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ADUM4135 Sat function

Hi Sir

I use the Adum4135 for IGBT in inverter application & found the P10 is too sensitive for IGBT Protect

how to adjust the R&C value as the red circle

Can I shut down the Pin 10 function which keep the IC work correct ?


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  • i haver a similar question, is seems that the desat threshold is switched voltage dependent in my application  

    The resistors are used to increase the detected voltage.  The current limit changes from about 7A at 400V to 17A at 100V.  The switching edge is about 10nS 400V.    Do I need to change the diode or resistors?  I have seen various values in evals boards but not found any description of how to dimension this.

  • Hallo Nignogs,

    I am not sure if you had a reply via Email etc before. If not, sorry for delay.

    DESAT Threshold is fixed inside the gate driver.
    The external components and/or factors (e.g. temperature of diode, MOSFET/IGBT) can affect the voltages in your system, and changing node voltage on Pin10. Thus the threshold voltage is reached differently.