PWM buck converter with >80% PCE in 45μA-to-4mA loads using analog-digital hybrid control for impiantale biomedical systems

Sung Yun Park, Jihyun Cho, Kyuseok Lee, Euisik Yoon

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

10 Citations (Scopus)

Abstract

Implantable biomedicai systems usually operate in energy-limited environments and exhibit large variation of power consumption ranging from constant low-power (bio-signal sensing) to sporadic high-power (stimulation and/or burst data transmission) [1]. Thus, energy-efficient switching power converters that can support a wide range of load variation are necessary to meet this requirement. Pulse frequency modulation (PFM) power converters can support this large load variation with a high power-conversion efficiency (PCE) [2]. However, their unpredictable switching noise degrades the power supply integrity and hence deteriorates the signal quality in implantable biomédical systems. Pulse-width modulation (PWM) power converters can provide predictable output spectrum, but their PCE in light loads suffers. Although various techniques have been explored over the past years [3-5], the PCE of the PWM converters is still not adequate for low current levels (<100uA) that most of the implantable biomedicai systems consume.

Original languageEnglish
Title of host publication2015 IEEE International Solid-State Circuits Conference, ISSCC 2015 - Digest of Technical Papers
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages218-219
Number of pages2
ISBN (Electronic)9781479962235
DOIs
Publication statusPublished - 2015 Mar 17
Event2015 62nd IEEE International Solid-State Circuits Conference, ISSCC 2015 - Digest of Technical Papers - San Francisco, United States
Duration: 2015 Feb 222015 Feb 26

Publication series

NameDigest of Technical Papers - IEEE International Solid-State Circuits Conference
Volume58
ISSN (Print)0193-6530

Other

Other2015 62nd IEEE International Solid-State Circuits Conference, ISSCC 2015 - Digest of Technical Papers
CountryUnited States
CitySan Francisco
Period15/2/2215/2/26

All Science Journal Classification (ASJC) codes

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

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