TPS23756: Can TPS23756 recognize the conversion from PoE to PoE without re-negotiation?

Qian Kang-He

Prodigy 10 points

Part Number: TPS23756

Tool/software:

Hi,

If the switch(PSE) provides PoE at the first time and then PD side send request to PSE converts PoE to PoE+ via LLDP.

Is there a way for the chip to know the status of the conversion to POE+ without re-negotiation?

8 months ago

0 Diang Xing 8 months ago

TI__Mastermind 37111 points

Hi Kang-He,

PoE team is doing internal validation tests and the reply on E2E may be delayed for 3 - 5 business days. Sorry for the delay and thanks for your patience.

Best regards,

Diang

0 Diang Xing 8 months ago in reply to Diang Xing

TI__Mastermind 37111 points

Hi Kang-He,

Thanks for your patience.

The LLDP is not a communication between PSE and PD controllers normally. It is normally between PSE's host and PD's host. In your case, the PSE-PD normally won't redo detection and classification, but the power allocation on the PSE side will be modified from PoE to PoE+ after LLDP.

Best,

Diang

0 Qian Kang-He 8 months ago in reply to Diang Xing

Prodigy 10 points

Hi Diang,

Duly noted, thank you for the update.

BTW, is there any IC can meet the requirement on the above to recommend?

Best,

Qian

0 Diang Xing 8 months ago in reply to Qian Kang-He

TI__Mastermind 37111 points

Hi Qian,

PoE team is doing internal tests and the reply on E2E may be delayed for 3 - 5 business days. Sorry for the delay and thanks for your patience.

Best regards,

Diang

0 Diang Xing 8 months ago in reply to Diang Xing

TI__Mastermind 37111 points

Hi Qian,

Thanks for your patience.

PD and PSE will not cause troubles for LLDP.

If you are asking chips can do LLDP, you may check with TI's Ethernet PHY team or MSP430 or MSPM0 team. They may have more expertise on this.

Best regards,

Diang

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TPS23756: Can TPS23756 recognize the conversion from PoE to PoE without re-negotiation?