Title:
スイッチング電源装置
Document Type and Number:
Japanese Patent JP5040268
Kind Code:
B2
Abstract:
A switching power supply device has a drive circuit that can minimize a loss while being compact. The drive circuit turns on and off a high-side switching element (MOSFET) according to a positive or negative voltage developed at a tertiary winding of a transformer. The drive circuit includes a control unit that detects the development time, during which the negative voltage is developed at the tertiary winding, as the on time of a low-side switching element, and makes the on time of the high-side switching element nearly or substantially equal to the development time.
Inventors:
Yukihiro Nishikawa
Application Number:
JP2006305197A
Publication Date:
October 03, 2012
Filing Date:
November 10, 2006
Export Citation:
Assignee:
Fuji Electric Co., Ltd.
International Classes:
H02M3/28
Domestic Patent References:
| JP2006109566A | ||||
| JP2006067700A |
Attorney, Agent or Firm:
Iwao Yamaguchi
Kiyoshi Matsuzaki
Kiyoshi Matsuzaki