Stacked power supply topologies and inductor devices

Patent metadata

Field	Value
Publication number	US-12088205-B2
Application number	US-202318206802-A
Country	US
Kind code	B2
Filing date	Jun 7, 2023
Priority date	Oct 17, 2019
Publication date	Sep 10, 2024
Grant date	Sep 10, 2024

Abstract

According to one configuration, an inductor device comprises: core material and one or more electrically conductive paths. The core material is magnetically permeable and surrounds (envelops) the one or more electrically conductive paths. Each of the electrically conductive paths extends through the core material of the inductor device from a first end of the inductor device to a second end of the inductor device. The magnetically permeable core material is operative to confine (guide, carry, convey, localize, etc.) respective magnetic flux generated from current flowing through a respective electrically conductive path. The core material stores the magnetic flux energy (i.e., first magnetic flux) generated from the current flowing through the first electrically conductive path. One configuration herein includes a power converter assembly comprising a stack of components including the inductor device as previously described as well as a first power interface, a second power interface, and one or more switches.

First claim

The invention claimed is:

1. An apparatus comprising: a stack of components including: multiple switches disposed in a first layer of the stack, the multiple switches coupled to a first power interface of the stack to receive power from the first power interface; an inductor device disposed in a second layer of the stack, a first axial end of the inductor device electrically connected to the multiple switches; and a second power interface disposed at a third layer in the stack, the second power interface electrically coupled to a second axial end of the inductor device, the second axial end of the inductor device operable to output an output current based on the received power, the second power interface operable to receive and output the output current from the second axial end of the inductor device.

2. The apparatus as in claim 1 , wherein the first power interface couples the multiple switches to an input voltage node and a reference voltage node.

3. The apparatus as in claim 2 , wherein the multiple switches in the second layer are vertical field effect transistors disposed between the first power interface and the first axial end of the inductor device.

4. The apparatus as in claim 1 , wherein the stack of components is a power converter operable to convert an input voltage received at the first power interface into the output current outputted from the second power interface; and
wherein the inductor device includes multiple inductive paths disposed in the stack between the first axial end and the second axial end.

5. The apparatus as in claim 4 , wherein the multiple inductive paths include a first inductive path and a second inductive path extending through the inductor device, the first inductive path disposed in a first phase of the power converter, the second inductive path disposed in a second phase of the power converter, a combination of the first phase and the second phase disposed in parallel to produce the output current.

6. The apparatus as in claim 1 , wherein the inductor device includes an inductive path, the inductive path being a non-winding path extending from the first axial end of the inductor device to the second axial end of the inductor device.

7. The apparatus as in claim 1 , wherein the inductor device comprises:
core material disposed in the second layer, the core material being magnetically permeable ferromagnetic material; and
a first electrically conductive path extending through the core material from the first axial end of the inductor device to the second end axial end of the inductor device, presence of the core material rendering the first electrically conductive path to be a first inductive path.

8. The apparatus as in claim 7 , wherein the inductor device comprises:
a second electrically conductive path extending through the core material from the first axial end of the inductor device to the second axial end of the inductor device, presence of the core material rendering the second electrically conductive path to be a second inductive path.

9. The apparatus as in claim 8 , wherein the first inductive path and the second inductive path are connected in parallel.

10. The apparatus as in claim 1 , wherein the inductor device includes an electrically conductive path extending from a first surface at the first axial end of the inductor device to a second surface at the second axial end of the inductor device.

11. A method of fabricating a stack of components in a power converter, the method comprising: fabricating multiple switches to reside in a first layer of the stack, the multiple switches coupled to a first power interface of the stack to receive power from the first power interface; fabricating an inductor device to reside in a second layer of the stack, a first axial end of the inductor device electrically connected to the multiple switches; and fabricating a second power interface at a third layer in the stack, the second power interface electrically coupled to a second axial end of the inductor device, the second axial end of the inductor device operable to output an output current based on the received power, the second power interface operable to receive and output the output current from the second axial end of the inductor device.

12. The method as in claim 11 further comprising:
fabricating the first power interface to couple the multiple switches to an input voltage node and a reference voltage node.

13. The method as in claim 12 , wherein the multiple switches in the second layer are vertical field effect transistors disposed between the first power interface and the first axial end of the inductor device.

14. The method as in claim 11 further comprising:
fabricating the stack of components to be the power converter, wherein the power converter is operable to convert an input voltage received at the first power interface into the output current outputted from the second power interface; and
wherein the inductor device includes multiple inductive paths disposed in the stack between the first axial end and the second axial end.

15. The method as in claim 14 further comprising:
fabricating the multiple inductive paths to include a first inductive path and a second inductive path extending through the inductor device, the first inductive path disposed in a first phase of the power converter, the second inductive path disposed in a second phase of the power converter, a combination of the first phase and the second phase disposed in parallel to produce the output current.

16. The method as in claim 11 further comprising:
fabricating the inductor device to include an inductive path, the inductive path being a non-winding path extending from the first axial end of the inductor device to the second axial end of the inductor device.

17. The method as in claim 11 further comprising:
fabricating the second layer to include core material, the core material being magnetically permeable ferromagnetic material; and
fabricating a first electrically conductive path to extend through the core material from the first axial end of the inductor device to the second end axial end of the inductor device, presence of the core material rendering the first electrically conductive path to be a first inductive path.

18. The method as in claim 17 further comprising:
fabricating the inductor device to include a second electrically conductive path extending through the core material from the first axial end of the inductor device to the second axial end of the inductor device, presence of the core material rendering the second electrically conductive path to be a second inductive path.

19. The method as in claim 18 further comprising:
fabricating the first inductive path and the second inductive path to be connected in parallel.

20. The method as in claim 11 further comprising:
fabricating the inductor device to include an electrically conductive path extending from a first surface at the first axial end of the inductor device to a second surface at the second axial end of the inductor device.

Assignees

• Infineon Technologies Austria Ag

Inventors

• Leong Kennith K
• Kasper Matthias J
• Peluso Luca
• Deboy Gerald

Classifications

• H10W44/501

  Inductive arrangements (H10W44/20 takes precedence) · CPC title

• H10W72/877

  Bump connectors and die-attach connectors · CPC title

• H10W72/944

  Dispositions of multiple bond pads · CPC title

• H10W90/00

  Package configurations · CPC title

• H10W90/728

  between a chip and a stacked discrete passive device, e.g. resistors, capacitors or inductors · CPC title