Title:
CHARGING DEVICE
Document Type and Number:
WIPO Patent Application WO/2006/104195
Kind Code:
A1
Abstract:
There is provided a charging device capable of improving charging efficiency and reducing power consumption, thereby increasing a battery service life. The charging device charges a main capacitor (2) by rectifying output voltage boosted via a separately-excited DC-DC converter, by using a diode (D). The separately-excited DC-DC converter is configured as follows. When a current value (I1) flowing in a primary side (P) of an oscillation transformer (T) reaches a first predetermined value (IPK1), the excitation period is terminated and energy is transmitted from the primary side (P) to the secondary side (S) of the oscillation transformer (T) so as to execute a charging period for charging the main capacitor (2). The excitation period is resumed with a delay time (t1) after detecting that the current value (I2) flowing into the secondary side (S) of the oscillation transformer (T) is lowered than a second predetermined value (Ith2).
Inventors:
HOSHIKAWA HISANORI (JP)
TAMEGAI YOUICHI (JP)
YAMAMOTO ISAO (JP)
TAMEGAI YOUICHI (JP)
YAMAMOTO ISAO (JP)
Application Number:
PCT/JP2006/306467
Publication Date:
October 05, 2006
Filing Date:
March 29, 2006
Export Citation:
Assignee:
PANASONIC PHOTO & LIGHTING CO (JP)
ROHM CO LTD (JP)
HOSHIKAWA HISANORI (JP)
TAMEGAI YOUICHI (JP)
YAMAMOTO ISAO (JP)
ROHM CO LTD (JP)
HOSHIKAWA HISANORI (JP)
TAMEGAI YOUICHI (JP)
YAMAMOTO ISAO (JP)
International Classes:
G03B15/05; G03B15/03; H02M3/28; H05B41/32
Foreign References:
| JP2003079147A | 2003-03-14 | |||
| JPH1155944A | 1999-02-26 | |||
| JPS54144922A | 1979-11-12 |
Attorney, Agent or Firm:
Morimoto, Yoshihiro (4th Floor 10-10, Nishi-Hommachi 1-chome, Nishi-k, Osaka-shi Osaka 05, JP)
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