TPS2373: dual port output solution

Tommy Tzeng

Genius 5850 points

Part Number: TPS2373
Other Parts Discussed in Thread: UCC2897A

Hi Sir,

i already suggested the TPS2373 + UCC2897A solution to the customer for output 12v/10A 120 watt.

but customer condition as below:

Dual port 802.3bt PSE supplies power to 2port 802.3bt PD, PD side outputs each 12V/10A.

this soluiton requires two sets of TPS2373? how to design it, please kindly let we learn from your.

over 4 years ago

+1 Michael Pahl over 4 years ago

TI__Mastermind 21320 points

Hello Tommy,

Please review our Beyond BT application note:

https://www.ti.com/lit/an/slva986/slva986.pdf?ts=1612815907629&ref_url=https%253A%252F%252Fwww.google.com%252F

This is how to use two PD's with one DCDC.

Alternatively, they could use two PD's and two DCDC's. This would basically combine two "standard" designs together. They get combined at the output. Thanks!

If this post answers your question, please indicate so by marking this thread as resolved. Thank you.

Regards,

Michael P.

Applications Engineer

Texas Instruments

0 Tommy Tzeng over 4 years ago in reply to Michael Pahl

Genius 5850 points

Hi Michael,

thanks your help and reply. and so you mean direct parallel connect? right? regarding the PD side.

the PSE port will be cut-off? will this problem exist?

+1 Michael Pahl over 4 years ago in reply to Tommy Tzeng

TI__Mastermind 21320 points

Hey Tommy,

Yes, connect it like pictured in Figure 4. We connected it like this to test. You can see experimental results in section 4. Thank you!