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) ...
Forum Discussion
Salvo wrote:
Also to consider is the thermal time constant of the thermistor. The 20A, 5 ohm device has a time constant of 194s. That sounds like the device will hold 5 ohms for quite a while.
Sal
Just an FYI, the thermal time constant is calculated using values measured from the maximum hot temperature R to the ambient R.
It can't be used to calculate the negative change in R when operational current flows since I is not known and is a function of the value of C and series resistance of the transformer windings and diode bulk resistance...
