NXP Semiconductors
Product specification
2 W BTL audio amplifier
FEATURES
•
Flexibility in use
•
Few external components
•
Low saturation voltage of output stage
•
Gain can be fixed with external resistors
•
Standby mode controlled by CMOS compatible levels
•
Low standby current
•
No switch-on/switch-off plops
•
High supply voltage ripple rejection
•
Protected against electrostatic discharge
•
Outputs short-circuit safe to ground, V
CC
and across
the load
•
Thermally protected.
QUICK REFERENCE DATA
SYMBOL
V
CC
I
q
I
stb
P
o
PARAMETER
supply voltage
quiescent current
standby current
output power
THD = 10%
R
L
= 8
Ω;
V
CC
= 5 V
R
L
= 8
Ω;
V
CC
= 7.5 V
R
L
= 16
Ω;
V
CC
= 9 V
THD
SVRR
total harmonic distortion
supply voltage ripple rejection
P
o
= 0.5 W
1
−
−
−
50
1.2
2.2
2.0
0.15
−
V
CC
= 5 V
CONDITIONS
MIN.
2.2
−
−
TYP.
5
8
−
APPLICATIONS
•
Portable consumer products
•
Personal computers
•
Telephony.
GENERAL DESCRIPTION
TDA8543
The TDA8543(T) is a one channel audio power amplifier
for an output power of 2 W with an 8
Ω
load at a 7.5 V
supply. The circuit contains a BTL amplifier with
a complementary PNP-NPN output stage and
standby/mute logic. The TDA8543T comes in a 16 pin
SO package and the TDA8543 in a 16 pin DIP package.
MAX.
18
12
10
−
−
−
−
−
UNIT
V
mA
μA
W
W
W
%
dB
ORDERING INFORMATION
TYPE
NUMBER
TDA8543T
TDA8543
PACKAGE
NAME
SO16
DIP16
DESCRIPTION
plastic small outline package; 16 leads; body width 3.9 mm
plastic dual in-line package; 16 leads (300 mil); long body
VERSION
SOT109-1
SOT38-1
1997 Jun 12
2
NXP Semiconductors
Product specification
2 W BTL audio amplifier
BLOCK DIAGRAM
TDA8543
handbook, halfpage
−
IN−
IN+
VCC
6
5
12
TDA8543
11
OUT−
−
+
R
R
20 kΩ
4
20 kΩ
3
−
−
+
14
OUT+
SVR
MODE
STANDBY/MUTE LOGIC
13
GND
MGK402
Fig.1 Block diagram.
PINNING
SYMBOL
n.c.
n.c.
MODE
SVR
IN+
IN−
n.c.
n.c.
n.c.
n.c.
OUT−
V
CC
GND
OUT+
n.c.
n.c.
1997 Jun 12
PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
DESCRIPTION
not connected
not connected
operating mode select (standby,
mute, operating)
half supply voltage, decoupling
ripple rejection
positive input
negative input
not connected
not connected
not connected
not connected
negative loudspeaker terminal
supply voltage
ground
positive loudspeaker terminal
not connected
not connected
3
Fig.2 Pin configuration.
IN+ 5
IN− 6
n.c. 7
n.c. 8
MGK401
handbook, halfpage
n.c. 1
n.c. 2
MODE 3
SVR 4
16 n.c.
15 n.c
14 OUT+
13 GND
TDA8543
12 VCC
11 OUT−
10 n.c.
9
n.c
NXP Semiconductors
Product specification
2 W BTL audio amplifier
FUNCTIONAL DESCRIPTION
The TDA8543(T) is a BTL audio power amplifier capable
of delivering an output power between 1 and 2 W,
depending on supply voltage, load resistance
and package. Using the MODE pin the device can
be switched to standby and mute condition. The device
is protected by an internal thermal shutdown protection
mechanism.
The gain can be set within a range from 6 dB to 30 dB
by external feedback resistors.
Power amplifier
The power amplifier is a Bridge Tied Load (BTL) amplifier
with a complementary PNP-NPN output stage.
TDA8543
The voltage loss on the positive supply line is
the saturation voltage of a PNP power transistor,
on the negative side the saturation voltage of an
NPN power transistor.
Mode select pin
The device is in standby mode (with a very low current
consumption) if the voltage at the MODE
pin is >(V
CC
−
0.5 V), or if this pin is floating. At a MODE
voltage level of less than 0.5 V the amplifier is fully
operational.
In the range between 1.5 V and V
CC
−
1.5 V the amplifier
is in mute condition. The mute condition is useful to
suppress plop noise at the output, caused by charging of
the input capacitor.
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
SYMBOL
V
CC
V
I
I
ORM
T
stg
T
amb
V
psc
P
tot
input voltage
repetitive peak output current
storage temperature
operating ambient temperature
AC and DC short-circuit safe voltage
total power dissipation
SO16
DIP16
QUALITY SPECIFICATION
In accordance with
“SNW-FQ-611-E”.
The number of the quality specification can be found in the
“Quality Reference
Handbook”.
The handbook can be ordered using the code 9397 750 00192.
THERMAL CHARACTERISTICS
SYMBOL
R
th j-a
PARAMETER
thermal resistance from junction to ambient
TDA8543T (SO16)
TDA8543 (DIP16)
CONDITIONS
in free air
100
55
K/W
K/W
VALUE
UNIT
non-operating
PARAMETER
supply voltage
CONDITIONS
operating
MIN.
−0.3
−0.3
−
−55
−40
−
−
−
MAX.
+18
V
CC
+ 0.3
1
+150
+85
10
1.2
2.2
V
V
A
°C
°C
V
W
W
UNIT
1997 Jun 12
4
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