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Registered Member #3943
Joined: Sun Jun 12 2011, 05:24PM
Location: The Shire, UK
Posts: 552
Platinum wrote ...
All I care about is good postage, anyway those MOSFET's are 1.47 that OK I suppose, what is the max current 25A and the 250n is 30A, so I suppose they are OK.
I will buy 2 IRFP250N's and 4 of those MOSFET's.
I'll buy some diodes too.
Thanks!
I will be getting these.
I did buy zeners but they are gone somewhere :(
Anyway they are OK?
Just a heads up, farnell have a £20 minimum order total before you can place an order.
Registered Member #195
Joined: Fri Feb 17 2006, 08:27PM
Location: Berkeley, ca.
Posts: 1111
irfp450 will work to and you are not stuck with irfp250 just make shure they work. I generaly find the fet that has the highest wattage rating and balence that agenst cost
Registered Member #3888
Joined: Sun May 15 2011, 09:50PM
Location: Erie, PA
Posts: 649
I think the three orders of magnitude discrepancy between the two is the indicator that one is dead lol, not which pins you measured :P If you need something else for your order, how about a nice capacitor or two, or a big inductor core
Registered Member #3926
Joined: Fri Jun 03 2011, 08:32PM
Location: UK.
Posts: 525
I actually don't have the money.
But the MOSFET is fried. So I'm not sure how it died though, I was running it about 10minutes the flyback was very hot, burning you finger if you touch it and the output just faded and went out, the capacitor in the ZVS was bulging and that has been replaced. But I'm wondering, I replaced the zeners and diodes with junk parts from my box. If I put a new FET in I wonder if it'll blow?
Registered Member #3943
Joined: Sun Jun 12 2011, 05:24PM
Location: The Shire, UK
Posts: 552
Platinum wrote ...
I actually don't have the money.
But the MOSFET is fried. So I'm not sure how it died though, I was running it about 10minutes the flyback was very hot, burning you finger if you touch it and the output just faded and went out, the capacitor in the ZVS was bulging and that has been replaced. But I'm wondering, I replaced the zeners and diodes with junk parts from my box. If I put a new FET in I wonder if it'll blow?
I am thinking that maybe the resonant capacitor was the original thing to fail from overheating and it took one of the MOSFET's will it when the circuit latched up from capacitor failure.
As to will it blow again if you replaced the MOSFET, there is only one way to find out.
What value cap did you replace the original one with? what number code is on it?
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ZVS dead.
