| 摘要 |
A switching power supply includes a transformer, a switching unit configured to switch a voltage input to the primary side of the transformer, a control unit configured to control the operation of the switching unit, and a detection unit configured to detect as a voltage a current flowing through the primary side of the transformer and supply the voltage to the control unit, wherein the detection unit controls the voltage to be supplied to the control unit based on the operating state of the switching unit. |
