can't get my head around PSU's, help choosing.

[gafhenderson]

can someone tell me what size power supply i would need to run these from?

Product Number
AA-AB33182
Product Name
4*100 watt @ 4ohm, TK2050 D-class Audio Amplifier Board
for subwoofers.
10-32v input

Product Number
AA-AB32181
Product Name
2*100 watt @ 4ohm TK2050 Class-D Audio Amplifier Board
speakers.
10-30v input

would this work well?

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thanks for your help.

 

[runebivrin]

Should work OK. But you won't be able to drive all those amps at full power with just one PSU; there's not enough current available. For normal use with music you shouldn't have a problem.

 

[AndrewT]

yes, that PSU will power the amplifiers.
You may need to add some filtering between PSU and amp PCB.

Are you aware that these are not 100W amplifiers?
Each amp is more like a 30W to 35W specification when run on 30Vdc.
On 24Vdc they will be considerably less.

 

[gafhenderson]

Should work OK. But you won't be able to drive all those amps at full power with just one PSU; there's not enough current available. For normal use with music you shouldn't have a problem.

i was planning on running each module from its own power supply, i'm just completely confused as to what i'm looking for. i read a link on making your own specifically and it messed my head up for hours of reading the same article over and over again.

yes, that PSU will power the amplifiers.
You may need to add some filtering between PSU and amp PCB.

Are you aware that these are not 100W amplifiers?
Each amp is more like a 30W to 35W specification when run on 30Vdc.
On 24Vdc they will be considerably less.

care to expand? especially the filter part?

4 Channel 100W TK2050 D class Audio Amplifier Board Assembled | eBay

as far as i was aware these were internally bridged amp modules.

thanks for the replies.

 

[AndrewT]

Don't try to build an SMPS.
Either buy a ready made SMPS or build a linear PSU.

Yes, the chipamps can be bridged.
I have never used an SMPS to power a chipamp, I can't tell you what might need to be added. Just a forewarning.

 

[Kay Pirinha]

100 watts @ 4 ohms means a voltage swing of 56.6 Vpp. Even in bridged mode you can't expect this voltage swing from only 24 Vdc, no matter if, or how you expand filtering. You will need a DC supply of at least 33-35 V for bridge mode, or 65-70 V for a single power output stage.

Best regards!

 

[AndrewT]

But, they are not 100W amplifiers.
The specification shows 30W @ sensible distortion.

The higher powers are shoving out squared off sinewaves.