Switching power source and image forming apparatus including the same

摘要

In a switching power source, an OFF-period of switching is set according to a resonance cycle when a transformer is driven.

主权项

1. A switching power source comprising:
a transformer; a switching unit configured to switch a voltage supplied to a primary side of the transformer; an output unit configured to output a voltage generated on a secondary side of the transformer; and an OFF-period setting unit configured to set an OFF-period during which the switching unit is turned on twice according to a resonance cycle of the transformer, in a case where a state is shifted from a state that the switching unit is continuously driven to a state that an operation to turn on the switching unit at least twice is repeated in a predetermined cycle.