Philips Semiconductors
50 W high performance hi-fi amplifier
Product specification
TDA1514A
The theoretical maximum power dissipation for Po = 40 W with a stabilized power supply is:
2----Vπ----2P---2R----L- = 19 W; where VP = ± 27.5 V; RL = 8 Ω
Considering, for example, a maximum ambient temperature of 50 °C and a maximum junction temperature of 150 °C the
total thermal resistance is:
Rth j-a = 1----5---0--1---9–-----5---0-- = 5.3 K/W
Since the thermal resistance of the SOT131A encapsulation is Rth j-mb < 1 K/W, the thermal resistance required of the
heatsink is Rth h-a < 4.3 K/W.
SAFE OPERATING AREA (SOAR) PROTECTION
May 1992
Fig.3 SOAR protection curve.
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