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:
Sep. 24, 1996
Filed:
Jan. 29, 1993
Hiroshi Tachikawa, Koufu, JP;
NEC Corporation, Tokyo, JP;
Abstract
In a power supply control system including first through N-th power supply units for generating first through N-th output voltages, the first through the N-th power supply units producing first through N-th failure signals on occurrence of failure in the first through the N-th power supply units, respectively. A sequence control unit carries out a power on sequence which is for sequentially putting the first through the N-th power supply units into an on state in voltage increasing order of the output voltages and carries out a power off sequence which is for sequentially putting the first through the N-th power supply units into an off state in voltage decreasing order of the output voltages. A failure detection control unit, in response to one of the first through the N-th failure signals, simultaneously puts a specific unit of the first through the N-th power supply units that produces the one of the first through the N-th failure signals and the power supply units having the output voltages which are not lower than that of the specific unit into the off state and subsequently puts the power supply unit having the output voltages which are lower than that of the specific unit into the off state in accordance with the power off sequence.