Power inductor, preparation method of power inductor, and system in package module
View Patent ↗A power inductor includes a winding and a metal magnetic powder core. The metal magnetic powder core is configured to support the winding, and the winding uses a metal conductive sheet. During assembly, the metal magnetic powder core is integrated with the winding through pressing, the metal magnetic powder core wraps the winding, and the metal magnetic powder core is insulated from the winding. The winding has a first pin and a second pin, and the first pin and the second pin are exposed on different surfaces of the metal magnetic powder core. Pins are separately disposed on two different surfaces of the power inductor. In addition, the winding is formed by integrally pressing the metal conductive sheet and the metal magnetic powder core.
1 . A power inductor, comprising:
a winding comprising:
a body structure comprising a first end and a second end;
a first connection structure connected to the first end and comprising a first pin; and
a second connection structure connected to the second end and comprising a second pin and a third pin, wherein the winding comprises a stamped bare copper sheet; and
a metal magnetic powder core that is pressed to the winding,
wherein the metal magnetic powder core is insulated from the winding,
wherein the first connection structure extends to a first external surface of the metal magnetic powder core,
wherein the second connection structure extends to a second external surface of the metal magnetic powder core as the second pin and extends to the first external surface of the metal magnetic powder core as the third pin,
wherein the first pin and the third pin are exposed on the first external surface, and
wherein the second pin is exposed on the second external surface.
2 . The power inductor of claim 1 , wherein a first length direction of the first connection structure and a second length direction of the second connection structure are perpendicular to a third length direction of the body structure, wherein the first length direction and the second length direction are perpendicular to the first external surface and the second external surface, and wherein the third length direction of the body structure is parallel to the first external surface and the second external surface.
3 . The power inductor of claim 1 , further comprising an insulation layer on a surface of the metal magnetic powder core that contacts and wraps the winding.
4 . The power inductor of claim 1 , further comprising:
a first current path length from the first pin to the second pin; and
a second current path length from the third pin to the second pin, wherein the first current path length is less than the second current path length.
5 . The power inductor of claim 1 , wherein the body structure is Z-shaped, wherein the first connection structure is connected to the first end, and wherein the second connection structure is connected to the second end.
6 . The power inductor of claim 1 , further comprising a plurality of windings, wherein the windings are arranged in a single row.
7 . A system in package module, comprising:
a circuit board; and
a power inductor disposed on the circuit board, wherein the power inductor comprises:
a winding comprising:
a body structure comprising a first end and a second end;
a first connection structure connected to the first end and comprising a first pin; and
a second connection structure connected to the second end and comprising a second pin and a third pin, wherein the winding comprises a stamped bare copper sheet; and
a metal magnetic powder core that is pressed to the winding,
wherein the metal magnetic powder core is insulated from the winding,
wherein the first connection structure extends to a first external surface of the metal magnetic powder core,
wherein the second connection structure extends to a second external surface of the metal magnetic powder core as the second pin and extends to the first external surface of the metal magnetic powder core as the third pin,
wherein the first pin and the third pin are exposed on the first external surface, and
wherein the second pin is exposed on the second external surface.
8 . The system in package module of claim 7 , wherein the power inductor further comprises a plurality of windings, and wherein the windings are arranged in a single row.
9 . The system in package module of claim 7 , wherein a first length direction of the first connection structure and a second length direction of the second connection structure are perpendicular to a third length direction of the body structure, wherein the first length direction and the second length direction are perpendicular to the first external surface and the second external surface, and wherein the third length direction of the body structure is parallel to the first external surface and the second external surface.
10 . The system in package module of claim 7 , wherein the body structure is Z-shaped, wherein the first connection structure is connected to the first end, and wherein the second connection structure is connected to the second end.
11 . The system in package module of claim 7 , further comprising an insulation layer on a surface of the metal magnetic powder core that contacts and wraps the winding.
12 . The system in package module of claim 7 , wherein the power inductor further comprises:
a first current path length from the first pin to the second pin; and
a second current path length from the third pin to the second pin, wherein the first current path length is less than the second current path length.
13 . The power inductor of claim 1 , wherein the first pin and the third pin are located on a same surface of the metal magnetic powder core and arranged at an interval.
14 . The power inductor of claim 1 , wherein the power inductor is configured to match a system in package module comprising components arranged in a vertical direction.
15 . The power inductor of claim 6 , wherein the windings share the metal magnetic powder core.
16 . The power inductor of claim 1 , wherein the metal magnetic core is pressed into one or more of a cylinder, a cylindroid, a cube, or a trapezoid.
17 . The system in package module of claim 7 , wherein the first pin and the third pin are located on a same surface of the metal magnetic powder core and arranged at an interval.
18 . The system in package module of claim 7 , wherein the power inductor is configured to match components of the circuit board arranged in a vertical direction.
19 . The system in package module of claim 8 , wherein the windings share the metal magnetic powder core.
20 . The system in package module of claim 7 , wherein the metal magnetic core is pressed into one or more of a cylinder, a cylindroid, a cube, or a trapezoid.