TDA7491HV Просмотр технического описания (PDF) - STMicroelectronics

Номер в каталоге

Компоненты Описание

производитель

TDA7491HV

20 W + 20 W dual BTL class-D audio amplifier

STMicroelectronics 

Application information

7

Application information

TDA7491HV

7.1

Mode selection

The three operating modes of the TDA7491HV 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 TDA7491HV are realized by pulling down the voltages of the

STBY and MUTE inputs shown in Figure 23. The input current of the corresponding pins

must be limited to 200 µA.

Table 6. Mode settings

Mode Selection

Standby

Mute

L (1)

H (1)

STBY

Play

H

1. Drive levels defined in Table 5: Electrical specifications on page 7.

Figure 23. STBY and MUTE circuit

MUTE

X (don’t care)

L

H

TDA7491HV

Figure 24. Turn on/off sequence for minimizing speaker “pop”

18/26

Share Link: