This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

  • TI Thinks Resolved

ISOW7841: ISOW7841 Viso output is pulled down to 1V

Part Number: ISOW7841

1.I test ADUM6400 is ok use above circult.It can appear Viso pulled down to 1V when I test ISOW7841 use the same circult,the measured current is 80mA cann’t exceed 130mA,but it is OK when unconnect load,pls help provide some suggestions,thanks

2.VBUS input is 5V/1A,Viso is 3.3V

  • Hi,

    ISOW7841 should be capable of giving 3.3V output upto 130mA load current when an input of 5V is applied.
    Could you please clarify a few points?
    1) Where was the output voltage measurement done? Was it done directly on the VISO pin of the device? (Pin 16)
    2) Is the 40 ohm shown in schematic the load? Is the VCC_FPGA_3V3 shorted to AGND to achieve 80mA load condition?

    Regards,
    Anand Reghunathan
  • In reply to Anand Reghunathan:

    Hi Anand reghunathan

    1.Output voltage is directly on the VISO pin of the device
    2.40ohm is magnetic beads not load, 80mA is FPGA(load) directly connected to the 3.3V power supply measured current
  • In reply to user4206199:

    Hi,

    Would it be possible to share your email ID with me? It would be more productive to discuss this over email.
    Thanks.

    Regards,
    Anand Reghunathan
  • In reply to Anand Reghunathan:

    Anand reghunathan

    Thanks for your support,my email is hongyu.zou@dpvr.cn
  • In reply to user4206199:

    This query is being handled over email.

    Regards,
    Anand Reghunathan
  • In reply to Anand Reghunathan:

    We are not reslove this problem until now,thanks
  • In reply to user4206199:

    Hi User4206199,

    This issue looks like it was resolved.
    Could you please confirm whether this issue has been resolved at your end?

    Regards,
    Anand Reghunathan

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.