| 摘要 |
PROBLEM TO BE SOLVED: To avoid the damage of a switching power supply control circuit etc., and to reduce power consumption in a standby state.SOLUTION: A switching power supply control circuit (24) for controlling a switching element (26), connected to the primary winding (18a) of a switching transformer (18), receives a rectification voltage (V44), obtained by rectifying a voltage from an AC power supply, through a first switch circuit (21), and also receives a rectification voltage (V48), obtained by rectifying an output voltage of a drive winding (18c) of the switching transformer (18), through a second switch circuit (22). The switch circuits (21, 22) are controlled by a standby control circuit (40) which receives power supply from a power storage device (38) charged by a voltage obtained by rectifying an output of a secondary winding (18b) of the switching transformer (18). |
