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. 23, 2021
Filed:
Sep. 24, 2014
Texas Instruments Incorporated, Dallas, TX (US);
TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US);
Abstract
Example embodiments of the systems and methods of CCM primary-side regulation disclosed herein subtract an estimate of the secondary IR drop from each output voltage sample. This allows a fixed sample instant to be set (with regard to the beginning of the off or flyback interval), and removes the need to hunt for or adjust to an optimum sample instant, or one with minimum IR drop error. The estimate of the IR drop may be adjusted on a cycle-by-cycle basis, based on the commanded primary peak current, knowing that the peak secondary current will be directly proportional by the turns ratio of the transformer. For improved accuracy, an adjustment may be made for the decay of secondary current during the delay to the sample instant, if the inductance value is known.