TDA7491HV Datasheet, PDF (10/26 Pages) STMicroelectronics – 20 W + 20 W dual BTL class-D audio amplifier

Characterization curves
Figure 5. THD + N vs output power (without LC filter)
10
5
Vs=18V
Rl=8Ω
2
f=1kHz
1
0.5
0.2
0.1
0.05
0.02
0.01
100m
200m
500m
L CH
R CH
1
2
5
Po (W)
10
20 30
Figure 6. THD + N vs frequency
THD +N (%)
10
5
2
1
0.5
Vs = 18V
Rl = 8 ohm
0.2
Pout =100mW
0.1
0.05
0.02
0.01
20
Pout =1 W
50
100
200
500
1k
2k
Frequency (Hz)
5k
10k 20k
TDA7491HV
Figure 7. Closed-loop gain vs frequency
Ampl (dB)
+2
+1.5
+1
+0.5
-0
-0.5
-1
-1.5
-2
-2.5
-3
-3.5
-4
-4.5
-5
20
Gain =32 dB
Gain =30 dB
Gain =26 dB
Vs = 18V
Rl = 8 ohm
@ f =1kHz, Po =1W
Gain =20 dB
50
100
200
500
1k
2k
5k
10k
20k
50k
Frequency (Hz)
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