Applications information

TDA7492

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Doc ID 14926 Rev 5

6.8

Heatsink requirements

As with most amplifiers, the power dissipated within the device depends primarily on the

supply voltage, the load impedance and the output modulation level.

The maximum estimated power dissipation for the TDA7492 is around 7 W. At 25 °C

ambient a heatsink having Rth =15 °C/W is sufficient for sine-wave testing at maximum

power. A musical program, however, dissipates about 40% less power than this and a

heatsink with Rth = 25 °C/W is thus recommended. Even at the maximum recommended

ambient temperature for consumer applications of 50 °C there is still a clear safety margin

before the maximum junction temperature (150 °C) is reached.