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TDA8542TS Scheda tecnica(PDF) 4 Page - NXP Semiconductors

Il numero della parte TDA8542TS
Spiegazioni elettronici  2 x 0.7 W BTL audio amplifier
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Produttore elettronici  PHILIPS [NXP Semiconductors]
Homepage  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

TDA8542TS Scheda tecnica(HTML) 4 Page - NXP Semiconductors

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1998 Mar 25
4
Philips Semiconductors
Product specification
2
× 0.7 W BTL audio amplifier
TDA8542TS
PINNING
SYMBOL
PIN
DESCRIPTION
LGND
1
ground, left channel
n.c.
2
not connected
OUTL+
3
positive loudspeaker terminal,
left channel
MODE
4
operating mode select (standby,
mute, operating)
SVR
5
half supply voltage, decoupling
ripple rejection
BTL/SE
6
BTL loudspeaker or SE
headphone operation
n.c.
7
not connected
OUTR+
8
positive loudspeaker terminal,
right channel
n.c.
9
not connected
RGND
10
ground, right channel
VCCR
11
supply voltage, right channel
n.c.
12
not connected
OUTR
13
negative loudspeaker terminal,
right channel
INR
14
negative input, right channel
INR+
15
positive input, right channel
INL+
16
positive input, left channel
INL
17
negative input, left channel
OUTL
18
negative loudspeaker terminal,
left channel
n.c.
19
not connected
VCCL
20
supply voltage, left channel
Fig.2 Pin configuration.
handbook, halfpage
TDA8542TS
MBK453
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
LGND
n.c.
OUTL
+
MODE
SVR
BTL/SE
n.c.
OUTR
+
n.c.
RGND
VCCL
n.c.
OUTL
INL
INL
+
INR
+
INR
OUTR
n.c.
VCCR
FUNCTIONAL DESCRIPTION
The TDA8542TS 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 with a 16
Ω loudspeaker an output
power of 0.7 W can be delivered.
Mode select pin
The device 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.


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