US 2026/0011481 A1Published application

Power module

AssigneeMonolithic Power Systems, Inc.

InventorsHao-Shiang Huang, Kuan-Hung Wu, Chia-Hsi Chang

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Abstract

A power module for a switching circuit is provided. The power module includes a substrate, power devices, a magnetic component, a metallic coating, and a heat spreader. The magnetic component includes a magnetic core, a primary winding, and a secondary winding. The metallic coating is covered on the substrate. The metallic coating includes a first portion and a second portion, the first portion is covered on the side edge surface of the substrate, the second portion is covered on a portion of the top surface of the substrate, and the second portion is connected to the first portion. The heat spreader is disposed on top of the plurality of power devices. The heat spreader has at least one supporting terminal connected to the top surface of the substrate, and one of the at least one supporting terminals is connected to the metallic coating.

Claims20

Dependent claims

A power module, comprising:

a substrate having a top surface, a bottom surface, and a side edge surface, wherein the side edge surface extends between the top surface and the bottom surface;
a plurality of power devices disposed on the top surface of the substrate;
a magnetic component disposed on the substrate, wherein the magnetic component includes a magnetic core, a primary winding, and a secondary winding, and the primary winding and the secondary winding are wound on the magnetic core;
a metallic coating covered on the substrate, wherein the metallic coating includes a first portion and a second portion, the first portion is covered on the side edge surface of the substrate, and the second portion is covered on a portion of the top surface of the substrate, and the second portion is connected to the first portion;
and
a heat spreader disposed on top of the plurality of power devices, wherein the heat spreader has at least one supporting terminal connected to the top surface of the substrate, and one of the at least one supporting terminals is connected to the metallic coating.

3 more elements

A power module, comprising:

a substrate having a top surface, a bottom surface, and a side edge surface, wherein the side edge surface extends between the top surface and the bottom surface;
a plurality of power devices disposed on the top surface of the substrate;
and
a magnetic component disposed on the substrate, wherein the magnetic component includes a magnetic core, a primary winding, and a secondary winding, and the primary winding and the secondary winding are wound on the magnetic core;
wherein the primary winding is formed on a first set of PCB layers, the secondary winding is formed on a second set of PCB layers, the first set of PCB layers and the second set of PCB layers are stacked vertically to form a winding stack;
wherein the winding stack includes first vias and second vias, each of the first vias is configured to electrically connect traces of the primary winding on different PCB layers, and each of the second vias is configured to electrically connect traces of the secondary winding on different PCB layers;
wherein for each of the first set of PCB layers, each of the first vias has a first through-hole and a first pad surrounded the first through-hole, and for each of the second set of PCB layers, each of the second vias has a second through-hole and a second pad surrounded the second through-hole.

4 more elements

A power module, comprising:

a substrate having a top surface, a bottom surface, and a side edge surface, wherein the side edge surface extends between the top surface and the bottom surface;
a plurality of power devices disposed on the top surface of the substrate;
a magnetic component disposed on the substrate, wherein the magnetic component includes a magnetic core, a primary winding, and a secondary winding, and the primary winding and the secondary winding are wound on the magnetic core;
a metallic coating covered on the side edge surface of the substrate;
and
a heat spreader disposed on top of the plurality of power devices, wherein the heat spreader is connected to the metallic coating.

3 more elements

Dependencies are inferred from the claim text.