The circuit I have sent in another thread (CCFL backlight) some time
before uses one transistor and a transformer to achieve CCFL drive or
boost (unregulated). The usual way to regulate for my circuit is a zener
arrangement after the rectifier.

In my experience it is not realistic to try to achieve more than 3:1 boost
from a single coil booster under reasonable load. 2:1 is a more
conservative figure that is more likely to work for beginners. To obtain
more another coil is required (in series with the driven coil).

Peter

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