High‐speed switching of the power transistor in a DC‐DC converter with current feedback and core saturation

Koosuke Harada, Hiroshi Sakamoto, Masahito Shoyama

研究成果: Contribution to journalArticle査読

抄録

To reduce the size and weight of a switching dc‐dc converter, it is effective to increase its switching frequency. This requires the reduction of the switching time and switching loss. This paper introduces a dc‐dc converter with a short turn‐off time and a high efficiency at a switching frequency up to the order of megahertz. This is achieved by using a bipolar transistor with current feedback and core saturation. The turn‐off mechanism was analyzed by using an equivalent circuit. The turn‐off time was found to be considerably shortened by the quick discharge of the excess carrier in the base region. This is due to the formation of an LC circuit consisting of the saturated inductance of the current feedback transformer which magnetically saturates during the turn‐off period, and the base‐emitter capacitance of the switching transistor. This phenomenon can be used widely for high‐speed and high current switchings.

本文言語英語
ページ(範囲)60-68
ページ数9
ジャーナルElectronics and Communications in Japan (Part II: Electronics)
69
7
DOI
出版ステータス出版済み - 1 1 1986

All Science Journal Classification (ASJC) codes

  • 物理学および天文学(全般)
  • コンピュータ ネットワークおよび通信
  • 電子工学および電気工学

フィンガープリント

「High‐speed switching of the power transistor in a DC‐DC converter with current feedback and core saturation」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル