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CRD25DA12N-FMC power loop inductance

jiten000
jiten000 Contributor Level 1
edited August 2023 in Module Products

Hi, there are only 3 x 65 uF capacitors are present and no high frequency capacitors are used in the DC-Link of this design. DC+ and DC- is interleaved across 4 layers. Can you share the power loop inductance of this design?

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.

  • ChrisN
    ChrisN Wolfspeed Employee - Contributor Level 2

    Hello jiten000,

    Thank you for your question. The power loop inductance was measured to be 8.6 nH at 10 MHz. The measurement results are provided below. 

    Inductance - 25kW Reference Design.PNG


    Thanks,

    Chris N.

  • jiten000
    jiten000 Contributor Level 1

    Hi Chris,

    Thanks for your reply. What is the overshoot observed on Drain?

    Regards,

    Jitendra

  • ChrisN
    ChrisN Wolfspeed Employee - Contributor Level 2

    Hello Jitendra,

    Thank you for your follow-up question. Below is a oscilloscope screenshot from one of our experimental tests. The maximum observed VDS in our testing was 1.03 kV (230 V of overshoot on 800 V bus), which is well within the safe operating region of the power module. The operating conditions for this experiment are summarized in the table below. If necessary, this overshoot can be reduced by increasing the gate resistances. 

    image.png
    image.png

    Thanks,

    Chris N.

  • jiten000
    jiten000 Contributor Level 1

    Thanks

This discussion has been closed.