Electronetics deploys this relatively new construction technique to design custom planar transformers and inductors with extremely low profiles.
We build stand-alone magnetics and can also consult on designs to seamlessly integrate the core and coils into your printed circuit board. Pros and cons of planar magnetics are:
Pros:
Very low profile
Excellent repeatability from unit to unit
Simple construction increases volume producibility
Especially suitable for higher operating frequencies
Cons:
Higher cost of materials
Not suitable in complex coil configurations
Limited turns ratio options
Limited core types and sizes limit design flexibility
