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PMP23340UCD: Why there is no output when TH is set to ((1/(900e3)))

Martin
Prodigy 170 points
Part Number: PMP23340UCD
Other Parts Discussed in Thread: UCD3138A

Hi，

Thank u for ur time.

I have some doubts about PMP23340UCD.

      Hardware：PMP23340UCD(UCD3138A) （48v-12v）
      Firmware：TI supplied routines——UCDIBCFirmware 

  • Modifying TH from (1/(1000e3)) to (1/(1500e3)) can make the output frequency 1MHZ-1.5MHZ; but modifying TH to ((1/(900e3)), the board has no waveform output. There is a hidden danger in this modification, but I'm trying to figure out why there is no output when TH is greater than ((1/(900e3))?

Best Regards.

  • 0
    TI__Genius 14580 points

    Martin,

    I didn't see the reason that the output doesn't come out at 900kHz. If GUI modification works, the code change should work as well.

    This post has been a while, and I wonder if you still see the same case?

    Thanks,
    Sean