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TDA1556Q Datasheet(Fiches technique) 5 Page - NXP Semiconductors

Numéro de pièce TDA1556Q
Description  2 x 22 W stereo BTL differential amplifier with speaker protection and dynamic distortion detector
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Fabricant  PHILIPS [NXP Semiconductors]
Site Internet  http://www.nxp.com
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 5 page
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July 1994
5
Philips Semiconductors
Product specification
2 x 22 W stereo BTL differential amplifier
with speaker protection and dynamic
TDA1556Q
FUNCTIONAL DESCRIPTION
The TDA1556Q contains two identical amplifiers each with
a fixed gain of 26 dB and differential input stages.
The device can be used for bridge-tied-load applications.
The circuit has the following features:
• low stand-by current (< 100 µA)
• low mute/stand-by switching current (low cost supply
switch)
• mute facility
Loudspeaker protection
Should a short circuit to ground occur, thereby forcing a
DC voltage
≥ 1 V across the loudspeaker, a built-in
protection circuit is activated to limit the DC voltage across
the speaker to
≤ 1 V. The delay time of the protection
circuit can be influenced by the external capacitor
connected to pin 15.
A dynamic distortion detector (DDD) is activated when
clipping occurs at one or both output stages. Its
information may be used to operate a sound processor or
DC volume control to attenuate the input signal, thereby
minimizing the distortion.
LIMITING VALUES
In accordance with the absolute maximum system (IEC 134)
DC CHARACTERISTICS
VP = 14.4 V; Tamb = 25 °C; unless otherwise specified
SYMBOL
PARAMETER
CONDITION
MIN.
MAX.
UNIT
VP
positive supply voltage
operating
18
V
non-operating
30
V
during 50 ms (load
dump protection);
rise time
≥ 2.5 ms
45
V
IOSM
non-repetitive peak output current
6A
IORM
repetitive peak output current
4A
Tstg
storage temperature range
−55
+150
°C
Tvj
virtual junction temperature
+150
°C
Vpsc
AC and DC short-circuit safe voltage
18
V
energy handling capability at outputs
VP = 0
200
mJ
Vpr
reverse polarity
6V
Ptot
total power dissipation
60
W
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
Supply
VP
positive supply voltage
note 1
6.0
14.4
18
V
IP
quiescent current
80
160
mA
VO
DC output voltage
note 2
6.9
V
Vos
DC output offset voltage
operating
−−
100
mV
Mute/stand-by
VON
switch-on voltage level
8.5
−−
V




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