July 1994

5

Philips Semiconductors

Product specification

2 x 6 W hi-fi audio power amplifier

TDA1521A

THERMAL RESISTANCE

HEATSINK DESIGN EXAMPLE

With derating of 6 K/W, the value of heatsink thermal resistance is calculated as follows:

of 60

°C, the required thermal resistance of the heatsink is

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

From junction to case

Fig.2 Power derating curve.

R

th h-a

150

60

–

78

,

----------------------

6

5,5 K/W

=

–

=