Philips TDA7057AQ - Manual (Page 5)

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
= 16
Ω
. 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
−
1 hr
V
n
input voltage pins 1, 3, 5 and 7
−
5 V
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