Hi all,

In current programmed control of power-converters, the converter will oscillate when the duty is > 0.5 if not slope-compensated. They say, it will will oscillate at one-half of the switching frequency.

My questions are...
x) what parameter of the converter (namely inductor current, output-voltage..etc..) will start oscillating at that frequency?

y) Normally, the response of any network consists of sum of the natural response and a forced response. Usually, natural response will die-out with time and only forced response remains. But, are there any systems, even for some particular or peculiar combinations of network parameters, where in the natural response will cause the system to oscillate for a small-disturbance in spite there is a forced function?

Thanks,

Bye,
Anil