A 91% efficient 30V hybrid boost-SC converter based backlight LED driver in 180nm CMOS

Nilanjan Pal, Adam Fish, William McIntyre, Nathanael Griesert, Greg Winter, Travis Eichhorn, Robert Carl Nikolai Pilawa Podgurski, Pavan Kumar Hanumolu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper presents a new hybrid boost converter architecture for improving the efficiency of LED drivers used in mobile applications. By cascading a low-switching frequency time-interleaved series-parallel SC-stage with an inductive boost converter, we facilitate the use of lower voltage rated switches, thus greatly reducing the switching losses. Charge-sharing losses of the SC stage are minimized by soft-charging flying capacitors with the inductor of the boost stage. Fabricated in 180nm BCD process, the prototype converter generates 30V output voltage from a Li-ion battery source and can provide a load current in the range of 0 to 100mA with an excellent peak power efficiency of 91.15% at 30mA. Compared to state-of-the-art designs, the proposed converter achieves a 3 % improvement in peak power efficiency.

Original languageEnglish (US)
Title of host publication2020 IEEE Custom Integrated Circuits Conference, CICC 2020
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728160313
DOIs
StatePublished - Mar 2020
Event2020 IEEE Custom Integrated Circuits Conference, CICC 2020 - Boston, United States
Duration: Mar 22 2020Mar 25 2020

Publication series

NameProceedings of the Custom Integrated Circuits Conference
Volume2020-March
ISSN (Print)0886-5930

Conference

Conference2020 IEEE Custom Integrated Circuits Conference, CICC 2020
CountryUnited States
CityBoston
Period3/22/203/25/20

Keywords

  • DC-DC converter
  • hybrid converter
  • LED drivers

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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