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:
Oct. 07, 2025
Filed:
May. 22, 2023
Apple Inc., Cupertino, CA (US);
Vijay G Phadke, San Jose, CA (US);
Liang Zhou, Sunnyvale, CA (US);
Apple Inc., Cupertino, CA (US);
Abstract
An AC-DC power supply can include a PFC stage that receives a rectified AC input voltage and produces an intermediate DC bus voltage; a DC-DC stage that receives the intermediate DC bus voltage and produces a regulated DC output voltage; and a digital controller. The digital controller can include a relatively faster DC-DC stage controller that receives DC-DC stage feedback signal(s) and produces DC-DC drive signal(s) for switching device(s) of the DC-DC stage; a relatively slower PFC stage controller that receives PFC feedback signal(s) and produces PFC drive signal(s) for switching device(s) of the PFC stage; and control logic that receives periodic output power indications of the AC-DC power supply and uses them to cause the PFC drive signal(s) to respond to a change in output power of the AC-DC power supply more quickly than would be achieved by the relatively slower PFC stage controller.