Sharp Kabushiki Kaisha Corporation

Hiroki Kai

Akira Tamagaki

Akihiko Taniguchi

Kiyoshi Inoue

Takao Horiuchi

Junichi Kajiwara

Koichi Sumida

Yoshiomi Hamano

A power supply deviceincluding: a current sourcefor supplying current to a load circuitwhich operates on the supplied current, and a power switch unitbetween the current sourceand the load circuitto control passage of current, wherein: the power switch unitincludes a switching elementconnected in parallel with the open-close element, a power supply controllerincluding an open-close element controllerwhich controls operation of the open-close elementand a switching element controllerwhich controls operation of the switching element, and a voltage detectorwhich detects terminal voltage of the load circuit; and the power switch unitturns on the switching element before supplying current to the load circuit and closes the open-close element when the terminal voltage of the load circuit becomes almost equal to supply voltage.

Power supply device preventing inrush current

Growing community of inventors

Yamatokoriyama, Japan

Hiroki Kai