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:
OK, let's say the energy dissipated by the thermistor is 1/2CV^2.
With C = 2400uF and V = 170V, we get E = 35.5 J. The part that's failing, per spec should be failing at 300 J. There's almost a factor 10 difference. That equation does not fit the bill.
Salken white wrote:Salvo wrote:
...The energy absorbed by the thermistor is I^2 * R * t. Where I is a exponential function of the RC time constant.
Sal
Calculate the RC time constant, and energy consumed, for me in a thermistor RC controlled circuit...
Since R varies with temperature, the Thermal Time Constant and absolute energy consumed is what is used...
Are you looking at the steady state and absolute specifications?
Can you provide the actual failed part number specification?
Can you provide a schematic with parts numbers?
Without this information, everything is speculation...
