[Soekris] net4801 DC INPUT
Antoine Zen Ruffinen
antoine.zen at gmail.com
Wed Dec 19 18:37:57 UTC 2007
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
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.
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