AD Vs BD Modulation in Class-D

[kees52]

You need cap between comparator inputs to force BD mode in post filter. Also place your CM inductor at the end of output towards load.

I get in ltspice simulation bd mode not right it is not visible just a fase shifted signal on both ends, when put a resistor over the outputs I get bd modulation but only see it in the current.

Maybe mine knowledge about ltspice is to limited.

I do now with triangles and offset it works fine, but these cause crossover unless I do overlap, this is critical.

regards

 

[kees52]

I sse this is old, I have in the meantime things done so it works, have now some experience.

regards