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SMPS zero gain crossover frequency

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eem2am

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hello,

i have just designed an smps, an offline one transistor forward converter at 50W

I want to know the limit frequency above which i should not set the Zero Gain Crossover Frequency.

Is it true that the way to do this, is to just avoid using any compensation at components at first, and leave it to go onto full load,

-then look at what frequency the output voltage is oscillating at.

-that frequecy is the maximum possible Zero gain crossover frequency...and in fact i should go for some 80% of that frequency for crossover ?
 

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