TPS23756: About DC/DC inside TPS23756..

Peter Tseng

Genius 5720 points

Part Number: TPS23756
Other Parts Discussed in Thread: TPS2378, UCC2897A, UCC2897

Dear Sirs,

TPS23756 function is OK for my customer, however, they need discrete solution.

May I know which DC/DC solution is same with the DC/DC portion inside the TPS23756?

Thanks.

over 3 years ago

0 Brett Colteaux over 3 years ago

TI__Expert 3700 points

Hello,

Thank you for your question.

The DC/DC inside the TPS23756 is unique to the TPS23756 so there is no exact same discrete DC/DC solution.

However, if needing a discrete PoE PD + DC/DC solution for Class 4 power levels, the TPS2378 + UCC2897A are commonly paired together.

Please let me know if having any additional questions and thank you for interest in Texas Instruments PoE devices.

Best Regards,

Brett Colteaux

PoE Product Marketing Engineer

0 CF Hsu over 3 years ago in reply to Brett Colteaux

Prodigy 30 points

Hi Brett,

In out application,the Aux Vin will down to 10V.

However, UCC2897A's Vin_min is 18V, so UCC2897 is not appropriate.

Could you provide a DC/DC solution that is similar to TPS23756, so that we can keep our power transformer and feedback circuit?

Thanks.

0 Michael Pahl over 3 years ago in reply to CF Hsu

TI__Mastermind 21320 points

Hello,

Here is a TI reference design that uses the TPS23756 and has an input range of 10V-57V on the adapter: https://www.ti.com/tool/TIDA-00091

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 Brett Colteaux over 3 years ago in reply to Michael Pahl

TI__Expert 3700 points

Hello,

For discrete DC/DC converter stage only recommendations your best path forward is to post on the DC/DC forum and those experts will help guide you to a solution for your project needs.

Best Regards,

Brett Colteaux

PoE Product Marketing Engineer

0 Peter Tseng over 3 years ago in reply to Brett Colteaux

Genius 5720 points

Hi Brett,

May I have the link of DC/DC forum since only I can find is power management forum.

I want to post question again in DC/DC forum.

Thanks.

0 Brett Colteaux over 3 years ago in reply to Peter Tseng

TI__Expert 3700 points

Hello,

Please allow me to make a couple more comments. For your design, if not wanting to use PoE at all, the TPS23756 can be used as the DC-DC converter stage in your design. We have several customers using this device as their DC/DC stage only without PoE functionality.

Also, I searched our TI Design database for discrete DC/DC converters and found some prospective designs and devices that may be of interest: https://www.ti.com/reference-designs/index.html#search?vinmin=10&iout=5&vout=5&isolated=Isolated

Please feel free to use this database as a resource and when you find a prospective reference design or IC, I recommend using this forum link to ask questions about the DC/DC TI design or the IC that you are interested in and your question will then get routed to the DC/DC team.

Thanks!

Best Regards,

Brett Colteaux

PoE Product Marketing Engineer

0 Peter Tseng over 3 years ago in reply to Brett Colteaux

Genius 5720 points

Hi Brett,

About your suggestion for TPS23756 as DC/DC stage design, is there any reference schematics available?

Thanks.

0 Brett Colteaux over 3 years ago in reply to Peter Tseng

TI__Expert 3700 points

Hi,

We do not have a reference design of the TPS23756 as DC/DC only without PoE functionality. However, if not using PoE the Rclass, Rdetection, diode bridge, T2P circuitry, and diode between VSS & return can all be removed from the design.

Best Regards,

Brett Colteaux

PoE Product Marketing Engineer

Power management

Power management forum

TPS23756: About DC/DC inside TPS23756..