TDA7492E Datasheet, PDF (13/24 Pages) STMicroelectronics – 79 W + 79 W dual BTL class-D audio amplifier

TDA7492E
Application information
An example of maximum effective control voltage at PLIMIT vs. power supply and load
resistance is shown in Table 11: "Max effective voltage of PLIMIT pin vs. power supply and
load".
Table 11: Max effective voltage of PLIMIT pin vs. power supply and load
Rload
Power supply
7V
13 V
24 V
4Ω
0.71 V
1.32 V
2.44 V
6Ω
0.74 V
1.37 V
2.53 V
8Ω
0.75 V
1.39 V
2.57 V
4.4
Mode selection
The three operating modes of the TDA7492E are set by 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 TDA7492E are implemented by pulling down the voltages of
the STBY and MUTE inputs shown in Figure 5: "Standby and mute circuits". The input
current of the corresponding pins must be limited to 200 µA.
Mode
Standby
Mute
Play
Table 12: Mode settings
STBY
L⁽¹⁾
H
H
MUTE
X (don’t care)
L
H
Notes:
(1)_{Drive levels defined in Table 5: "Electrical specifications".}
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