Converter In-Rush Thermistors etc, UPDATE -4
UPDATE on 17 Nov, Update 2 on 22 Nov, Update 3 on 16 Jan 14, Update 4 on 19 Oct 14. --------------- In a recent thread there was mention of how you can wreck your gizmo (in my case a converter) ...
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Unless the 2 thermistors are exactly the same, a matched set, one of them will absorb more energy than the other and very little performance gain, if any, will be achieved - my guess is the tolerance is +- 20%.
If they are matched, the thermal time constant will be reduced and twice the current will flow sooner, which defeats the whole purpose of trying to limit the inrush...
The surge limiter is sized to absorb the in-rush created by by the energy stored in the capacitor, which is equal to C times the voltage across the capacitor squared divided by 2.
The energy is in Joules, which is the specification I stated...
If they are matched, the thermal time constant will be reduced and twice the current will flow sooner, which defeats the whole purpose of trying to limit the inrush...
The surge limiter is sized to absorb the in-rush created by by the energy stored in the capacitor, which is equal to C times the voltage across the capacitor squared divided by 2.
The energy is in Joules, which is the specification I stated...
