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A fly-back converter operates in DCM output voltage relation with switching frequency

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Datsam

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A fly-back converter operates in discontinuous conduction mode with fixed ON duration of
the switch in each switching cycle. Assuming input voltage and the resistive load at the
output to remain constant, how will the output voltage change with change in switching
frequency? (Assume discontinuous conduction through out and neglect circuit losses.)

(a) Output voltage varies directly with switching frequency.
(b) Output voltage varies inversely with switching frequency.
(c) Output voltage varies directly with square root of switching frequency.
(d) Output voltage is independent of switching frequency.
 

discontinuous conduction mode
...
fixed ON duration
...
how will the output voltage change with change in switching frequency?

This is similar to performing more cycles per second, where each cycle lets a fixed amount of Amperes build in the primary. Thus you inject a greater number of energy packets into the converter per second.

Seen in this fashion, which of the choices A through D seems most likely? Have you tried making your own simulation of a flyback?
 
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