If you look at the graphs called "Efficiency Vs load current" page 12 of the datasheet, you will see that it has better efficiency with low input voltage.
Stanislav Meduna a écrit : > Antoine Zen Ruffinen wrote: > > >> Anyway, in general, giving the lowest input voltage >> to a regulator that you can (but not to close from the lowest limit), is >> a good idea. it will ask less effort from the regulator. >> > > This is very true for linear regulators, but for switching > ones it might actually be the opposite - higher voltage > means less current and less wasted energy. > > To the OP: The 28 V is too close to that 30V, especially > if the power supply is unregulated. Better go with the 20. > > _______________________________________________ Soekris-tech mailing list [email protected] http://lists.soekris.com/mailman/listinfo/soekris-tech
