Power supply with uninterruptible function

• US 6,795,322 B2
• Filed: 12/22/1999
• Issued: 09/21/2004
• Est. Priority Date: 12/25/1998
• Status: Expired due to Term

• Current Assignee: Hitachi Information & Telecommunication Engineering, Ltd. (Hitachi, Ltd.)
• Original Assignee: Hitachi Computer Peripherals Company Limited (Hitachi, Ltd.), Hitachi, Ltd.
• Inventors: Onda, Kenichi, Masuyama, Satoru, Tokunaga, Norikazu, Onaka, Takeshi, Zemba, Shigekazu, Aihara, Nobuyuki
• Primary Examiner(s): Sherry, Michael
• Assistant Examiner(s): Laxton, Gary L.
• Application Number:
  US09/469,619
• Publication Number:
  US 20020071292A1
• Time in Patent Office: 1,735 Days
• Field of Search: 307/44-46, 307/48, 307/64, 307/66, 307/80, 363/65, 363/71, 363/34, 363/37, 363/39
• US Class Current: 363/37
• CPC Class Codes: H02J 9/061 for DC powered loads

Abstract

A power supply provided with: an AC/DC converter which receives AC power, converts the AC power into DC power, and outputs the DC power; a DC/DC converter which receives the DC power from the AC/DC converter, and controls a level of an output voltage of the DC/DC converter to be equal to a level of a voltage to be used by a load while the DC/DC converter supplies the output voltage to the load; a DC converter which is connected to an input of the DC/DC converter; and a DC power storage device which supplies electric power to the DC/DC converter through the DC converter.

Claims