Search tips
Showing 42 results View by: Thread Post Sort by
    Answered

  • PMP20859: Seamless Failover

    Resolved
    Part Number: PMP20859 Other Parts Discussed in Thread: LM5020 , TPS3808 Hi TI, Is the reference design of PMP20859 able to output Vout with only Aux 48Vdc input and with disconnected PoE input? The reason asking this is because Vout would be 0V initially…
    • Resolved

  • RE: PMP20859: Behavior Questions

    Allan, There is no priority for the PoE inputs with this design. The port with the higher voltage will supply the power. If the voltage on each port is close to being the same, there may be some sharing of power. Thanks, David
    • Answered

  • PMP20859: Disabling TPS2372 PoE controller completely.

    Resolved
    Part Number: PMP20859 Other Parts Discussed in Thread: TPS2372 We have successfully implemented a dual PoE & external 48V input based on the PMP20859 reference circuit, which works fine. External 48V in only, works. PoE swapping over works no glitches…
    • Resolved

  • 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…

Didn't find what you are looking for? Post a new question.