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. 02, 2012
Filed:
Dec. 17, 2009
Tod Schiff, Portland, OR (US);
Brian P. Johnson, Cedar Park, TX (US);
Tod Schiff, Portland, OR (US);
Brian P. Johnson, Cedar Park, TX (US);
Semiconductor Components Industries, LLC, Phoenix, AZ (US);
Abstract
A power supply converter and a method for adjusting a threshold voltage in the power supply converter. The circuit includes first and second switches having current conducting terminals commonly connected together to form a node. An energy storage element may be connected to the node and a zero current detection comparator may be connected to the node. A first voltage may be provided at the control terminal of the first switch that turns it off. After the first switch is off, determining whether the first switch turned off before or after the current in the energy storage element has reached zero. This may be accomplished by determining whether the voltage at the first node is positive or negative. If the voltage at the first node is negative, the threshold voltage is increased and if the voltage at the first node is positive the threshold voltage is decreased.