Abstract: Control circuitry for providing a control signal in a pulse width modulating regulating power converter wherein an output parameter delivered by the converter is regulated by pulse width modulation of current within the converter, including circuitry for receiving a sensed output parameter of the converter; circuitry for deriving therefrom an analog average current demand signal corresponding to a current that would bring the converter into regulation; circuitry for receiving a sensed present value of the current within the converter to provide an analog signal representative thereof; circuitry for differencing the average current demand signal and the analog signal to provide an error signal; a compensator arranged to average the error signal to provide a second error signal; a sawtooth generator providing an analog signal as a pulse width modulation ramp; and a comparator to which the ramp is applied to generate the control signal at the output thereof.