• LT4276 Reference Design


    I am looking at the "Typical Application" design on page 21 of the LT4276 data sheet (4276fa). In this design there is a pi filter in which a smaller inductor (L2) is paralleled with the main inductor (L3). Does anybody know the reason for using two…

  • LT4276 single sided board design

    Hello community!

    I am currently designing a POE+ board using the LT4276. I studied the reference designs (e.g. the DC2046A), which is populated on both sides.

    I would like to design my board populated single sided only. Do you have any design recommendations…

  • LTC4279 Ultra Power Mode, LT4276

    To whom may it concern

    Hi, I'm HS.

    LTC4279 datasheet specifies ultra power mode regarding 'custom pd'.

    I wonder what 'custom pd' specifically mean with respect to LT4279.

    It'd be lovely if you enlighten me how to design the custom…

  • is there safety capacitor required in LT4276 application?

    I am currently designing 90W LTPoE++ Power Supply in Forward Mode with 16V, 5A and am uncertain about one capacitor.

    When we look at reference design 90W LTPoE++ Power Supply in Forward Mode with 12V, 7A of LT4276, presented by Linear, there is a capacitor…

  • RE: DC2046-A LTSpice simulation trouble reading schematic?

    The demo board design files in ZIP is not simulation file. It is package for the PCB board layout in PADS. If you need schematic, you may use the PDF file in the package.

    Simulation file for LT4276A is here: www.analog.com/.../lt4276.html

  • RE: Designing a forward converter with LT4295

    LT4295 and LT4276 are pin-to-pin compatible and share a similar architecture for the switching converter. Check out DC2046A-D, 24V / 0.95A demo board as starting point for your design. You can swap in a LT4295 and you're good to go.

    The LT4295/LT4276…

  • PD Design Query for UltraPWR Mode of LTC4279


    My customer wants to implement PoE system up to 123W using the LTC4279's UltraPWR mode.

    However, ADI's PD devices only support up to 90W(LT4275, LT4276, LT4293...).

    Could you please provide reference material for a PD design that supports 123W…

  • RE: Is there an LTSpice model for LT4295?


    There currently is not a released LT4295 LTSpice model. I've listed several options below.

    Are you trying to simulate the IEEE 802.3bt PD interface? If so, there's a LTSpice model for LT4294 which models the interface.

    Are you trying…

  • LT4295, 20V output, 30W

    I am currently using the LT4295 in on a custom board that is based on DC2046A-C (12V, 1.9A). I now want to design for a board with 20V, 1.5A (about 30W) output. 

    As far as I understood LT4276 is pin-to-pin compatible with LT4295, so I can use DC2046A-D…

  • 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.…