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  • PMP11257: The PMP11257 evaluation board circuit does not require input auxiliary power μA

    TI Thinks Resolved
    Part Number: PMP11257 Other Parts Discussed in Thread: TPS2378 , Tool/software: PMP11257 Evaluation board circuit, if the input auxiliary power supply is not required, can the TPS2378 peripheral and auxiliary input circuits be removed?

  • PMP11257: The IC which can replace the PMP11257

    TI Thinks Resolved
    Part Number: PMP11257 Hello, I would like to find a proper IC which replace under the full bridge rectifier in PMP11257, for saving the space on PCB. Critical condition : Replaced IC should be applied to PoE architecture. (PAIR12, PAIR34 pin should…
    • Answered

  • RE: PMP11257: DEN Resistor value of TPS 2378

    Resolved
    Nuri, 1. D9 in PMP11257 provides reverse polarity protection on the adapter input. It also blocks the PoE voltage from the adapter. Although not shown on PMP11257, a 58V TVS device (same as D11) should be used after the filtering on the anode of D9…

  • TPS2378: TPS2378 PD Controller Design review

    Part Number: TPS2378 Other Parts Discussed in Thread: PMP11257 , Tool/software: Hello TI Forum Team, I have created a schematic of TPS2378PD controller. I have also implemented the soft start logic for PD controller and 48V to 24V regulator shutdown…

  • TPS2378: T2P; open collector to ground issues

    TI Thinks Resolved
    Part Number: TPS2378 Other Parts Discussed in Thread: PMP11257 Tool/software: We have a design with a TPS2378 for the PoE negotiation. Works well; and is known to work with a large range of ethernet switches. And the APD works; i.e. a supply from…

  • TPS2378: TPS2378 stuck at inrush current limiting mode?

    TI Thinks Resolved
    Part Number: TPS2378 Other Parts Discussed in Thread: PMP11257 Tool/software: Hi, I am trying to achieve 48V on Vdd with reference to RTN. I have added a bulk capacitance of 47uF from Vdd to RTN. The Vdd voltage kept on resetting from 46V down to 0V…

  • TPS2373: Part suggestion for non-isolated DC-DC converter

    TI Thinks Resolved
    Part Number: TPS2373 Other Parts Discussed in Thread: TPS2378 , PMP11257 , LM70840 , TPS23861 , , , LM51561 Tool/software: Hi team, We are planning to use the TPS2373 in our design with a non-isolated DC-DC converter to provide 5V/3A . The system is…

  • TPS2378: TI DC DC Converter to use with TPS2378 for POE Bt

    TI Thinks Resolved
    Part Number: TPS2378 Other Parts Discussed in Thread: LM76002 , LM76003 , PMP11257 , LM5116 Tool/software: Hello, Originally, in a POE Bt design, we were using a TPS2378 with a Vishay SIC469 DC DC converter. However we are no longer using the Vishay…

  • RE: TPS23758: TPS2375x Part selection assistance

    Hi Neil, For low-side switching Buck converter I think TPS23755 and TPS23758 have no difference. PMP11257 ( www.ti.com/.../PMP11257) uses TPS2378 + LM5116 which is a synchronous Buck converter in PoE design. But it is discrete solution. Best regards…
    • Answered

  • RE: TPS23731: PoE Class 4 without isolation transformer

    Resolved
    Hi Jim, Thanks for reaching out! Standard PoE will require isolation as below pictures. It may not be fully isolated if you have a local load or MCU and using non-isolated DC/DC. If you still consider non-isolated solution, it may be easier to use…

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