Q:

AC-DC converter (120-230VAC)

We are designing a circuit which should be powered directly from mains (230VAC), and have in the previous design used a normal transformer. 
But in the next design we would like to use an AC-DC converter, since this could make our design more flexible with possible input of 120VAC to 230VAC 50/60Hz. 
The output of the converter is preferred to be 5VDC but could be higher. 
I have found the bp5048-15 from ROHM, which would do the job. 
www.rohm.com/products/databook/pm/pdf/bp5048-15.pdf
Does anyone have a better or cheaper solution? 
EDIT: wall adaptor is not an option, we need to supply the product directly with mains.  

A:

A Power Integrations TinySwitch can also be used to make a simple non-isolated rail for low-power applications.  I've had success with these parts in the past. 
http://www.powerint.com/en/products/tinyswitch-family
(apologies for the pasted link, SE sites with iOS Safari are painful to use)

