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:
Jun. 13, 2017
Filed:
Nov. 21, 2013
Active-semi, Inc., Road Town, Tortola, VG;
James A. Kohout, Dallas, TX (US);
Active-Semi, Inc., , VG;
Abstract
Apparatus and methods are provided to automatically detect and control a load switch for a wireless power receiver. In one novel aspect, a method is provided to adaptively control the load switch based on the output condition of a rectified output according to a predefined criteria. In one embodiment of the invention, the methods to adaptively control the load switch comprises a first stage that turns on the load switch quickly; a second stage that stops turning on the load switch and holds the load switch at its current value; a third stage that slowly pulls down the load switch; and a fourth stage that quickly turns off the load switch. In another embodiment, an integrated circuit for a wireless power pick up unit is provided to control the load switch adaptively based on a rectified output feedback and a predefined criteria.