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:
Dec. 26, 2017
Filed:
Feb. 06, 2017
Alpha and Omega Semiconductor Incorporated, Sunnyvale, CA (US);
Zhiye Zhang, San Jose, CA (US);
ALPHA AND OMEGA SEMICONDUCTOR INCORPORATED, Sunnyvale, CA (US);
Abstract
A current detection circuit for detecting a current in a Switch Mode Power Supply (SMPS) having a first switch and a second switch coupled in series and an output filter including an inductor and a capacitor coupled to a switch node formed by the first and second switches, has a current sensing circuit for sensing a current across the second switch and generating a current sensing signal indicating current information of the second switch, and a current emulation circuit for emulating current information of the first switch. The current emulation circuit includes an inductance sensing circuit for acquiring a real-time rate of change in inductor current and an AC emulation circuit for computing the AC portion of the current information of the first switch based on the real-time rate of change in inductor current.