TDA7263M Datasheet, PDF (5/7 Pages) STMicroelectronics – 12+12W STEREO AMPLIFIER WITH MUTING

TDA7263M
APPLICATION SUGGESTION
The recommended values of the components are those shown on application circuit of figure 1. Different
values can be used; the following table can help the designer.
Component
R1 and R3
R2 and R4
R5 and R6
C1 and C2
C3
C4
C5
C6 and C7
C8 and C9
C10 and C11
Recomm.
Value
1.5KΩ
47Ω
4.7Ω
100nF
47µF
100nF
1000µF
47µF
0.1µF
1000µF
Purpose
Close loop gain setting (*)
Close loop gain setting (*)
Frequency stability
Input DC decoupling
- Ripple Rejection
- Mute time constant
Supply Voltage Bypass
Supply Voltage Bypass
Feedback input DC
decoupling
Frequency stability
Output DC decoupling
Larger Than
Increase of gain
Decrease of gain
Danger of oscillations
Higher SVR
Increase of the Switch-on
time
Increase of the Switch-on
time
Smaller Than
Decrease of gain
Increase of gain
Higher low frequency cutoff
- Degradation of SVR
- Worse turn-off pop by muting
Danger of oscillations
Decrease of the Switch-on
time
Danger of oscillations
Higher low-frequency cut-off
(*) Closed loop gain must be higher than 26dB
Figure 8: P. C. Board and Component Layout of the Application Circuit (1:1 scale).
BUILT-IN PROTECTION SYSTEMS
THERMAL SHUT-DOWN
The presence of a thermal limiting circuit offers
the following advantages:
1-an overload on the output (even if it is perma-
nent), or an excessive ambient temperature
can be easily withstood.
2-the heatsink can have a smaller factor of
safety compared with that of a conventional
circuit. There is no device damage in the case
of excessive junction temperature; all that
happens is that P_O (and therefore P_tot) and I_O
are reduced.
SHORT CIRCUIT (AC CONDITIONS)
The TDA7263M can withstand accidental short
circuits across the speaker made by a wrong con-
nection during normal play operation.
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