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TDA8547TSN1/02,118

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21
1998 Apr 01 4
NXP Semiconductors Product specification
2 × 0.7 W BTL audio amplifier with
output channel switching
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
11 supply voltage, channel 2
n.c. 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− 17 negative input, channel 1
OUT1− 18 negative loudspeaker terminal,
channel 1
n.c. 19 not connected
V
CC1
20 supply voltage, channel 1
Fig.2 Pin configuration.
handbook, halfpage
GND1
n.c.
OUT1+
MODE
SVRR
SELECT
n.c.
OUT2+
n.c.
GND2
V
CC1
n.c.
OUT1−
IN1−
IN2+
IN2−
IN1+
OUT2−
n.c.
V
CC2
1
2
3
4
5
6
7
8
9
10
11
12
20
19
18
17
16
15
14
13
TDA8547TS
MGK998
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 5
NXP Semiconductors Product specification
2 × 0.7 W BTL audio amplifier with
output channel switching
TDA8547TS
SELECT pin
If the voltage at the SELECT pin is in the range between
1.5 V and V
CC
− 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 V
CC
, then only channel 1 can
operate and the power amplifier of channel 2 will be in the
standby mode. In this case only the loudspeaker at
channel 1 can operate and the loudspeaker at channel 2
will be switched off. Setting the SELECT pin to a LOW or
a HIGH voltage results in a reduction of quiescent current
consumption by a factor of approximately 2.
Switching with the SELECT pin during operating is not
plop-free, because the input capacitor of the channel
which is coming out of standby needs to be charged first.
For plop-free channel selecting the device has first to be
set in mute condition with the MODE pin (between 1.5 V
and V
CC
− 1.5 V), then set the SELECT pin to the new
level, after a delay set the MODE pin to a LOW level.
The delay needed depends on the values of the input
capacitor and the feedback resistors. Time needed is
approx. 10 × C1 × (R1 + R2), so approximately 0.6 s. for
the values in Fig.4.
Table 1 Control pins MODE and SELECT versus status of output channels
Voltage levels at control pins at V
P
= 5 V; for other supply voltages see Figs. 14 and 15.
Notes
1. HIGH = V
pin
>V
CC
− 0.5 V.
2. NC = not connected or floating.
3. X = don’t care.
4. HVP = 1.5 V < V
pin
<V
CC
− 1.5 V.
5. LOW = V
pin
<0.5V.
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
CONTROL PIN
STATUS OF OUTPUT
CHANNEL
TYP. I
q
(mA)
MODE SELECT CHANNEL 1 CHANNEL 2
HIGH
(1)
/NC
(2)
X
(3)
standby standby 0
HVP
(4)
HVP
(4)
/NC
(2)
mute mute 15
LOW
(5)
HVP
(4)
/NC
(2)
on on 15
HVP
(4)
/LOW
(5)
HIGH
(1)
mute/on standby 8
HVP
(4)
/LOW
(5)
HVP
(4)
/NC
(2)
mute/on mute/on 15
HVP
(4)
/LOW
(5)
LOW
(5)
standby mute/on 8
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 − 1A
T
stg
storage temperature −55 +150 °C
T
amb
operating ambient temperature −40 +85 °C
V
Psc
AC and DC short-circuit safe voltage − 10 V
P
tot
power dissipation − 1.1 W
1998 Apr 01 6
NXP Semiconductors Product specification
2 × 0.7 W BTL audio amplifier with
output channel switching
TDA8547TS
QUALITY SPECIFICATION
In accordance with “SNW-FQ-611-E”.
THERMAL CHARACTERISTICS
Table 2 Maximum ambient temperature at different conditions
Note
1. At THD = 10%.
SYMBOL PARAMETER CONDITIONS VALUE UNIT
R
th(j-a)
thermal resistance from junction to ambient in free air 110 K/W
V
CC
(V)
R
L
(Ω)
APPLICATION
P
o
(W)
(1)
CONTINUOUS SINE WAVE DRIVEN
P
max
(W)
T
amb(max)
(°C)
3.3 4 1 channel 1.2 0.58 86
3.3 4 2 channels 2 × 1.2 1.12 27
3.3 8 1 channels 0.6 0.3 117
3.3 8 2 channels 2 × 0.6 0.60 84
5 8 1 channel 1.2 0.67 76
5 8 2 channels 2 × 1.2 1.33 −
5 16 1 channel 0.7 0.35 112
5 16 2 channels 2 × 0.7 0.70 73
Fig.3 Power derating curve.
handbook, halfpage
0 40 80 160
0
2.0
120
1.6
1.2
0.8
0.4
MGK987
T
amb
(°C)
P
(W)
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21

TDA8547TSN1/02,118

Mfr. #:
Buy TDA8547TSN1/02,118
Manufacturer:
NXP Semiconductors
Description:
IC AUDIO AMP 2-CHAN SOT266-1
Lifecycle:
New from this manufacturer.
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