Patent ID: 7282898

Claim:
An apparatus, comprising: an integrated circuit (IC) capable of generating a plurality of PWM signals to drive a plurality of DC-to-DC converter circuits, each said DC-to-DC converter circuit operating as a respective phase of a polyphase power supply to deliver polyphase power to a load, said IC comprising a plurality of feedback circuits corresponding to the number of said DC-to-DC converter circuits and a redundant feedback circuit, each said plurality of feedback circuits and said redundant feedback circuit is capable of receiving a respective feedback signal indicative of power supplied to at least one said phase, and each said plurality of feedback circuits and said redundant feedback circuit is further capable of generating a control signal to control the duty cycle of selected ones of said PWM signals; said IC is capable of decoupling at least one of said plurality of feedback circuits from said respective feedback signal and, in place thereof, coupling said redundant feedback circuit to at least one said respective feedback signal.