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Thread: IRPS5401 won't start / initial bring-up

  1. #1
    New Member New Member GnilCH is on a distinguished road
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    Jul 2019

    IRPS5401 won't start / initial bring-up

    Hey Guys

    I have this strange problem with all IRPS5401 on our new PC Board. Even though the devices are configured properly, they won't start-up the output voltage when commanded to do so. I checked all external voltages and inputs to the devices and they seem fine. I even extracted the configuration of a running IRPS5401 on a Xilinx FPGA Eval Board and copied it over to one of my IRPS5401 and it still refuses to ramp up the output voltage.
    The copied-over channel even has the very same voltage and current configuration as on the Xilinx eval board and the connections of the IRPS5401 are EXACTLY the same as on the Xilinx eval board as well, so I'm really running out of ideas here and the whole board is dead in the water without the enabling of these power converters =(
    Is there some sort of a safety switch that needs to be disabled first before enabling the device for the first time?
    Do I need to program the configuration into the MTP or can the device run with a temporary configuration programmed by the PowIRCenter into volatile memory?

    I do have other IR-devices on the same board, like IR38060/62/64, which all run fine. Only the IRPS5401 refuses to give in to my commands

    Your help is very much appreciated

    Edit: attached schematic page
    Click image for larger version

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    Last edited by GnilCH; Jul 3rd, 2019 at 04:53 AM. Reason: attached schematic page

  2. #2
    New Member New Member Aef is on a distinguished road
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    Sep 2019
    Hi to all,

    same problem here!
    We have a carrier board for an UltraZED with two IRPS5401 and they won't to ramp up output voltages. We set them with the DESIGN WIZARD of IR PowIRCenter (build 6834) without any success.

    Your help is very much appreciated.

  3. #3
    New Member New Member nickb is on a distinguished road
    Join Date
    Sep 2019
    Can you check the status of the output rails in PowIRCenter?
    Maybe there are overcurrent faults disabling the outputs?

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