Anybody know at what frequency that the inverter operates? I'm referring to the CCF kits that computer "modders" use to light up the insides of their cases.
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17 years ago
Question About CCF (Cold Cathode Fluorescent) Inverters
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- posted
17 years ago
Have a look at the Linear Technology application note AN-65.
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Jim Williams shows a lamp running happily in free air from 20kHz to
120kHz, where a mouned lamp, with just a bit more capacitance to ground, starts losing output above 80kHz.The only thing wrong with that Jim Williams application note (and it's four predecessors) is that he calls the inverter he uses a Royer inverter, though Royer's inverter was strictly square wave output device, and what Jim Williams uses looks very like the "class D sine wave oscillator described by Peter Baxandall (of tone control fame) in
Baxandall, P.J, Proc I.E.E 106, B, page 748 (1959)
which no American will have read because the Insitute of Electrical of Electrical Engineers is the British equivalent of the IEEE.
-- Bill Sloman, Nijmegen (but in Melbourne at the moment)