Voltage regulator module

Patent metadata

Field	Value
Publication number	US-11488764-B2
Application number	US-201916591062-A
Country	US
Kind code	B2
Filing date	Oct 2, 2019
Priority date	Oct 9, 2018
Publication date	Nov 1, 2022
Grant date	Nov 1, 2022

Abstract

A voltage regulator module includes a first circuit board assembly and a magnetic core assembly. The first circuit board assembly includes a first printed circuit board, a plurality of switch elements and a first molding compound layer. The switch elements are mounted on a first surface of the first printed circuit board. The first molding compound layer is formed on the first surface of the first printed circuit board to encapsulate the switch elements. The magnetic core assembly is arranged beside a second surface of the first printed circuit board, and includes a magnetic core portion and at least one first U-shaped copper structure. The magnetic core portion includes a plurality of openings. Each first U-shaped copper structure is penetrated through two corresponding openings to define two inductors. A first terminal of each inductor and the corresponding switch element are connected in series to define a phase circuit.

First claim

What is claimed is:

1. A voltage regulator module, comprising:
a first circuit board assembly comprising a first printed circuit board, a plurality of switch elements and a first molding compound layer, wherein the plurality of switch elements are disposed on a first surface of the first printed circuit board, and the first molding compound layer is formed on the first surface of the first printed circuit board to encapsulate the plurality of switch elements; and
a magnetic core assembly arranged beside a second surface of the first printed circuit board, and comprising a magnetic core portion and at least one first U-shaped copper structure, wherein the magnetic core portion comprises a plurality of openings, and each of the at least one first U-shaped copper structure is penetrated through two corresponding openings to define at least two inductors, wherein a first terminal of each inductor and the corresponding switch element are connected in series to define a phase circuit.

2. The voltage regulator module according to claim 1 , further comprising a second circuit board assembly, wherein the second circuit board assembly is arranged beside the magnetic core assembly, and the magnetic core assembly is arranged between the first circuit board assembly and the second circuit board assembly, wherein the second circuit board assembly comprises a second printed circuit board and at least one output capacitor, a first surface and a second surface of the second printed circuit board are opposed to each other, and the first surface of the second printed circuit board is arranged beside the magnetic core assembly.

3. The voltage regulator module according to claim 2 , wherein the second circuit board assembly is a system board.

4. The voltage regulator module according to claim 2 , wherein the magnetic core assembly further comprises at least one second U-shaped copper structure and a third U-shaped copper structure, wherein a height of the magnetic core portion is lower than a height of the first U-shaped copper structure, a height of the second U-shaped copper structure and a height of the third U-shaped copper structure.

5. The voltage regulator module according to claim 4 , wherein two first bonding pads and at least one pair of second bonding pads are disposed on the second surface of the first printed circuit board, and the second circuit board assembly further comprises a fourth bonding pad and at least one fifth bonding pad, wherein the first bonding pads and the fourth bonding pad are electrically connected with a positive input end of the voltage regulator module, the second bonding pads and the at least one fifth bonding pad are electrically connected with a negative output terminal of the voltage regulator module, the third U-shaped copper structure is fixed on and electrically connected with the two first bonding pads and the fourth bonding pad, each second U-shaped copper structure is fixed on and electrically connected with the corresponding pair of second bonding pads and the corresponding fifth bonding pad, and the first circuit board assembly and the second circuit board assembly are supported by the at least one first U-shaped copper structure, the at least one second U-shaped copper structure and the third U-shaped copper structure.

6. The voltage regulator module according to claim 2 , wherein an even number of third bonding pads are disposed on the second surface of the first printed circuit board, and the second circuit board assembly further comprises at least one sixth bonding pad, wherein each third bonding pad is electrically connected with the first terminal of the corresponding inductor, the at least one sixth bonding pad is electrically connected with a positive output terminal of the voltage regulator module, and each first U-shaped copper structure is fixed on and electrically connected with the corresponding two third bonding pads and the corresponding sixth bonding pad.

7. The voltage regulator module according to claim 6 , wherein each first U-shaped copper structure comprises two top surfaces and a bottom surface, wherein the two top surfaces of the first U-shaped copper structure are fixed on and electrically connected with the corresponding two third bonding pads, and the bottom surface of the first U-shaped copper structure is fixed on and electrically connected with the corresponding sixth bonding pad.

8. The voltage regulator module according to claim 2 , wherein the at least one output capacitor is embedded within the second printed circuit board, and a plurality of ball grid arrays are disposed on the second surface of the second printed circuit board.

9. The voltage regulator module according to claim 2 , wherein the output capacitor is mounted on the first surface of the second printed circuit board through a plastic molding process, and a plurality of ball grid arrays are disposed on the second surface of the second printed circuit board.

10. The voltage regulator module according to claim 9 , wherein the second circuit board assembly further comprises a plurality of copper blocks and a second molding compound layer, wherein the plurality of copper blocks are fixed on the first surface of the second printed circuit board to provide a supporting function, and the first surface of the second printed circuit board, the at least one output capacitor and the plurality of copper blocks are encapsulated by the second molding compound layer through a plastic molding process, wherein a top surface of each copper block is exposed outside the second molding compound layer.

11. The voltage regulator module according to claim 10 , wherein each of the copper blocks has a rectangular structure.

12. The voltage regulator module according to claim 10 , wherein each of the copper blocks has a trapezoid column structure with a bottom surface and a top surface, wherein the bottom surface and the top surface are parallel with each other, and an area of the bottom surface is smaller than an area of the top surface, wherein the bottom surface of the trapezoid column structure is fixed on the first surface of the second printed circuit board, the top surface of the trapezoid column structure is exposed outside the second molding compound layer, and a bonding pad is electroplated on the top surface of the trapezoid column structure.

13. The voltage regulator module according to claim 12 , wherein the area of the top surface of the trapezoid column structure is at least 1.3 times the area of the bottom surface of the trapezoid column structure.

14. The voltage regulator module according to claim 2 , wherein a plurality of perforations and a plurality of first blind holes are formed in the second surface of the first printed circuit board, and a plurality of second blind holes are formed in the first surface of the second printed circuit board, wherein the voltage regulator module further comprises a signal communication part with a plurality of pins, and the plurality of pins are divided into a first pin group and a second pin group, wherein first terminals of the pins in the first pin group are fixed in the corresponding perforations of the first printed circuit board, first terminals of the pins in the second pin group are fixed in the first blind holes of the first printed circuit board, second terminals of the plurality of pins are fixed in the corresponding second blind holes of the second printed circuit board, and a control signal is transmitted between the first circuit board assembly and the second circuit board assembly through the signal communication part.

15. The voltage regulator module according to claim 2 , wher

Assignees

• Delta Electronics Inc

Inventors

• Xiong Yahong
• Jin Da
• Su qinghua

Classifications

• H10W90/00

  Package configurations · CPC title

• H02M3/1584

  with a plurality of power processing stages connected in parallel · CPC title

• H05K7/2089

  for power electronics, e.g. for inverters for controlling motor · CPC title

• H01F17/04

  with magnetic core · CPC title

• H01F17/06 Primary

  with core substantially closed in itself, e.g. toroid · CPC title