Cold Cathode Fluro Light driver

Circuit I built to try to light up some 48inch ccfl tubes pulled out of a discarded Sony LCDTV. Transformer is an 11H wax coated thing from a 1950s valve TV and the fets are irfp250. topology is similar to the mazilli ZVS driver. The tube strikes, but the oscillator frequency is much too low, so the tube glows dimly and only emits UV. Will search for a better transformer. The original TV driver board for the tubes has a computer on it and 395v DC input. The original transformer is fully potted and has both primaries in series, and gets driven by what looks like a H-Bridge made out of n-channel mosfets.

published 12 years ago