Multi-layer, multi-functioning printed circuit board

• US 6,420,953 B1
• Filed: 12/11/2000
• Issued: 07/16/2002
• Est. Priority Date: 05/19/2000
• Status: Expired due to Term

• Current Assignee: Pulse Electronics Incorporated (Yageo Corporation)
• Original Assignee: Pulse Engineering Incorporated (Yageo Corporation)
• Inventors: Dadafshar, Majid
• Primary Examiner(s): MAI, ANH T
• Application Number:
  US09/735,108
• Publication Number:
  US 20020070835A1
• Time in Patent Office: 582 Days
• Field of Search: 336/200, 336/223, 336/232
• US Class Current: 336/200
• CPC Class Codes: H01F 2027/2857 Coil formed from wound foil conductor
• CPC Class Codes: H01F 2027/297 with pin-like terminal to be inserted in hole of printed path
• CPC Class Codes: H01F 27/027 specially adapted for combination of signal type inductors or transformers with electronic circuits, e.g. mounting on printed circuit boards
• CPC Class Codes: H01F 27/2804 Printed windings
• CPC Class Codes: H01F 27/2852 Construction of conductive connections, of leads
• CPC Class Codes: H01F 27/292 Surface mounted devices
• CPC Class Codes: H05K 1/165 incorporating printed inductors

Abstract

A multi-layer and multi-functioning printed circuit board (PCB) defines a magnetic component formed using planar technology and multiple PCBs, each having four or six layers and each including a single winding. One set of windings is configured as an inductor and a second set of windings is configured as a transformer. The PCBs are stacked in an offset arrangement such that pins connecting one set of windings on a PCB or PCBs to a main circuit board do not penetrate the PCB or PCBs including another set of windings. The invention is configured to function both as an inductor and a transformer.

Claims

1. An electrical device comprising:

a plurality of printed circuit boards organized into a multi-layer configuration;

at least a first of the plurality of printed circuit boards comprising a primary winding of a transformer;

at least a second of the plurality of printed circuit boards comprising a secondary winding of a transformer;

at least one conductive plate configured as an output inductor; and

a plurality of connector pins configured to electrically connect the primary winding, the secondary winding, and the conductive plate to a main circuit board.

2. The device of claim 1, wherein each pin of the plurality of connector pins penetrates only the at least a first of the plurality of printed circuit boards comprising the primary winding or the at least a second of the plurality of printed circuit boards comprising the secondary winding.

3. The device of claim 2, wherein the at least a first of the plurality of printed circuit boards comprising the primary winding and the at least a second of the plurality of printed circuit boards comprising the secondary windings are electrically separated from each other.

4. The electrical device of claim 1, wherein the at least a first of the plurality of printed circuit boards is sandwiched between two printed circuit boards from the at least a second of the plurality of printed circuit boards.

5. The device of claim 1, further comprising a main circuit board, wherein the plurality of connector pins connect the primary winding, the secondary winding and the conductive plate to said main circuit board.

6. The device of claim 1, wherein there is one printed circuit board comprising the primary winding and two printed circuit boards comprising the secondary winding.

7. The device of claim 1, wherein each of the plurality of printed circuit boards comprises a multi-layer board.

8. The device of claim 1, wherein the conductive plate is a copper plate.

9. An electrical component comprising:

a plurality of core members;

a plurality of printed circuit boards configured to be stackable in a multi-layer configuration;

at least a first one of the plurality of printed circuit boards comprising a primary winding of a transformer positioned between a first core member and a second core member of the plurality of core members;

at least a second one of the plurality of printed circuit boards comprising a secondary winding of the transformer positioned between the first core member and the second core member of the plurality of core members;

at least one conductive plate positioned between said second core member and a third core member of the plurality of core pieces; and

a plurality of connector pins configured to electrically connect the primary winding, the secondary winding and the conductive plate to a main circuit board, wherein each pin of said plurality of connector pins penetrates only the at least a first one of the plurality of printed circuit boards or the at least a second one of the plurality of printed circuit boards.

10. The device of claim 9, wherein the core members are fabricated from a ferrite material.

11. The electrical device of claim 9, wherein the conductive plate is a copper plate.

12. The electrical device of claim 9, wherein the conductive plate and the second and the third core members are configured as an output inductor.

13. The electrical device of claim 9, wherein the at least a first one of the plurality of printed circuit boards is sandwiched between two printed circuit boards from the at least a second one of the plurality of printed circuit boards.

14. The device of claim 13, wherein there is one printed circuit board comprising the primary winding and two printed circuit boards comprising the secondary winding.

15. The device of claim 9, wherein each of the plurality of printed circuit boards are multi-layer boards.

16. The device of claim 15, wherein each of the plurality of printed circuit boards comprises four to six layers.

17. The electrical device of claim 9, wherein the at least a first one of the plurality of printed circuit boards comprising the primary winding and the at least a second one of the plurality of printed circuit boards comprising the secondary windings are electrically separated from each other.

18. A method of manufacturing an electrical device, the method comprising:

printing at least one coil on each of a plurality of printed circuit boards;

wiring at least a first of the plurality of printed circuit boards so that the at least one coil comprises a primary winding of a transformer;

wiring at least a second of the plurality of printed circuit boards so that the at least one coil comprises a secondary winding of the transformer;

stacking the plurality of the printed circuit boards in a multi-layer arrangement;

wiring a conductive plate, wherein the conductive plate is configured as an output inductor; and

connecting the plurality of printed circuit boards and the conductive plate via connecting pins to a main circuit board.

19. The method of claim 18 wherein connecting the plurality of printed circuit boards via connecting pins creates a flux that opposes a flux created by the connecting the conductive plate via connecting pins.

20. The method of claim 18, wherein in connecting the plurality of printed circuit boards, each pin of the plurality of connector pins penetrates only the at least a first of the plurality of printed circuit boards comprising the primary winding or the at least a second of the plurality of printed circuit boards comprising the secondary winding.

21. The method of claim 18, wherein the at least a first of the plurality of printed circuit boards is stacked so as not to be in physical or electrical contact with the at least a second of the plurality of printed circuit boards.

22. The method of claim 18, wherein one printed circuit board of the plurality of printed circuit boards comprises the primary winding of the transformer and two printed circuit boards of the plurality of printed circuit boards comprise the secondary winding of the transformer.

23. The method of claim 22, further comprising connecting a main switch to a power supply, wherein the main switch is configured to control power to the electrical device.

24. The method of claim 23, wherein the output inductor is configured to store energy when the main switch is in a switch “

on”

position and configured to provide the stored energy to a load when the main switch is in a switch “

off”

position.

25. The method of claim 18, wherein the conductive plate is a copper plate.

26. The method of claim 18, wherein each of the plurality of printed circuit boards are multi-layer.

27. The method of claim 26, wherein each of the plurality of printed circuit boards comprises four to six layers.

28. The method of claim 18, further comprising supplying power to the electrical device via a switch mode power supply.

29. An electrical component comprising:

a plurality of core pieces;

a plurality of printed circuit boards configured into a multi-layer configuration;

means for wiring at least a first of the plurality of printed circuit boards so as to define at least one coil which comprises a primary winding of a transformer;

means for wiring at least a second of the plurality of printed circuit boards so as to define at least one coil which comprises a secondary winding of the transformer;

means for stacking the plurality of printed circuit boards in a multi-layer arrangement;

a conductive plate, wherein the conductive plate is configured as an output inductor; and

means for connecting the plurality of the printed circuit boards and the conductive plate to a main circuit board.