TDA7491P Datasheet, PDF (16/42 Pages) STMicroelectronics – 2 x 10-watt dual BTL class-D audio amplifier

Characterization curves
TDA7491P
Figure 10. FFT (0 dB)
Test Condition:
Vcc =10V,
RL= 4 ohm,
Rosc = 39kΩ, Cosc =100nF,
f =1kHz,
Gv = 30dB,
Po = 1W
Tamb = 25℃
Specification Limit:
Typical: >60dB
for the harmonic frequency
FFT (dB)
+10
+0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
-120
-130
-140
-150
20
50
100
200
500
1k
2k
Frequency (Hz)
5k
10k 20k
Figure 11. FFT (-60 dB)
FFT (dB)
+0
Test Condition:
-10
-20
Vcc =10V,
-30
RL= 4 ohm,
-40
Rosc = 39kΩ, Cosc = 100nF,
-50
f = 1kHz,
-60
Gv=30dB,
-70
-80
Po= -60dB (@ 1W =0dB)
-90
Tamb=25℃
-100
-110
Specification Limit:
-120
Typical: > 90dB
for the harmonic frequency
-130
-140
-150
20
50
100
200
500
1k
2k
Frequency (Hz)
5k
10k 20k
Figure 12. Power supply rejection ratio vs. frequency
+0
-10
Test Condition:
Vcc =10V,
-20
RL= 4 ohm,
-30
Rosc = 39kΩ, Cosc = 100nF,
Vin=0,
-40
d
Gv=30dB,
B
r
-50
0dB refers to 500mV, 100Hz, A
-60
Tamb=25℃
-70
Ripple frequency=100Hz
Ripple voltage=500mV
-80
-90
- 100
20
50
100
200
500
1k
2k
Hz
4 ohm 10 v PSRR.at27
5k
10k 20k
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Doc ID 13540 Rev 6