I have recently heard of comparators that have push pull outputs, could they be used as an IGBT driver? Also, does anyone have any part numbers for these types of comparators?

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Metal-Oxide-Semiconductor Flame Effect Transistor

 

Hi MOSFET KILLER, the LM393 and LM339 are two that have what your looking for.

BUT I would never use them as gate drivers! They DON'T have enough current to turn on a gate fast enough! The mosfet would spend too much time in transition and run hot.

Cary

 

Isn't the LM393 an open collector output?
I have several LM393 comparators, is there a way to use the open collector to drive a pair of HGTG30N60B3D IGBTs?
I have a nearly unlimited supply of low power BJTs but like you said I am going to need a large current to turn the IGBTs on.
Would it be a good idea to bias the gate of the IGBT during turn off, to switch more efficently.

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Metal-Oxide-Semiconductor Flame Effect Transistor

 

Use a proper driver chip. Or build one out of discrete components. The current requirements are way beyond op amps capabilities.

 

Ok, so I will use a pull-up on the comparator and that signal to drive the base of a transistor inverter that will turn on the IGBTs and bias them on turn off.
Or is there a better way to drive the IGBTs using discrete components.

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Metal-Oxide-Semiconductor Flame Effect Transistor

 

If you have to use discrete components, build a totem pole driver. This is probably the most efficient for switching MOSFETS/IGBTs.

It's much simpler to just buy a driver chip though. They are not expensive and usually have a lot more features in them than just the driver circuitry.