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. 28, 2008
Filed:
Sep. 23, 2003
Applicant:
Francois Lhermite, Lasserre, FR;
Inventor:
Francois Lhermite, Lasserre, FR;
Assignee:
Semiconductor Components Industries, L.L.C., Phoenix, AZ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02M 3/335 (2006.01);
U.S. Cl.
CPC ...
Abstract
A power supply controller () uses a negative current () of a power transistor () to detect the valley point for enabling the power transistor when driving an inductor (). The negative current occurs when the inductor is de-magnetized and can be used for controlling the time to enable the power transistor.