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ultrafi 17th November 2012 01:01 AM

Help - FJPF5200OTU obsolete!
 
I had a fellow come by with one of your Placid power supply boards - the FJPF5200OTU is bad and Mouser and Digikey says the part is now obsolete. Their substitutes are a different packaging.

Dunno how I get drug into these things; but, he's a good egg and I'd like to help him out.

Thoughts?

twluke 17th November 2012 01:42 AM

Quote:

Originally Posted by ultrafi (Post 3244575)
I had a fellow come by with one of your Placid power supply boards - the FJPF5200OTU is bad and Mouser and Digikey says the part is now obsolete. Their substitutes are a different packaging.

Dunno how I get drug into these things; but, he's a good egg and I'd like to help him out.

Thoughts?

You might want to look for any NPN power transistor of TO-220 package with hFE higher than 80. This suggestion is originally from Russ in TPA support forum months ago.

A few weeks ago, I came across the same situation and replaced the bad 5200OTU with an old Toshiba 2SD2271 for a substitute, that is now working fine with my Placid HD.

Russ White 18th November 2012 01:50 PM

I would try to keep the hFE > 80 - otherwise as long as the pin-out is the same you could use a multitude of power transistors there. 25-50W types are pretty common.

They don't have to be the insulated package - that is just convenient.

If you use non-insulated type you should provide the insulation yourself.

Cheers!
Russ


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