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Feasibility of a small custom 1W SMT DCDC transformer for qty 1000

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Psi:
I'm looking at the feasibility of replacing 4x isolated SIP package DCDC bricks with a small custom SMT DCDC transformer.
It would have 5 isolated windings, 1 in 4 out.

Just wondering how feasibility a custom transformer would be for a low volume product. We sell like 300 a year. but could maybe purchase 1000 transformers at a time. I know places like coilcraft can make custom transformers to order, but is that cost effective for this volume? 

What sort of price would you expect for a small SMT mount  5 winding 1W (total) power transformer. If I ordered say 1000?
The current DCDC bricks cost $1.5 each so we're spending $6 on them. 
Making the design simpler and more SMT less TH is an advantage, so having just one transformer instead of 4 SIP modules is an advantage even if it costs the same.  Probably not worth it if it costs more.

Thanks

thm_w:
Get your rough specs together and ask for a few quotes on alibaba. https://www.alibaba.com/product-detail/ee10-smd-inductor-flyback-transformer-smps_1600529170703.html
https://www.coilcraft.com/de-de/products/transformers/dc-dc-transformer-worksheet/

I'm guessing coilcraft would be in the $3-8 range.
China <$2.

What is isolation voltage between secondaries?
Are you ok with possibly more losses if loads are imbalanced?

4 out means 8 wires which might require a larger core or maybe multiple small units?

jbb:
Haven’t used them in a long time, but I think https://www.marquemagnetics.com/ is OK with moderate order quantities.

Magnetics manufacturers often have access to quite a large catalog of components like cores and bobbins and triple insulated wire that aren’t easily available in small quantities or from the usual distributors.

So I suggest you give them a briefing of what you want to accomplish (volume, operating freq, mag inductance, turns ratios, required isolation etc.) and see what they come back with instead of ‘please fabricate this exact design.’

Psi:

--- Quote from: jbb on March 25, 2024, 11:42:05 pm ---so I suggest you give them a briefing of what you want to accomplish (volume, operating freq, mag inductance, turns ratios, required isolation etc.) and see what they come back with instead of ‘please fabricate this exact design.’

--- End quote ---

 :-+

tszaboo:
https://www.we-online.com/en/components/products/pbs/cm/pcd
I haven't used them for transformers yet and I don't know how good is the support outside the EU. Here its really good.

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