July 1994
4
Philips Semiconductors
Product specification
2 x 22 W stereo BTL differential amplifier
with speaker protection and dynamic
TDA1556Q
PINNING
SYMBOL
PIN
DESCRIPTION
IN1A
1
input signal 1A
IN1B
2
input signal 1B
n.c.
3
not connected
DDD
4
dynamic distortion detector
V
p1
5
positive supply voltage 1
OUT1A
6
output signal 1A
GND1
7
power ground 1
OUT1B
8
output signal 1B
n.c.
9
not connected
OUT2A
10
output signal 2A
GND2
11
power ground 2
OUT2B
12
output signal 2B
V
P2
13
positive supply voltage 2
M/SB
14
mute/stand-by switch
LSP
15
loudspeaker protection
IN2A
16
input signal 2B
IN2B
17
input signal 2A
Fig.2 Pin configuration.
handbook, halfpage
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
IN 1A
IN 1B
n.c.
DDD
OUT 1A
GND 1
OUT 1B
n.c.
GND 2
OUT 2B
M/SB
LSP
IN 2A
IN 2B
MLA381 - 1
TDA1556Q
OUT 2A
VP2
V P1
THERMAL RESISTANCE
SYMBOL
PARAMETER
THERMAL
RESISTANCE
R
th j-a
from junction to ambient
in free air
40 K/W
R
th j-c
from junction to case
(see Figs 3 and 4)
1.5 K/W
Fig.3 Thermal resistance.
handbook, halfpage
2.8
K/W
0.1
K/W
2.8
K/W
virtual
junction
output 1
output 2
case
MLA382
