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).
SYMBOL
PARAMETER
supply voltage
CONDITIONS
MIN.
MAX.
18
UNIT
VP
−
−
−
−
V
IORM
IOSM
Ptot
Tamb
Tstg
Tvj
repetitive peak output current
non-repetitive peak output current
total power dissipation
1.25
1.5
22.5
+85
+150
150
1
A
A
Tcase < 60 °C
W
operating ambient temperature
storage temperature
−40
−55
−
°C
°C
°C
hr
virtual junction temperature
short-circuit time
tsc
−
Vn
input voltage pins 1, 3, 5 and 7
−
5
V
THERMAL CHARACTERISTICS
SYMBOL
PARAMETER
VALUE
UNIT
K/W
K/W
Rth j-c
Rth j-a
thermal resistance from junction to case
thermal resistance from junction to ambient in free air
4
40
Power dissipation
Assume VP = 12 V and RL = 16 Ω. The maximum sine wave dissipation is 2 × 1.8 W = 3.6 W.
At Tamb(max) = 60 °C:
Rth tot = (150 − 60)/3.6 = 25 K/W.
Rth tot = Rth j-c + Rth c-hs + Rth hs
.
Rth c-hs + Rth hs = 25 − 4 = 21 K/W.
1998 Apr 07
5
ETC [ ETC ]
