Philips Semiconductors
Product specification
2 to 6 W audio power amplifier
TDA1011
RATINGS
Limiting values in accordance with the Absolute Maximum System (IEC 134)
Supply voltage
V
max.
max.
24 V
3 A
P
Peak output current
I
OM
Total power dissipation
Storage temperature
see derating curve Fig.2
T
T
−55 to + 150 °C
−25 to + 150 °C
stg
Operating ambient temperature
A.C. short-circuit duration of load
amb
during sine-wave drive; V = 12 V
t
max.
100 hours
P
sc
Fig.2 Power derating curve.
HEATSINK DESIGN
Assume V = 12 V; R = 4 Ω; T
= 60 °C maximum; P = 3,8 W.
o
P
L
amb
The maximum sine-wave dissipation is 1,8 W.
The derating of 10 K/W of the package requires the following external heatsink (for sine-wave drive):
150 – 60
R
= R
+ R
+ R =
th h-a
= 50 K/W.
----------------------
th j-a
th j-tab
th tab-h
1, 8
= 1 K/W, R = 50 − (10 + 1) = 39 K/W.
th h-a
Since R
= 10 K/W and R
th j-tab
th tab-h
November 1982
4
NXP [ NXP ]
