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Title: Fully integrated multi-phase buck converter with coupled air core inductors

Abstract

A multi-phase buck switching converter having grouped pairs of phases, each phase using two magnetically coupled air-core inductors. For each group, a first driver circuit controlling switching of a first power transistor switching circuit coupled to a first air-core inductor output for driving an output load at the first phase. A second driver circuit controlling switching of a second power transistor switching circuit coupled to a second air-core inductor output for driving said output load at the second phase. The first and second phases are spaced 180° apart. The coupled air-core inductors per group of such orientation, separation distance and mutual inductance polarity relative to each other such that magnetic coupling between the two or more inductors at each phase results in a net increase in effective inductance per unit volume. Each air-core inductor is a metal slab of defined length, height and thickness formed using back-end-of-line semiconductor manufacturing process.

Inventors:
; ; ;
Issue Date:
Research Org.:
International Business Machines Corp., Armonk, NY (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1840426
Patent Number(s):
11114944
Application Number:
16/707,186
Assignee:
International Business Machines Corporation (Armonk, NY)
Patent Classifications (CPCs):
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01F - MAGNETS
H - ELECTRICITY H02 - GENERATION H02M - APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS
DOE Contract Number:  
95083063
Resource Type:
Patent
Resource Relation:
Patent File Date: 12/09/2019
Country of Publication:
United States
Language:
English

Citation Formats

Zhang, Xin, Takken, Todd E., Wang, Naigang, and Chang, Leland. Fully integrated multi-phase buck converter with coupled air core inductors. United States: N. p., 2021. Web.
Zhang, Xin, Takken, Todd E., Wang, Naigang, & Chang, Leland. Fully integrated multi-phase buck converter with coupled air core inductors. United States.
Zhang, Xin, Takken, Todd E., Wang, Naigang, and Chang, Leland. Tue . "Fully integrated multi-phase buck converter with coupled air core inductors". United States. https://www.osti.gov/servlets/purl/1840426.
@article{osti_1840426,
title = {Fully integrated multi-phase buck converter with coupled air core inductors},
author = {Zhang, Xin and Takken, Todd E. and Wang, Naigang and Chang, Leland},
abstractNote = {A multi-phase buck switching converter having grouped pairs of phases, each phase using two magnetically coupled air-core inductors. For each group, a first driver circuit controlling switching of a first power transistor switching circuit coupled to a first air-core inductor output for driving an output load at the first phase. A second driver circuit controlling switching of a second power transistor switching circuit coupled to a second air-core inductor output for driving said output load at the second phase. The first and second phases are spaced 180° apart. The coupled air-core inductors per group of such orientation, separation distance and mutual inductance polarity relative to each other such that magnetic coupling between the two or more inductors at each phase results in a net increase in effective inductance per unit volume. Each air-core inductor is a metal slab of defined length, height and thickness formed using back-end-of-line semiconductor manufacturing process.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2021},
month = {9}
}

Works referenced in this record:

Dc-DC Buck Circuit
patent-application, July 2014


Method and apparatus for reducing overshoot and undershoot using a reconfigurable inductor for switching mode voltage
patent-application, June 2017


Two-Phase Coupled Inductors Which Promote Improved Printed Circuit Board Layout
patent-application, June 2011


High Frequency Integrated Point-of-Load Power Converter with Embedded Inductor Substrate
patent-application, March 2015


Multi-Phase Hysteretic Buck Switching Regulator
patent-application, September 2016


Isolator Integrated Circuits with Package Structure Cavity and Fabrication Methods
patent-application, July 2018


High Isolation Integrated Inductor and Method Thereof
patent-application, July 2019


Slab Inductor Device Providing Efficient On-Chip Supply Voltage Conversion and Regulation
patent-application, October 2015


Multi-phase buck converter with a plurality of coupled inductors
patent, November 2008