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Title:
POWER SUPPLY DEVICE
Document Type and Number:
Japanese Patent JP2012231557
Kind Code:
A
Abstract:

To provide a power supply device that can bring a ripple current equal to or lower than a tolerance regardless of input voltage.

In a power supply device, a switching frequency is calculated based on a current detected by a current detector 5 such that a low switching frequency is set when the current is large and a high switching frequency is set when the current is small. A high switching frequency is set when the input voltage to an input terminal 1 is high, and a low switching frequency is set when the input voltage is low. A switching element 2 is controlled while regulating the switching frequency such that the switching frequency set based on the current detected by the current detector 5 is not lower than the switching frequency set based on the input voltage.


Inventors:
DAIGO TORU
KIHARA NOBUHIRO
ITOI NAOKI
Application Number:
JP2011097000A
Publication Date:
November 22, 2012
Filing Date:
April 25, 2011
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORP
International Classes:
H02M3/155
Domestic Patent References:
JP2004328834A2004-11-18
JP2010178608A2010-08-12
JP2008509643A2008-03-27
JP2006187159A2006-07-13
JP2009273324A2009-11-19
JP2005287275A2005-10-13
JP2002223562A2002-08-09
JP2006271089A2006-10-05
JP2006174571A2006-06-29
JPH10327575A1998-12-08
Attorney, Agent or Firm:
Masuo Oiwa
Toshihide Kodama
Takenaka Ikuo
Keigo Murakami



 
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