TDA1556 Просмотр технического описания (PDF) - Philips Electronics
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производитель
TDA1556
Philips Electronics
TDA1556 Datasheet PDF : 10 Pages
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Philips Semiconductors
2 x 22 W stereo BTL differential amplifier
with speaker protection and dynamic
Product specification
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)
SYMBOL
PARAMETER
VP
positive supply voltage
IOSM
IORM
Tstg
Tvj
Vpsc
Vpr
Ptot
non-repetitive peak output current
repetitive peak output current
storage temperature range
virtual junction temperature
AC and DC short-circuit safe voltage
energy handling capability at outputs
reverse polarity
total power dissipation
CONDITION
operating
non-operating
during 50 ms (load
dump protection);
rise time ≥ 2.5 ms
VP = 0
MIN. MAX. UNIT
−
18
V
−
30
V
−
45
V
−
6
A
−
4
A
−55
+150 °C
−
+150 °C
−
18
V
−
200
mJ
−
6
V
−
60
W
DC CHARACTERISTICS
VP = 14.4 V; Tamb = 25 °C; unless otherwise specified
SYMBOL
PARAMETER
CONDITIONS
Supply
VP
positive supply voltage
IP
quiescent current
VO
DC output voltage
Vos
DC output offset voltage
Mute/stand-by
VON
switch-on voltage level
note 1
note 2
operating
MIN.
TYP. MAX. UNIT
6.0
14.4 18
V
−
80
160
mA
−
6.9
−
V
−
−
100
mV
8.5
−
−
V
July 1994
5
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