You can make a very simple flyback converter that can have several isolated outputs and run from 5 or 12v. It would be much cheaper than 4 separate converters. -- Martin K On 4/26/07, Gerhard Fiedler wrote: > rlistas wrote: > > > I pay here (Brazil) about 10U$ each. > > That's what I figured. I'd need 4 of them (two full bridges); this adds up > :( > > > I need a 0 - 100 % duty cycle variation, and is very robust. > > That's what I also need. (Not so much 0%, but 100%.) > > So far I think that either a low-current auxiliary voltage that is high > enough above my 8V-16V supply (plus a few zeners) or the HIP4081 should do > that quite a bit cheaper. > > Thanks, > Gerhard > > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > -- Martin Klingensmith -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist