A 6.78MHz Wireless Power Transfer System with Maximum Power Tracking over Wide Load Range

You Xin Ling, Tsung Heng Tsai*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

A 6.78MHz wireless transfer system with a maximum power tracking controller (MPTC). The controller effectively tracks the maximum power points over wide loading range, and lessens the output voltage ripples at the same time. Thus, the size of capacitors at the output of the rectifier can be reduced while achieving high overall power efficiency over wide load range. This chip is manufactured in UMC 0.18 μm 1P6M CMOS process. Measurement results show that the overall power efficiency is maintained above 29% with a load impedance ranging from 80 Ω to 500 Ω. At a load impedance of 500 Ω, the overall power efficiency is higher by 14%, compared to that without the proposed MPTC. This chip occupies 0.93 mm2 and the power conversion efficiency is 78%.

Original languageEnglish
Title of host publication2021 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2021 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781665419154
DOIs
StatePublished - 19 Apr 2021
Event2021 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2021 - Hsinchu, Taiwan
Duration: 19 Apr 202122 Apr 2021

Publication series

Name2021 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2021 - Proceedings

Conference

Conference2021 International Symposium on VLSI Design, Automation and Test, VLSI-DAT 2021
Country/TerritoryTaiwan
CityHsinchu
Period19/04/2122/04/21

Keywords

  • Maximum Power Tracking
  • Power Control Management
  • Wireless Power Transfer System

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