Patent ID: RE40593

Claim:
A multi-phase DC/DC converter having an output voltage, said converter comprising: a plurality of converter channels, each of said plurality of converter channels including a converter channel input and a converter channel output, each of said plurality of converter channels being configured for generating a converter channel current and for adjusting said converter channel current in response to a control signal electrically connected to each said converter channel input; a control circuit, comprising: means for generating an error signal, said error signal being representative of a comparison of said output voltage to a reference voltage; a plurality of control circuit channels, each of said plurality of control circuit channels corresponding to one of said plurality of converter channels, each of said plurality of control circuit channels comprising: means for generating a channel current signal, said channel current signal being representative of a corresponding converter channel current; means for generating a differential channel current signal, said differential channel current signal being representative of a comparison of said channel current signal to an average current signal, said average current signal being representative of an overall average current for said plurality of converter channels; means for generating a differential error signal, said differential error signal being representative of a comparison of said error signal to said differential channel current signal; and a pulse width modulator having a ramp input and a control input, said control input being electrically connected to said differential error signal, said pulse width modulator configured for generating said control signal, said control signal being based at least in part upon said differential error signal, said control signal being electrically coupled to a corresponding said converter channel input; and means for generating said average current signal.