IRS 2092 AMP TEST AP SYS 2

[ljm_ljm]

Use the AP 2700 plus special digital amplifier test module.
We can measure of IR digital power amplifier.

Perhaps IRS2092 is currently one of the best digital power amplifier performance. I only care about performance.

 

[ljm_ljm]

Reference analog amplifier contrast: model MX50X2 music facsimile circuit

 

[ljm_ljm]

Contrast type my own design analog amplifier L12-2
CFP structure, SANKEN output transistor
TEST AP SYS 1

GAIN =30， OUTPUT power about 50W

 

[Marlen]

I have been testing Shure Hi-Fi 2x250W
and Blue PCB L15Dx2 from here
All measurements with Vout=12V; R=3,75Ohm.
28Hz harmonic due to video cooler near position to sound card.
Also there is no passive volume regulator that means that real noise is lower. I have spectrum of blue PCB with volume regulator Vout=2V; R=3,75Ohm.
I think Iraudamp7S is the very good price/performance amp but not best in digital.

 

[colossusfan]

To be sure the IRS2092 is a great little chip, but it's only a control chip!! nice to see some plots published, however some companies make a right mess of implementing amplifiers using this chip so it's very much buyer beware. Common problems are unsuitable mosfets, poor output inductors, completely crazy values in current limiting, garbage deadtimes etc the list is almost endless as much copying and alteration of the original IR application notes has taken place without understanding resulting in some frankly unfit for purpose modules with exorbitant specification claims!! However having said that in a good design the output power is far ahead of anything presently available with an integrated output stage.
Rant over chaps 🙂

 

[ljm_ljm]

To be sure the IRS2092 is a great little chip, but it's only a control chip!! nice to see some plots published, however some companies make a right mess of implementing amplifiers using this chip so it's very much buyer beware. Common problems are unsuitable mosfets, poor output inductors, completely crazy values in current limiting, garbage deadtimes etc the list is almost endless as much copying and alteration of the original IR application notes has taken place without understanding resulting in some frankly unfit for purpose modules with exorbitant specification claims!! However having said that in a good design the output power is far ahead of anything presently available with an integrated output stage.
Rant over chaps 🙂

I agree with you very much.

In fact most DIY is not tested.

In addition, don't be overly exaggerated digital power amplifier, because now the world's best power amplifier HIEND products, is still analog amplifier as the main.

I have been testing a few small power of digital power amplifier.
Widespread computer multimedia active speaker inside.

Their distortion sometimes can be more than 2%.

From the sound they TDA2030A than many years ago.

Sometimes new products, power amplifier will not ascend, may be reduced.

In fact, most of us, including me,

Power amplifier using no more than 20 watts of power.

I hope more and more people attach importance to the quality of sound, how many watt. Rather than the largest can output.


Not many people will use less than 76 db speakers. Power for us, it is not important.

 

[ljm_ljm]

I have been testing Shure Hi-Fi 2x250W
and Blue PCB L15Dx2 from here
All measurements with Vout=12V; R=3,75Ohm.
28Hz harmonic due to video cooler near position to sound card.
Also there is no passive volume regulator that means that real noise is lower. I have spectrum of blue PCB with volume regulator Vout=2V; R=3,75Ohm.
I think Iraudamp7S is the very good price/performance amp but not best in digital.

Forgive my English is very poor.

I like to see you said L15DX2. This I can understand, because it is what I do. Laugh.😀

I don't quite understand your test figure is what type of circuit boards, though I know it is IRS2092.

But different circuit boards, capacitance, and inductance, the data will be a larger difference between the two.