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:
May. 31, 2022
Filed:
Jun. 30, 2020
Alpha and Omega Semiconductor International Lp, Sunnyvale, CA (US);
Prabal Upadhyaya, San Jose, CA (US);
Alpha and Omega Semiconductor International LP, Toronto, CA;
Abstract
A power stage in a multi-phase switching power supply incorporates a current sense transistor coupled in series with the output inductor to sense the phase current for the power stage. In some embodiments, the current sense transistor mirrors the output voltage disconnect transistor (the ORing FET) used to switchably connect a power stage to the output voltage node. The current sense transistor measures a portion of the inductor current flowing through the output inductor where the inductor current is indicative of the phase current of the power stage. Accurate current sensing is implemented for the power stage where the current sense value dose not require temperature compensation.