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:
Aug. 20, 2019
Filed:
Aug. 23, 2017
Apple Inc., Cupertino, CA (US);
Dashun Xue, Austin, TX (US);
Apple Inc., Cupertino, CA (US);
Abstract
Systems, apparatuses, and methods for efficiently generating a stable output voltage for one or more components are described. In various embodiments, current sensing circuitry within a power converter includes one or more current mirrors in addition to at least a first resistor, a second resistor, a switch and a bias current source. The sizes of these latter components scales the sensing current output of the current sensing circuitry from a value of an inductor current flowing through the low pass filter output of the power converter. In addition, the sizes generate an offset which maintains the sensing current as a positive value even when the inductor current becomes a negative value. The boosted sensing current makes a zero detection function and a protection function for the power converter relatively simple with current comparisons.