has anyone constructed a dummy test load for testing CCFL high voltage power supples?
I have been running into more of these and would like a quick way to load the inverter to see if its working, or shutting down due to bad tubes.
It seems to be a challenge to do this (short of just using another tube as a load)
You would need some sort of zenar like device to start conducting at about 1500 volts or so then drop down to the working voltage of 500/700 volts. With enough series resistance so not to overload the power supply. maybe a TVSS gas discharge tube with a series resistance? most of these supplies have a control chip that will try to strike the lamp with a high voltage, then either lower the votage or shutdown due to too much or too little current flow.
An OZ960 seems to be a popular controller.
Anybody thought about doing this and have any ideas?