• ADUM4135 Fault pin issue


    I am using ADuM4135 for 3phase inverter circuit to drive IGBT module.

    ADum4135 toggles fault pin low even if voltage at desat pin is not exceeding 9V.



  • ADuM4135

    Hello there,

    is there any PSpice model or similar available for the ADuM4135?

    Best Regards

  • ADuM4135

    I saw this component is pretty new so I have some questions as below:

    1. The full production time June so when and how I can get samples?

    2. Compared to Infineon 1ED020I12-F2, one major benefit of ADuM4135 is it is 3.3V compatible. But do you think…

  • AduM4135 Gate Ringing

    Fig1 AduM4135 Gate Ringing

    Fig 1 AduM4135 Ringing

    Fig2 ISO5451 

    Hi, I'm using the Adum4135 at 20kHz with Rgon=Rgoff=4.7Ohm. I noted a ringing problem in the gate turn on(see fig1) The turn on is ringing at about 30MHz. At the beginning I thought that the problem was in my pcb…

  • Maximum Frequency of ADUM4135

    Hi Everyone,

    ADUM4135 can accept 1MHz input signal? The application is 1MHz Isolated Half Bridge Converter and

    I'm not sure ADUM4135 can cover 1MHz drive signal due to no information in its datasheet.

    Thank you.

  • RE: ADUM4135 false FAULT signals latches device off

    The ISO5852S is a similar part to the ADuM4135, but as mentioned, there is a difference in drive strength. If you want a specific rise/fall time, the ADuM4135 uses a larger external series resistor than the ISO5852S, shifting more power dissipation outside…

  • RE: ADuM4135 Desat blanking switch not working


    We found that the GND2 is not floating. All the desat internal switches of the four ADuM4135 for the H-Bridge were not working. And the signals can be generated normally (the other functions works well) if we disable the desat function.

    But yesterday…

  • ADUM4135 issues

    Still have issues with chip latch up when thermal protection activates.

    Please contact me to discuss.






    Bob Gable

    President / Electrical Engineering Consultant

    Performance Specialties LLC

    8855 S 135th St W

    Clearwater, KS 670…

  • ADum4135 Questions


    I noticed in Fig. 28 of the the datasheet for the adum4135 it doesn't show the fault and ready pins connected to VDD1 through pull-up resistors but does in the user guide for the demo board.  Are those resistors required? 

    Is there an equation…

  • RE: Is ADuM4135 suitable for high voltage SiC application? Do you have some suggestion?



    The ADuM4135 does have good performance, but we have come across cases where short bursts of RF can upset the DESAT operation of the parts causing a premature fault to register. We are working on addressing the issue. We should have an update…