Patent ID: 7667349

Claim:
A DC-DC converter having a plurality of operating conditions for providing power to a load, the DC-DC converter comprising: a plurality of generating devices, wherein each generating devices is adapted to provide power to the load; a plurality of switches, wherein each switch is coupled between the load and at least one of the generating devices; a sensing unit coupled to the load that senses current through the load, wherein a sensed current through the load indicates at least one of the operating conditions, and wherein the sensing unit further comprises a comparator that receives the sum of a plurality of signals from the load and receives the sum of a plurality of signals from the generating devices; and a control unit including: a signal generator that is coupled to the sensing unit and that outputs a plurality of phase control signals; a level setting unit that receives a feedback current from the load; and a plurality of logic gates that are coupled to signal generator and the level setting unit, wherein the logic gates actuate two or more switches so that two or more generating devices substantially simultaneously provide the power to the load for at least one of the operating conditions.