Patent ID: 7102341

Claim:
An apparatus for controlling a switch module for effecting switched connection of an output locus with a rectifying module in a boost power converting device; said power converting device presenting an output signal at said output locus; the apparatus comprising: (a) a voltage error sensing unit coupled with said output locus; said voltage error sensing unit generating a voltage error signal representing a first difference between said output signal and a desired output signal; (b) an error conversion unit coupled with said voltage error sensing unit; said error conversion unit combining said voltage error signal with an integral of said voltage error signal to generate a calculated current signal; said calculated current signal indicating a calculated return current to said rectifying module; a periodic signal being employed for resetting said integral; (c) a comparing unit coupled with said error conversion unit and coupled with a current sampling locus in said power converting device for receiving a sample current; said comparing unit generating a drive signal when said calculated current signal and said sample current have a predetermined relationship; said drive signal controlling said switch module.