2.2 kV SiC BJTs with Low VCESAT Fast Switching and Short-Circuit Capability

Abstract:

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This paper reports large active area (15 mm2) 4H-SiC BJTs with a low VCESAT=0.6 V at IC=20 A (JC=133 A/cm2) and an open-base breakdown voltage BVCEO=2.3 kV at T=25 °C. The corresponding room temperature specific on-resistance RSP-ON=4.5 mΩcm2 is to the authors knowledge the lowest reported value for a large area SiC BJT blocking more than 2 kV. The on-state and blocking characteristics were analyzed by device simulation and found to be in good agreement with measurements. Fast switching with VCE rise- and fall-times in the range of 20-30 ns was demonstrated for a 6 A 1200 V rated SiC BJT. It was concluded that high dynamic base currents are essential for fast switching to charge the BJT parasitic base-collector capacitance. In addition, 10 μs short-circuit capability with VCE=800 V was shown for the 1200 V BJT.

Info:

Periodical:

Materials Science Forum (Volumes 645-648)

Edited by:

Anton J. Bauer, Peter Friedrichs, Michael Krieger, Gerhard Pensl, Roland Rupp and Thomas Seyller

Pages:

1033-1036

DOI:

10.4028/www.scientific.net/MSF.645-648.1033

Citation:

M. Domeij et al., "2.2 kV SiC BJTs with Low VCESAT Fast Switching and Short-Circuit Capability", Materials Science Forum, Vols. 645-648, pp. 1033-1036, 2010

Online since:

April 2010

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$35.00

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