• Issue with dual ADM1278 connection.

    Hi Experts,

    I have a issue with the design dual ADM1278 hot swap controller connection as picture below:

    The issue is in the case when PSU1 is delivering power to 12V_main and PSU2 doesn't provide power to 12V_main but at the PSU2 side, we measured…

  • How to disable FET Health function in ADM1278

    Hi Experts,

    I have a issue with FET Health function in HSC ADM1278. And I know that this function can disable via PMBUS by write a comment in DEVICE_CONFIG[11] register. But after disable the function, I saw that it doesn't affect because the FAULT pin…

  • How to setting or calculation the ADM1278 output current ramping up rate?

    Dear ADI Expert,

    How to setting or calculation the ADM1278 output current ramping up rate? My customer uses the following circuit. The end customer has a requirement. "Current ramping up rate at starting up transient of 12V rail should be limited within…

  • ADM1278 Hot Swap Designer by Spreadsheet tool

    Dear Supporter,

    I used ADM1278_HotSwapDesigner.xlsm to design eFUSE for load condition below:

    - Imax = 187.67A

    - OCP = 234.6A

    - MOSFET: NTMFS0D9N03CGT1G

    - Rsense: 0.5mOhm/3W

    OCP condition only happen during the short time (200us). How to input above…

  • ADM1278 IBIS Model

    Dear ADI Expert,

    Does the ADM1278 have the IBIS simulation model?

    Thanks & best regards.

    Andy Yang.

  • Current reading thru PMBus of ADM1278

    Hi,

    We are using ADM1278 hot-swap controller in our server board design. While testing the board we tried reading the current thru PMBus interface, but the value does not seem correct. (It is showing 25A which is supposed to be around ~50A for the applied…

  • Does the ADM1278 FAULT event still on monitor when the EN=Low?

    Dear ADI Expert,

    Does the ADM1278 FAULT event still on monitor when the EN=Low?

    I assign the ADM1278 GPO2 to the VIN_UV_FAULT_EN2 after power-up.

    Then GPO2=High.

    After this status turns EN=Low.

    GPO2 still High.

    Adjust Vin to under UV setting value.

    Then…

  • ADM1278

    We are using ADM1278 in our Server design for Power monitoring. We have designed the circuit referring to the reference design from EVAL-ADM1278EBZ User Guide
    UG-601. The values for discrete components have been selected as per our current and voltage…

  • ADM1278 Vin(0x88) read issue

    Hi 

    we have read input voltage by 0x88. but now we found that the raw date was wrong., please refer as below:

    0x88: 0x12FD = 0001 0010 1111 1101 = from datasheet description, bit12~bit15 should reads as 0000. 

    is there has any condition will caused the…

  • ADM1278 OCP setting

    Dear ADI Expert,

    If I set ADM1278 to OCP=95A, but I need to output 140A for 22us to DC-DC start-up current. How can I do it? The MOSFET is used PH0925CL x4.

    Thanks and best regards.

    Andy Yang.