Philips TDA7057AQ - Limiting Values; Thermal Characteristics; Power Dissipation

1998 Apr 07 5
Philips Semiconductors Product specification
2 × 8 W stereo BTL audio output amplifier
with DC volume control
TDA7057AQ
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
THERMAL CHARACTERISTICS
Power dissipation
Assume V
P
= 12 V and R
L
=16Ω. The maximum sine wave dissipation is 2 × 1.8 W = 3.6 W.
At T
amb(max)
=60°C:
R
th tot
= (150 − 60)/3.6 = 25 K/W.
R
th tot
=R
th j-c
+R
th c-hs
+R
th hs
.
R
th c-hs
+R
th hs
=25−4 = 21 K/W.
SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT
V
P
supply voltage − 18 V
I
ORM
repetitive peak output current − 1.25 A
I
OSM
non-repetitive peak output current − 1.5 A
P
tot
total power dissipation T
case
<60°C − 22.5 W
T
amb
operating ambient temperature −40 +85 °C
T
stg
storage temperature −55 +150 °C
T
vj
virtual junction temperature − 150 °C
t
sc
short-circuit time − 1hr
V
n
input voltage pins 1, 3, 5 and 7 − 5V
SYMBOL PARAMETER VALUE UNIT
R
th j-c
thermal resistance from junction to case 4 K/W
R
th j-a
thermal resistance from junction to ambient in free air 40 K/W