L6562N & TSM101AC Transfer Function Problem

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saeidjabbari

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Hi for all
Dose Transfer Function equations is correct?
I want to design LED Driver based on L6562N and TSM101AC but i have 2 problems:
1. OVP dose not work at NO LOAD!
2. Output voltage ripple is very noisy!
I think reason of problems is transfer function!

 

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