Isolated and small size 12VDC out 85-265AC in

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I require 12V isolated (5000V) but with a low profile transformer and small capacitors. The 12V will supply 4 relays taking 160mA when all powered. The intent is to use  a LDO regulator to supply 3.3V. So 12V 200mA would do the trick. Given the 12V is only driving relays: how small can we get this power supply?

 PI Expert 9 suggests a LinkSwitch-CV (LNK623PG).

Can you give some advice?

Also some Transformer suppliers UK/Europe/China.


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LinkSwitch-CV_PIDesign1.uds362 KB

Hi Mike,

Please re-post your question to the "Low Power Design" forum, which handles the type of products suitable for your inquiry.

Thank you.