I have a 5V 10A 50WATT DC step-down converter: http://www.powerstream.com/dc-24V-5V.htm
I'm just not understanding how to size the power supply needed to drive this converter at max power.
I have an iGo 15-24V 6.5A 100W Max (130W peak) powersupply. Is that going to be sufficient to drive the step-down converter when it's under max load itself?
Am I understanding correctly, that if I have a 50WATT load, it is always going to need a minimum of 50WATT of power regardless of what voltage is driving it? I understand there will be a loss of efficiency in the step-down, so what's a rule of thumb (10%-100%) for gauging the necessary capacity on the supply.
Or am I missing something fundamental?