I have a further doubt on this topic, hope you could be so kind to resolve it.
I have understood that when there is a small imbalance in the push-pull transformer primary windings or in traces impedance, the resistance of the output switch sinking higher power will increase and the balance is restored.
What happens if one of the two transformer in parallel (T1) has the two primary perfectly matched but the other (T2) has a mismatch? Does the RDS positive temperature coefficient of the switches creates an imbalance in the flux of the transformer T1 which has the two primary perfectly matched?
Is there a minimum matching requirement on windings to be requested to the Transformer manufacturer?
Thanks in advance for what you can answer.