Title:
DC/DC CONVERTER
Document Type and Number:
WIPO Patent Application WO/2008/041666
Kind Code:
A1
Abstract:
Provided is a DC/DC converter wherein a target voltage from a reference voltage
source (15) can be changed by a control circuit (19). A PWM control circuit (21)
controls a first switching element (9) to operate to have an on/off ratio gradually
increase from the minimum on/off ratio upon start-up, a second switching element
(11) to turn off during such increase, the target voltage to be set higher than
the normal voltage, the second switching element (11) to start on/off operation
when the start-up ends, and the target voltage to return to the normal voltage.
Inventors:
YOSHIDA KOJI
HANDA HIROYUKI
MATSUO MITSUHIRO
AKIMASA KOJI
HANDA HIROYUKI
MATSUO MITSUHIRO
AKIMASA KOJI
Application Number:
PCT/JP2007/069161
Publication Date:
April 10, 2008
Filing Date:
October 01, 2007
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD (JP)
YOSHIDA KOJI
HANDA HIROYUKI
MATSUO MITSUHIRO
AKIMASA KOJI
YOSHIDA KOJI
HANDA HIROYUKI
MATSUO MITSUHIRO
AKIMASA KOJI
International Classes:
H02M3/155; H02M7/21
Domestic Patent References:
| WO2006006257A1 | 2006-01-19 |
Foreign References:
| JP2002218667A | 2002-08-02 | |||
| JP2002272097A | 2002-09-20 | |||
| JPH10225105A | 1998-08-21 | |||
| JP2006067692A | 2006-03-09 | |||
| JP3175227B2 | 2001-06-11 |
Other References:
See also references of EP 2071714A4
Attorney, Agent or Firm:
IWAHASHI, Fumio et al. (1006, Oaza Kadoma, Kadoma-shi Osaka 01, JP)
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