High Voltage Seminar


1.1 The benefits of 650-V GaN FETs for 800-V power converters


March 29, 2021
With a better switching figure-of-merit, 650V GaN devices have demonstrated their benefits in power electronics converters with 400V DC link voltages and power levels up to 6.6 kW. However, there is an increasing need for high-voltage (>800V) and high-power (22 kW) converters in various industrial and automotive applications like solar inverters, test & measurement and HEV/EV powertrain on-board-chargers. How can 650V GaN devices be implemented in higher-voltage (>800V) DC link systems ? What competitive advantages can 650V GaN FETs bring over other 1200V devices in the market such as SiC MOSFETs and Si IGBTs in these systems ? You will walk away from this session with a deep understanding of GaN’s superior switching figure-of-merit (FoM) and learn about power architectures that cleverly leverage a 650-V device in >800-V converters. Measurements results of GaN’s switching FoM will be presented and compared to competition devices illustrating benefits in these converters.  Compelling reference designs of multi-level converters will be presented highlighting applicability in HEV/EV powertrain, grid infrastructure, test & measurement and power delivery end equipment.

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