TDA7265B Datasheet, PDF (13/18 Pages) STMicroelectronics – 30 W + 30 W stereo amplifier with mute and standby

TDA7265B
Applications
5.2
Application suggestions for stereo configuration
The recommended values of the external components are those shown in the application
circuit of Figure 12. If different values are used, the following table can be helpful.
Table 5.
Recommended values of the external components in the TDA7265B demonstration
board schematic
Recomm.
Component
value
Purpose
Larger than
recommended value
Smaller than
recommended value
R1
R2
R3
R4
R5, R8
R6, R9
R7, R10
C1, C2
C3
C4, C6
C5, C7
C8, C9
Dz
Q1
10 kΩ
15 kΩ
18 kΩ
15 kΩ
18 kΩ
560 Ω
4.7 Ω
1 µF
1 µF
1000 µF
0.1 µF
0.1 µF
5.1 V
BC107
Mute circuit
Increase of Dz biasing current
Mute circuit
Mute circuit
Mute circuit
Closed-loop gain setting⁽¹⁾
V_pin # 5 shifted downward
V_pin # 5 shifted upward
V_pin # 5 shifted upward
Increase of gain
Decrease of gain
V_pin # 5 shifted upward
V_pin # 5 shifted downward
V_pin # 5 shifted downward
Frequency stability
Danger of oscillations
Danger of oscillations
Input DC decoupling
Higher low-frequency cutoff
St-By/Mute time constant Larger on/off time
Smaller on/off time
Supply voltage bypass
Danger of oscillations
Supply voltage bypass
Danger of oscillations
Frequency stability
Mute circuit
Mute circuit
1. Closed-loop gain has to be ≥ 29 dB
Table 6.
Mute, standby truth table
SW1
B
B
A
A
SW2
A
B
A
B
Standby
Standby
Mute
Play
Doc ID 022601 Rev 1
13/18