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« on: June 14, 2022, 0247 UTC »
Your not reading again stretchy. I am talking about 1700v devices with 80mOhm RDSon...not 900v devices at 280mOhm.
The current rig has run up to 10 Mhz. I have little interest in anything much above that as I don't operate during the day. Bolt on fet drivers are used to deal with the gate capacity. I will explore GaN when the price performance ratio gets more attractive. For now Sic makes more sense in my topologies and power levels. If they come out with comparable high voltage GaN devices at a reasonable price, I'll consider it.
I like my current approach as it affords high power with a simple low cost PA architecture. There are ways to get similar power with lower voltages, but circuit complexity, the headache of ferrite, high current losses, etc start to make things unnatractive for my needs.
SiC devices have made what I'm doing possible at much lower cost, and simpler design than was possible just a handful of years ago. GaN for the moment, does not hold the same advantages.
+-RH