TDA7850A Datasheet, PDF (11/16 Pages) STMicroelectronics – 4 x 50 W MOSFET quad bridge power amplifier plus HSD

TDA7850A
Electrical specifications
Figure 14. Power dissipation & efficiency vs. Figure 15. 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
Figure 16. Power dissipation vs. output power Figure 17. Power dissipation vs. output power
(R_L = 4Ω, audio program simulation)
(R_L = 2Ω, audio program simulation)
30 ^{Ptot (W)}
V_S = 13.2 V
25
R_L = 4 x 4Ω
GAUSSIAN NOISE
20
15
10
5
0
1
2
CLIP START
3
4
P_o (W)
60 ^{Ptot (W)}
55
V_S = 13.2 V
50
R_L = 4 x 2Ω
GAUSSIAN NOISE
45
40
35
30
25
20
15
10
5
5
6
0
2
AC00076
CLIP START
4
6
P_o (W)
8
10
AC00077
Figure 18. ITU R-ARM frequency response,
weighting filter for transient pop
Output attenuation (dB)
10
0
-10
-20
-30
-40
-50
10
100
1000
Hz
10000
100000
AC00343
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