Patent ID: 7560914

Claim:
A power converter comprising: a first stage comprising a current source for generating a current signal; and a second stage comprising: n output circuits coupled to the current source for converting the current signal into n corresponding output voltages, wherein each of the n output circuits comprises an output switch responsive to a corresponding n th control signal for regulating the corresponding n th output voltage; and a controller for generating the n control signals comprising: for each of the n output circuits: an error amplifier configured to generate a duration control signal based upon a comparison of the output voltage of the n th output circuit and a corresponding n th reference voltage; and a pulse generator coupled to the error amplifier and configured to output the control signal to the switch of the corresponding n th output circuit, wherein the control signal is output responsive to a falling edge of a trigger input received by the pulse generator, and wherein a duration of the control signal is determined based upon a pre-determined output duration of the pulse generator and a value of the duration control signal; wherein the pulse generators are interconnected in a wrap-around configuration such that the falling edge of the control signal output by each pulse generator operates as the trigger input for a subsequent pulse generator.