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:
Mar. 06, 2001
Filed:
Feb. 15, 2000
Kouichi Ueki, Saitama, JP;
Shigenori Kinoshita, Tokyo, JP;
Fuji Electric Co., Ltd., Kawasaki, JP;
Abstract
A non-insulating DC—DC converter is formed of a first semiconductor switching element for reducing a DC voltage from a high-voltage battery, a control circuit connected to the first semiconductor switch element for controlling pulses relative to the first semiconductor switching element, a second semiconductor switching element provided on an output side of the first semiconductor element, a capacitor connected between the first and second semiconductor switching elements in parallel, and a first control circuit connected to one end of the capacitor and an output side of the second semiconductor switching element. The first control circuit detects a voltage at the one end of the capacitor and a voltage on the output side of the second semiconductor switching element, and turns off the second semiconductor switching element if an overvoltage occurs at the one end of the capacitor. The damage of the internal elements due to an overvoltage or a reverse current is prevented.