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Measuring gate threshold voltage

Farzad
Farzad Contributor Level 1
edited May 2023 in General

Hi all,

I am preparing to set up the gate threshold voltage measurement circuit for the Wolfspeed HF module (CAS120M12BM2). However, I encountered an issue when increasing the gate voltage to reach the threshold voltage level. Once I reached the gate threshold voltage and I stopped increasing, the drain-source current began to decrease gradually (around 1 MicroAmp per 10 seconds). This only happened when using the MOSFET, not the IGBT. I was wondering if anyone could tell me the reason.

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Comments

  • Forum_Moderator
    Forum_Moderator Wolfspeed Employee - Contributor Level 4

    Thank you for your post, it has been approved and we will respond as soon as possible.

  • JHayes
    JHayes Wolfspeed Employee - Contributor Level 3

    Hi Farzad,

    Can you provide schematics or pictures of your test setup? It would be beneficial to see how the module is connected, the test procedure, and how you are making the current measurement.

    Thanks,

    Jonathan

  • TBhatia
    TBhatia Wolfspeed Admin - Contributor Level 5

    Hi, I hope that this answered your question. If it did, please click on "This question has been answered - Close Discussion" . If you have a follow up question, at a later date, please "Start a New Discussion" 

This discussion has been closed.