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:
Feb. 18, 2014
Filed:
Nov. 09, 2009
Brett E. Etter, Austin, TX (US);
Brett E. Etter, Austin, TX (US);
Cirrus Logic, Inc., Austin, TX (US);
Abstract
A power control system reduces power losses by utilizing an over current protection method that detects an over current event based on a power utilization factor Pand an output voltage of an output stage of the power control system. In at least one embodiment, the power control system detects the over current event without sensing an output current in an output stage of the power control system. Since the output current is not sensed, the power control system avoids power losses otherwise associated with sensing the output current. The power control system includes a power factor correction (PFC) stage and an isolation stage. A controller determines the power utilization factor Pusing voltages sensed from the PFC stage. In at least one embodiment, the controller responds to the over current event by entering an over current protection mode.