TDA7490 查看數據表（PDF） - STMicroelectronics
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TDA7490 Datasheet PDF : 9 Pages
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TDA7490
Figure 4. Distortion vs. Output Power
Figure 5. Distortion vs. Output Power
THD
(%)
5
Stereo
VS ± 21V; Rl=8Ω;
2
f=1KHz
1
0.5
D99AU1088
0.2
0.1
0.05
0.02
0.01
0 2 4 6 8 10 12 14 16 18 20 22 24 PO(W)
Figure 6. Crosstalk vs. Frequency
THD
(%)
5
Stereo
VS ± 16V; Rl=4Ω;
2
f=1KHz
1
0.5
D99AU1089
0.2
0.1
0.05
0.02
0.01
0 2 4 6 8 10 12 14 16 18 20 22 24 PO(W)
Figure 7. Frequency Response
CT
(dB)
VS ± 21V;
-20
Rl=8Ω;
0dB=1W
-30
-40
-50
-60
-70
-80
D99AU1090
AMP
(dB)
2
0
-2
-4
-6
-8
-10
VS ± 21V;
Rl=8Ω;
0dB=1W
-90
-12
-100
-14
0.001
0.01
0.1
1
f(KHz)
0.01
0.1
1
D99AU1091
10
f(KHz)
Figure 8. Power Dissipation vs. Output Power
Power Dissipation (W)
8
7.5
7
6.5
6
Vs= +/- 21 V; Rl = 8 Ohm; f= 1 KHz
5.5
5
4.5
4
3.5
3
2.5
2
1.5
1
0.5
0
0 2 4 6 8 10 12 14 16 18 20 22 24 26
Output Power (W)
Figure 9. Distortion vs Output Power in BTL
THD
(%)
5
2
1
0.5
0.2
0.1
0.05
0.02
0.01
0
Bridge
VS ± 17V;
Rl=8Ω;
f=1KHz
D99AU1082
5 10 15 20 25 30 35 40 45 50 PO(W)
6/9
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