I have a VFD filament driver (LM92022) and i need to add a soft start for stop inrush current, for increase life time of the filament tube.
This solution its ok?
My tube working at 2.4v Ac / 80 ma.
LM9022 Scheamtic:
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Does the LM9022 work at all at voltages lower than its designed 5 V? – Hearth Nov 26 '22 at 18:36
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Yes: Supply Voltage -0.3V to +6.0V from DS. – arduplay Nov 26 '22 at 18:43
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that's the absolute maximum values. It's not guaranteed to work under those conditions, it's just guaranteed that it won't be destroyed. – Hearth Nov 26 '22 at 18:44
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Minim 2V / Maxim 5.5V – arduplay Nov 26 '22 at 19:04
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In that case, you could soft start from 2 to 5 V, but it would still start up at 2 V. If that's good enough for you, go for it. – Hearth Nov 26 '22 at 19:05
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I need a diagram :) – arduplay Nov 26 '22 at 19:07
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Why not use an ICL instead? Inrush Current Limiter – Davide Andrea Nov 26 '22 at 19:59
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Because power losses' – arduplay Nov 26 '22 at 20:36