MULTI-STAGE PERMANENT MAGNET STRUCTURE AND INTEGRATED POWER INDUCTORS

摘要

Apparatuses and methods directed to multi-stage permanent magnet and implementations of a permanent magnet on-chip power inductor. Various circuit models, design considerations and simulation results are described. The multi-stage permanent magnet includes layers with uniform or non-uniform magnets used to control the flux distribution. The permanent magnet on-chip power converter for DC-DC switching power converters that may include a top ferrite layer, a spiral winding layer, a permanent magnet layer, a bottom ferrite layer, and a substrate layer. The permanent magnet layer may comprise a multi-stage structure wherein each stage has a decreasing area as compared to an immediate lower stage. A method of manufacturing a Permanent On-Chip Power Inductor (PMOI) is also disclosed.

主权项

1. A power inductor for a DC-DC power converter, comprising:
a magnetic core; at least one winding wound about the magnetic core; and a permanent magnet disposed within the magnetic core.