Electrical specifications
TDA7850
Figure 12. Distortion vs. frequency
Figure 13. Crosstalk vs. frequency
(R = 2Ω)
L
CROSSTALK (dB)
-20
THD (%)
10
1
-30
-40
-50
-60
-70
-80
-90
-100
RL = 4Ω
o = 4 W
Rg = 600Ω
VS = 14.4 V
L = 2Ω
o = 8 W
P
R
P
0.1
0.01
0.001
10
100
1000
f (Hz)
10000
100000
10
100
1000
f (Hz)
10000
100000
AC00070
AC00071
Figure 14. Supply voltage rejection vs.
frequency
Figure 15. Output attenuation vs. supply
voltage
SVR (dB)
-20
OUTPUT ATTN (dB)
0
R
= 600Ω
g
-30
-40
-50
-60
-70
-80
-90
-100
RL = 4Ω
Vripple = 1 Vrms
P
o = 4 W ref
-20
-40
-60
-80
-100
10
100
1000
f (Hz)
10000
100000
5
6
7
8
9
10
AC00072
AC00073
Vs (V)
Figure 16. Power dissipation & efficiency vs. Figure 17. Power dissipation & efficiency vs.
output power (R = 4Ω, SINE)
output power (R = 2Ω, SINE)
L
L
(%)
Ptot (W)
(%)
η
η
Ptot (W)
90
80
70
60
50
40
30
20
10
0
180
160
140
120
100
80
90
80
70
60
50
40
30
20
10
0
90
80
70
η
VS = 14.4 V
L = 4 x 4Ω
f = 1 KHz SINE
VS = 14.4 V
RL = 4 x 2Ω
f = 1 KHz SINE
η
R
60
50
40
30
20
Ptot
Ptot
60
40
20
10
0
0
0
2
4
6
8
10 12 14 16 18 20 22 24 26 28 30
0
5
10
15
20
25
30
35
40
45
50
55
AC00074
Po (W)
AC00075
Po (W)
12/18
STMICROELECTRONICS [ ST ]
