Patent ID: 8725023
Filing Date: 2014-05-13
Classification: G03G,H02M

Abstract:
1. A power supply system comprising: a switching power supply configured to output a first output voltage in normal output mode and a second output voltage lower than the first output voltage in low output mode; and a control unit configured to switch the mode of the switching power supply, the switching power supply comprising: a transformer configured to induce a voltage in a secondary side by oscillation of a primary side; a semiconductor switch connected to a primary coil of the transformer; a rectifier/smoothing circuit configured to rectify and smooth the voltage induced in the secondary side of the transformer; an overcurrent detection circuit configured to detect an overcurrent in the switching power supply and provided on the secondary side of the transformer, the overcurrent detection circuit comprising: a switch control circuit configured to control the semiconductor switch in a condition that the overcurrent is detected and thereby reducing the overcurrent.