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. 11, 2001
Filed:
Dec. 16, 1999
Praveen Kumar Jain, Kanata, CA;
ChipPower.com, Inc., Nepean, CA;
Abstract
An AC/DC converter for outputting high current, low voltage output from a high frequency AC source is described. The AC/DC converter includes two resonant components, a resonant circuit having a capacitor and an inductor. Both of the resonant components are connected in series and form a series resonant circuit. The converter further includes a transformer having a primary winding with a center tap to a secondary winding. The resonant circuit and the primary winding are connected in series. The center tap is connected to an output filter and a load, while the other two ends of the secondary winding are connected to two controlled switches, respectively. A drain of each of the two controlled switches is connected to opposite ends of the secondary winding, while each of the sources of the two controlled switches are interconnected. Two anti-parallel diodes are respectively connected across the two controlled switches. Two capacitors are also respectively connected across the two controlled switches. The on-time of the controlled switches is regulated to control the output voltage of the converter. The advantage is an inexpensive converter adapted to output high currents at low voltages with very little ripple and very low slew rate.