TPS23731:Use of “Boost” in the PoE daisy chain.

servan tenik

Other Parts Discussed in Thread: TPS23731

Parça Numarası: TPS23731

Araç/yazılım:

Hi Diang,

what is the "boost" used for in the daisy chain circuit? Can we give the voltage from the Ethernet port (RJ45) directly to the input of the PSE?

Thank you.

2 months ago

+1 Diang Xing 2 months ago

TI__Mastermind 37121 points

Hi Servan,

Since the PSE output voltage needs to be high enough to pass the compliance. For example Type-3 PSE needs 50V - 57V port voltage. But if the PD before has a long cable the bus voltage may drop below this range. In this case, a boost converter is needed to make sure the desired port voltage can meet.

Best regards,

Diang

0 servan tenik 2 months ago in reply to Diang Xing

Prodigy 50 points

Thanks for the answer.

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TPS23731:Use of “Boost” in the PoE daisy chain.