• LTC4266 semi-auto mode setting problem

    Hi Sir,

    We have set the Operating Modes of LTC4622 to Semi-auto,
    After the PD is connected for the first time, the power supply can be restarted, and the information read is correct.
    Such as: power enable(addr 0x12 bit0-3),Voltage(addr 0x32, 0x33, 0x36…


    Dear Sir,

    The LTC4266 controller does not work properly, so the PD is not properly supplied with power, or PoE Link does not attach even if the power is supplied.

    The peculiarity is that if the controller is software reset, it will operate normally again…

  • LTC4266 showing huge value in Parametric measurement - voltage


    I have configured LTC4266 with Auto pin mode and am able to read voltage and current value when I connect the PD device at the PoE port. voltage and current values are coming properly.
    Unfortunately, When I connect the non-PD device on the PoE port…

  • LTC4266 VDD circuit with enough current for isolated I2C

    Can you please suggest a suitable LDO circuit to provide VDD to LTC4266A and also a 3.3V supply for a I2C digital isolator? I need around 20mA of current in total. 

  • LTC4266 Fault Delay time


       For the application of ltc4266, I need to change the fault delay time which is from icut fault to next detect to 10 seconds. How should I set it? Is it from the register?

    thank you!

  • LTC4266 schematic check

    Hi ADI expert

    I use LTC4266 to design a 4 port POE IPC

    May I have your help to check my schematic as attachment

    I didn't generate -54V from a isolated power supply but simply generated it from my 12V power source with LTC's boost LTC3769

    so I 

  • LTC4266 test on sifos


    We have a issue when LTC4266 test on sifos in auto mode .

    PWRUP_time / PWR-On_Rise_time_Trise. The result is 14us<15us (Low Limit) in Af (15.4W Test)

    We try increase Cin with no impact.

    Does there any other method to lower down the rise time?…

  • LTC4266 and POE specs info


    I am designing a carrier board with 16 POE PSE channels in addition with 4*4 ports marvell 88E1548 phy. For the moment, i don't know if the distant devices will draw more than 12.95W so i considered the LTC4266 POE+ PSE as a start.

    I have read…

  • LTC4266 IC is damaging repeatedly in our product

    We have designed a PoE module using LTC4266 IC and recently we have been observing that LTC4266 IC is burning after running for some time.

    Suggestions and comments are highly appriciated

    Attached schematics for reference


  • register value for LTC4266 90W mode

    Dear ADI-er.

    Why the vlaue is different two cases(Code & Picture)?

    Plz help me.

    PortHandler.c of SemiAutoHost_LTPoE++_4266_v1p7p1_Apr_09_2012.zip

       switch(class) {
          case CLASS_1:   cut = 0xC6; lim = 0x80; break; // CUT=112mA; LIM=425mA
          case CLASS_2: