element 80 is performed by a first power supply IC52. |
