Patent ID: 7151362

Claim:
A power system for providing a system output voltage from an input voltage, the system comprising converters with parallel-input connections for receiving the input voltage providing an input current and with series-output connections for providing a series of successive respective voltage levels between ground and the system output voltage, the converters providing successive respective output voltages that are summed together by the series-output connections for providing the system output voltage, the converters have respective control ports for controlling the successive respective output voltages, and a controller for receiving the successive respective voltage levels from each of the converters and for providing respective converter control signals communicated to the respective control ports for controlling the successive respective output voltages and for maintaining the system output voltage at a predetermined voltage with each of the converters contributing to the system output voltage by the respective output voltages, the controller generating one or more difference signals from the successive voltage levels, the difference signals equaling to the successive respective output voltages, the controller generating one or more error signals from the one or more difference signals and one or more distribution reference signals, the one or more distribution reference signals controlling power contribution of the converters.