A novel asymmetrical three-level BUCK (ATL BUCK) converter for point-of-load (POL) application

Tianshu Liu; Hongliang Wang; Wenbo Liu; Yan Fei Liu; Laili Wang; Hamid Danesh; Doug Malcolm

doi:10.1109/ECCE.2015.7310378

A novel asymmetrical three-level BUCK (ATL BUCK) converter for point-of-load (POL) application

Tianshu Liu
, Hongliang Wang
, Wenbo Liu
, Yan Fei Liu
, Laili Wang
, Hamid Danesh
, Doug Malcolm

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

11 Scopus citations

Abstract

This paper presents a novel, non-isolated step-down converter for the application of point-of-load (POL) voltage regulation. The new converter can achieve higher power density by utilizing a much smaller inductor compared with Buck converter in the POL application. A smaller inductor is achieved by increasing the effective operating frequency applied to the inductor by a factor of 4 and at the same time reducing the voltage applied to the inductor while maintaining the same switching frequency of control switches. The new converter uses two groups of interleaving switches to increase the effective operating frequency on the inductor and a flying capacitor to reduce the voltage across the inductor. The new switch topology is adopted because inductors take up much more space than active switches in a high power density power module [1][2]. A 12V-to-1V/1A prototype demonstrates that the proposed topology can use an inductor that is 77% less inductance than a conventional Buck Converter (i.e. only 23% of Buck's inductance is used in the prototype). Since two groups of switches are interleaved, the RMS (Root Mean Square) current in each group of control switches is reduced to half and the hotspot on the control switches is split into two.

Original language	English
Title of host publication	2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	5096-5101
Number of pages	6
ISBN (Electronic)	9781467371506
DOIs	https://doi.org/10.1109/ECCE.2015.7310378
State	Published - 27 Oct 2015
Externally published	Yes
Event	7th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2015 - Montreal, Canada Duration: 20 Sep 2015 → 24 Sep 2015

Publication series

Name	2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015

Conference

Conference	7th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2015
Country/Territory	Canada
City	Montreal
Period	20/09/15 → 24/09/15

Keywords

DC-DC
Non-isolated Converter
PWM
Point-of-load
Three-Level Buck

Access to Document

10.1109/ECCE.2015.7310378

Cite this

Liu, T., Wang, H., Liu, W., Liu, Y. F., Wang, L., Danesh, H., & Malcolm, D. (2015). A novel asymmetrical three-level BUCK (ATL BUCK) converter for point-of-load (POL) application. In 2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015 (pp. 5096-5101). Article 7310378 (2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ECCE.2015.7310378

@inproceedings{1b4344c8472b47dd9ff2352ead2e6028,

title = "A novel asymmetrical three-level BUCK (ATL BUCK) converter for point-of-load (POL) application",

abstract = "This paper presents a novel, non-isolated step-down converter for the application of point-of-load (POL) voltage regulation. The new converter can achieve higher power density by utilizing a much smaller inductor compared with Buck converter in the POL application. A smaller inductor is achieved by increasing the effective operating frequency applied to the inductor by a factor of 4 and at the same time reducing the voltage applied to the inductor while maintaining the same switching frequency of control switches. The new converter uses two groups of interleaving switches to increase the effective operating frequency on the inductor and a flying capacitor to reduce the voltage across the inductor. The new switch topology is adopted because inductors take up much more space than active switches in a high power density power module [1][2]. A 12V-to-1V/1A prototype demonstrates that the proposed topology can use an inductor that is 77\% less inductance than a conventional Buck Converter (i.e. only 23\% of Buck's inductance is used in the prototype). Since two groups of switches are interleaved, the RMS (Root Mean Square) current in each group of control switches is reduced to half and the hotspot on the control switches is split into two.",

keywords = "DC-DC, Non-isolated Converter, PWM, Point-of-load, Three-Level Buck",

author = "Tianshu Liu and Hongliang Wang and Wenbo Liu and Liu, \{Yan Fei\} and Laili Wang and Hamid Danesh and Doug Malcolm",

note = "Publisher Copyright: {\textcopyright} 2015 IEEE.; 7th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2015 ; Conference date: 20-09-2015 Through 24-09-2015",

year = "2015",

month = oct,

day = "27",

doi = "10.1109/ECCE.2015.7310378",

language = "英语",

series = "2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

pages = "5096--5101",

booktitle = "2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015",

}

Liu, T, Wang, H, Liu, W, Liu, YF, Wang, L, Danesh, H & Malcolm, D 2015, A novel asymmetrical three-level BUCK (ATL BUCK) converter for point-of-load (POL) application. in 2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015., 7310378, 2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015, Institute of Electrical and Electronics Engineers Inc., pp. 5096-5101, 7th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2015, Montreal, Canada, 20/09/15. https://doi.org/10.1109/ECCE.2015.7310378

A novel asymmetrical three-level BUCK (ATL BUCK) converter for point-of-load (POL) application. / Liu, Tianshu; Wang, Hongliang; Liu, Wenbo et al.
2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015. Institute of Electrical and Electronics Engineers Inc., 2015. p. 5096-5101 7310378 (2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - A novel asymmetrical three-level BUCK (ATL BUCK) converter for point-of-load (POL) application

AU - Liu, Tianshu

AU - Wang, Hongliang

AU - Liu, Wenbo

AU - Liu, Yan Fei

AU - Wang, Laili

AU - Danesh, Hamid

AU - Malcolm, Doug

PY - 2015/10/27

Y1 - 2015/10/27

N2 - This paper presents a novel, non-isolated step-down converter for the application of point-of-load (POL) voltage regulation. The new converter can achieve higher power density by utilizing a much smaller inductor compared with Buck converter in the POL application. A smaller inductor is achieved by increasing the effective operating frequency applied to the inductor by a factor of 4 and at the same time reducing the voltage applied to the inductor while maintaining the same switching frequency of control switches. The new converter uses two groups of interleaving switches to increase the effective operating frequency on the inductor and a flying capacitor to reduce the voltage across the inductor. The new switch topology is adopted because inductors take up much more space than active switches in a high power density power module [1][2]. A 12V-to-1V/1A prototype demonstrates that the proposed topology can use an inductor that is 77% less inductance than a conventional Buck Converter (i.e. only 23% of Buck's inductance is used in the prototype). Since two groups of switches are interleaved, the RMS (Root Mean Square) current in each group of control switches is reduced to half and the hotspot on the control switches is split into two.

AB - This paper presents a novel, non-isolated step-down converter for the application of point-of-load (POL) voltage regulation. The new converter can achieve higher power density by utilizing a much smaller inductor compared with Buck converter in the POL application. A smaller inductor is achieved by increasing the effective operating frequency applied to the inductor by a factor of 4 and at the same time reducing the voltage applied to the inductor while maintaining the same switching frequency of control switches. The new converter uses two groups of interleaving switches to increase the effective operating frequency on the inductor and a flying capacitor to reduce the voltage across the inductor. The new switch topology is adopted because inductors take up much more space than active switches in a high power density power module [1][2]. A 12V-to-1V/1A prototype demonstrates that the proposed topology can use an inductor that is 77% less inductance than a conventional Buck Converter (i.e. only 23% of Buck's inductance is used in the prototype). Since two groups of switches are interleaved, the RMS (Root Mean Square) current in each group of control switches is reduced to half and the hotspot on the control switches is split into two.

KW - DC-DC

KW - Non-isolated Converter

KW - PWM

KW - Point-of-load

KW - Three-Level Buck

UR - https://www.scopus.com/pages/publications/84963632235

U2 - 10.1109/ECCE.2015.7310378

DO - 10.1109/ECCE.2015.7310378

M3 - 会议稿件

AN - SCOPUS:84963632235

T3 - 2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015

SP - 5096

EP - 5101

BT - 2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 7th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2015

Y2 - 20 September 2015 through 24 September 2015

ER -

Liu T, Wang H, Liu W, Liu YF, Wang L, Danesh H et al. A novel asymmetrical three-level BUCK (ATL BUCK) converter for point-of-load (POL) application. In 2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015. Institute of Electrical and Electronics Engineers Inc. 2015. p. 5096-5101. 7310378. (2015 IEEE Energy Conversion Congress and Exposition, ECCE 2015). doi: 10.1109/ECCE.2015.7310378

A novel asymmetrical three-level BUCK (ATL BUCK) converter for point-of-load (POL) application

Abstract

Publication series

Conference

Keywords

Access to Document

Other files and links

Fingerprint

Cite this