[Re: thermal tips re expo converters:]

[Martin Czech]

I'd just like to mention that you need some thermal loss in order to
cool the device down again. If it would be perfectly isolated, this
would mean that heating is very fast, but cooling very very slow. The
slightest regulation loop overshoot, or self heating of the expo pair
would need very long to settle down.

A peak detector is an electrical analogy to this behaviour.
Without bleeder the control loop goes nuts.

m.c.