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i Wanna use the DACportslim As portable DAC/Amp using an external Lithium polymer battery 3.7V 2500mAh, so i have a few questions hoping you'll reply.
1) Do i need to implement a boost converter to 5V?if not with a 3.7V am i going to have less current or simple less heat?
2) The max power output is 450mW@2.9V but as class A what's its efficiency? i'm worried that in the best scenario 2500mAh won't last 5hr.
Thank you in advance and compliments for the good work on this device.
Hi Alex, you need to feed it 5V, so consider using a standard battery pack such as the ones used to give extra power to phones. Power consumption depends on headphone impedance and how loud you are driving the headphones. There will be a baseline of about 250mA, due to the high quality of the internal circuitry.