Title:
【発明の名称】DCーDCコンバータ
Document Type and Number:
Japanese Patent JP3336995
Kind Code:
B2
Abstract:
A DC-DC converter has a main switching element provided on the primary side of a transformer, a drain to source path of a synchronous rectifier on a rectification side comprising a MOSFET which switches in synchronism with the switching operation of the main switching element disposed on a line connecting one terminal side of the secondary coil of the transformer with an output terminal of a circuit on the secondary side of the transformer, and a gate of the synchronous rectifier on the rectification side connected so as to have applied thereto a voltage corresponding to an output voltage of the secondary coil via an input capacitor on the rectification side, so that a voltage generated on the primary side by switching operation of said main switching element is transmitted to the secondary side to be rectified and smoothed to output a DC voltage. A series circuit including a diode and a charge accumulating capacitor has the forward direction of the diode from the gate to source of the synchronous rectifier and is connected between the gate and source of the synchronous rectifier and a discharge device for the charge accumulating capacitor is connected in parallel with the charge accumulating capacitor.
Inventors:
Atsushi Nagai
Masahiko Matsumoto
Masahiko Matsumoto
Application Number:
JP12352699A
Publication Date:
October 21, 2002
Filing Date:
April 30, 1999
Export Citation:
Assignee:
MURATA MANUFACTURING CO.,LTD.
International Classes:
H02M3/28; H02M3/335; (IPC1-7): H02M3/28
Domestic Patent References:
| JP951260A | ||||
| JP984337A | ||||
| JP11150948A |
Attorney, Agent or Firm:
Kiyoshi Igarashi