Author Topic: Cant buy transformer kit for flyback  (Read 1398 times)

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Offline FaringdonTopic starter

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Cant buy transformer kit for flyback
« on: June 07, 2023, 07:45:50 pm »
Hi,
We wish to make some EPC17 flyback transformers.

We wish to buy the following……..

BEPC-17-119GA (Former)
FEPC-17-A (Clamp)
PC44EPC17A080 (Gapped ferrite half for AL=80)
PC44EPC17-Z (ungapped ferrite half)

….Do you know where to buy?, they are not on digikey, pulse electronics, mouser, RS, Farnell, Kaschke, cosmos, Elna…or anywhere else
'Perfection' is the enemy of 'perfectly satisfactory'
 

Offline TimFox

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Re: Cant buy transformer kit for flyback
« Reply #1 on: June 07, 2023, 09:26:53 pm »
https://www.ibselectronics.com/products/tdk/bepc17119ga/
Do they have them?
First reply when googling your first part number.
 
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Offline FaringdonTopic starter

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Re: Cant buy transformer kit for flyback
« Reply #2 on: June 08, 2023, 05:25:44 am »
Thanks, but no they dont sell them.
'Perfection' is the enemy of 'perfectly satisfactory'
 

Offline jonpaul

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Re: Cant buy transformer kit for flyback
« Reply #3 on: June 08, 2023, 05:46:06 am »
FTTS: as always another nonsense post, similar to other on these same shapes long ago.

TDK EPC17 shapes are seldom used as they are very delicate and very expensive. 
TDK exited the bobbin and clip manufacture many years ago.

OEM qtys will be ~ 50K..1000K sets MOQ,
custome order,  NCNR. 26..84 weeks ARO.
TDK cores are Avail thru authorized TDK importers, not consumer disty!
Contact your local (UK?) authorized TDK disty.

Actual power supply engineers design around popular and  easily availible core shapes during  the magnetics design and selection.
rather than your always exotic  and unavailable shapes.
We check cost and availablity BEFORE not after.

In general  gapped parts are muxh less available and usually are custom ground , so  even more costly and rare.
Often we use a paper or fiberglass gap across all faces of ungapped coresets.

Of course your reply will be equally pointless, with usual  excuses whey you MUST use the unavailable shape you so foolishly selected.

Oh hum...10 min of my time down FTTS toilet bowl....

j





« Last Edit: June 08, 2023, 06:38:27 am by jonpaul »
Jean-Paul  the Internet Dinosaur
 
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Offline iso14000

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Re: Cant buy transformer kit for flyback
« Reply #4 on: June 08, 2023, 08:27:46 am »
by the past I used Ferroxcube to build transformer.
catalog, samples.... distributors... everything is there to workn even in the UK
 
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Offline jonpaul

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Re: Cant buy transformer kit for flyback
« Reply #5 on: June 08, 2023, 06:37:19 pm »
Old Ferroxcube (Philips) >>>EPCOS long ago.

out of bobbin biz, disty only

j
Jean-Paul  the Internet Dinosaur
 
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Offline FaringdonTopic starter

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Re: Cant buy transformer kit for flyback
« Reply #6 on: June 09, 2023, 06:02:27 am »
Thanks, it has to be EPC17, because of its low profile. Apparently some small German co's sell them in small qtys?
Even ebay doesnt have them.
'Perfection' is the enemy of 'perfectly satisfactory'
 

Offline jonpaul

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Re: Cant buy transformer kit for flyback
« Reply #7 on: June 09, 2023, 06:09:09 am »
many other low profile core shapes.
Bon chance
Jean-Paul  the Internet Dinosaur
 
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Offline temperance

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Re: Cant buy transformer kit for flyback
« Reply #8 on: June 09, 2023, 03:23:54 pm »
I put a note on my desk addressing the wife explaining that If i suffocated it's probably from reading an other post of yours.



« Last Edit: June 10, 2023, 12:28:17 am by temperance »
 
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Offline FaringdonTopic starter

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Re: Cant buy transformer kit for flyback
« Reply #9 on: June 09, 2023, 05:49:10 pm »
Thanks, it must be <10.6mm in height, and we need it for flyback 100-265vac and 17w, 24vout
'Perfection' is the enemy of 'perfectly satisfactory'
 

Offline floobydust

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Re: Cant buy transformer kit for flyback
« Reply #10 on: June 09, 2023, 06:02:01 pm »
What comes first - the design, parts availability, mechanical size, cost target, or a prototype build?  :-//
There are ways to procure the magnetics but I don't feel like sharing them, this is a clown car.
 
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Offline temperance

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Re: Cant buy transformer kit for flyback
« Reply #11 on: June 10, 2023, 12:27:38 am »
@ floobydust

A clown car? I found you one.




Also, what's wrong with an EFD20? It's about 10mm in height and core halves with an air gap and bobbins can be bought from mouser for peanuts.



 

Offline floobydust

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Re: Cant buy transformer kit for flyback
« Reply #12 on: June 10, 2023, 03:29:27 am »
That's a simulation - they don't crash or bump into anything. Hmmm.
OP got a liquid nitrogen cooling system, 24W 17W out of that tiny core, under 10.6mm height, would put shame to Apple. Honk honk.

edit: OP cross-posted https://www.edaboard.com/threads/wish-to-buy-epc17-transformer-ferrite-bobbin-clamp.407231/
« Last Edit: June 10, 2023, 04:31:58 am by floobydust »
 
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Offline Gyro

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Re: Cant buy transformer kit for flyback
« Reply #13 on: June 10, 2023, 08:22:50 pm »
edit: OP cross-posted https://www.edaboard.com/threads/wish-to-buy-epc17-transformer-ferrite-bobbin-clamp.407231/

Everything is cross posted on edaboard, in fact they could rename their Power Electronics section the cupoftea (aka Faringdon/Treez) show... most of the threads are his!
Best Regards, Chris

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