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US 8,130,067 B2Granted
High frequency semiconductor transformer
AssigneeTexas Instruments Incorporated
InventorsDok Won Lee, Peter Smeys, Anuraag Mohan, Peter J. Hopper
Life of this patent
Estimating the term…
Abstract
A semiconductor transformer provides high frequency operation by forming the primary windings of the transformer around a section of magnetic material that has a hard axis that lies substantially parallel to the direction of the magnetic field generated by the primary windings. The core can also be formed to have a number of sections where the magnetic flux follows the hard axis through each section of the core.
Claims20
A transformer comprising:
- a non-conductive structure;
- a magnetic core structure including:
- a first magnetic structure that touches the non-conductive structure, the first magnetic structure having a hard axis that lies in a first direction, and a bottom surface that lies in a horizontal plane;
- a second magnetic structure that touches the non-conductive structure, the second magnetic structure having a hard axis that lies in a second direction different from the first direction, and a bottom surface;
- and
- a third magnetic structure that touches the non-conductive structure, the third magnetic structure having a hard axis that lies in the first direction, and a bottom surface that lies in the horizontal plane, the first, second, and third magnetic structures being spaced apart from each other;
- and
- a first coil that touches the non-conductive structure, the first coil being wrapped around the first magnetic structure so that magnetic field lines from the first coil extend along the hard axes of the first, second, and third magnetic structures.
5 more elements
A transformer comprising:
- a non-conductive structure;
- a magnetic core structure including:
- a first magnetic structure that touches the non-conductive structure, the first magnetic structure having a hard axis that lies in a first direction;
- and
- a second magnetic structure that touches the non-conductive structure, the second magnetic structure having a hard axis that lies in a second direction different from the first direction, the first and second magnetic structures being spaced apart from each other;
- and
- a first coil that touches the non-conductive structure, the first coil being wrapped around only the first magnetic structure so that magnetic field lines from the first coil extend along the hard axes of the first and second magnetic structures.
4 more elements
A method of forming a transformer comprising:
- forming a non-conductive structure;
- forming a magnetic core structure including:
- forming a first magnetic structure that touches the non-conductive structure, the first magnetic structure having a hard axis that lies in a first direction, and a bottom surface that lies in a horizontal plane;
- forming a second magnetic structure that touches the non-conductive structure, the second magnetic structure having a hard axis that lies in a second direction different from the first direction, and a bottom surface;
- and
- forming a third magnetic structure that touches the non-conductive structure, the third magnetic structure having a hard axis that lies in the first direction, and a bottom surface that lies in the horizontal plane, the first, second, and third magnetic structures being spaced apart from each other;
- and
- forming a first coil that touches the non-conductive structure, the first coil being wrapped around the first magnetic structure so that magnetic field lines from the first coil extend along the hard axes of the first, second, and third magnetic structures.
5 more elements
Dependencies are inferred from the claim text.