TDA8542.PDF

(150 KB) Pobierz
11038078 UNPDF
INTEGRATED CIRCUITS
DATA SHEET
TDA8542
2
1 W BTL audio amplifier
Preliminary specification
Supersedes data of 1996 May 06
File under Integrated Circuits, IC01
1997 Feb 19
´
11038078.035.png
Philips Semiconductors
Preliminary specification
2
´
1 W BTL audio amplifier
TDA8542
FEATURES
GENERAL DESCRIPTION
·
Flexibility in use
The TDA8542(T) is a two channel audio power amplifier
for an output power of 2
·
Few external components
load at a 5 V
supply. The circuit contains two BTL amplifiers with a
complementary PNP-NPN output stage and standby/mute
logic. The TDA8542T comes in a 16 pin SO package and
the TDA8542 in a 16 pin DIP package.
´
1 W with an 8
W
·
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
APPLICATIONS
·
High supply voltage ripple rejection
·
Portable consumer products
·
Protected against electrostatic discharge
·
Personal computers
·
Outputs short-circuit safe to ground, V CC and across the
load
·
Motor-driver (servo).
·
Thermally protected.
QUICK REFERENCE DATA
SYMBOL
PARAMETER
CONDITIONS
MIN. TYP. MAX. UNIT
V CC
supply voltage
2.2
5
18
V
I q
quiescent current
V CC =5V
-
15
22
mA
I stb
standby current
-
-
10
m
A
P o
output power
THD = 10%; R L =8
W
; V CC =5V 1
-
-
W
THD
total harmonic distortion
P o = 0.5 W
-
0.15
-
%
SVRR
supply voltage ripple rejection
50
-
-
dB
ORDERING INFORMATION
TYPE
NUMBER
PACKAGE
NAME
DESCRIPTION
VERSION
TDA8542T
SO16L plastic small outline package; 16 leads; body width 7.5 mm
SOT162-1
TDA8541
DIP16 plastic dual in-line package; 16 leads (300 mil); long body
SOT38-1
1997 Feb 19
2
11038078.036.png
Philips Semiconductors
Preliminary specification
2
´
1 W BTL audio amplifier
TDA8542
BLOCK DIAGRAM
handbook, full pagewidth
V CCL V CCR
16
9
-
INL
14
13
-
-
+
15
OUTL -
+
R
V CCL
R
20 k W
-
-
+
2
OUTL +
20 k
W
STANDBY/MUTE LOGIC
-
-
+
TDA8542
INR -
INR
11
12
10
OUTR -
+
R
V CCR
R
20 k W
-
-
+
7
OUTR
+
4
SVR
20 k
W
MODE
3
5
STANDBY/MUTE LOGIC
BTL/SE
18
MGB975
LGND RGND
Fig.1 Block diagram.
1997 Feb 19
3
INL
11038078.037.png 11038078.038.png 11038078.001.png 11038078.002.png 11038078.003.png 11038078.004.png 11038078.005.png 11038078.006.png 11038078.007.png 11038078.008.png 11038078.009.png 11038078.010.png 11038078.011.png 11038078.012.png 11038078.013.png 11038078.014.png 11038078.015.png
Philips Semiconductors
Preliminary specification
2
´
1 W BTL audio amplifier
TDA8542
PINNING
SYMBOL
PIN
DESCRIPTION
LGND
1 ground, left channel
OUTL+
2 positive loudspeaker terminal,
left channel
handbook, halfpage
LGND
1
16
V CCL
MODE
3 operating mode select (standby,
mute, operating)
OUTL
+
2
15
OUTL
-
MODE
3
14
INL
-
SVR
4 half supply voltage, decoupling
ripple rejection
SVR
4
13
INL
+
TDA8542
BTL/SE
5 BTL loudspeaker or SE
headphone operation
BTL/SE
5
12
INR
+
n.c.
6
11
INR
-
n.c.
6 not connected
OUTR
+
7
10
OUTR
-
OUTR+
7 positive loudspeaker terminal,
right channel
RGND
8
9
V CCR
RGND
8 ground, right channel
MGB974
V CCR
9 supply voltage, right channel
OUTR
-
10 negative loudspeaker terminal,
right channel
Fig.2 Pin configuration.
INR
-
11 negative input, right channel
INR+
12 positive input, right channel
FUNCTIONAL DESCRIPTION
INL+
13 positive input, left channel
INL -
14 negative input, left channel
The TDA8542(T) is a 2 ´ 1 W BTL audio power amplifier
capable of delivering 2
OUTL
-
15 negative loudspeaker terminal,
left channel
load
at THD = 10% using a 5 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 dB to 30 dB by external feedback
resistors.
´
1 W output power to an 8
W
V CCL
16 supply voltage, left channel
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 5 V
supply voltage and an 8
W
loudspeaker an output power of
1 W can be delivered.
Mode select pin
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
1997 Feb 19
4
The device is in the standby mode (with a very low current
consumption) if the voltage at the MODE pin is
>(V CC -
11038078.016.png 11038078.017.png 11038078.018.png 11038078.019.png 11038078.020.png 11038078.021.png 11038078.022.png 11038078.023.png 11038078.024.png 11038078.025.png 11038078.026.png 11038078.027.png 11038078.028.png 11038078.029.png 11038078.030.png 11038078.031.png 11038078.032.png
Philips Semiconductors
Preliminary specification
2
´
1 W BTL audio amplifier
TDA8542
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.13). 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 1
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
SYMBOL
PARAMETER
CONDITIONS
MIN.
MAX.
UNIT
V CC
supply voltage
operating
-
0.3
18
V
V I
input voltage
- 0.3
V CC + 0.3 V
I ORM
repetitive peak output current
-
1
A
T stg
storage temperature
non-operating
-
55
150
C
T amb
operating ambient temperature
-
40
85
C
V psc
AC and DC short-circuit safe voltage
-
10
V
P tot
total power dissipation
SO16
-
1.2
W
DIP16
-
2.2
W
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
PARAMETER
VALUE
UNIT
R th j-a
thermal resistance from junction to ambient in free air:
TDA8542T (SO16L)
100
K/W
TDA8542 (DIP16)
55
K/W
1997 Feb 19
5
¤ 2 V CC (see Fig.13). 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.
°
°
11038078.033.png 11038078.034.png

Plik z chomika:

Inne pliki z tego folderu:

Inne foldery tego chomika:

Zgłoś jeśli naruszono regulamin