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TDA8547T Datasheet(PDF) 4 Page - NXP Semiconductors

Part # TDA8547T
Description  2 x 1 W BTL audio amplifier with output channel switching
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

TDA8547T Datasheet(HTML) 4 Page - NXP Semiconductors

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1997 Oct 07
4
Philips Semiconductors
Preliminary specification
2
× 1 W BTL audio amplifier with output
channel switching
TDA8547
PINNING
SYMBOL
PIN
DESCRIPTION
GND1
1
ground, channel 1
OUT1+
2
positive loudspeaker terminal,
channel 1
MODE
3
operating mode select (standby,
mute, operating)
SVRR
4
half supply voltage, decoupling
ripple rejection
SELECT
5
input for selection of operating
channel
n.c.
6
not connected
OUT2+
7
positive loudspeaker terminal,
channel 2
GND2
8
ground, channel 2
VCC2
9
supply voltage, channel 2
OUT2
10
negative loudspeaker terminal,
channel 2
IN2
11
negative input, channel 2
IN2+
12
positive input, channel 2
IN1+
13
positive input, channel 1
IN1
14
negative input, channel 1
OUT1
15
negative loudspeaker terminal,
channel 1
VCC1
16
supply voltage, channel 1
Fig.2 Pin configuration.
handbook, halfpage
TDA8547
MGK696
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
GND1
OUT1
+
MODE
SVRR
SELECT
n.c.
OUT2
+
GND2
VCC2
OUT2
IN2
IN2
+
IN1
+
IN1
OUT1
VCC1
FUNCTIONAL DESCRIPTION
The TDA8547(T) is a 2
× 1 W BTL audio power amplifier
capable of delivering 2
× 1 W output power to an 8 Ω 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 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
Ω loudspeaker an output power of
1 W can be delivered.
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 >(VCC − 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 VCC − 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.
SELECT pin
If the voltage at the SELECT pin is in the range between
1.5 V and VCC − 1.5 V, or if it is kept floating, then both
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 VCC, then only channel 1 can


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