Title:
スイッチング電源装置
Document Type and Number:
Japanese Patent JP4862432
Kind Code:
B2
Abstract:
Disclosed is a synchronous rectification type switching power supply apparatus, including: a transformer that receives input voltage on a primary side; a switching element that is to be turned on or off for rectifying current of a secondary coil of the transformer; a control circuit to drive the switching element. The control circuit includes a first timing detection circuit to detect first timing at which forward current flows through a body diode of the switching element, and a second timing detection circuit to detect second timing with counter electromotive voltage that is generated at an instant when the body diode is turned off. The control unit is to generate an on/off control signal for the switching element to turn on the switching element at the first timing, to turn off the switching element before the second timing and to bring off-timing of the switching element close to the second timing.
Inventors:
Koji Emura
Naoto Endo
Naoto Endo
Application Number:
JP2006052388A
Publication Date:
January 25, 2012
Filing Date:
February 28, 2006
Export Citation:
Assignee:
MITSUMI ELECTRIC CO.,LTD.
International Classes:
H02M3/28; H02M7/21
Domestic Patent References:
| JP10066336A | ||||
| JP9163736A | ||||
| JP2002330538A | ||||
| JP2004173480A | ||||
| JP7337005A | ||||
| JP2006262566A |
Attorney, Agent or Firm:
Hiroshi Arafune
Yoshio Arafune
Yoshio Arafune