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  • RE: PMP20859: could TPS2378 achieve the Dual-Input Redundant PoE PD like that in PMP20859

    Zach, Yes, that is correct. The TPS2372 (and TPS2373) used in PMP20859 has built-in pulsed MPS, which save quite a few external components, plus it is rated for higher power. Thanks, David
    • Answered

  • PMP20859: What are the MOSFETs for in the input bridge rectifiers ?

    Resolved
    Part Number: PMP20859 Other Parts Discussed in Thread: CSD19538Q3A What is the purpose of the MOSFET's in the POE input bridge rectifiers (eg Q1, Q2, Q3, Q4 - CSD19538Q3A) of the PMP20859 ?
    • Resolved
    • Answered

  • PMP20859: If I don't require external 48V input, do I just delete the ringed components below ?

    Resolved
    Part Number: PMP20859 I require a dual PoE input design, but no external 48V input, so do I just delete the components ringed below. Looks like I won't need the 48V input connector, 48V sense control and 2 off circuits to pull (PoE) PG low if external…
    • Resolved

  • PMP20859: PMP20885, PMP20940 support need

    TI Thinks Resolved
    Part Number: PMP20859 Hi team, I found that we have PMP20885, PMP20940 those two reference designs, could you please s h are the PMP20885, PMP20940 design documents to customer for reference? Looking forward to your reply.

  • PMP20859: Questions

    TI Thinks Resolved
    Part Number: PMP20859 Other Parts Discussed in Thread: TPS2372 Hi, I would like to ask why R35 is configured to 27.4k ohms? This contradicts the TPS2372 datasheet which recommends 24.9k ohms. Thank you, Sith

  • PMP20859: Questions

    TI Thinks Resolved
    Part Number: PMP20859 Other Parts Discussed in Thread: TPS3808 , TPS2372 , TPS2373 Hi Experts, I have a few questions regarding this design: Why is there a need for the UVLO of the converter to be pulled low by Q9? I thought that unless the inrush phase…

  • TPS2373: PMP20859 .bt change to .at

    TI Thinks Resolved
    Part Number: TPS2373 Other Parts Discussed in Thread: TPS2378 , TPS2372 , PMP20859 Dear Team, Below redundant PD is for .bt, if I want to implement .at version just change the TPS2372 to TPS2378, right? Or you have better total solution or reference design…
    • Answered

  • PMP20859: Questions about PMP20859

    Resolved
    Part Number: PMP20859 Hi experts, As we know PMP20859 can support up to 3 inputs, two are PSE, one is DC Jack. Now customer is going to use PMP20859 as base to modify for their customer. 1. They would like to remove DC Jack, what components can be…
    • Resolved
    • Answered

  • PMP20859: How to choose R58 size and calculate method?

    Resolved
    Part Number: PMP20859 For PMP20859, I see the R58 package for 35.7kohm is 0603 on PMP20859, but it's only 1/16W. Is it ok? Please help to check how to calculate it?
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    • Answered

  • PMP20859: Dual-Input Redundant PoE PD With Smooth Transition

    Resolved
    Part Number: PMP20859 Other Parts Discussed in Thread: TPS2373 , Hello Sirs, Just need to double check this PMP20859 .(two tps2373 + single isolation flyback ) Is it no problem for two PSE input redundant power input , and system still working without power…
    • Resolved

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