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Trench depth optimization for energy efficient discrete power trench MOSFETs
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Alatise, Olayiwola M., Parker-Allotey, Nii-Adotei, Jennings, M. R., Mawby, P. A. (Philip A.), Kennedy, Ian and Petkos, George (2011) Trench depth optimization for energy efficient discrete power trench MOSFETs. In: The 41st European Solid State Device Research Conference (ESSDERC), Finlandia Hall, Helsinki, Finland, Sep 12-16, 2011. Published in: Solid-State Device Research Conference (ESSDERC), 2011 Proceedings of the European pp. 291-294. ISSN 1930-8876. doi:10.1109/ESSDERC.2011.6044177
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Official URL: http://dx.doi.org/10.1109/ESSDERC.2011.6044177
Abstract
Power losses are investigated in trench MOSFETs as functions of trench depth and switching frequency. MOSFETs with different trench depths are fabricated and characterized. Measurements show that gate charge and capacitance increases with trench depth thereby increasing switching losses. However, conduction losses reduce with increasing trench depth because of higher gate-modulated accumulation charge at the drain. Since switching losses increase with frequency, the trade-off between the conduction and switching losses for different trench depths will be determined by the switching frequency. In conclusion, deep-trench MOSFETs outperform shallow-trench MOSFETs at low frequencies and become outperformed by the latter at high frequencies.
| Item Type: | Conference Item (Paper) | ||||
|---|---|---|---|---|---|
| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering | ||||
| Divisions: | Faculty of Science > Engineering | ||||
| Journal or Publication Title: | Solid-State Device Research Conference (ESSDERC), 2011 Proceedings of the European | ||||
| Publisher: | IEEE | ||||
| ISSN: | 1930-8876 | ||||
| Book Title: | 2011 Proceedings of the European Solid-State Device Research Conference (ESSDERC) | ||||
| Official Date: | 2011 | ||||
| Dates: |
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| Page Range: | pp. 291-294 | ||||
| DOI: | 10.1109/ESSDERC.2011.6044177 | ||||
| Status: | Not Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access | ||||
| Funder: | Advantage West Midlands (AWM) | ||||
| Conference Paper Type: | Paper | ||||
| Title of Event: | The 41st European Solid State Device Research Conference (ESSDERC) | ||||
| Type of Event: | Conference | ||||
| Location of Event: | Finlandia Hall, Helsinki, Finland | ||||
| Date(s) of Event: | Sep 12-16, 2011 |
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