I'm a Tesla enthusiast and build Tesla coils now and then. One thing I have always wondered, a lot of designs (some very popular) utilize a transformer to drive a N-MOS half bridge (see image below). My concern with this, and simulations have shown it to be true, shouldn't this type of a design result in a high amount of shoot though since there is no dead time incorporated?
With that being said, I would love to get away from bootstrapping my driver and forcing it to be sitting on the high voltage rails (debugging and inspection with a scope gets much easier). My problem is I do not see an easy way to incorporate dead time.
The only method I see to add dead time and have galvanic gate drives would be to use a full bridge driver to sink and source current to two independent drive transformers and hackishly bypassing the bootstrap drive tying it to vcc.
So my questions are:
- Do you agree with my assessment that for switching at 200khz, the design illustrated should have the bulk of its power losses due to shoot though?
- Does anyone see a way with to easily employ dead time with galvanic isolation without using a full bridge driver as explained above?