TDA8547TS Datasheet, PDF (4/20 Pages) NXP Semiconductors – 2 x 0.7 W BTL audio amplifier with output channel switching

Philips Semiconductors
2 × 0.7 W BTL audio amplifier with
output channel switching
Product specification
TDA8547TS
PINNING
SYMBOL PIN
DESCRIPTION
GND1
1 ground, channel 1
n.c.
2 not connected
OUT1+
3 positive loudspeaker terminal,
channel 1
MODE
4 operating mode select (standby, mute,
operating)
SVRR
5 half supply voltage, decoupling ripple
rejection
SELECT 6 input for selection of operating channel
n.c.
7 not connected
OUT2+
8 positive loudspeaker terminal,
channel 2
n.c.
9 not connected
GND2
10 ground, channel 2
V_CC2
n.c.
11 supply voltage, channel 2
12 not connected
OUT2−
13 negative loudspeaker terminal,
channel 2
IN2−
14 negative input, channel 2
IN2+
15 positive input, channel 2
IN1+
16 positive input, channel 1
IN1−
OUT1−
17 negative input, channel 1
18 negative loudspeaker terminal,
channel 1
n.c.
19 not connected
V_CC1
20 supply voltage, channel 1
handbook, halfpage
GND1 1
n.c. 2
20 VCC1
19 n.c.
OUT1+ 3
18 OUT1−
MODE 4
17 IN1−
SVRR 5
16 IN1+
TDA8547TS
SELECT 6
15 IN2+
n.c. 7
14 IN2−
OUT2+ 8
13 OUT2−
n.c. 9
12 n.c.
GND2 10
11 VCC2
MGK998
Fig.2 Pin configuration.
FUNCTIONAL DESCRIPTION
The TDA8547TS is a 2 × 0.7 W BTL audio power amplifier
capable of delivering 2 × 0.7 W output power to a 16 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 a 16 Ω loudspeaker an output power of
0.7 W can be delivered, when two channels are operating.
If only one channel is operating then an output power of
1.2 W can be delivered (5 V, 8 Ω).
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_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.
1998 Apr 01
4