Comments on: Updated: Novel bipolar device drops only 0.6V in 1.2kV 100A circuit breaker

By: Steve Bush

Fri, 03 Feb 2023 09:22:22 +0000

In reply to DB.

Morning DB
I have asked for more information on base driving, particularly cascode base driving.
20A 1.5V does not seem awful if it is saving more than a volt of drop at 100A through the device, but this seems to need a base drive that can see which way the polarity is across the device – or it will have to drive both bases – consuming 60W.

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By: DB

Fri, 03 Feb 2023 08:53:55 +0000

I am fascinated. This is not my area, though. Those base currents look high to me and I can see why they want to get the beta up. I would like to see how the efficiency compares for a typical system vs other solutions, rather than on the individual device level. Is anyone more familiar with the area able to do a back-of-the-envelope assessment?

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