PAM8610 powered by 5V charger & LiPo batteries?

Status
Not open for further replies.
Jump to Latest
C

CZ Eddie

Member
Joined 2003
#1
Arghh, I bought a couple PAM8610's because they looked like the PAM8603's I already have. I just wanted a few more watts for a power hungry speaker.
The 8603's work fine off my LiPo batteries.

But I just noticed the 8610 isn't spec'd the same for power requirements.
Specs:
  • Model: PAM8610
  • Work: Class D (PWM modulation type)
  • Power Range😀C6V-15V (self-protection)
  • Recommended voltage：DC 12V2A

BUT,,, I'm using a 5V 1A Lithium Battery charging board connected to some 500mAh LiPo batteries.
So am I right to think this won't work well?
 
#3
A single LiPo is well under the recommended minimum voltage. If you want more power, you need more voltage (and current). You will need a battery setup that will output at least the 12V recommended in the specs.

Something like this...

http://www.ebay.com/itm/Useful-12V-...US_Rechargeable_Batteries&hash=item4ada5db2c0

If you're cranking the volume you might only get a couple hours out of it though. Definitely not 20 hours.

There's larger capacity packs like that available, but the size and price increases proportionally.
 
Last edited:
#4
theAnonymous1 said:
A single LiPo is well under the recommended minimum voltage. If you want more power, you need more voltage (and current). You will need a battery setup that will output at least the 12V recommended in the specs.
Click to expand...

Thanks, that's what I figured.
Dangit. And I bought several of these 8610's without even checking the voltage requirements.
There is all sorts of Google-fo (in-fo) about stepping down from 12v to 5v but Googling up the opposite has proved difficult so far.
 
#5
Well, stepping up from 5V to 12V isn't that difficult. There's lots of pre-made modules of that sort available. The problem is the (relatively) HUGE amount of current that's needed from the 5V source. Even worse if you're talking from a single Li-Po cell to 12V.
 
#9
lutkeveld said:
That pack won't give anywhere near 12 hours run time. You should look for 2500 to 3000mAh minimum.

For the charger: If you want it really smal, you can DIY something together with two USB single cell chargers like this:
1A Lithium Battery Charging Module Blue at Cheap Price Online
Click to expand...

Okay, it took me a bit to figure this out.


All lithium Polymer cells have a nominal voltage of 3.7v per cell.
A 1S = 1 cell (3.7v). If the LiPo pack is listed as being 3S this means it is 3 cells x 3.7v (per cell) which is 11.1v. It has 3 layers of 3.7v each.
See more at: Choosing a LiPo Battery | Flite Test
Click to expand...

So it would basically be using one of those tiny chargers for EACH cell.
At that point, the only hard part is removing the MicroUSB adapter to hard-wire the charging source, or to split it off.
Neat idea.

Right now I'm trying to find a 3C battery with nice output.
Here's a "battery finder" where you input specs and it locates batteries for you. Limited selection though. I'm still looking around.
R/C Hobby Lithium Polymer Battery Filter List
 
Status
Not open for further replies.
Top Bottom