Title:
SWITCHING POWER SUPPLY APPARATUS, AND SEMICONDUCTOR DEVICE FOR CONTROLLING THEREOF
Document Type and Number:
WIPO Patent Application WO/2011/158282
Kind Code:
A1
Abstract:
Disclosed is a switching power supply apparatus, wherein a power supply can be restarted in stable state even upon momentary power interruptions such as power outages, enabling a stable power supply operation to be achieved. The switching power supply apparatus (100) is provided with: an overload protection circuit (22) that detects an overload state, and inhibits the amount of power to be supplied to a load (6); an output voltage detection circuit (error amplifier (11)) that detects the output voltage (VO) to be supplied to the load (6) via a transformer (3); and an overload protection function stopping circuit (the error amplifier (11), an output voltage detection comparator (31), a reference voltage source (32), and a maximum-duty detection circuit (10)) that detects the input voltage (VIN) supplied to a switching element (25), and stops the function of the overload protection circuit (22) for a period starting from when the detected input voltage (VIN) becomes equal to or less than a prescribed voltage, to when the output voltage detected by the output voltage detection circuit becomes equal to or more than a prescribed voltage.
Inventors:
FUKUI, Minoru (())
福井穣 (())
福井穣 (())
Application Number:
JP2010/003942
Publication Date:
December 22, 2011
Filing Date:
June 14, 2010
Export Citation:
Assignee:
PANASONIC CORPORATION (1006, Oaza Kadoma Kadoma-sh, Osaka 01, 〒5718501, JP)
パナソニック株式会社 (〒01 大阪府門真市大字門真１００６番地 Osaka, 〒5718501, JP)
FUKUI, Minoru (())
パナソニック株式会社 (〒01 大阪府門真市大字門真１００６番地 Osaka, 〒5718501, JP)
FUKUI, Minoru (())
International Classes:
H02M3/28
Attorney, Agent or Firm:
NII, Hiromori (6F Tanaka Ito Pia Shin-Osaka Bldg.,3-10, Nishi Nakajima 5-chome, Yodogawa-ku, Osaka-cit, Osaka 11, 〒5320011, JP)
Claims:
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