TDA7491MV Datasheet, PDF (13/28 Pages) STMicroelectronics – 25 W mono BTL class-D audio amplifier

TDA7491MV
Characterization curves
Figure 8.
FFT (0 dB)
Test Condition:
Vcc =18V,
RL= 8 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 9. FFT (-60 dB)
Test Condition:
Vcc =18V,
RL= 8 ohm,
Rosc =39kΩ, Cosc =100nF,
f =1kHz,
Gv =30dB,
Po = -60dB (@ 1W =0dB)
Tamb =25℃
Specification Limit:
Typical: > 90dB
for the harmonic frequency
FFT (dB)
+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 10. Closed-loop gain vs frequency
Test Condition :
+0.5
Vcc = 18V,
-0
RL = 8 ohm,
-0.5
Rosc =39kO, Cosc =100nF,
-1
0dB@f=1kHz, Po=1w,
Gv=32dB,
Tamb =25℃
-1.5
d
B
-2
r
-2.5
A
-3
-3.5
-4
-4.5
-5
20
Gain=32dB
Gain=22dB
Gain=26dB
Gain=30dB
Vcc=18V,
Rload=8ohm,
0dB@f=1kHz, Po=1w,
Gv=32dB
50
100
200
500
1k
2k
Hz
TDA7491MV 8ohm Closed-loop gain vs Fre.qat27
5k
10k
20k 30k
Doc ID 14576 Rev 2
13/28