Computer Audio Asylum

Music servers and other computer based digital audio technologies.

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RE: RPi-4B and Power ?? Buck-Boost converter IC

Posted by AbeCollins on January 15, 2021 at 06:57:33:
I have the iFi iPower and it works about as well as my $6 wall wart smps from Amazon ;-)
Inmate E-Stat reports that his Raspberry Pi sounds better with an external USB battery.
The only reason I can think of that might support the improvement from a technical perspective is that the battery is isolated from the AC mains during operation. Otherwise, USB battery packs are essentially DC-DC converters (switching power supplies) in that the relatively low 3.6v from the Li-Ion battery needs to be boosted to 5vdc. If there are 3.6v batteries in series in the battery pack, the higher voltage needs to be bucked down to 5vdc.
As for iFi's marketing department, they really know how to spin tech ;-)
iFi ad from a couple years back:
I think they pulled the ad cuz too many folks laughed at them!

Come on iFi, it's just a freak'n wall wart!