PSU Efficiency – Internet Router
I’m looking at replacing the supplied PSU to a mains-powered router (currently 240VAC > 12VDC), to operate instead via a high-capacity battery (field use), to increase efficiency (reducing wasted energy and heat dissipation), and therefore increasing operational time from said battery. The router PCB demands ~+12VDC IN, but then converts (DC-DC) down to +4VDC.
My question is: what, theoretically, would be an ideal to achieve this goal, ie. +5VDC > +4VDC, +9VDC, +12VDC. I’d be using Analog Devices’ LT3045 chip to achieve this, which has a very low ‘drop out voltage’. My own understanding is that the highest achievable efficicency should be where VIN and vOUT are closest to each other, but that other factors may play a part in the final efficiency rating.
Kez
