High efficiency on si-integrated microtransformers for isolated power conversion applications

Ningning Wang; Rais Miftakhutdinov; Santosh Kulkarni; Cian O'Mathuna

doi:10.1109/TPEL.2014.2372759

High efficiency on si-integrated microtransformers for isolated power conversion applications

Ningning Wang
, Rais Miftakhutdinov
, Santosh Kulkarni
, Cian O'Mathuna

Tyndall IPES (Integrated Power)

Research output: Contribution to journal › Article › peer-review

Abstract

This paper details the design, fabrication, and characterization of silicon-integrated microtransformers for isolated bias supplies. Racetrack-shaped microtransformers were designed and fabricated using the advanced double-layer metal (DLM) microfabrication process. The DLM devices have high inductance density of more than 80 nH/mm² with an efficiency of approximately 78.2% at 20 MHz at 0.5-W output. This is the highest efficiency and power density reported for an integrated transformer in the literature. The inductance drop is less than 20% with a bias current of 0.35 A with up to 6-kV dc breakdown voltage achieved.

Original language	English
Article number	A18
Pages (from-to)	5746-5754
Number of pages	9
Journal	IEEE Transactions on Power Electronics
Volume	30
Issue number	10
DOIs	https://doi.org/10.1109/TPEL.2014.2372759
Publication status	Published - 1 Oct 2015

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 9 Industry, Innovation, and Infrastructure

Keywords

integrated circuits
isolation technology
magnetic cores
Magnetic devices
power conversion
power transformers
switched-mode power supply

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10.1109/TPEL.2014.2372759

Cite this

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title = "High efficiency on si-integrated microtransformers for isolated power conversion applications",

abstract = "This paper details the design, fabrication, and characterization of silicon-integrated microtransformers for isolated bias supplies. Racetrack-shaped microtransformers were designed and fabricated using the advanced double-layer metal (DLM) microfabrication process. The DLM devices have high inductance density of more than 80 nH/mm2 with an efficiency of approximately 78.2\% at 20 MHz at 0.5-W output. This is the highest efficiency and power density reported for an integrated transformer in the literature. The inductance drop is less than 20\% with a bias current of 0.35 A with up to 6-kV dc breakdown voltage achieved.",

keywords = "integrated circuits, isolation technology, magnetic cores, Magnetic devices, power conversion, power transformers, switched-mode power supply",

author = "Ningning Wang and Rais Miftakhutdinov and Santosh Kulkarni and Cian O'Mathuna",

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AU - Miftakhutdinov, Rais

AU - Kulkarni, Santosh

AU - O'Mathuna, Cian

PY - 2015/10/1

Y1 - 2015/10/1

N2 - This paper details the design, fabrication, and characterization of silicon-integrated microtransformers for isolated bias supplies. Racetrack-shaped microtransformers were designed and fabricated using the advanced double-layer metal (DLM) microfabrication process. The DLM devices have high inductance density of more than 80 nH/mm2 with an efficiency of approximately 78.2% at 20 MHz at 0.5-W output. This is the highest efficiency and power density reported for an integrated transformer in the literature. The inductance drop is less than 20% with a bias current of 0.35 A with up to 6-kV dc breakdown voltage achieved.

AB - This paper details the design, fabrication, and characterization of silicon-integrated microtransformers for isolated bias supplies. Racetrack-shaped microtransformers were designed and fabricated using the advanced double-layer metal (DLM) microfabrication process. The DLM devices have high inductance density of more than 80 nH/mm2 with an efficiency of approximately 78.2% at 20 MHz at 0.5-W output. This is the highest efficiency and power density reported for an integrated transformer in the literature. The inductance drop is less than 20% with a bias current of 0.35 A with up to 6-kV dc breakdown voltage achieved.

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KW - isolation technology

KW - magnetic cores

KW - Magnetic devices

KW - power conversion

KW - power transformers

KW - switched-mode power supply

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High efficiency on si-integrated microtransformers for isolated power conversion applications

Abstract

UN SDGs

Keywords

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