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. 08, 2026
Filed:
Jul. 27, 2023
Apple Inc., Cupertino, CA (US);
Yantao Song, Northville, MI (US);
Abby Cherian, Fremont, CA (US);
Qianlai Zhu, San Jose, CA (US);
Joselito D Parayno, San Jose, CA (US);
Bharat K Patel, San Martin, CA (US);
Apple Inc., Cupertino, CA (US);
Abstract
A power supply can include a bulk capacitor that receives a DC bus voltage; one or more DC-DC converters that convert the DC bus voltage to a DC output voltage; an inrush current limiting circuit that includes a resistor coupled in series with the bulk capacitor so as to limit an inrush current to the bulk capacitor; and a solid-state switching device that selectively bypasses the resistor once the bulk capacitor is charged; and control circuitry that operates the solid-state switching device to selectively bypass the resistor once the bulk capacitor is charged. The inrush current limiting circuit can further include a relay responsive to the control circuitry that selectively bypasses the resistor under high load conditions once the bulk capacitor is charged; and the control circuitry can further operate the solid-state switching device to selectively bypass the resistor once the bulk capacitor is charged under low load conditions.