TDA7492E

Application information

DocID027638 Rev 1

11/24

4

Application information

4.1

Gain setting

The four gain settings of the TDA7492E are set by GAIN (pin 31). Internally, gain is set by

changing the feedback resistors of the amplifier.

Table 8: Gain settings

Voltage on GAIN pin

Total gain

Application recommendations

20.8 dB

GAIN pin connected to SGND

26.8 dB

External resistor divider <100 k

30 dB

External resistor divider <100 k

32.8 dB

GAIN pin connected to VDDS

4.2

Stereo and mono applications

The TDA7492E can be used in stereo BTL or in mono BTL configuration. When the input

pins, INPB and INNB of the right channel are directly shorted to VDDS (without input

capacitors) the device is in mono configuration as shown in Figure 3: "Mono BTL settings".

Figure 3: Mono BTL settings

4.3

Smart protections

4.3.1

Overcurrent protection (OCP)

If the overcurrent protection threshold is reached, the power stage will be shut down

immediately. The device will recover automatically when the fault is removed.

The overcurrent protection scheme is shown in Table 9: "Overcurrent protection". Two

typical thresholds are as follows.

Table 9: Overcurrent protection

I (Shutdown)

High side (A)

11.2

Low side (A)

10.0

INPA

INNA

INPB

INNB

OUTNB

OUTNA

OUTPA

OUTPB

IC

LC

Filter