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. 28, 2022
Filed:
Oct. 14, 2020
Gan Systems Inc., Ottawa, CA;
Yajie Qiu, Kanata, CA;
Xuechao Liu, Kanata, CA;
GaN Systems Inc., Kanata, CA;
Abstract
A circuit for a multi-voltage input AC/DC charger, such as a Universal AC input AC/DC charger, is provided, comprising a plurality of capacitors having different voltage ratings that are connected in parallel, and a switching circuit comprising input voltage sensing and comparator drive circuitry, to allow for selective connection of one or more of the plurality of capacitors, responsive to a sensed input voltage. Since bulk capacitors occupy a significant proportion of the volume of an AC/DC charger, this solution provides for a reduction in system volume, with associated improvement in the power density of an isolated AC/DC charger.