Limiting values, Thermal characteristics, Power dissipation – Philips TDA7053A User Manual
Page 5
1997 Jul 15
5
Philips Semiconductors
Product specification
Stereo BTL audio output amplifier with DC
volume control
TDA7053A
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
THERMAL CHARACTERISTICS
Power dissipation
TDA7053A:
Assume V
P
= 6 V and R
L
= 8
Ω
.
The maximum sine wave dissipation is 2
×
0.9 W = 1.8 W.
The R
th j-a
of the package is 50 K/W therefore T
amb(max)
= 150
−
(50
×
1.8) = 60
°
C.
TDA7053AT:
Assume V
P
= 6 V and R
L
= 16
Ω
.
The maximum sine wave dissipation is 2
×
0.46 W = 0.92 W.
The R
th j-a
of the package is 95 K/W therefore T
amb(max)
= 150
−
(95
×
0.92) = 62.6
°
C.
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
amb
≤
25
°
C
TDA7053A
−
2.5
W
TDA7053AT
−
1.32
W
t
sc
short-circuit time
−
1
hr
V
n
input voltage pins 2, 4, 6 and 8
−
5
V
T
amb
operating ambient temperature
−
40
+85
°
C
T
stg
storage temperature
−
55
+150
°
C
T
vj
virtual junction temperature
−
+150
°
C
SYMBOL
PARAMETER
VALUE
UNIT
R
th j-a
thermal resistance from junction to ambient in free air
TDA7053A
50
K/W
TDA7053AT
95
K/W