Digital Ammeter Not Reading Amplifier

[Camerong]

True ok but would the multimeter not read it. I would think it would read the peak it is drawing?

 

[jan.didden]

True ok but would the multimeter not read it. I would think it would read the peak it is drawing?

Have you tried the ac setting?

Edit - Just thought of something else. Is this a class D with a differential output like a bridge? In that case, the supply currents may not go through ground at all!

Jan

 

[Camerong]

Yeah my multimeter detects ac or dc current.
It's a class D, I'm not quite sure what you mean by differential output so I'm guessing no. Haha but there is no bridging though just straight to the amplifier and straight to ground

 

[Pafi]

Have you tried the ac setting?

Edit - Just thought of something else. Is this a class D with a differential output like a bridge? In that case, the supply currents may not go through ground at all!

Jan

In a single supply system where could the supply current return if not on ground? The current is this low. Really.

DMM in DC setting measures average current. This is absolutely perfect for calculating run time for battery. No error.

 

[Camerong]

I know it's probably not the best way to do it. But would a voltage step up work? Because I've already brought an $80 battery and a $40 psu etc. I don't really want to replace them

 

[Camerong]

Thanks pafi. The current was around 0.05-0.1 when I cranked it right up. Even if this is the average current, I am very impressed with this amplifier. Sounds incredible and Im thirsty for more power! Haha I want to see what this amplifier has got to offer. 19-24v is apparently this amplifiers best range and I would like to reach that

Edit-
I found a dc-dc voltage step up. Looks good high efficiency, up to 5A.

https://www.pololu.com/product/2569

 

[DUG]

Spec sheet says with 12V it should draw 0.020A to 0.035A.

My setup showed 0.040V across 1R from 19V supply. ( 0.040A)

 

[Camerong]

Do you think it'll make a difference at 24v dug?

 

[Camerong]

I ended up buying the pololu 24v dc step up.
I'll see how it goes
How much current do you think I'll use at 24v?

 

[vanbcguy]

I'm running my TPA3116 at about 24V. Most of the time it is using around 0.1A. Under sustained heavy bass at full volume I do sometimes see 1.5A or so.

I ran my setup for over 5 hours cranked as loud as it would go without distortion and used 54 Watt-hours according to my panel meter. My battery charger agreed with that.

Sent from my XT1097 using Tapatalk

 

[Camerong]

Sweet what do you think about the step up to 24v. Will it work? I hope so as I've already purchased it. :/
I felt in a rush because they go on holiday tomorrow and the store closes down for a few days.

Having that each voltage should help with the bass right? That's the only thing it starts to fail at high volumes.

 

[vanbcguy]

If you look at the spec sheet for the TPA3116 chip it's maximum power output increases as input voltage increases - if you are capable of using that power then it will definitely help!

The converter should work though I'd be interested to see how clean the power coming out of it is.

Sent from my XT1097 using Tapatalk

 

[Camerong]

Sweet
Could always try it and see how it goes.
I should've gone with 24v from the start. But the one I brought looks like it was pretty Good quality.


Do you get any buzzing noise when you connect to bluetooth. Ithe only buzzing on connection

 

[vanbcguy]

I'm not using bluetooth at present - my board just has a 3.5mm input. I'm running an old Android phone with BubbleUPnP which I remote control from my "real" phone. Much longer range as it is WiFi rather than bluetooth!

I have seen another thread on here though with someone troubleshooting a noisy bluetooth setup...

Sent from my XT1097 using Tapatalk

 

[Camerong]

Ah right yes I had ordered one with a 3.5mm jack but it didn't come with one . Bit disappointed. Good Idea man good stuff. Might try that my next project. I have wifi led lights and it's brilliant!