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Ferroxcube EFD12/6/3.5 former ....will it always be in stock?..somewhere?

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Flyback

Well-Known Member
Hello,
We need to design a single stage PFC’d Offline Buckboost converter LED driver for 30 to 100W. (as much power as components can be fitted inside the small enclosure that we have to work with)
The enclosure that we must fit inside is 140mm x 65mm and just 8mm high. We are only allowed surface mount components inside this enclosure.
We can put the AC filter and MOV, fuse etc, outside of this enclosure. Also, the bulk output capacitance, we have been told, can also be outside of this enclosure.
We need a small isolated flyback bias SMPS inside the enclosure, but the smallest off-the-shelf core and former that I can find in surface mount is the EFD12/6/3.5 by Ferroxcube. (it must be <8mm in height)
Since this is the only vendor of such a part in the world, can we always be sure that it would be in stock?

Ferroxcube EFD 12/6/3.5 Core and SMD former:
http://c1170156.r56.cf3.rackcdn.com/UK_PMA_EFD12_6_3.5-3C94_DS.pdf
 

ronsimpson

Well-Known Member
Most Helpful Member
That is small for "isolated". Depending on how you do isolation, the insulation may use up too much of the bobbin.
Ferroxcube has been here for a long time. Could be gone by Monday or may out last you. Who knows.
I like the EFD series. Used then many times when height is a problem.
 

JimB

Super Moderator
Most Helpful Member
Since this is the only vendor of such a part in the world, can we always be sure that it would be in stock?
Simple answer - no.
I do not have a crystal ball, and neither does anyone else.

If you really MUST have these, do a calculation of how many you expect to sell in the next x years, and then do a "lifetime buy" to purchase that many cores plus a few spares.

JimB
 

Dick Cappels

Active Member
Or...call your local Ferroxcube representative and ask whether this core is targeted for obsolescence and whether the company will issue a "last chance for lifetime buy" when they decide to discontinue the core.

Depending upon your distributor you might get that information from the distributor. I remember receiving "last chance" notifications from DigiKey for many years.
 
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