Hello,
Looking at switching to the TPS23758 design, as the module we are currently using dissipates too much heat. I notice many of these threads are taken to offline discussions, which I am happy to do. Briefly, this is an Audio Over IP device. Current draw is AVG 0.978 mA (1.017 MAX at turn on) @ 5v DC.
Looking forward to discussing the best TI solution.
Regards,
Colin
Hey Colin,
So sorry I read that incorrectly, i thought there was a thermal issue with our part.
So there are a couple of options. The TPS23758 is our most integrated solution. It integrates the PoE PD, PWM controller and the primary switching FET. It also uses primary side regulation, which eliminates the opto-feedback BUT transformer selection is critical and the options are limited.
The catch is that the TPS23758 designs are all for 13W, so the efficiency is targeted for 13W. So to get the best efficiency the transformer would need to be changed and therefore a specialty design.
The other option is to use another one of our devices, namely the TPS23753A. My suggestion is to look at our Power Management Reference designs. Filter by POE input range (10-42 lower bound, 48-57 upper bound) and then output voltage and current. I set it up, hopefully the link transfers properly for you. These will be optimized for 5W of power, and will have more flexibility in the part selection. But the primary FET is not integrated.
If this post answers your question, please indicate so by marking this thread as resolved. Thank you.
Regards,
Michael P.
Applications Engineer
Texas Instruments
