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Gallium Nitride (GaN) power devices have been in volume production since March 2010 with remarkable field reliability. This article details how by testing parts to the point of failure an understanding of the amount of margin between the data sheet limits can be developed, but more importantly, an understanding of the intrinsic failure mechanisms can be found. By knowing the intrinsic failure mechanisms, the root cause of failure, and the device’s behavior over time, temperature, electrical or mechanical stress, the safe operating life of a product can be determined over a more general set of operating conditions.
Power Systems Design
March 3, 2020