I've never used MOSFET drivers before and I've been bamboozled by the advice that is out there to the point that I don't know what's happening anymore!
I've attached a diagram of my circuit: the N-Channel MOSFET is a STP15N95K5 and the P-Channel is a IXTX32P60P. Its purpose is to turn on/off coupling between the transformer windings such that energy can be taken out of the driven, resonant side and dump to ground.
This is what I want:
| TTL input | N-Channel Gate potential | P-Channel Gate potential |
|---|---|---|
| 0.0 V | ≤ 0.0 V | ≥ 0.0 V |
| 3.3 V | +12.0 V | -12.0 V |
In operation to the TTL will normally be low but will high for a few microseconds after a strong (hundreds of volts) RF pulse on the driven side of the transformer. Ideally the MOSFETs should open as quickly as possible but shut gently.
At the moment I am doing something weird and unorthodox with op amps but the circuit is destroying them and I concede it was a bad idea.
I would be extremely grateful for any advice in terms of control circuit design (especially MOSFET driver recommendations) and please understand I'm not really au fait with MOSFETs!
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