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:
May. 11, 2010
Filed:
Nov. 08, 2007
Ernest Henry Wittenbreder, Jr., Flagstaff, AZ (US);
Ernest Henry Wittenbreder, Jr., Flagstaff, AZ (US);
Other;
Abstract
The subject invention reveals new adaptive gate drive timing circuits that are optimal for both sufficient energy and insufficient energy conditions for optimal turn on transition timing of a power mosfet in a zero voltage switching power supply. The circuit does not rely on a rectifier connected to the drain of the power mosfet to detect the zero voltage condition of the mosfet. The circuit relies on the detection of a discharge current in a capacitance connected to the drain of the power mosfet. Turn on of the mosfet is held off while discharge current exists and the gate of the mosfet is enabled at the instant that the discharge current drops to zero. In one embodiment of the invention discharge current of the intrinsic gate drain capacitance of the mosfet is relied upon as the source of timing information.