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Development of a general-purpose system-on-chip power supplies

Research Project

Project/Area Number 11650405
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 情報通信工学
Research InstitutionKumamoto National College of Technology

Principal Investigator

UENO Fumio  Kumamoto National College of Technology, President, 校長 (10040453)

Co-Investigator(Kenkyū-buntansha) OOTA Ichirou  Kumamoto National College of Technology, Department of Information and Communication Engineering, Professor, 情報通信工学科, 教授 (60149995)
Project Period (FY) 1999 – 2000
Project Status Completed (Fiscal Year 2000)
Budget Amount *help
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2000: ¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 1999: ¥2,000,000 (Direct Cost: ¥2,000,000)
KeywordsSystem-on-chip / Switched-capacitor transformer / General-purpose power supply / Ring type / Small-size and light-weight / State space averaging method / Switching power supplies
Research Abstract

Ring type switched-capacitor power supplies can be changed their step-up or step-down voltage ratio by controlling the pattern of their clocks without changing the circuit configurations. Their characteristics using several charge-transfer capacitors are verified by experiments and theoretical analyses. In the case where the number of the charge-transfer capacitors is increased form several tens to a few hundred, the characteristics are verified with the view for IC implementation in this project. The limit of the characteristics are clarified when the number of the charge-transfer capacitors is increased, under the conditions that the area of each integrated circuit is the same, namely the total capacitance and the total on-resistance, which means the on-resistance if all the switches are connected in parallel, are the same.
In the case of a series-parallel type SC transformer, assuming that the values of all charge-transfer capacitors and on-resistances of all switches are the same, t … More he voltage waveform across each charge-transfer capacitor is the same. Then, the element number of the state vector does not increase, even if the number of the charge-transfer capacitors n is increased, and it is easy to obtain the output resistance as a general case. On the other hand, in the case of a ring type SC transformer, the voltage waveform across each charge-transfer capacitor is not the same, even if the values of all charge-transfer capacitors and on-resistances of all switches are the same. Then it is difficult to derive the output resistance as a general case.
In this project, a new simple method for deriving the output resistance is presented and the characteristics of a ring type SC transformer are derived as a general case. As the result, although the ring type SC transformer has a flexible step-up or step-down ratio, its output resistance is increased by the second power of the step-up ratio. In the future, these theoretical results will be verified by the experiments. Less

Report

(3 results)
  • 2000 Annual Research Report   Final Research Report Summary
  • 1999 Annual Research Report

Research Products

(24 results)

All Other

All Publications (24 results)

  • [Publications] Noriaki Hara: "Ring type switched-capacitor waveform generators"2000 International Symposium on Nonlinear Theory and its Applications(NOLTA 2000). Vol.1. 343-346 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Ichrou Oota: "A general method for deriving output resistances of serial fixed type switched-capacitor power supplies"2000 IEEE International Symposium on Circuits and Systems(ISCAS-2000). Vol.III. 503-506 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Noriaki Hara: "Ring type switched-capacitor transformer and its applications"2000 IEEE International Symposium on Circuits and Systems(ISCAS-2000). Vol.I. 260-263 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 大田一郎: "電荷転送用キャパシタの数が一般的な場合におけるスイッチトキャパシタ変成器の出力抵抗を求める新しい方法について"第13回 回路とシステム(軽井沢)ワークショップ. 467-472 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Ichirou Oota: "A new simple method for deriving output resistances of switched-capacitor power supplies"1999 International Symposium on Nonlinear Theory and its Applications(NOLTA'99). Vol.1. 151-154 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Noriaki Hara: "A programmable ring type switched-capacitor AC-DC converter"1999 International Symposium on Nonlinear Theory and its Applications(NOLTA'99). Vol.1. 159-162 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] N.Hara, I.Oota, F.Ueno, and I.Harada: "Ring type switched-capacitor waveform generators"2000 International Symposium on Nonlinear Theory and its Applications (NOLTA 2000) Dresden, Germany. vol.1. 343-346 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] I.Oota, N.Hara, and F.Ueno: "A general method for deriving output resistances of serial fixed type switched-capacitor power supplies"2000 IEEE International Symposium on Circuits and Systems (ISCAS-2000), Geneva, Switzerland. vol.III. 503-506 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] N.Hara, I.Oota, F.Ueno, and I.Harada: "Ring type switched-capacitor transformer and its applications"2000 IEEE International Symposium on Circuits and Systems (ISCAS-2000), Geneva, Switzerland. vol.I. 260-263 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] I.Oota, N.Hara, and F.Ueno: "A new method for deriving output resistances of switched-capacitor transformers having general number of charge-transformer capacitors"13-th Circuits and Systems Karuizawa Workshop Karuizawa. 467-472 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] I.Oota, N.Hara, and F.Ueno: "A new simple method for deriving output resistances of switched-capacitor power supplies"1999 International Symposium on Nonlinear Theory and its Applications (NOLTA'99), Waikoloa, Island of Hawaii, USA. vol.1. 151-154 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] N.Hara, I.Oota, F.Ueno, and I.Harada: "A programmable ring type switched-capacitor AC-DC converter"1999 International Symposium on Nonlinear Theory and its Applications (NOLTA'99), Waikoloa, Island of Hawaii, USA. vol.1. 159-162 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] N.Hara, I.Oota, F.Ueno, I.Harada, and T.Inoue: "Ring type new switched-capacitor DC-DC converters"Electronics and Communications in Japan, Part 2. vol.82, no.11. 14-27 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] N.Hara: "Ring type switched-capacitor waveform generators"2000 International Symposium on Nonlinear Theory and its Applications (NOLTA 2000). vol.1. 343-346 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] I.Oota: "A general method for deriving output resistances of serial fixed type switched-capacitor power supplies"2000 IEEE International Symposium on Circuits and Systems (ISCAS-2000). vol.III. 503-506 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] N.Hara: "Ring type switched-capacitor transformer and its applications"2000 IEEE International Symposium on Circuits and Systems (ISCAS-2000). vol.I. 260-263 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 大田一郎: "電荷転送用キャパシタの数が一般的な場合におけるスイッチトキャパシタ変成器の出力抵抗を求める新しい方法について"第13回回路とシステム(軽井沢)ワークショップ. 467-472 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] N.Hara: "A programmable ring type switched-capacitor AC-DC converter"1999 International Symposium on Nonlinear Theory and its Applications (NOLTA'99). vol.1. 159-162 (1999)

    • Related Report
      2000 Annual Research Report
  • [Publications] N.Hara: "Programmable ring type switched- capacitor DC-DC converters"Electronics and Communications in Japan. vol.82,no.11. 14-27 (1999)

    • Related Report
      2000 Annual Research Report
  • [Publications] Ichirou Oota: "A new simple method for deriving output resistances of switched-capacitor power supplies"1999 International Symposium on Nonlinear Theory and its Applications (NOLTA'99). Vol. 1. 151-154 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Noriaki Hara: "A programmable ring type switched-capacitor AC-DC converter"1999 International Symposium on Nonlinear Theory and its Applictions (NOLTA'99). Vol. 1. 159-162 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 大田一郎: "スイッチトキャパシタ変成器の出力抵抗を求める簡単な方法について"第52回電気関係学会九州支部連合大会. 361-361 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 原憲昭: "プログラマブルなSC DC-DCコンバータについて"第13回熊本県産学官技術交流会. 13302-13302 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Noriaki Hara: "Ring type new switched-capacitor DC-DC converters"1998 International Symposium on Nonlinear Theory and its Applications (NOLTA'98). Vol. 1. 339-342 (1999)

    • Related Report
      1999 Annual Research Report

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Published: 1999-03-31   Modified: 2016-04-21  

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