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:
Jun. 17, 2014
Filed:
Jun. 16, 2011
Michael M. Walters, Apex, NC (US);
Michael M. Walters, Apex, NC (US);
Intersil Americas Inc., Milpitas, CA (US);
Abstract
A converter according to one embodiment converts an AC voltage to a regulated output current provided to a DC load of a Z-type configuration. A filter capacitor is provided to average current flowing through the load. The converter includes a rectifier network for rectifying the AC voltage and for providing a rectified voltage, and a smoothing capacitor for smoothing the rectified voltage. The converter includes a hysteretic current mode controller which controls a switching transistor based on sensed voltage and sensed current provided through an inductor coupled in series with the load. The transistor is turned on when current reaches a low valley level and is turned off when the current reaches a peak level. Operation toggles in this manner while a sensed voltage is above a predetermined level. A valley fill network may be provided to keep sensed voltage from falling below the predetermined minimum level.