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. 26, 2009
Filed:
Aug. 13, 2008
Seamus O'driscoll, Cloyne, IE;
Plotr Markowski, Worcester, MA (US);
Seamus O'Driscoll, Cloyne, IE;
Plotr Markowski, Worcester, MA (US);
Artesyn Technologies, Inc., Boca Raton, FL (US);
Abstract
A power converter is disclosed. According to one embodiment, the power converter includes a first stage including a current source for generating a current signal, and a second stage. The second stage includes n output circuits coupled to the current source for converting the current signal into n corresponding output voltages. Each of the n output circuits includes an output switch responsive to a corresponding ncontrol signal for regulating the corresponding noutput voltage. The second stage further includes a controller for generating the n control signals. The controller includes, for each of the n output circuits, an error amplifier, a waveform generator, and a summing circuit. Each error amplifier generates an output signal based upon a comparison of the output voltage of the noutput circuit and a corresponding nreference voltage. Each waveform generator generates a waveform signal. The waveform signals for the n output circuits are characterized by a common amplitude and period, and the phases of the waveforms signals are spaced at predetermined intervals. The summing circuit sums the output of the error amplifier and the waveform signal to generate an amplitude-shifted waveform signal. The controller further includes a comparator circuit for outputting the n control signals to the output switches based upon a comparison of the relative amplitudes of the amplitude-shifted waveform signals.