TDA2003A
Application information
3.2.3
Application recommendations
The recommended component values are those shown in the application circuit in
Figure 20. Different values can be used. The following table is intended to aid the car-radio
designer.
Table 5.
Recommended values of the components of a bridge application circuit
Recommended
value
Larger than
recommended value
Smaller than
recommended value C1
Component
Purpose
C1
C2
C3
C4
2.2 µF
470 µF
0.1 µF
Input DC decoupling
Ripple rejection
-
-
-
-
Noise at switch-on, switch-off
Degradation of SVR
Supply bypassing
Danger of oscillation
1000 µF
Output coupling to load
Higher low frequency cutoff
Danger of oscillation at high
frequencies with inductive
loads
C5
CX
0.1 µF
Frequency stability
-
1
-------------------
≅
Upper frequency cutoff
Setting of gain
Lower bandwidth
-
Larger bandwidth
2πBR1
R1
R2
(Gv-1). R2
Increase of drain current
-
2.2 Ω
Setting of gain and SVR Degradation of SVR
Danger of oscillation
R3
Rx
1 Ω
Frequency stability
at high frequencies
with inductive loads
-
Poor high frequency
attenuation
≅ 20 R2
Upper frequency cutoff
Danger of oscillation
Doc ID 018796 Rev 4
15/19
STMICROELECTRONICS [ ST ]
