TPS23753A: TPS23753APWR

Josh5566

Part Number: TPS23753A
Other Parts Discussed in Thread: TL431, TLV431

Hi Sir,

We would like to confirm the R136 is 39KΩ whether the valure is correct. because if it placed to 13.3kΩ the Voltate output is 10V rather than 5V from our design.

5228.SCHEMATIC1 _ 17 PoE.pdf

Josh

over 1 year ago

0 Josh5566 over 1 year ago

Prodigy 180 points

Hi Sir,

Just mentioned that we have followed the EVM(TPS23753AEVM-001 Evaluation Module for TPS23753A (Rev. A) about the value of R17 is 13.3KΩ.

The output looks seem output 10V.

+1 Diang Xing over 1 year ago in reply to Josh5566

TI__Mastermind 27391 points

Hi Josh,

It depends on the reference voltages.

TL431 in your schematic has 2.5-V Vref, and TLV431 in TPS23753AEVM has 1.24-V Vref.

For your case, Vout = 2.5V/39k*(39k+41.2k) = 5.14V.

Best regards,

Diang

0 Josh5566 over 1 year ago in reply to Diang Xing

Prodigy 180 points

Hi Diang,

Thanks for your confirm, we are investigating why the TL431 component was placed incorrectly.

The issue has solved.

Power management

Power management forum

TPS23753A: TPS23753APWR