Patent ID: 6826064
Filing Date: 2004-11-30
Classification: H02M

Abstract:
A stable voltage converter with multiple pulse width modulated channels, the converter comprising:a converter output having an average output voltage signal of the converter; an error amplifier inputting a reference voltage signal and the average output voltage signal, wherein said error amplifier compares the reference voltage signal and the average output voltage signal to generate an error signal; a plurality of subtraction circuits in parallel coupled with the error amplifier, wherein each of the subtraction circuits receives the error signal and a channel current signal, and generates a modified error signal; a plurality of converter channels, each of the converter channels coupled with one of the subtraction circuits, wherein each of the plurality of converter channels inputs the modified error signal and generates a direct current power output; and a plurality of current sensors, each of the current sensors coupled with one of the converter channel, wherein each of the current sensors measures the direct current power output and feeds back the channel current signal to the subtraction circuit coupled with the same converter channel.