Tip / Sign in to post questions, reply, level up, and achieve exciting badges. Know more

IGBT Forum Discussions

User17687
Level 1
5 questions asked First question asked First reply posted
Level 1
Hi,

could you please explain the advantage of Kelvin emitter of IGBTs?

Thank you in advance!
0 Likes
1 Solution
IGBT_JC
Moderator
Moderator 5 solutions authored 5 replies posted 5 sign-ins
Moderator
Hello,

The Kelvin emitter pin connection eliminates the effect of parasitic inductance shared by the gate driver circuit and the main power circuit.

The negative impact of this common-emitter inductance is significantly increased at high switching frequency operation where mainly high di/dt’s are present, increasing the switching losses and generating risky gate voltage spikes that could cause spurious turn-on, and/or destroy the IGBT.

Details of the importance of the Kelvin emitter pin are discussed at length in this application note:
https://www.infineon.com/dgdl/Infineon-Application+Note+TRENCHSTOP%E2%84%A2+5+in+TO-247+4pin-AN-v01_...


Thank you

View solution in original post

0 Likes
1 Reply
IGBT_JC
Moderator
Moderator 5 solutions authored 5 replies posted 5 sign-ins
Moderator
Hello,

The Kelvin emitter pin connection eliminates the effect of parasitic inductance shared by the gate driver circuit and the main power circuit.

The negative impact of this common-emitter inductance is significantly increased at high switching frequency operation where mainly high di/dt’s are present, increasing the switching losses and generating risky gate voltage spikes that could cause spurious turn-on, and/or destroy the IGBT.

Details of the importance of the Kelvin emitter pin are discussed at length in this application note:
https://www.infineon.com/dgdl/Infineon-Application+Note+TRENCHSTOP%E2%84%A2+5+in+TO-247+4pin-AN-v01_...


Thank you
0 Likes