Challenges Involved in Designing a Linear MOSFET Driver Stage

In the process of designing a linear driver stage to use as a a load, I came across this thread on the EE stackexchange detailing one guy’s design process and lessons learned doing this exact thing.

I’ve ended up using the STP75NF75 because it was the part that didn’t crater during testing. Since most MOSFETS are designed as switches making them operate in linear mode takes some doing.

The whole post links to the various threads that the author was asking questions in, and he has all of them annotated with lessons learned. It’s a quality post and interesting reading in its own right, and is worth reading even if you never want to go through this particular design exercise.

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