TDA7850 Datasheet, PDF (12/18 Pages) STMicroelectronics – 4 x 50 W MOSFET quad bridge power amplifier plus HSD

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