发明名称 |
POWER SUPPLY DEVICE AND IMAGE FORMING APPARATUS |
摘要 |
<P>PROBLEM TO BE SOLVED: To provide a power supply device and an image forming apparatus that implement improved efficiency in an energy saving standby mode. <P>SOLUTION: The power supply device for producing a DC voltage from an AC power supply comprises: rectifying/smoothing means connected to the AC power supply to rectify and smooth an AC voltage; a first DC-DC converter A for converting a DC voltage from the rectifying/smoothing means to output a first DC voltage; a second DC-DC converter B for outputting a second DC voltage lower than the first DC voltage through a switching action of switching means on receipt of the first DC voltage from the first DC-DC converter; and state transition means 746 for making a transition to a state in which the output voltage of the first DC-DC converter is reduced from the first DC voltage to a third DC voltage lower than the second DC voltage and the switching means of the second DC-DC converter is driven in a continuously conductive state. <P>COPYRIGHT: (C)2013,JPO&INPIT |
申请公布号 |
JP2013102689(A) |
申请公布日期 |
2013.05.23 |
申请号 |
JP20130029413 |
申请日期 |
2013.02.18 |
申请人 |
CANON INC |
发明人 |
HAYASHIZAKI MINORU;SAMEJIMA KEISUKE |
分类号 |
H02M3/28;G03G21/00;H02M3/155;H02M7/48 |
主分类号 |
H02M3/28 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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