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IGBT Forum Discussions

User17675
Level 1
5 questions asked First question asked First reply posted
Level 1
tail current inevitable for IGBTs, but why?
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Giuseppe_De_Fal
Moderator
Moderator 10 solutions authored 10 replies posted 10 sign-ins
Moderator
Hi Wen,
the IGBT is a bipolar device and, due to this bipolar nature, it stores an excess of charges during the conduction phase. This allows the IGBT to show very low resistivity during the on phase.
However, on the other hand, this excess of charge, that must be depleted in the turn-off phase, is responsible of the tail current.

Regards,
Giuseppe

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Giuseppe_De_Fal
Moderator
Moderator 10 solutions authored 10 replies posted 10 sign-ins
Moderator
Hi Wen,
the IGBT is a bipolar device and, due to this bipolar nature, it stores an excess of charges during the conduction phase. This allows the IGBT to show very low resistivity during the on phase.
However, on the other hand, this excess of charge, that must be depleted in the turn-off phase, is responsible of the tail current.

Regards,
Giuseppe
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