• LT4294 Power delivery issue


    Few months ago I had a session here related to the LT4294IMS#PBF PD issue, that was found to be related to the hot swap N-FET SOA characteristics, that were not good enough.

    I have replaced the transistor(to CSD19537Q3) with better characteristics…

  • LT4294 Does not switch to Auxiliary input with TP-Link PSE.

    Hi Engineer Zone Team

    We are currently evaluating the LT4294 PD interface controller.
    Please refer the attached schematic sheet titled “LT4294_PoE_Aux.pdf”.
    Note only the essential circuitry is shown for clarity.

    The intended maximum power required…

  • LT4294

         Hello! Please explain to me how the resistance in the upper arm is 174k, in the lower arm 52.3 K on the example of the DC2583A debugging Board circuit.

  • lt4294 behavior with passive POE adaptor


    What behavior to expect when connecting lt4294 with the passive POE adaptor(48V)? I'm assuming passive POE is the only power supply, so there will be no negotiation between the POE adaptor and the LT4294. Will the voltage pass through the N-CH FET…

  • LT4294 application issue

    Hi ADIexpert

    I have two questions for the LT4294 application

    1. May I know how long does it usually take for the handshaking from detection to power up between a PSE and PD?

    If I connect a adaptor (use the Aux pin function) and a PSE to a LT4294 PD device…

  • LT4294/95 & LTC4291-1/92 Demo Board Pre-test Report

    Dear All:

    I need the following demo board for IEEE 802.3bt protocols and electrical characteristics pre test report. Can you give us a reference??

    LT4295 Demo Board: P/N: DC2584A-A :https://www.analog.com/en/design-center/evaluation-hardware-and-software…

  • RE: LTSpice model for LT4293

    Hi teja123,

    The model for LT4294 can be used. The only difference between the LT4293 and LT4294 is the /T2P pin signaling when connected to an LTPoE++ PSE.

  • Questions regarding the PoE PD controllers in general.

    Hi Engineer Zone Team

    I have a few questions regarding the PoE PD controllers in general although my application intends to use the LT4294.

    Question 1. – Where does the PD controller receive power during the detection process.

    In the PD controllers…

  • RE: Can the LT4295, LT4293, LT4275A and LT4276A handle dual-signature in PD applications?


    IEEE 802.3bt defines two PD topologies: single-signature and dual-signature. Single-signature PDs present a valid detection signature on both pairsets, while dual-signature PDs present separate detection signatures on each of the two pairsets.…

  • RE: LTC4291-1 & LTC4292 Issue

    The DC2685 is the demo board for the LTC4291-1/LTC4292 and is a PSE.

    The LT4321 is an ideal diode controller, not a PD controller.

    I recommend the DC2583A, LT4294 IEEE 802.3bt PD interface demo board for evaluating the PSE.