The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 28, 2010
Filed:
Mar. 29, 2006
Hisanori Hoshikawa, Osaka, JP;
Kyoichiro Araki, Kanagawa, JP;
Isao Yamamoto, Kanagawa, JP;
Youichi Tamegai, Kanagawa, JP;
Hisanori Hoshikawa, Osaka, JP;
Kyoichiro Araki, Kanagawa, JP;
Isao Yamamoto, Kanagawa, JP;
Youichi Tamegai, Kanagawa, JP;
Panasonic Photo & Lighting Co., Ltd., Osaka, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
A discharging device capable of realizing a proper PWM drive by accurately reflecting, as a strobe device, the secondary-side condition of a separately-excited strobe charging circuit being charged. A charging device which charges a main capacitor () via a separately-excited DC/DC converter and discharges the energy of the main capacitor, wherein a pulse width control circuit () for controlling a conduction pulse width on the primary side of the separately-excited DC/DC converter is provided, and this pulse width control circuit is configured such that a PWM soft start drive is performed that expands a conduction pulse width on the primary side of the separately-excited DC/DC converter stepwise up to a maximum pulse width.