TDA7492MV 查看數據表（PDF） - STMicroelectronics

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TDA7492MV

50 W mono BTL class-D audio amplifier

STMicroelectronics 

Applications information

TDA7492MV

6.2

Mode selection

The three operating modes of the TDA7492MV are set by the two inputs STBY (pin 20) and

MUTE (pin 21).

z Standby mode: all circuits are turned off, very low current consumption.

z Mute mode: inputs are connected to ground and the positive and negative PWM

outputs are at 50% duty cycle.

z Play mode: the amplifiers are active.

The protection functions of the TDA7492MV are realized by pulling down the voltages of the

STBY and MUTE inputs shown in Figure 22. The input current of the corresponding pins

must be limited to 200 µA.

Table 7. Mode settings

Mode Selection

Standby

Mute

L (1)

H (1)

STBY

Play

H

1. Drive levels defined in Table 5: Electrical specifications on page 8

Figure 22. Standby and mute circuits

MUTE

X (don’t care)

L

H

Standby

3.3 V

0V

Mute

3.3 V

0V

R2

30 kΩ

R4

30 kΩ

C7

2.2 µF

C15

2.2 µF

STBY

TDA7492MV

MUTE

Figure 23. Turn-on/off sequence for minimizing speaker “pop”

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Doc ID 16264 Rev 1

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