TPS23754EVM-383: TPS23754EVM-383 output modify to 24V for forward architecture

Kevin.Peng

Intellectual 780 points

Part Number: TPS23754EVM-383

Hi Sir

We need to design from TPS23754EVM-383 output modify to 24V for forward not to use flyback architecture.

Could you help recommend release schematic application and BOM document to us, thanks

Spec. Output 24V/25W

Sincerely,

Kevin

over 4 years ago

0 Brett Colteaux over 4 years ago

TI__Expert 3700 points

Hi Kevin,

Thank you for your question.

Unfortunately we do not have a forward PoE solution for 24V. For 24V, the typical topology will be a flyback and not a active clamp forward like shown in the below link which also uses the TPS23754 and the -420 EVM to implement 24V.
https://e2e.ti.com/support/power-management/f/196/p/129664/690037#690037

Thank you very much and please let me know if having many other questions.

Best Regards,

Brett

0 Kevin.Peng over 4 years ago in reply to Brett Colteaux

Intellectual 780 points

Hi Brett,

I still hope to use the active clamp forward topology. tried to modify the TPS23754-383EVM implement to 24Vout, from the -420 EVM circuit to modified to the -383 EVM circuit,

Please refer to figure,

How to connect as (A)?
(B) Is this Gate2 going the original path?
Please check it out for me, there are no errors, thanks

Sincerely,

Kevin

0 Darwin Fernandez over 4 years ago in reply to Kevin.Peng

TI__Mastermind 40100 points

Hi Kevin,

Please see attached which might make it easier (visually). But i recommend modifying the -420EVM since it is a flyback topology. There would be too much to modify if the -383EVM.

The diode looks backwards also you still need to modify the bias winding since it's now a flyback design. The output inductor is also much too high for flyback.

5023.HPA420C_24V_sch.pdf

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TPS23754EVM-383: TPS23754EVM-383 output modify to 24V for forward architecture