tda8542at-n1 NXP Semiconductors, tda8542at-n1 Datasheet - Page 5

• Manufacturer Part Number: tda8542at-n1
• Description: 2 X 1.5 W Btl Audio Amplifier
• Manufacturer: NXP Semiconductors

Philips Semiconductors
FUNCTIONAL DESCRIPTION
The TDA8542AT is a 2
capable of delivering 2
load at THD = 10% using a 6 V power supply. 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 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.
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 a NPN power
transistor. The total voltage loss is <1 V and with a 6 V
supply voltage and an 8
1.5 W can be delivered.
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
QUALITY SPECIFICATION
In accordance with “SNW-FQ-611-E” .
THERMAL CHARACTERISTICS
1998 Mar 25
V
V
I
T
T
V
P
R
ORM
SYMBOL
SYMBOL
stg
amb
CC
I
sc
tot
th(j-a)
2
1.5 W BTL audio amplifier
supply voltage
input voltage
repetitive peak output current
storage temperature
operating ambient temperature
AC and DC short-circuit safe voltage
total power dissipation
thermal resistance from junction to ambient
1.5 W BTL audio power amplifier
1.5 W output power to an 8
loudspeaker an output power of
PARAMETER
PARAMETER
operating
non-operating
5
CONDITIONS
Mode select pin
The device is in the standby mode (with a very low current
consumption) if the voltage at the MODE pin is
>(V
level of less than 0.5 V the amplifier is fully operational.
In the range between 1.5 V and V
is in mute condition. The mute condition is useful to
suppress plop noise at the output caused by charging of
the input capacitor.
Headphone connection
A headphone can be connected to the amplifier using two
coupling capacitors for each channel. The common GND
pin of the headphone is connected to the ground of the
amplifier (see Fig.14). In this case the BTL/SE pin must be
either on a logic HIGH level or not connected at all.
The two coupling capacitors can be omitted if it is allowed
to connect the common GND pin of the headphone jack
not to ground, but to a voltage level of
In this case the BTL/SE pin must be either on a logic LOW
level or connected to ground. If the BTL/SE pin is on a
LOW level, the power amplifier for the positive
loudspeaker terminal is always in mute condition.
CC
in free air
0.5 V), or if this pin is floating. At a MODE voltage
CONDITIONS
0.3
0.3
55
40
MIN.
+18
V
1
+150
+85
10
2.2
CC
CC
VALUE
MAX.
Product specification
TDA8542AT
60
+ 0.3
1
1.5 V the amplifier
2
V
CC
(see Fig.14).
V
V
A
V
W
C
C
UNIT
UNIT
K/W