Hi Daniel,
We don't have any reference designs for PD at 20W. The lowest power AC/DC reference design with PD is 45W: https://www.ti.com/tool/PMP40183
For lowest cost solution, I would recommend our new UCC28750 device at this power level. https://www…
Hello Tony,
I don't believe that TI offers a low power off line converter with an internal MOSFET to achieve 30W. The UCC28740 and UCC28742 controllers can achieve 30W quite easily with an external MOSFET.
The following link will get you to a reference…