Title:
SWITCHING POWER SUPPLY DEVICE
Document Type and Number:
WIPO Patent Application WO/2013/018787
Kind Code:
A1
Abstract:
Resonant capacitor (Cr) and inductor (Lr) are connected in series between the primary winding (L1) of a transformer (T1) and a second switching element (Q12). A first rectifying and smoothing circuit consisting of a first rectification switching element (Q21) and a capacitor (Co1) rectifies and smooths the voltage generated at a first secondary winding (L21) of the transformer (T1) to take out a first output voltage (Vo1). A second rectifying and smoothing circuit consisting of a second rectification switching element (Q22) and another capacitor (Co2) rectifies and smooths the voltage generated at a second secondary winding (L22) of the transformer (T1) to take out a second output voltage (Vo2). A control circuit (10) controls the on-time of a first switching element (Q11) and the on-time of the second switching element (Q12) on the basis of the first output voltage (Vo1) and the second output voltage (Vo2).
Inventors:
UNO YOSHIYUKI (JP)
Application Number:
PCT/JP2012/069423
Publication Date:
February 07, 2013
Filing Date:
July 31, 2012
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
UNO YOSHIYUKI (JP)
UNO YOSHIYUKI (JP)
International Classes:
H02M3/28; H02M3/335
Foreign References:
| JP2006320159A | 2006-11-24 | |||
| JPH07194107A | 1995-07-28 | |||
| JPH11308862A | 1999-11-05 | |||
| JPH04121181U | 1992-10-29 | |||
| JPH06303771A | 1994-10-28 |
Attorney, Agent or Firm:
Kaede Patent Attorneys' Office (JP)
Patent business corporation Kaede Patent Attorneys' Office (JP)
Patent business corporation Kaede Patent Attorneys' Office (JP)
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Claims:
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