What is the DC Gain of this Flyback power stage transfer function?

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treez

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Hello,
The following equation (2A-22) , on page 232 of Basso's book (switch mode power supplies) is the small signal power stage transfer function for a buckboost converter, in current mode, CCM.

Please advise on what is the DC gain of this transfer function?

I am actually using it for a flyback (flyback is derivative of the buckboost) and my Ns/Np for the flyback is 0.837.


Pages 225, 226 explain what the parameters are
Pages 234, 235, explain how to convert equation 2A-22 for a flyback
Page 233 also shown as it shows the poles and zeros
 

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