| 摘要 |
PURPOSE:To supply a stable power from a multi-output switching power supply apparatus which supplies respective rectified outputs from a plurality of windings provided on the secondary side of an output transformer even if a load fluctuates and, further, suppress a loss caused by a dummy resistor. CONSTITUTION:The primary side of an output transformer 2 is driven to switch by a switching device 3 and AC voltages induced in respective secondary windings S1 and S2 are rectified by diodes 4 and 5 respectively and smoothed by smoothing capacitors 6 and 7 and smoothing coils 11 and 12 and outputted. The respective coils 11 and 12 have a common core 13. Further, resistors 18 and 19 are inserted between the coils 11 and 12 and the diodes 4 and 5 so as to be in series with the coils 11 and 12 and the capacitors 6 and 7 respectively and a power is regenerated on a heavy load side through elements while the switching device is in an OFF state. |
