Author Topic: SEPIC inductors located on top and bottom PCB layer.  (Read 326 times)

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Online PsiTopic starter

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SEPIC inductors located on top and bottom PCB layer.
« on: November 27, 2022, 02:33:46 am »
With regard to undesirable interactions, what are the considerations when locating two separate inductors in a SEPIC with one above the other on the top and bottom of the PCB?
eg, should you use inductors with the same/different winding directions etc..

(I know you can get dual/coupled inductors in one package but I don't want to limit myself to a 'specialized' inductor.)


I think the answer is that they should always be the same winding direction, but just wanted to check.
Flipping one upside-down for bottom layer shouldn't change anything from a winding direction standpoint.
« Last Edit: November 27, 2022, 02:36:44 am by Psi »
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Offline T3sl4co1l

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Re: SEPIC inductors located on top and bottom PCB layer.
« Reply #1 on: November 27, 2022, 06:23:12 am »
The coupling factor will be negligible (~0.02 max?), at least for most sizes, assuming open types, even without inner planes shielding them.

Tim
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