A 95.2% efficiency dual-path DC-DC step-up converter with continuous output current delivery and low voltage ripple

Se Un Shin, Yeunhee Huh, Yongmin Ju, Sungwon Choi, Changsik Shin, Young Jin Woo, Minseong Choi, Se Hong Park, Young Hoon Sohn, Min Woo Ko, Youngsin Jo, Hyunki Han, Hyung Min Lee, Sung Wan Hong, Wanyuan Qu, Gyu Hyeong Cho

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

5 Citations (Scopus)

Abstract

DC-DC boost converters are widely used to increase the supply voltage in various applications, including LED drivers, energy harvesting, etc. [1-5]. The conventional boost converter (CBC) is shown in Fig. 27.5.1, where the switches S 1 and S 2 are turned on and off alternately at φ 1 and φ 2 , respectively, and the inductor current (I L ) is built up and delivered to the output. There are some critical issues in CBC because the output delivery current (I S ) is not continuous. As a result, the I L can be much larger than the load current (I LOAD ) as φ 1 becomes longer. Since a bulky-size inductor having a low parasitic DC resistance (R dcr ) is not usable for mobile applications with a strictly limited space, this large I L results in significant conduction loss in the large R DCR of a small-size inductor. Another issue is that the discontinuous I S in φ 2 causes large voltage ripple (AV OUT ) at the output. Moreover, switching spike voltages can cause over-voltage stress on the loading block due to large di/dt of I S combined with parasitic inductances of the GND path.

Original languageEnglish
Title of host publication2018 IEEE International Solid-State Circuits Conference, ISSCC 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages430-432
Number of pages3
ISBN (Electronic)9781509049394
DOIs
Publication statusPublished - 2018 Mar 8
Event65th IEEE International Solid-State Circuits Conference, ISSCC 2018 - San Francisco, United States
Duration: 2018 Feb 112018 Feb 15

Publication series

NameDigest of Technical Papers - IEEE International Solid-State Circuits Conference
Volume61
ISSN (Print)0193-6530

Other

Other65th IEEE International Solid-State Circuits Conference, ISSCC 2018
CountryUnited States
CitySan Francisco
Period18/2/1118/2/15

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

Cite this

Shin, S. U., Huh, Y., Ju, Y., Choi, S., Shin, C., Woo, Y. J., Choi, M., Park, S. H., Sohn, Y. H., Ko, M. W., Jo, Y., Han, H., Lee, H. M., Hong, S. W., Qu, W., & Cho, G. H. (2018). A 95.2% efficiency dual-path DC-DC step-up converter with continuous output current delivery and low voltage ripple. In 2018 IEEE International Solid-State Circuits Conference, ISSCC 2018 (pp. 430-432). (Digest of Technical Papers - IEEE International Solid-State Circuits Conference; Vol. 61). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ISSCC.2018.8310368