Miniature transformers adapted for use in galvanic isolators and the like
First Claim
1. An apparatus comprising:
- a primary winding;
a secondary winding, wherein one of said primary and secondary windings comprises a first component coil, said first component coil comprising;
a power pad at each end thereof;
a first substrate having a first substantially planar insulating layer of material having first top and first bottom surfaces;
a first trace on said first top surface, said first trace having a first outer end and a first inner end, a first spiral conductor being connected between said first outer and inner ends;
a second trace on said first bottom surface, said second trace having a second outer end and a second inner end, a second spiral conductor being connected between said second outer and inner ends; and
;
a conductor connecting said first inner end of said first trace to said second inner end of said second trace; and
an insulator separating said primary and secondary windings, said primary and secondary windings being aligned such that a portion of the magnetic field generated by said first component coil passes through the other of said primary and secondary windings when a potential difference is applied between said power pads of said first component coil.
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Accused Products
Abstract
A component coil for constructing transformers and the transformer constructed therefrom are disclosed. The component coil includes a substrate having an insulating layer of material having top and bottom surfaces. First and second traces are included on the top and bottom surfaces. Each trace includes a spiral conductor. The inner ends of the spiral conductors are connected by a conductor that passes through the insulating layer. The first and second spiral conductors are oriented such that magnetic fields generated by the first and second spiral conductors have components perpendicular to the top surface and in the same direction. The component coils can be used to construct a power transformer or a galvanic isolator.
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Citations
17 Claims
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1. An apparatus comprising:
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a primary winding; a secondary winding, wherein one of said primary and secondary windings comprises a first component coil, said first component coil comprising; a power pad at each end thereof; a first substrate having a first substantially planar insulating layer of material having first top and first bottom surfaces; a first trace on said first top surface, said first trace having a first outer end and a first inner end, a first spiral conductor being connected between said first outer and inner ends; a second trace on said first bottom surface, said second trace having a second outer end and a second inner end, a second spiral conductor being connected between said second outer and inner ends; and
;a conductor connecting said first inner end of said first trace to said second inner end of said second trace; and an insulator separating said primary and secondary windings, said primary and secondary windings being aligned such that a portion of the magnetic field generated by said first component coil passes through the other of said primary and secondary windings when a potential difference is applied between said power pads of said first component coil. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification