Kelvin emitter

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

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

Thank you in advance!
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IGBT_JC
Moderator
Moderator
Moderator
10 sign-ins First question asked 5 solutions authored
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

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IGBT_JC
Moderator
Moderator
Moderator
10 sign-ins First question asked 5 solutions authored
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
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