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#### treez

##### Guest

This is about SMPS feedback loop theory of offline flyback ...

Page 9 of the following application note offers us to find the "control-to-output-transfer function" [CtO]. Is that regarded as being the power stage transfer function in cascade with the modulator transfer function?...or just the power stage transfer function on its own?

I ask because the modulator transfer function is the parameter "K" on page 9....

In expression (33), the parameter "K" is included, and this is for CtO for the CCM flyback. In expression (34), the parameter "K" is not included, and this is the expression for CtO for the DCM flyback.

Why is "K" not included for the DCM flyback?

Application Note: