TDA8947J Datasheet, PDF (15/24 Pages) NXP Semiconductors – 4-channel audio amplifier (SE: 1 W to 25 W; BTL: 4 W to 50 W)

Philips Semiconductors
TDA8947J
4-channel audio amplifier
13. Application information
13.1 Application diagrams
V_CC
10
50
100
kΩ
kΩ
kΩ
270 Ω
7.5 V
micro-
controller
1.5
kΩ
BC547
2.2
µF
BC547
220 nF _{IN1+ 8}
V_i
60 kΩ
220 nF _{IN2+ 6}
V_i
60 kΩ
IN3+ 9
470 nF
60 kΩ
V_i
IN4+ 12
60 kΩ
CIV 13
V_CC
22 µF
V_CC1
3
V_CC2
16
100 nF
V_CC
1000 µF
1 OUT1+
4 OUT2−
−
+
14 OUT3−
−
+
17 OUT4+
+
R_L
− ^4Ω
R_L
4Ω
470 µF
R_L
8Ω
SHORT-CIRCUIT
AND
TEMPERATURE
PROTECTION
SVR 11 _0.5VCC
V_ref
47
µF
SGND 7
MODE1 10
MODE2
V_CC
5
STANDBY ALL
MUTE ALL
ON 1 + 2
MUTE 3 + 4
ON 3 + 4
TDA8947J
2
GND1
15
GND2
mdb017
Fig 12. Typical application diagram without on/off switching plops.
Table 11: Amplifier selection by microcontroller
Microcontroller with open-collector output; see Figure 12
Microcontroller Channels 1 and 2
Channels 3 and 4
LOW
on
on
HIGH
mute
mute
9397 750 10779
Preliminary data
Rev. 01 — 06 February 2004
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
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