A heat spreader is disclosed. The heat spreader includes a body member, a first fin connected to the body member, a second fin connected to the body member, a third fin connected to the body member, and a fourth fin connected to the body member. The first and second fins define a first spacing therebetween. The second and third fins define a second spacing therebetween. The third and fourth fins define a third spacing therebetween. The second spacing is greater than the first spacing and the third spacing.
1. A transformer assembly, comprising:
a coil;
a magnetic core; and
a heat spreader in contact with the coil and the magnetic core, wherein the heat spreader comprises:
a body member;
a first fin connected to the body member and in contact with the magnetic core;
a second fin connected to the body member and in contact with the coil and the magnetic core, wherein the second fin is adjacent the first fin;
a third fin connected to the body member and in contact with the coil and the magnetic core, wherein the third fin is adjacent the second fin; and
a fourth fin connected to the body member and in contact with the magnetic core, wherein the fourth fin is adjacent the third fin.
2. The transformer assembly of claim 1 , wherein the transformer assembly is impregnated with varnish.
3. The transformer assembly of claim 1 , wherein the magnetic core comprises first and second E-shaped magnetic cores.
4. The transformer assembly of claim 1 , further comprising a retention device having a first end and a second end, wherein the retention device is in contact with:
the first fin of the heat spreader proximate the first end of the retention device; and
the fourth fin of the heat spreader proximate the second end of the retention device.
5. The transformer assembly of claim 1 , wherein the heat spreader is fabricated from a metal.
6. The transformer assembly of claim 1 , wherein the first, second, third and fourth fins are integrally formed with the body member.
7. The transformer assembly of claim 1 , wherein the body member includes a first mounting tab and a second mounting tab.
8. The transformer assembly of claim 7 , wherein the first mounting tab defines a first mounting hole and the second mounting tab defines a second mounting hole.
9. The transformer assembly of claim 1 , wherein:
the body member includes a first surface and a second surface opposite the first surface;
the first fin is connected to the first surface of the body member proximate a first end of the body member;
the second fin is connected to the first surface of the body member adjacent the first fin;
the third fin is connected to the first surface of the body member adjacent the second fin; and
the fourth fin is connected to the first surface of the body member adjacent the third fin and proximate a second end of the body member.
10. The transformer assembly of claim 9 , wherein:
the first fin includes:
a first face proximate the first end of the body member; and
a second face opposite the first face;
the second fin includes:
a first face adjacent the second face of the first fin; and
a second face opposite the first face of the second fin;
the third fin includes:
a first face adjacent the second face of the second fin; and
a second face opposite the first face of the third fin; and
the fourth fin includes:
a first face adjacent the second face of the third fin; and
a second surface opposite the first face of the fourth fin.
11. The transformer assembly of claim 10 , wherein:
the first and second faces of the first fin are substantially perpendicular to the second surface of the body member;
the first and second faces of the second fin are substantially perpendicular to the second surface of the body member;
the first and second faces of the third fin are substantially perpendicular to the second surface of the body member; and
the first and second faces of the fourth fin are substantially perpendicular to the second surface of the body member.
12. The transformer assembly of claim 11 , wherein the first and second faces of the first fin are substantially parallel to:
the first and second faces of the second fin;
the first and second faces of the third fin; and
the first and second faces of the fourth fin.
13. The transformer assembly of claim 10 , wherein:
the second face of the first fin has a first cross-sectional area;
the first face of the second fin has a second cross-sectional area; and
the second face of the second fin has a third cross-sectional area, wherein the third cross-sectional area is greater than the second cross-sectional area.
14. The transformer assembly of claim 13 , wherein the second cross-sectional area is greater than the first cross-sectional area.
15. The transformer assembly of claim 14 , wherein:
the first face of the third fin has a fourth cross-sectional area;
the second face of the third fin has a fifth cross-sectional area;
the first face of the fourth fin has a sixth cross-sectional area, wherein the fifth cross-sectional area is greater than the sixth cross-sectional area.
16. The transformer assembly of claim 15 , wherein the fourth cross-sectional area is greater than the fifth cross-sectional area.
17. The transformer assembly of claim 16 , wherein:
the first cross-sectional area is substantially equivalent to the sixth cross-sectional area;
the second cross-sectional area is substantially equivalent to the fifth cross-sectional area; and
the third cross-sectional area is substantially equivalent to the fourth cross-sectional area.
18. The transformer assembly of claim 10 , wherein the second face of the first fin defines a first groove.
19. The transformer assembly of claim 18 , wherein the first face of the fourth fin defines a second groove.
20. The transformer assembly of claim 1 , wherein:
the first and second fins define a first spacing therebetween;
the second and third fins define a second spacing therebetween, wherein the second spacing is greater than the first spacing; and
the third and fourth fins define a third spacing, wherein the second spacing is greater than the third spacing.
21. The transformer assembly of claim 20 , wherein the first spacing is substantially equivalent to the third spacing.
22. An electrical device, comprising:
a printed circuit board; and
a transformer assembly connected to the printed circuit board, wherein the transformer assembly comprises:
a coil;
a magnetic core; and
a heat spreader in contact with the coil and the magnetic core, wherein the heat spreader comprises:
a body member;
a first fin connected to the body member and in contact with the magnetic core;
a second fin connected to the body member and in contact with the magnetic core and the coil;
a third fin connected to the body member and in contact with the magnetic core and the coil; and
a fourth fin connected to the body member and in contact with the magnetic core.
23. The electrical device of claim 22 , wherein the electrical device is a power supply.
24. The electrical device of claim 22 , wherein the transformer assembly is soldered to the printed circuit board.
25. The electrical device of claim 22 , wherein:
the second fin of the heat spreader is adjacent the first fin;
the third fin of the heat spreader is adjacent the second fin; and
the fourth fin of the heat spreader is adjacent the third fin.