The operation of a quasi resonant converter is dependent to the primary inductance of the transformer, stray capacitance of the circuit (mostly on the primary switch), reflected voltage to the primary winding during flyback action, turns ratio of the transformer, and the given voltages like input voltage, output voltage, output power and intended frequency of operation.
For a beginner or not technical person, these are too much to handle. It will take time even for a technician or an inexperienced engineer to digest all these. However, you don’t need to extend extra effort anymore. There is already a Quasi resonant flyback operation checker and design tool available.
