TDA7454
Figure 10: Muting Attenuationvs. Vpin 22
Figure 9: THD vs. Output Power
OUT ATTN
THD(%)
10
100
90
80
70
60
50
40
30
20
10
0
RL= 2 Ohm
Po= 4 W
f= 20 to 20,000 Hz
HI-EFFMODE
1
f = 10KHz
0.1
0
f = 1KHz
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
0
1
10
Vpin22 (V)
Po(W)
Figure 11: THD vs. Frequency
Figure 12: SupplyVoltage Rejection vs. Fre-
quency
SVR (dB)
THD (%)
10
100
90
Vripple= 1 Vrms
RL = 4 Ohm
Po = 1 W
HI-EFF MODE
80
Rg= 0
1
70
60
50
40
30
20
0.1
0
10
100
1000
f (Hz)
10000
10
100
1000
10000
f (Hz)
Figure 13: Cross-Talk vs. Frequency
Figure 14: PowerDissipation and Efficiency vs.
Output Power
CROSSTALK (dB)
90
Ptot (W)
n (%)
70
65
60
55
50
45
40
35
30
25
20
15
10
5
70
60
50
40
30
20
10
0
Vs= 14.4 V
RL = 4 x 4 Ohm
f = 1 KHz
80
Po = 4 W
70
60
50
40
30
20
RL = 4 Ohm
Rg = 0
HI-EFF MODE
HI-EFF MODE
n
Ptot
0
0.1
1
10
10
100
1000
10000
f (Hz)
Po (W)
7/13
STMICROELECTRONICS [ ST ]
