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Using an IRS2513 half bridge driver tuned at 30 kHz with 1MBH60-100 1000 V, 60 A IGBTs, the driver is giving the high-side gate the full 24 V input voltage.

I have included a picture of how I configured the driver and how the oscilloscope looked when measuring (measured from HO to GND and LO to GND).

Why is this happening? The driver has an internal 15.4 V zener clamp.

IRS2513

scope

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    \$\begingroup\$ Do you measure the high-side gate drive output with respect to the ground or with respect to the high-side switch's source pin? Also, is there any load? \$\endgroup\$
    – Rohat Kılıç
    Commented Jan 22 at 20:28
  • \$\begingroup\$ So are you asking about how a high-side bootstrap circuit works? electronics.stackexchange.com/questions/624470/… \$\endgroup\$
    – G36
    Commented Jan 22 at 20:32
  • \$\begingroup\$ @RohatKılıç I can't believe I missed that... Switching the HO probe's ground to VS, I am now measuring the correct voltage. Thank you! \$\endgroup\$
    – ElectronicsNoob
    Commented Jan 22 at 20:47

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Turns out my scope probes were placed incorrectly. I was measuring from HO to Gnd and should have been measuring from HO to VS.

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  • \$\begingroup\$ Make sure you didn't probe anything else whilst the gnd clip was connected to the VS. \$\endgroup\$
    – Rohat Kılıç
    Commented Jan 22 at 20:50
  • \$\begingroup\$ Also don't forget to accept your own answer (as, apparently, your problem is solved) so that the question doesn't remain open. \$\endgroup\$
    – Rohat Kılıç
    Commented Jan 22 at 20:51
  • \$\begingroup\$ Sure thing! However I cannot accept my own answer until two days have passed. \$\endgroup\$
    – ElectronicsNoob
    Commented Jan 22 at 20:56

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