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Dayton Audio DTA-2 Class T Digital Audio Amplifier Module
Battery Power Options
Can this be powered by the output from a “new iPad” battery back up?The specific unit I am looking at is a 7000mAh External Battery Pack.It has duel output 5V/2A and 5V/1A. Can the 5V/2A run the amp? I like this unit as I could power a Bluetooth module of the 1A side…
No, you need a 12 volt 2000 ma power supply and your unit is only 5 volts. Even though you have sufficient current (amps) you lack the voltage required for rated output.
Date published: 2013-08-13
could you power 2 of these amps with one ac adapter
just wondering if you could power 2 of these amps with one 12v 2a ac to dc adapter i have a project in mind that will need 2 amps but don't want to have 2 power supplies connected to it thanks
Yes, you could do that, but there won't be enough available power to drive the both amps to full volume. With a 2 amp power supply, there isn't even enough available power to drive one amp to full power.That said, if your volume needs are low or you have sensitive speakers then yes. Otherwise I would get power supply that can provide more current.
Date published: 2013-01-22
How could I power this and a usb charger (5v) off of the same 12v input?
I have this working with a 12v power input, but I want to be able to charge an iphone off of the same power supply.
Best way is to wire a 7805 regulator between the 12VDC input and the 5VDC output. This is available here (see below). Charging an iphone should not require a heat sink on the 7805. If the chip gets too hot, heat sinks are available at your local Radio Shack.
Date published: 2013-03-24
Would it be possible to get an actual schematic to this amp instead of the TA2024 Application/Test Circuit from the Tripath Data sheet? The DTA-2 looks fairly close to the Evaluation Board minus a VDD Filtering capacitor and access to the Sleep/Mute/Fault Pins.
Yeah I doubt the actual schematic will be provided. I did some simple continuity testing and came up with an introductory cheat sheet dealing with the connectors and added basic LED and TRS stuff(1). With the TD2024 and EB-TD2024 datasheets(2,3,&4), I think I can make some educated guesses.
Date published: 2013-04-02
What is the input impedance of this amp
That is a great question. I don't know why, but there are a precious few of us in the DIY audio community who care about input/output impedance. No manufacturers seem to care, and some of them use blatantly incorrect information (see the obviously false output impedance of Parts Express product number 180-997--and I've even posted a question to clarify).Anyway, the input impedance of the Tripath chip in the DTA-2 is 100K ohms. *IF* there are no resistors in the signal path that would change that, it would be 100K ohms. I have not gotten out a magnifying glass and followed the trace, but it is my belief that there is a resistor network in front of the chip signal input that brings the overall input impedance down to about 10K ohms. I'm sure that isn't what you wanted to hear but I think you need to plan on it being as low as 10K ohms for design purposes.No passive pre-amps without an op-amp buffer with input impedance that low :(
Date published: 2013-09-23
I would like to know if I need to worry about having some sort of low voltage cutoff if I am going to be powering via 12v SLA Battery. I
shouldn't have any problem :-) iv been running one from a 2000maH 12v Li battery for years. it will run for 10+ hours and pull the battery down to 6v or so before shutoff.
Date published: 2013-02-05