Power supply system, image forming apparatus having the same, and low-capacity power supply circuit
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United States of America Patent
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Sep 8, 2015
Grant Date -
Jan 31, 2013
app pub date -
Jul 25, 2012
filing date -
Jul 29, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
A power supply system includes: a switching power supply, which rectifies and smoothes an AC voltage of an AC power supply to generate a first DC voltage in a normal mode; a control unit, which controls the switching power supply to switch between the normal mode and a power saving mode; and a low-capacity power supply circuit, which supplies power to the control unit in the power saving mode, and which includes: a first capacitor, which includes a first electrode connected to one end of the AC power supply, and a second electrode; a second capacitor, which includes a first electrode connected to the other end of the AC power supply, and a second electrode; a rectifying circuit, which rectify an AC voltage applied to both capacitors; and a smoothing circuit, which smoothes the rectified AC voltage to generate a smooth voltage.
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