IRAUDAMP21 Datasheet, PDF (7/22 Pages) International Rectifier – 90W/2Ω x 2 Channel Class D Audio Power Amplifier Using the IR4321

Performance and Test Graphs
Power vs THD+N
Test Conditions:
VBus = ± 18V
Input Signal = 1 KHz
Load Impedance = 2 ohms
Set Gain = 1% clipping 70W
10
5
2
1
0.5
0.2
%
0.1
0.05
0.02
0.01
0.005
0.002
0.001
100m
200m
500m
1
2
5
W
Sweep Trace Color Line Style Thick Data
Axis Comment
1
1
Red Solid
3
Anlr.THD+N Ratio Left CH1
1
3
Blue Solid
3
Anlr.THD+N Ratio Left CH2
Power vs THD+N (with heatsink)
Amp21_22 PWR vs THD.at27
Figure 3
10
20
Test Conditions:
VBus = ± 22V
Input Signal = 1 KHz
Load Impedance = 2 ohms
Set Gain = 1% clipping 100W
10
5
2
1
0.5
0.2
%
0.1
0.05
0.02
0.01
0.005
0.002
0.001
90m
200m
500m
1
2
5
10
20
50
W
Sweep Trace Color Line Style Thick Data
Axis Comment
1
1
Red Solid
3
Anlr.THD+N Ratio Left CH1
1
3
Blue Solid
3
Anlr.THD+N Ratio Left CH2
Amp21_22 PWR vs THD.at27
Figure 4
50
100
100
200
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IRAUDAMP21 REV 1.0
Page 7 of 22