High Switching Controllability Trench Gate Design in Si-IGBTs

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

1 Citation (Scopus)

Abstract

A new trench gate design in Si-IGBTs is proposed and analyzed for high controllability of turn-off dV/dt and turn-on dI/dt with low loss operation. Power electronics systems require not only low power loss but also low EMI noise for high cost performance by system downsizing. Although turn-off loss $E _{off}$ and on-state voltage drop $V _ce(sat)$trade-off of IGBT can be improved by enhancement of Injection Enhancement (IE) effect, $E _off$ is limited by dynamic avalanche at low external gate resistance $R_{g}$ condition. In addition, EMI noise is induced by negative gate capacitance at the turn-on switching due to high dI/dt and large surge current $I_{surge}$. Therefore, the system designers require good switching controllability by $R_{g}$ to adjust the power loss and EMI noise trade-off for the optimum system design. This paper shows the dynamic avalanche and negative gate capacitance can be suppressed by management of electric field concentration and hole current flow around the trench gate by proposed Alternated Trench (AT) structure and both good switching controllability and low power loss can be obtained.

Original languageEnglish
Title of host publicationProceedings of the 2020 32nd International Symposium on Power Semiconductor Devices and ICs, ISPSD 2020
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages447-450
Number of pages4
ISBN (Electronic)9781728148366
DOIs
Publication statusPublished - Sep 2020
Event32nd International Symposium on Power Semiconductor Devices and ICs, ISPSD 2020 - Virtual, Online, Austria
Duration: Sep 13 2020Sep 18 2020

Publication series

NameProceedings of the International Symposium on Power Semiconductor Devices and ICs
Volume2020-September
ISSN (Print)1063-6854

Conference

Conference32nd International Symposium on Power Semiconductor Devices and ICs, ISPSD 2020
CountryAustria
CityVirtual, Online
Period9/13/209/18/20

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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