TDA8547 Philips Semiconductors, TDA8547 Datasheet - Page 4

• Manufacturer Part Number: TDA8547
• Description: 2 x 1 W BTL audio amplifier with output channel switching
• Manufacturer: Philips Semiconductors

Philips Semiconductors
PINNING
FUNCTIONAL DESCRIPTION
The TDA8547(T) is a 2
capable of delivering 2
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 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 5 V
supply voltage and an 8
1 W can be delivered.
1997 Oct 07
GND1
OUT1+
MODE
SVRR
SELECT
n.c.
OUT2+
GND2
V
OUT2
IN2
IN2+
IN1+
IN1
OUT1
V
CC2
CC1
2
channel switching
SYMBOL
1 W BTL audio amplifier with output
PIN
10
12
13
14
15
16
11
1
2
3
4
5
6
7
8
9
ground, channel 1
positive loudspeaker terminal,
channel 1
operating mode select (standby,
mute, operating)
half supply voltage, decoupling
ripple rejection
input for selection of operating
channel
not connected
positive loudspeaker terminal,
channel 2
ground, channel 2
supply voltage, channel 2
negative loudspeaker terminal,
channel 2
negative input, channel 2
positive input, channel 2
positive input, channel 1
negative input, channel 1
negative loudspeaker terminal,
channel 1
supply voltage, channel 1
1 W output power to an 8
1 W BTL audio power amplifier
loudspeaker an output power of
DESCRIPTION
load
4
MODE pin
The whole device (both channels) is in the standby mode
(with a very low current consumption) if the voltage at the
MODE pin is >(V
MODE voltage level of less than 0.5 V the amplifier is fully
operational. In the range between 1.5 V and 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.
SELECT pin
If the voltage at the SELECT pin is in the range between
1.5 V and V
channels can be operational. If the SELECT pin is set to a
LOW voltage or grounded, then only channel 2 can
operate and the power amplifier of channel 1 will be in the
standby mode. In this case only the loudspeaker at
channel 2 can operate and the loudspeaker at channel 1
will be switched off. If the SELECT pin is set to a
HIGH level or connected to V
handbook, halfpage
CC
SELECT
OUT1
OUT2
MODE
GND1
SVRR
GND2
n.c.
1.5 V, or if it is kept floating, then both
CC
Fig.2 Pin configuration.
1
2
3
4
5
6
7
8
0.5 V), or if this pin is floating. At a
TDA8547
CC
MGK696
, then only channel 1 can
Preliminary specification
16
15
14
13
12
11
10
9
V CC1
OUT1
IN1
IN1
IN2
IN2
OUT2
V CC2
TDA8547
CC
1.5 V