Hi, we are starting the development of a 400W, 230v input, 24V output supply.

Please guide me about the most efficient and racional aproach, because I can't decide about the IC to use.

These are the caracteristics needed:

input: 190 to 260 VAC

freq: 50Hz

PFC: yes (0.98/0.99)

power: 400W

output:  2 versions, one 14Vcc and another 24Vcc

IP67, epoxi encapsulated

thermal target average 55/60°C (on 25°C ambient)

Also, derived from this supply would be a smaller version (250W) so a basic compatibility on components is a must (for production line)

If the  peripheral components could be trough hole, would be great, we prefer that to SMD 

We decided to buy the mangnetics samples from you (rapid transformer service) and production from one of your partners.

Thanks in advance.

Leonardo Cei  R&D head Engineer SM Electronica, Buenos Aires, Argentina.