Page 1
INTEGRATED CIRCUITS
DATA SH EET
TDA1556Q
2 x 22 W stereo BTL differential
amplifier with speaker protection
and dynamic distortion detector
Product specification
File under Integrated Circuits, IC01
July 1994
Page 2
Philips Semiconductors Product specification
2 x 22 W stereo BTL differential
amplifier with speaker protection and
TDA1556Q
FEATURES
• Few peripheral components
• High output power
• Low output offset voltage
• Fixed gain
• Loudspeaker protection (with diagnostic facility)
• Differential inputs
• Thermally protected
• Reverse polarity safe
• High energy handling capability at the outputs (V
• Electrostatic discharge protection
• No switch-on/switch-off plop
• Flexible leads
• Low thermal resistance
P
• Dynamic Distortion Detector (DDD)
• High common mode input signal
• Very high CMRR
• Good ripple rejection
• Mute/stand-by switch
• Load dump protection
• Short-circuit safe
GENERAL DESCRIPTION
TDA1556Q is a monolithic integrated class-B output
amplifier containing two 22 Watt amplifiers in a BTL
configuration. The device is contained in a 17-lead
single-in-line (SIL) plastic power package. It has two
differential inputs and is primarily intended for car booster
applications.
QUICK REFERENCE DATA
SYMBOL PARAMETER CONDITION MIN. TYP. MAX. UNIT
V
P
positive supply voltage
operating 6.0 14.4 18 V
non-operating −−30 V
load dump −−45 V
I
ORM
I
P
I
sb
I
sw
input impedance 50 −−kΩ
Z
i
T
vj
P
O
SVRR supply voltage ripple rejection R
V
os
repetitive peak output current −−4A
total quiescent current − 80 − mA
stand-by current − 0.1 100 µA
switch-on current −−60 µA
virtual junction temperature −−150 °C
output power 4 Ω; THD = 10% − 22 − W
= 0 Ω; f = 100 Hz to 10 kHz 48 −−dB
S
DC output offset voltage −−100 mV
α channel separation 40 −−dB
∆G
v
channel unbalance −−1dB
CMRR rejection ratio − 72 − dB
= 0 V)
ORDERING INFORMATION
EXTENDED TYPE NUMBER
PINS PIN POSITION MATERIAL CODE
TDA1556Q
(1)
17 SIL plastic SOT243R
Note
1. SOT243-1; 1996 August 19.
July 1994 2
PACKAGE
Page 3
Philips Semiconductors Product specification
2 x 22 W stereo BTL differential amplifier
with speaker protection and dynamic
handbook, full pagewidth
input 1A
1
mute switch
V
P
513
TDA1556Q
input 1B
DDD
LSP
n.c.
2
4
stand-by
switch
V
15
9
A
x1
VA
mute switch
VA
stand-by
reference
voltage
mute
switch
TDA1556Q
6
8
14
output 1A
output 1B
mute/stand-by
input 2A
input 2B
n.c.
16
17
3
11
powerground
7
mute switch
VA
mute switch
VA
Fig.1 Block diagram.
July 1994 3
10
12
MLA383-2
output 2A
output 2B
Page 4
Philips Semiconductors Product specification
2 x 22 W stereo BTL differential amplifier
with speaker protection and dynamic
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
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
M/SB 14 mute/stand-by switch
LSP 15 loudspeaker protection
IN2A 16 input signal 2B
IN2B 17 input signal 2A
5 positive supply voltage 1
13 positive supply voltage 2
handbook, halfpage
IN 1A
IN 1B
n.c.
DDD
V
P1
OUT 1A
GND 1
OUT 1B
n.c.
OUT 2A
GND 2
OUT 2B
V
M/SB
LSP
P2
1
2
3
4
5
6
7
8
TDA1556Q
9
10
11
12
13
14
15
TDA1556Q
THERMAL RESISTANCE
SYMBOL PARAMETER
R
th j-a
from junction to ambient
in free air
R
th j-c
from junction to case
(see Figs 3 and 4)
THERMAL
RESISTANCE
40 K/W
1.5 K/W
handbook, halfpage
virtual
junction
16
IN 2A
17
IN 2B
MLA381 - 1
Fig.2 Pin configuration.
output 1 output 2
2.8
K/W
0.1
K/W
case
2.8
K/W
MLA382
Fig.3 Thermal resistance.
July 1994 4
Page 5
Philips Semiconductors Product specification
2 x 22 W stereo BTL differential amplifier
with speaker protection and dynamic
TDA1556Q
FUNCTIONAL DESCRIPTION
The TDA1556Q contains two identical amplifiers each with
a fixed gain of 26 dB and differential input stages.
The device can be used for bridge-tied-load applications.
The circuit has the following features:
• low stand-by current (< 100 µA)
• low mute/stand-by switching current (low cost supply
switch)
• mute facility
Loudspeaker protection
Should a short circuit to ground occur, thereby forcing a
DC voltage ≥ 1 V across the loudspeaker, a built-in
protection circuit is activated to limit the DC voltage across
the speaker to ≤ 1 V. The delay time of the protection
circuit can be influenced by the external capacitor
connected to pin 15.
A dynamic distortion detector (DDD) is activated when
clipping occurs at one or both output stages. Its
information may be used to operate a sound processor or
DC volume control to attenuate the input signal, thereby
minimizing the distortion.
LIMITING VALUES
In accordance with the absolute maximum system (IEC 134)
SYMBOL PARAMETER CONDITION MIN. MAX. UNIT
V
P
positive supply voltage
operating − 18 V
non-operating − 30 V
during 50 ms (load
− 45 V
dump protection);
rise time ≥ 2.5 ms
I
OSM
I
ORM
T
stg
T
vj
V
psc
V
pr
P
tot
non-repetitive peak output current − 6A
repetitive peak output current − 4A
storage temperature range −55 +150 °C
virtual junction temperature − +150 °C
AC and DC short-circuit safe voltage − 18 V
energy handling capability at outputs V
= 0 − 200 mJ
P
reverse polarity − 6V
total power dissipation − 60 W
DC CHARACTERISTICS
= 14.4 V; T
V
P
= 25 °C; unless otherwise specified
amb
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
Supply
V
P
I
P
V
O
V
os
positive supply voltage note 1 6.0 14.4 18 V
quiescent current − 80 160 mA
DC output voltage note 2 − 6.9 − V
DC output offset voltage operating −−100 mV
Mute/stand-by
V
ON
switch-on voltage level 8.5 −−V
July 1994 5
Page 6
Philips Semiconductors Product specification
2 x 22 W stereo BTL differential amplifier
with speaker protection and dynamic
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
UTE CONDITION
M
V
mute
V
O
V
os
STANDBY CONDITION
V
sb
I
sb
I
sw
I
PSC
Loudspeaker protection
∆V
6-8, 10-12
t
d
Protection active (∆V
I
15
V
15
Protection inactive (∆V
V
15
Notes to the characteristics
1. The circuit is DC adjusted at VP = 6 to 18 V and AC operating at VP = 8.5 to 18 V
2. At 18 V < VP < 30 V the DC output voltage ≤ VP/2
3. Conditions: V14 = 0 V; short circuit to ground; switch V14 to MUTE or ON condition, rise time at V14= ≥ 10 µs
4. Frequency response externally fixed
5. Ripple rejection measured at the output with a source-impedance of 0 Ω (maximum ripple amplitude of 2 V) and a
frequency between 100 Hz and 10 kHz
6. Mismatching is given by the following equation:
mute voltage 3.3 − 6.4 V
output signal in mute position V
= 1 V; f = 1 kHz −−2mV
I max
DC output offset voltage −−100 mV
stand-by voltage 0 − 2V
DC standby current V14 < 0.5 V −−100 µA
0.5 V ≤ V
≤ 2.0 V −−500 µA
14
switch-on current − 25 60 µA
supply current short-circuit to ground;
− 10 - mA
note 3
DC voltage across R
L
−−1.0 V
delay time − 0.5 − s
or ∆V
4-6
≤1.0 V
7-9
current information − 25 −µA
voltage information 3.6 −−V
and ∆V
6-8
10-12
≤0.1 V)
voltage information −−0.3 V
TDA1556Q
–
Z
Zi∆
Zi∆
i1Zi2
--------------------Z
Z
i3Zi4
--------------------Z
100°°⁄×=
i1
–
100°°⁄×=
i3
7. Noise measured in a bandwidth of 20 Hz to 20 kHz
8. Noise output voltage independent of R
(VI = 0 V)
S
9. Common mode rejection ratio measured at the output with both inputs tied together. V
f = 100 Hz - 10 kHz
July 1994 6
I(RMS)
< 3.5 V;
Page 7
Philips Semiconductors Product specification
2 x 22 W stereo BTL differential amplifier
with speaker protection and dynamic
AC CHARACTERISTICS
= 14.4 V; RL = 4 Ω; f = 1 kHz; T
V
p
SYMBOL PARAMETER CONDITION MIN. TYP. MAX. UNIT
P
O
output power THD = 0.5% 15 17 − W
THD total harmonic distortion P
B power bandwidth THD = 0.5%;
f
l
f
h
G
v
low frequency roll-off −1 dB; note 4 − 25 − Hz
high frequency roll-off −1 dB 20 −−kHz
closed loop voltage gain 25 26 27 dB
SVRR supply voltage ripple rejection note 5
input impedance 100 120 150 kΩ
Z
i
input impedance note 6 − 4 − %
∆Z
i
V
no
noise output voltage ON: Rs = 0 Ω; note 7 − 70 120 µV
α channel separation R
∆G
v
channel unbalance −−1dB
CMRR common mode rejection ratio note 9 64 72 − dB
THD total harmonic distortion I
= 25 °C; unless otherwise specified
amb
THD = 10% 20 22 − W
THD = 0.5%;
= 13.2 V
V
P
THD = 10%;
= 13.2 V
V
P
= 1 W − 0.1 − %
O
= −1 dB; with
P
O
respect to 15 W
ON condition 48 −−dB
MUTE condition 48 −−dB
stand-by condition 80 −−dB
= 10 kΩ;
ON: R
s
note 7
MUTE: R
notes 7 and 8
= 10 kΩ 40 −−dB
s
= 50 µA (peak) − 3.5 − %
DDD
= 10 kΩ;
s
− 12 − W
− 17 − W
− 20 to
15000
− 100 −µV
− 60 −µV
TDA1556Q
− Hz
July 1994 7
Page 8
Philips Semiconductors Product specification
2 x 22 W stereo BTL differential amplifier
with speaker protection and dynamic
TDA1556Q
handbook, full pagewidth
1/2 Rs220 nF
audio
source
1/2 R
1/2 Rs220 nF
s
220 µF
n.c.
n.c.
DDD
414513
1
Z
i1
Z
i2
2
9
3
16
mute/stand-by
TDA1556Q
6
8
V
ref
15
10
V
P
100
nF
R
load
4.7
µF
2200
µF
Z
i3
audio
source
Z
i4
s
220 µF
17
711
1/2 R
Fig.4 Stereo BTL test diagram.
July 1994 8
12
MLA380-2
R
load
Page 9
Philips Semiconductors Product specification
2 x 22 W stereo BTL differential amplifier
with speaker protection and dynamic
PACKAGE OUTLINE
TDA1556Q
DBS17P: plastic DIL-bent-SIL power package; 17 leads (lead length 12 mm)
non-concave
D
d
j
x
E
h
view B: mounting base side
B
SOT243-1
D
h
A
2
E
A
117
e
Z
DIMENSIONS (mm are the original dimensions)
UNIT A e
mm
Note
1. Plastic or metal protrusions of 0.25 mm maximum per side are not included.
OUTLINE
VERSION
SOT243-1
A2bpcD
17.0
4.6
4.2
0.75
0.60
15.5
0.48
0.38
IEC JEDEC EIAJ
1
e
(1)
deD
24.0
20.0
23.6
19.6
w M
b
p
(1)
E
h
12.2
10 2.54
11.8
REFERENCES
0 5 10 mm
scale
1
1.27
e
5.08
L
3
L
E
2
h
6
Q
LL3m
3.4
12.4
3.1
11.0
c
m
2.4
1.6
e
2
Qj
2.1
4.3
1.8
EUROPEAN
PROJECTION
v M
v
0.8
x
0.4w0.03
ISSUE DATE
92-11-17
95-03-11
(1)
Z
2.00
1.45
July 1994 9
Page 10
Philips Semiconductors Product specification
2 x 22 W stereo BTL differential amplifier
with speaker protection and dynamic
TDA1556Q
SOLDERING
Introduction
There is no soldering method that is ideal for all IC
packages. Wave soldering is often preferred when
through-hole and surface mounted components are mixed
on one printed-circuit board. However, wave soldering is
not always suitable for surface mounted ICs, or for
printed-circuits with high population densities. In these
situations reflow soldering is often used.
This text gives a very brief insight to a complex technology.
A more in-depth account of soldering ICs can be found in
“IC Package Databook”
our
Soldering by dipping or by wave
The maximum permissible temperature of the solder is
260 °C; solder at this temperature must not be in contact
with the joint for more than 5 seconds. The total contact
time of successive solder waves must not exceed
5 seconds.
DEFINITIONS
Data sheet status
Objective specification This data sheet contains target or goal specifications for product development.
Preliminary specification This data sheet contains preliminary data; supplementary data may be published later.
Product specification This data sheet contains final product specifications.
(order code 9398 652 90011).
The device may be mounted up to the seating plane, but
the temperature of the plastic body must not exceed the
specified maximum storage temperature (T
printed-circuit board has been pre-heated, forced cooling
may be necessary immediately after soldering to keep the
temperature within the permissible limit.
Repairing soldered joints
Apply a low voltage soldering iron (less than 24 V) to the
lead(s) of the package, below the seating plane or not
more than 2 mm above it. If the temperature of the
soldering iron bit is less than 300 °C it may remain in
contact for up to 10 seconds. If the bit temperature is
between 300 and 400 °C, contact may be up to 5 seconds.
stg max
). If the
Limiting values
Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or
more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation
of the device at these or at any other conditions above those given in the Characteristics sections of the specification
is not implied. Exposure to limiting values for extended periods may affect device reliability.
Application information
Where application information is given, it is advisory and does not form part of the specification.
LIFE SUPPORT APPLICATIONS
These products are not designed for use in life support appliances, devices, or systems where malfunction of these
products can reasonably be expected to result in personal injury. Philips customers using or selling these products for
use in such applications do so at their own risk and agree to fully indemnify Philips for any damages resulting from such
improper use or sale.
July 1994 10
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