An on-chip soft-start technique of current-mode DC-DC converter for biomedical applications

Dong Seok Kim, Jungmoon Kim, Jihwan Kim, Chulwoo Kim

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

7 Citations (Scopus)

Abstract

A compact soft-start technique, with an internal circuitry, is presented for the start-up of current mode DC-DC converters for biomedical applications. Examples of medical applications in DC-DC converters include bio-patch, wireless medical sensor node, RFID applications and medical instruments that must have a high stability. To achieve this, a soft-start circuit is proposed to prevent inrush current and output voltage overshoot, during the start-up of the current mode DC-DC converters. The output of the error amplifier is controlled by a stair-case waveform signal generator during the start-up period. The proposed soft-start circuit is fully integrated on chip for portable and wireless medical devices, so that the external components are not required, leading to a reduction in the PCB space and cost. The new soft-start circuit which is digitally-controlled unlike conventional ones was fabricated in a CMOS 0.35-μm process and occupies an active area of 0.19 mm2 with a 3.3 V supply voltage.

Original languageEnglish
Title of host publicationProceedings of the 2010 Asia Pacific Conference on Circuit and System, APCCAS 2010
Pages500-503
Number of pages4
DOIs
Publication statusPublished - 2010
Event2010 Asia Pacific Conference on Circuit and System, APCCAS 2010 - Kuala Lumpur, Malaysia
Duration: 2010 Dec 62010 Dec 9

Publication series

NameIEEE Asia-Pacific Conference on Circuits and Systems, Proceedings, APCCAS

Other

Other2010 Asia Pacific Conference on Circuit and System, APCCAS 2010
CountryMalaysia
CityKuala Lumpur
Period10/12/610/12/9

Keywords

  • Inrush current
  • biomedical applications
  • current mode DC-DC buck converter
  • soft-start
  • stable start-up

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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  • Cite this

    Kim, D. S., Kim, J., Kim, J., & Kim, C. (2010). An on-chip soft-start technique of current-mode DC-DC converter for biomedical applications. In Proceedings of the 2010 Asia Pacific Conference on Circuit and System, APCCAS 2010 (pp. 500-503). [5775038] (IEEE Asia-Pacific Conference on Circuits and Systems, Proceedings, APCCAS). https://doi.org/10.1109/APCCAS.2010.5775038