Application information

TDA7492PE

10/24

DocID027029 Rev 1

The thresholds in MUTE Mode are reduced to about 1/2 and two typical thresholds are as

follows.

4.3.2

Thermal protection

When internal die temperature exceeds 140°C, the device enters into Mute by pulling MUTE

pin low firstly.

When internal die temperature exceeds 150°C, the device directly shuts down the power

stage. The TDA7492PE automatically recovers when the temperature become lower than

the threshold.

4.3.3

Power limit

A built-in power limit is used to limit the output voltage level below the supply rail by limiting

the duty cycle. The limit level is set through the voltage at the PLIMIT (pin.30). The pin

voltage is set by the following equation:

Equation 1

VPILIMT = VDDS = [(Rdn//400k) / (Rdn//400 k + Rup)]

Figure 4. Suggested power limit pin connections

Table 9. Overcurrent protection

I (Shutdown)

High side (A)

11.2

Low side (A)

10.0

Table 10. Overcurrent protection (mute mode)

I (Shutdown)

High side (A)

6.2

Low side (A)

5.9