Philips TDA2613

July 1994 5

Philips Semiconductors Product speciﬁcation

6 W hi-ﬁ audio power ampliﬁer TDA2613

THERMAL RESISTANCE

HEATSINK DESIGN EXAMPLE

With derating of 8 K/W, the value of heatsink thermal resistance is calculated as follows:

given RL = 8Ω and VP = 24 V, the measured maximum dissipation is 4,1 W; then, for a maximum ambient temperature

of 60 °C, the required thermal resistance of the heatsink is:

Note: The metal tab (heatsink) has the same potential as pin 5 (GND).

From junction to case Rth j-c= 8 K/W

Fig.2 Power derating curve.

Rthh-a 150 60–

41,

---------------------- 814K/W≈–=