TPS23880: The BT channels of TPS23880 are independent of each other

Hi Fubo Ke!

The TPS23880 is an 8 channel device capable of supporting either 8 2-pair ports or 4 4-pair ports with Type 3 or Type 4 PDs. In 4-pair configuration, one RJ45 port uses 2 channels (ALTA and ALTB) to deliver power. The only point that is shared between channels is KSENSA,B,C,D. There is one KSENSX pin for every two channels. What sort of interactions are you seeing? How are your ports configured? Can you provide waveform captures that show the problem you're having?

Thank you,

Aidan Davidson

Hi Fubo Ke!

Were you able to obtain waveform captures that show the interactions you're experiencing?

For more information about the IEEE802.3bt standard and TI's PoE products, take a look at this website --> www.ti.com/poe

Within that portal we have an extensive array of .bt PoE training videos here --> https://training.ti.com/power-over-ethernet-getting-started-new-standard

Also, for the TPS23880 datasheet and other related information, take a look here --> http://www.ti.com/product/TPS23880

Thank you for reaching out to us and we look forward to hearing back from you!

Aidan Davidson