Philips Semiconductors
6 W hi-fi audio power amplifier
Product specification
TDA2613
Fig.2 Power derating curve.
THERMAL RESISTANCE
From junction to case
Rth j-c = 8 K/W
HEATSINK DESIGN EXAMPLE
With derating of 8 K/W, the value of heatsink thermal resistance is calculated as follows:
given RL = 8 Ω 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:
Rth h-a = -1---5---40---,--1–-----6---0-- – 8 ≈ 14 K/W
Note: The metal tab (heatsink) has the same potential as pin 5 (GND).
July 1994
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