Gate drive summary
Cascode GaN:
– Standard FET gate driver compatibility
– Lower Qg for given current-handling capability
– ZVS turn-off easier to achieve
Enhancement-mode GaN
– Low threshold, noise sensitivity, negative drive can help
– Tighter limits on Vgs
– Very low Qg
– Kelvin source connection mandatory
– Floating driver helpful especially at higher power
APEC 2015 Seminar S17
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