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Reg: UCD90120A OC Fault flag set during power on condition

Other Parts Discussed in Thread: UCD90120A

Hi,

We have been using Zynq ZC706 evaluation board from 6 months but all of a sudden the board is not working.

When we gone through the solution on "Zynq-7000 AP SoC ZC706 Evaluation Kit - Board Debug Checklist" .

We have followed the steps given there. The LEDs are not glowing on the board, after reprogramming using TI's

      "Fusion Digital Power Manufacturing tool software package" we are getting below error .

     List of LEDs are not glowing on-board

     1. DS2

     2. DS11

     3. DS13

     4. DS15

     5. DS16

     6. DS20

     7. DS23

     8. DS24

     9. DS26

     10. DS27

  Only DS22 was glowing and following error message is received after propraming the UCD90120A device.

    ERROR: "READ_OUT on rail#1(0.001V) was not within 5% of VOUT_COMMAND(1.000V)

 We followed the steps as you mentioned in the AR 39037 from points 9 to 12.

 From "Fusion Digital Power Designer Tool",  following observations are made.

1) In status window, for rail#1, IOT OC fault flag was set

2)  From Peak readings tab, rail#1 has max. voltage 1.003V and max. current 11.75A

3) After clearing the faults, the voltage and current for all rails was ~0

4) After reset the module, the same error flag with same max voltage and max current was occurred.

Here with I attached the screen shot of fault window for your reference.

 So please give suggestion to go further to debug the problem.

 

Thanks and regards

P.Mohankumar