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:
Dec. 24, 2019
Filed:
Mar. 27, 2019
Omron Automotive Electronics Co., Ltd., Aichi, JP;
Lucretiu Pisau, Highland Park, IL (US);
Sudarshan Ravindran, Saint Charles, IL (US);
Srivatsan Jayaramasundaram, Naperville, IL (US);
Omron Automotive Electronics Co., Ltd., Aichi, JP;
Abstract
Safe detection of an external load attached to an AC power outlet of a power supply stands out as one advantage of the power supply apparatus and method contemplated herein, although other advantages flow therefrom. Not least among the other advantages are a simplicity of design offering an economical and robust mechanism for detecting external loads. The contemplated mechanism relies on the application of a DC voltage to one electrical phase of the AC power outlet and the coupling of that voltage to the other electrical phase of the AC power outlet through an interconnecting resistor. With both phases respectively coupled to voltage divider circuits nominally matched in value, the divided down voltages measured from the respective phases will differ in dependence on the relative size of the interconnecting resistor and the resistive value of any load attached to the AC power outlet.