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:
Oct. 29, 2002
Filed:
Apr. 09, 2001
Applicant:
Inventor:
Yukihide Niimi, Chita-gun, JP;
Assignee:
Denso Corporation, Kariya, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02H 3/087 ;
U.S. Cl.
CPC ...
H02H 3/087 ;
Abstract
An electrical load driving device is constructed to accurately detect an over-current state in either a high-side output mode or a low-side output mode irrespective of voltage fluctuations of a load power supply. The over-current is detected by a detection voltage which decreases from a battery voltage in proportion to a current flowing through an output transistor being compared with a determination voltage in the high-side output mode. It is detected by a second detection voltage which increases from a ground potential in proportion to the current flowing through the output transistor being compared with a determination voltage in the low-side output mode.