Thanks for including your .asc file; it runs on my PC. However, you have mislabeled the 18V DC power source as 25V. Confusing.The totem pole works fine square waves but not sawtooth. The capacitor should have a few amps peak in it but that only happens with the sqaure wave input.
This totem pole wont work for driving large igbt gates. They should be able to output large peak currents into a capacitive loads.As Alec noted, it's the fall-time of you signal.
The peak capacitor discharge current is determined by the rate of change of the signal.
If the capacitor voltage changes essentially as fast as the input signal to the driver, then the driver is doing its job.
We seem to going in circles here.This totem pole is made of 5amp DC BJTs and it cant put =>2 amps peak into a small 8nf capacitor. It should be able to put much greater peak currents than its 5amp rating.
You sound like a broken record (go ahead and ask what's a record), repeating the same thing as if you have no comprehension.This totem pole doesn't supply the peak current.
You are still dealing in generalities.Switching losses would be high for =>100nC IGBTs using only the ramp generator without delivering peak current into gate of IGBT.
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by Jake Hertz
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