I'm trying to select a PWM controller to control external fets for a simple plasma arc eval circuit.
Application:
Very simple plasma arc eval circuit. PWM controller to controll 2 or more external low RSon NFETS or IGBTs. These switches will switch Vin on/off chopping current to the load (which is a plasma arc). I would think I don't need any fancy PWM controllers; I just need a reasonably robust and fast controller that is meant to drive external fets.
Requirements:
- Vin = 100V (only the fets will be exposed to this voltage)
- load current = 30A
- PWM controller that can toggle external high power fets at 500-800kHz and drive them on/off very quickly
My hope is to have a very simple PWM circuit with basic LC filtering + big smoothing inductors and use 500V+ rated fets to handle the large voltage ripples that will ensue. If there's a TI pwm eval board that I can hook up my external fets to, that would be nice.
Thanks in advance!