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:
Sep. 24, 2024
Filed:
Jul. 26, 2022
Apple Inc., Cupertino, CA (US);
Bogdan T Bucheru, Lakeway, TX (US);
Joao L Andres, Austin, TX (US);
Marco A Davila, Jr., Spicewood, TX (US);
Apple Inc., Cupertino, CA (US);
Abstract
A power converter can include an input PFC stage that receives a rectified input voltage coupled to a flyback stage including a center-tapped primary winding magnetically coupled to a secondary winding and a main switch coupled in series with the primary winding. The output of the PFC stage can be coupled to the center tap of the primary winding, and an output of the power converter can be coupled to the secondary winding of the flyback stage. The converter can further include control circuitry coupled to the main switch and an auxiliary switch in the PFC stage that operates the main switch to regulate an output voltage of the power converter, selectively enables the auxiliary switch responsive to a low line voltage condition at the input of the power converter, and operates the enabled auxiliary switch synchronously with the main switch.