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1998 Apr 07 10
Philips Semiconductors Product specification
2 × 8 W stereo BTL audio output amplifier
with DC volume control
TDA7057AQ
Fig.13 Test and application diagram.
(1) This capacitor can be omitted if the 220 µF electrolytic capacitor is connected close to pin 5.
(2) R
L
=16Ω.
handbook, full pagewidth
MBG679
13
11
TEMPERATURE
MCL
PROTECTION
STABILIZER
10
8
9 126
220 µF
100 nF
4
(1)
(2)
(2)
V
P
= 12 V
V
P
= 12 V
5
7
R
s
= 5 kΩ
1 MΩ1 µF
R
s
= 5 kΩ
DC-
volume
signal
ground
volume
control
volume
control
power
ground
470 nF
470 nF
input 1
input 2
TDA7057AQ
3
1
I − i
I + i
I + i
I − i
maximum voltage
gain 34 dB
1, 7
22 kΩ
100 kΩ
1 µF
maximum voltage
gain 40 dB
1, 7
−
+
−
+