• LTC4279 Demo circuit

    Hello,

    We included the DC2541 in our design & currently testing it. We are injecting voltage externally. But we see that the voltage clamps due to some reason. Of course we checked the impedances for the pins 9 & 4. Please provide some debug tips on the…

  • LTC4279 RPM abnormal setting

    Hi,

    if LTC4279 RPM is in a abnormal state.

    Like Open/Short/Out of window.

    What will happen?

    If the fuse is necessary for the safety certificate?

    Thanks a lot.

    Please kindly help with this.

  • LTC4279 MOSFET selection

    Is there any other MOSFET that can be used as the external switch with an LTC4279 PoE PSE controller?  The data sheet strongly pushes the Nexperia PSMN075-100MSE and PSMN040-100MSE as the only choices, and they're out of stock worldwide for 6 to 16 months…

  • LTC4279高温无输出?

    用LTC4279做的PSE端供电,TYPE1,13W。连接Motorola的IP电话使用(IP电话不在温箱里)。常温下插拔一次后等个5,6分钟再插上,没有问题,可以正常供电。

    但高温70度时,同样操作,插拔一次后等个5,6分钟,这时再插上就没法供电了。 

  • 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…

  • PD Design Query for UltraPWR Mode of LTC4279

    Hi,

    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…

  • LTC4279、LT4293输出波形问题

    使用LTC4279做PSE端48V供电,LT4293做PD端,连接后测量VPP和VPN两端电压发现如下图波形,之后一直是如此循环状态是什么原因? ,PSE原理图如下图所示 ,PD原理图如下图所示

  • RE: LT4275 cannot deliver power above 30W eventhough designed for LTPoE++

    Check out LTC4279, Single Port PoE/PoE+/LTPoE++ PSE Controller. DC2541A supports up to 90W LTPoE++ PDs.

    Best Regards,

    Eric

  • RE: LINEAR Technology IC Controller for project an INJECTOR to supply Ethernet

    May be the LTC4279 (DEMO MANUAL DC2541A) with a Boost DC/DC Converter Power Supply (24V to 55V/57V) may be the best choice ??

  • RE: IC Controller for project an INJECTOR to supply Ethernet

    May be the LTC4279 (DEMO MANUAL DC2541A) with a Boost DC/DC Converter Power Supply (24V to 55V/57V) may be the best choice ??