Datasheet

Applications information TDA7492P
18/26 Doc ID 15068 Rev 5
6 Applications information
6.1 Mode selection
The three operating modes of the TDA7492P are set by the two inputs STBY (pin 20) and
MUTE (pin 21).
● Standby mode: all circuits are turned off, very low current consumption.
● Mute mode: inputs are connected to ground and the positive and negative PWM
outputs are at 50% duty cycle.
● Play mode: the amplifiers are active.
The protection functions of the TDA7492P are enabled by pulling down the voltages of the
STBY and MUTE inputs shown in Figure 21. The input current of the corresponding pins
must be limited to 200 µA.
Figure 21. Standby and mute circuits
Figure 22. Turn-on/off sequence for minimizing speaker “pop”
Table 6. Mode settings
Mode selection STBY MUTE
Standby L
(1)
1. Drive levels defined in Table 5: Electrical specifications on page 8
X (don’t care)
Mute H
(1)
L
Play H H
TDA7492P
STBY
MUTE
0 V
3.3 V
C7
2.2 µF
R2
30 kΩ
Standby
0 V
3.3 V
C15
2.2 µF
R4
30 kΩ
Mute
VCC
STBY
MUTE
Input
Output
I
q
Standby Mute Play Mute Standby
t
t
t
t
t
t
0
0
0
0
0
0