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Registered Member #2292
Joined: Fri Aug 14 2009, 05:33PM
Location: The Wild West AKA Arizona
Posts: 795
Those are fast little IGBTs! Ive seen them used in the QCW before with great results.
About gate protection: If you are driving with a GDT you should have some sort of TVS or zener from gate to emitter to protect against voltages spikes cased by the leakage L in the GDT.
If you are using a dedicated Si driver then the TVS or zeners are not really needed, but a 10k pulldown resistor from gate to emitter is very important to have! The reason for this is if your driver circuity losses power while the gate is on the gate can "latch" on because of the parasitic SCR present in IGBTs. The pull down is there to shut the gate off in the event that the gate driver losses power.
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IGBT Modules and Gate protection
