USB supercapacitor filter - snake oil, or?

[ppataki]

I just bumped into this:

USB 5V Supercapacitor Filter

This 5V USB filter gives you clean power for your Hi-Fi devices, thanks to two 20F - 3.0V capacitors and an intelligent buffer system. Input is via a USB-C port and output via a USB-C or USB-A port.

www.audiophonics.fr

Any thoughts?
Is this pure snake oil or is it worth considering?
Thank you

 

[fpitas]

Probably good, if you have stock in the company Otherwise? Pretty questionable.

 

[OldHvyMec]

https://www.aliexpress.us/item/3256804639375137.html?spm=a2g0o.detail.1000014.21.11583FPE3FPEmB&gps-id=pcDetailBottomMoreOtherSeller&scm=1007.40050.362094.0&scm_id=1007.40050.362094.0&scm-url=1007.40050.362094.0&pvid=2b514416-8eba-43ac-9f42-a319d6e8c799&_t=gps-id:pcDetailBottomMoreOtherSeller,scm-url:1007.40050.362094.0,pvid:2b514416-8eba-43ac-9f42-a319d6e8c799,tpp_buckets:668%232846%238112%231997&isseo=y&pdp_npi=4%40dis%21USD%2128.54%2119.98%21%21%2128.54%21%21%402101fb1417018858880262167e2f56%2112000030629660272%21rec%21US%212867435954%21AB.

19.98 on AliExpress

There are another 2-3 dozen different choices to pick from. 3.00-250.00 usd. It's a noise filter. Do you have a noise issue?

Regards

 

[solderdude]

It does not break ground loops so any mains leakage or ground loops will still exist.
A super silent +5V is never really needed.
USB devices should be able to run on 'crappy' 5V anyway and are designed to operate on 'not so clean' 5V.

It might be handy if one only has a USB output that has max. 500mA or even lower max. current output and you want to feed a device that (momentarily) can draw more power than what the USB port can deliver. In this case a low current can be drawn (over a long time period) but you can draw much higher peaks from the device than the USB port could ever supply.

 

[DVDdoug]

Usually, you don't need a supercapacitor for noise filtering but if you've got a noise problem it may help.

It's not clear if it's isolated, so ground loop noise may still get-through.

 

[Dunring]

Either the Apple phone charger (5 volt) or Samsung ETA0U60JBE will have just as good performance. Only thing to watch for the is number of fake Apple chargers that were made for years.

 

[Killingbeans]

Any thoughts?

A really big capacitor will filter really low frequencies, but as far as I know those frequencies are never a problem on a USB 5v, and 20F would be massively overkill either way.

Supercapacitors are great for delivering huge amounts of current more or less instantaneously, but they don't really make sense in this application.

Is this pure snake oil or is it worth considering?

Possibly. Definitely redundant.

 

[wwenze]

Eww, don't you know supercapacitors actually run on chemical reaction? Do you want your music to sound more chemical?

 

[Killingbeans]

Do you want your music to sound more chemical?

Yes please

 

[restorer-john]

Is this pure snake oil or is it worth considering?

Not pure snake oil and likely quite useful for devices that have dynamic current demands. Placing such a device at the end of a long USB cable would go a long way to preventing momentary voltage drops.