Operation

AN4171

4/14

Doc ID 023710 Rev 1

Figure 2.

Demonstration board connections

1.4

Powering up

Before powering up the demonstration board, ensure that the TDA7491MV is in standby and

mute conditions and the gain is set to the desired value (default 20 dB). Verify also the

dedicated switches and jumpers.

Figure 3.

Standby and mute switches

STBY

MUTE

Analog

Input

Dummy

load

GND

Vcc

Table 2.

Standby and mute settings

STBY (S1)

MUTE (S2)

Status

L

L

STBY

L

H

STBY

HL

MUTE

HH

PLAY

L

L

H

H

S1= STBY

S2= MUTE