5v supply amp modules?

[noviygera]

Hi,

I need to make a portable, powered, mono speaker.
Power source will be a 5v power bank. Need a compact, 15-50w output amp module that works from 5v supply. Anything out there? Ideas?

Thanks!

 

[noviygera]

Are there better options than a TPA3118 60W Mono Amplifier Board (???) -- it would need a DC-DC boost converter to get supply from 5v to 20v. I assume there is an efficiency loss there. Looking for a more elegant solution...

 

[kodabmx]

5V power bank will power that for a few minutes...
You really need class D for this.

 

[noviygera]

Yes, any class D modules that fits the requirements, would be appreciated.

 

[kodabmx]

No. It's just physics. 1 watt from 5 volts? Sure. But 15 watts from 5V is a struggle. 60W it right out.

 

[noviygera]

I thought the 5 V gets boosted in the amp module…

 

[NareshBrd]

Use a laptop battery, or 18650 cells in series.
More voltage, and more options.

Discharge rate at 60 watts will maybe cause a fire in power bank, which is dangerous, as you are asking 12 Amps from a 3.7V cell boosted to 5V.
That is Englishman speak, an American would use stronger language.

 

[Yatsushiro]

If you want to run a RPi Zero, then this is possibly one of the best options. You can select mono output in the RPi software. You'll need a good powerbank:

https://www.infineon.com/cms/en/product/evaluation-boards/kit_40w_amp_hat_zw/

Alternatively, I use a number of these in BT speaker builds (stereo, not mono):

https://www.aliexpress.com/item/329...ab!66517632763!sea&curPageLogUid=28eEP4PAPinK

Here's a mono amp:

https://learn.adafruit.com/adafruit-max98357-i2s-class-d-mono-amp


Apart from the RPi solution, I'm guessing you'll also need a 5v BT module:

https://www.aliexpress.com/item/100...00026884840784!sea&curPageLogUid=K5KdaQvccNZ3