Title:
スイッチング電源回路、及びＬＥＤ照明装置
Document Type and Number:
Japanese Patent JP5770364
Kind Code:
B2
Abstract:
A flyback-type switching power supply circuit provided with a transformer including a primary coil and a secondary coil, and a switching element connected to the primary coil, comprising: a multiplying circuit for multiplying a first value obtained by multiplying the on-duty ratio of a secondary current flowing to the secondary coil by a predetermined first constant, and a second value obtained by multiplying the peak value of a primary current flowing to the primary coil by a predetermined second constant; and a switching control circuit for controlling switching of the switching element so that the result of multiplication by the multiplying circuit and a third value obtained by multiplying a reference voltage by a predetermined third constant match; and the flyback-type switching power supply circuit is configured so that at least one of the first constant, the second constant, and the third constant is variable by an external signal.
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Inventors:
Hideyuki Imanaka
Fujiyama Toshiya
Ryota Takahashi
Yasuo Baekje
Fujiyama Toshiya
Ryota Takahashi
Yasuo Baekje
Application Number:
JP2014507817A
Publication Date:
August 26, 2015
Filing Date:
March 22, 2013
Export Citation:
Assignee:
Sharp Corporation
International Classes:
H02M3/28; H01L33/00; H02M1/00; H05B37/02; H05B44/00
Domestic Patent References:
| JP2010081779A | ||||
| JP2010288334A | ||||
| JP4108386U | ||||
| JP2005086886A | ||||
| JP59050772A | ||||
| JP2011244619A |
Attorney, Agent or Firm:
Sano patent office