TDA7492 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'TDA7492' PDF : 32 Pages View PDF
TDA7492
6
Applications information
Applications information
6.1
Mode selection
The three operating modes of the TDA7492 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 TDA7492 are enabled by pulling down the voltages of the
STBY and MUTE inputs shown in Figure 29. The input current of the corresponding pins
must be limited to 200 μA.
Table 6. Mode settings
Standby
Mute
Mode
L (1)
H (1)
STBY
MUTE
X (don’t care)
L
Play
H
H
1. Drive levels defined in Table 5: Electrical specifications on page 9
Figure 29. Standby and mute circuits
Standby
3.3 V
0V
Mute
3.3 V
0V
R2
30 k
R4
30 k
C7
2.2 μF
C15
2.2 μF
STBY
TDA7492
MUTE
Figure 30. Turn on/off sequence for minimizing speaker “pop”
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