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  • RE: Highest efficiency possible with non-custom transformers for POE isolated power converter.

    Resolved
    Hi Karlis, Thank you for your question. 1. For highest efficiency and a non-custom transformer and combined PoE PD + flyback converter, I recommend the TPS23757EVM. This design is able to achieve the below efficiency: The Nsupply efficiency line shown…
    • Answered

  • 802.3bt - Current Inbalance between pairs.

    Resolved
    Other Parts Discussed in Thread: TPS23880 , TPS2388 , TPS2372-3EVM-757 Hi, If we are designing a 802.3bt system, where we are pushing 90W ( from the PSE ), this implies about 900mA per pair. If one of the pairs breaks, the current will flow across just…
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    • Answered

  • TPS2378: TPS2378 getting hot

    Resolved
    Part Number: TPS2378 Other Parts Discussed in Thread: TPS2372-3EVM-757 , TPS23861 , , TPS23861EVM-612 , TPS2372 Hi, I have a PoE circuit for LED Lighting that uses the TPS2378 as the PD interface. The 48V is then taken to a LED constant current circuit to…
    • Resolved

  • RE: TPS2372: Inrush issue

    Hi Howard, The TPS2372-4EVM-006 was designed to pair with a DCDC converter to evaluate the converter's performance with the TPS2372's inrush delay feature. The TPS2372 has an inrush current between 275mA and 395mA. Adding a load to the EVM will…

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