A 48-V Wide-Vin 9-25-MHz Resonant DC-DC Converter

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

Autoren

Externe Organisationen

  • Robert Bosch GmbH
  • Hochschule Reutlingen
Forschungs-netzwerk anzeigen

Details

OriginalspracheEnglisch
Seiten (von - bis)1936-1944
Seitenumfang9
FachzeitschriftIEEE Journal of Solid-State Circuits
Jahrgang53
Ausgabenummer7
Frühes Online-Datum9 Mai 2018
PublikationsstatusVeröffentlicht - Juli 2018

Abstract

This paper presents a wide- V in step-down parallel-resonant converter (PRC), comprising an integrated 5-bit capacitor array and a 300-nH resonant coil, placed in parallel to a conventional buck converter. Soft-switching resonant converters are beneficial for high- V in multi-MHz converters to reduce dominant switching losses, enabling higher switching frequencies. The output filter inductor is optimized based on an empirical study of available inductors. The study shows that faster switching significantly reduces not only the inductor value but also volume, price, and even the inductor losses. In addition, unlike conventional resonant concepts, soft-switching control as part of the proposed PRC eliminates input voltage-dependent losses over a wide operating range, resulting in 76.3% peak efficiency. At V in=48 V, a loss reduction of 35% is achieved compared with the conventional buck converter. Adjusting an integrated capacitor array, and selecting the number of oscillation periods, keeps the switching frequency within a narrow range. This ensures high efficiency across a wide range of V in = 12-48 V, 100-500-mA load, and 5-V output at up to 25-MHz switching frequency. Thanks to the low output current ripple, the output capacitor can be as small as 50 nF.

ASJC Scopus Sachgebiete

Zitieren

A 48-V Wide-Vin 9-25-MHz Resonant DC-DC Converter. / Wittmann, Jürgen; Funk, Tobias; Rosahl, Thoralf et al.
in: IEEE Journal of Solid-State Circuits, Jahrgang 53, Nr. 7, 07.2018, S. 1936-1944.

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

Wittmann J, Funk T, Rosahl T, Wicht B. A 48-V Wide-Vin 9-25-MHz Resonant DC-DC Converter. IEEE Journal of Solid-State Circuits. 2018 Jul;53(7):1936-1944. Epub 2018 Mai 9. doi: 10.1109/jssc.2018.2827953
Wittmann, Jürgen ; Funk, Tobias ; Rosahl, Thoralf et al. / A 48-V Wide-Vin 9-25-MHz Resonant DC-DC Converter. in: IEEE Journal of Solid-State Circuits. 2018 ; Jahrgang 53, Nr. 7. S. 1936-1944.
Download
@article{1f8c63bfd6b64419bd5501ad56bda5f1,
title = "A 48-V Wide-Vin 9-25-MHz Resonant DC-DC Converter",
abstract = "This paper presents a wide- V in step-down parallel-resonant converter (PRC), comprising an integrated 5-bit capacitor array and a 300-nH resonant coil, placed in parallel to a conventional buck converter. Soft-switching resonant converters are beneficial for high- V in multi-MHz converters to reduce dominant switching losses, enabling higher switching frequencies. The output filter inductor is optimized based on an empirical study of available inductors. The study shows that faster switching significantly reduces not only the inductor value but also volume, price, and even the inductor losses. In addition, unlike conventional resonant concepts, soft-switching control as part of the proposed PRC eliminates input voltage-dependent losses over a wide operating range, resulting in 76.3% peak efficiency. At V in=48 V, a loss reduction of 35% is achieved compared with the conventional buck converter. Adjusting an integrated capacitor array, and selecting the number of oscillation periods, keeps the switching frequency within a narrow range. This ensures high efficiency across a wide range of V in = 12-48 V, 100-500-mA load, and 5-V output at up to 25-MHz switching frequency. Thanks to the low output current ripple, the output capacitor can be as small as 50 nF. ",
keywords = "Buck converter, inductors, multi-MHz switching, resonant dc-dc converter, soft-switching",
author = "J{\"u}rgen Wittmann and Tobias Funk and Thoralf Rosahl and Bernhard Wicht",
note = "Publisher Copyright: {\textcopyright} 2018 IEEE.",
year = "2018",
month = jul,
doi = "10.1109/jssc.2018.2827953",
language = "English",
volume = "53",
pages = "1936--1944",
journal = "IEEE Journal of Solid-State Circuits",
issn = "0018-9200",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "7",

}

Download

TY - JOUR

T1 - A 48-V Wide-Vin 9-25-MHz Resonant DC-DC Converter

AU - Wittmann, Jürgen

AU - Funk, Tobias

AU - Rosahl, Thoralf

AU - Wicht, Bernhard

N1 - Publisher Copyright: © 2018 IEEE.

PY - 2018/7

Y1 - 2018/7

N2 - This paper presents a wide- V in step-down parallel-resonant converter (PRC), comprising an integrated 5-bit capacitor array and a 300-nH resonant coil, placed in parallel to a conventional buck converter. Soft-switching resonant converters are beneficial for high- V in multi-MHz converters to reduce dominant switching losses, enabling higher switching frequencies. The output filter inductor is optimized based on an empirical study of available inductors. The study shows that faster switching significantly reduces not only the inductor value but also volume, price, and even the inductor losses. In addition, unlike conventional resonant concepts, soft-switching control as part of the proposed PRC eliminates input voltage-dependent losses over a wide operating range, resulting in 76.3% peak efficiency. At V in=48 V, a loss reduction of 35% is achieved compared with the conventional buck converter. Adjusting an integrated capacitor array, and selecting the number of oscillation periods, keeps the switching frequency within a narrow range. This ensures high efficiency across a wide range of V in = 12-48 V, 100-500-mA load, and 5-V output at up to 25-MHz switching frequency. Thanks to the low output current ripple, the output capacitor can be as small as 50 nF.

AB - This paper presents a wide- V in step-down parallel-resonant converter (PRC), comprising an integrated 5-bit capacitor array and a 300-nH resonant coil, placed in parallel to a conventional buck converter. Soft-switching resonant converters are beneficial for high- V in multi-MHz converters to reduce dominant switching losses, enabling higher switching frequencies. The output filter inductor is optimized based on an empirical study of available inductors. The study shows that faster switching significantly reduces not only the inductor value but also volume, price, and even the inductor losses. In addition, unlike conventional resonant concepts, soft-switching control as part of the proposed PRC eliminates input voltage-dependent losses over a wide operating range, resulting in 76.3% peak efficiency. At V in=48 V, a loss reduction of 35% is achieved compared with the conventional buck converter. Adjusting an integrated capacitor array, and selecting the number of oscillation periods, keeps the switching frequency within a narrow range. This ensures high efficiency across a wide range of V in = 12-48 V, 100-500-mA load, and 5-V output at up to 25-MHz switching frequency. Thanks to the low output current ripple, the output capacitor can be as small as 50 nF.

KW - Buck converter

KW - inductors

KW - multi-MHz switching

KW - resonant dc-dc converter

KW - soft-switching

UR - http://www.scopus.com/inward/record.url?scp=85046805517&partnerID=8YFLogxK

U2 - 10.1109/jssc.2018.2827953

DO - 10.1109/jssc.2018.2827953

M3 - Article

VL - 53

SP - 1936

EP - 1944

JO - IEEE Journal of Solid-State Circuits

JF - IEEE Journal of Solid-State Circuits

SN - 0018-9200

IS - 7

ER -

Von denselben Autoren