TDA8948J_1
© NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 01 — 27 February 2008
15 of 26
NXP Semiconductors
TDA8948J
4-channel audio amplifier
13. Application information
13.1 Application diagrams
Fig 11. Typical application diagram without on/off switching plops
V
CC1
V
CC2
16
220 nF
IN1+
IN2+
OUT1+
OUT2
−
220 nF
RL4
Ω
RL4
Ω
470
µ
F
1
4
VCC
1000
µ
F
100 nF
470 nF
IN3+
IN4+
OUT3
−
OUT4+
Vi
Vi
Vi
VCC
VCC
RL8
Ω
−
+
−
+
−
+
22
µ
F
2.2
µ
F
10 k
Ω
50 k
Ω
270
Ω
BC547
BC547
7.5 V
micro-
controller
2
15
GND1
GND2
60 k
Ω
60 k
Ω
3
8
6
60 k
Ω
60 k
Ω
9
12
14
17
TDA8948J
MUTE 3 + 4
ON 3 + 4
010aaa050
STANDBY ALL
MUTE ALL
ON 1 + 2
0.5VCC
V
CC
CIV 13
MODE1
SGND
10
7
SVR 11
MODE2 5
SHORT-CIRCUIT
AND
TEMPERATURE
PROTECTION
VREF
47
µ
F
1.5 k
Ω
100 k
Ω
+
+
+
+
+
−
−
+
Table 11.
Amplifier selection by microcontroller
Microcontroller with open-collector output; see
Figure 11
.
Microcontroller
Channels 1 and 2
Channels 3 and 4
LOW
On mode
On mode
HIGH
Mute mode
Mute mode
