The Turn-off Behavior of Superjunction MOSFETs Influenced by the Junction Capacitance in the Freewheel Diodes

The Turn-off Behavior of Superjunction MOSFETs Influenced by the Junction Capacitance in the Freewheel Diodes

Citation Author(s):
Daisuke
Arai
Submitted by:
Daisuke Arai
Last updated:
Sun, 08/25/2019 - 20:25
DOI:
10.21227/f5bc-5q42
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Abstract: 

We investigated the turn-off waveforms of Superjunction (SJ) silicon MOSFETs with respect to their own charge imbalance by experiments as well as by device simulations.When SJ-MOSFETs are used for chopper circuits we find a unique hump in the current waveform during the turn-off transient. The magnitude of the hump shape waveform drastically depends on the charge imbalance (CIB) in the SJ structure.

For N-type rich CIB we find larger current hump while the hump is reduced or disappear for P-type rich CIB. Furthermore the junction capacitance in the freewheel diode (FWD) influences on the magnitude of the current hump. Larger junction capacitance enhances the magnitude of the current hump.

These experiments and simulations indicate that the internal physics in the semiconductor directly affects the switching waveforms.

In this article we also propose the novel SJ device structure to stabilize the variation of switching waveforms and turn-off loss (Eoff).

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[1] Daisuke Arai, "The Turn-off Behavior of Superjunction MOSFETs Influenced by the Junction Capacitance in the Freewheel Diodes", IEEE Dataport, 2019. [Online]. Available: http://dx.doi.org/10.21227/f5bc-5q42. Accessed: Sep. 18, 2019.
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doi = {10.21227/f5bc-5q42},
url = {http://dx.doi.org/10.21227/f5bc-5q42},
author = {Daisuke Arai },
publisher = {IEEE Dataport},
title = {The Turn-off Behavior of Superjunction MOSFETs Influenced by the Junction Capacitance in the Freewheel Diodes},
year = {2019} }
TY - DATA
T1 - The Turn-off Behavior of Superjunction MOSFETs Influenced by the Junction Capacitance in the Freewheel Diodes
AU - Daisuke Arai
PY - 2019
PB - IEEE Dataport
UR - 10.21227/f5bc-5q42
ER -
Daisuke Arai. (2019). The Turn-off Behavior of Superjunction MOSFETs Influenced by the Junction Capacitance in the Freewheel Diodes. IEEE Dataport. http://dx.doi.org/10.21227/f5bc-5q42
Daisuke Arai, 2019. The Turn-off Behavior of Superjunction MOSFETs Influenced by the Junction Capacitance in the Freewheel Diodes. Available at: http://dx.doi.org/10.21227/f5bc-5q42.
Daisuke Arai. (2019). "The Turn-off Behavior of Superjunction MOSFETs Influenced by the Junction Capacitance in the Freewheel Diodes." Web.
1. Daisuke Arai. The Turn-off Behavior of Superjunction MOSFETs Influenced by the Junction Capacitance in the Freewheel Diodes [Internet]. IEEE Dataport; 2019. Available from : http://dx.doi.org/10.21227/f5bc-5q42
Daisuke Arai. "The Turn-off Behavior of Superjunction MOSFETs Influenced by the Junction Capacitance in the Freewheel Diodes." doi: 10.21227/f5bc-5q42