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PMP6776

Vani GK
Prodigy 10 points
Other Parts Discussed in Thread: PMP6776, PMP7804

Hi,

We are using PMP6776 reference design for the power supply of Kintex 7 based development board.What are the signals 1VRM,2V5RM,1V2RM....meant for?

Thanks and Regards,

Vani G

CDAC Trivandrum

  • 0
    TI__Guru**** 191445 points

    Those are test points for measuring loop response.  There is 100 ohm between those points and the respective output voltage in the feedback path.

  • 0 in reply to JohnTucker
    Prodigy 130 points

    Hi,
    I have several points to discuss about the power supply : PMP6776.
    Actually I use this power supply to provide the necessary voltage rails to the Kintex 7 FPGA.
    When the power supply works in stand alone operation, I mean without any FPGA, all the rails are compliant to the texas specifications.
    But when I plug the FPGA, so a load, the rails 1V2, 1V5 et 2V are really noisy and their voltage ripples are out of specification.
    What do you recommend to overcome this issue ?
    Can I add extra capacitors on the board to reduce the voltage ripple ? and if so, what kind of technology shoul I mount ?
    Still, the 1V0's ripple is also high but within 10%.

    Secondly what are the differences between the PMP6776 and the PMP7804 ?

    Berst regards.

    Paulo.