bjt totem pole gate driver not working with sawtooth wave

crutschow

Joined Mar 14, 2008
24,724
Since you want a ramp, is the IGBT used as an emitter follower to drive the inductive load?
That's different than using it as a switch, where you wouldn't drive it with a sawtooth.

You need to show us the exact circuit you expect to drive, otherwise we are just spinning our wheels. :rolleyes:
 

Alec_t

Joined Sep 17, 2013
11,144
Here's a simple sim of a totem pole stage like yours, to demonstrate that it can pass several Amps to/from the 8nF cap (if appropriate transistors are used), providing the switching speed is high enough. Here the rise and fall times are 10 nanoseconds.
TotemDemo.png
 

shortbus

Joined Sep 30, 2009
7,600
Since you want a ramp, is the IGBT used as an emitter follower to drive the inductive load?
That's different than using it as a switch, where you wouldn't drive it with a sawtooth.

You need to show us the exact circuit you expect to drive, otherwise we are just spinning our wheels. :rolleyes:
That's my take on his desire. Wouldn't it be better for him to do something like a class D amplifier, similar to how they do a modified sine wave inverter. Pretty sure from his history this has to do with a Tesla coil circuit in some way.
 
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