Patent ID: 7400063
Filing Date: 2008-07-15
Classification: H02H,H02M

Abstract:
1. A switched-mode power supply comprising: a primary circuit including a primary winding and a switching device, the primary winding constituting a part of a transformer; a plurality of secondary circuits each including a secondary winding and a load, the secondary windings constituting a part of the transformer, the switching device turning on/off an electric power supply to the primary winding to produce secondary electric powers applied from the plurality of secondary windings to the loads, a specified-voltage sensor section for detecting an output voltage from only a specified one of the secondary circuits; and an output limiting section for limiting an electric power output to at least one non-specified secondary circuit of the plurality of secondary circuits when the specified-voltage sensor section has detected a voltage being more than or equal to a first predefined value in the specified secondary circuit, wherein the output limiting section includes: