Hello Sir GKmaia,
Recently I am doing similar project on a Class D amplifier used to run a potential and a current transformer.
The transformer input and output impedance need to be calculate. Interesting to see its " phase shift" behavour at high or low frequency.
People also curious about" core saturation" effect.
"A product with a Class-D audio power amplifier (APA) driving an output transformer with inadequatelow-frequency performance may shut down when its output is stepped from zero to maximum at the start of a sine cycle. Shutdown is triggered by short circuit protection (SCP), after the first half cycle of the sine output. The root cause is saturation of the transformer core."