I'm trying to run a 6V/1A motor from a 5V/2.2A USB battery pack (i.e. a phone-charger battery bank).
I'm using a Pololu boost converter to make 6A (>80% efficiency), but the motor never starts, it just makes a stuttering 'glitch' noise.
I've tried putting big smoothing capacitors over the voltage lines in case inrush voltage drops were causing problems.
Any other ideas: circuits, protection diodes, etc? Thanks!
EDIT: Hi everyone, thanks for all your input. 1) I don't have a spec sheet - it's about the size of a D-cell battery and has a sticker saying Made in Germany, 6V/1A on it. 2) Trying to add it to an existing bit of kit which runs off a USB battery pack (the motor doesn't start even with this other kit removed), 3) Tried a few other USB batteries, some work, some don't - quality/brand name doesn't matter , 4) I'll give a floating battery/supercap a go and report back.