TDA8191 Datasheet, PDF (4/6 Pages) STMicroelectronics – TV SOUND CHANNEL

TDA8191
TYPICAL APPLICATION
2 70kΩ
VS
470µF
IF
input
0.1µF
560Ω
560Ω
0.1µF
2
4.7µF
18
1
5
TDA 8191
3
0.1µF
4
7
68pF
0 .1µF
8. 2 p F
L1 : Qu = 80e, fo = 5.5MHz.
8
9
10
11
68nF
L1
1µF
1 µF
V11
SW
V9
OUT
V10
IN
6
15
16
17
15kΩ
R1 = 1.8kΩ
470µF
Vo
220nF
19
2.2µF
12
13
14
20 _270Ω
RL
R2
6.6Ω
1. 5kΩ
2.2µF
11k Ω
VC
C1 = 4.7nF
24kΩ
Volume
Figure 2 : Volume Attenuationversus
DC Volume Control Voltage
K Tip (dB)
0
10
20
30
40
50
60
70
80
90
TT = 300°k
12 dB
(30 +/-6 dB)
k+ Noise
VC (V) _k
0
1
2
3
4
5
Figure 4 : Relative Audio Output Voltage and
Output Noise versus Input Signa
Vo (dB)
S+N
N (dB)
0
-2
-4
-6
-8
-10
-12
-14
-16 _{0dB = 4V}
-18
10
10 ²
0
Vo
10
20
30
40
S+N
50
N
60
70
V_i (µV) ₈₀
90
10 ³
10 ⁴
10 ⁵
Figure 3 : Volume Attenuation Thermal Drift
∆K (dB)
30
20
10
0
-10
-20
-30
-40
-50
10
30
TYP at TJ = 380°k
WORST CASE at TJ = 380°k
50
70
°k
90 110
Figure 5 : Distortion versus Output Power
d (%)
10
VS = 12V, RL = 8Ω
8
VS = 24V, RL = 16Ω
6
4
2
0
10^-2
10^-1
1
Pol
(W)
10
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