Maxim MAX9777 Stereo Amplifier User Manual


 
MAX9777/MAX9778
Stereo 3W Audio Power Amplifiers with
Headphone Drive and Input Mux
____________________________________________________________________________________________________________________________________________________________________________
23
MAX9777
2:1
INPUT
MUX
INL1
10k
0.1µF
1
µF
100
µF
0.68
µF 15k
1k
15k
0.68
µF
0.68
µF
0.68
µF
4.5V TO 5.5V
PV
DD
V
DD
3, 4
8
7
10
12
15k
15k
33.2k
27.4k
10k
10k
0.047µF
220µF
220µF
33.2k
27.4k
0.047µF
22
21
24
26
16
11, 25
5
6
17
19
20
14
28
1
15
2
4.5V TO 5.5V
GAINLB
GAINLA
OUTL+
OUTL-
10k
10k
10k
AUDIO
INPUT
AUDIO
INPUT
INL2
BIAS
BIAS
GAIN
SET
MUX
2:1
INPUT
MUX
INR1
10k
GAINRB
GAINRA
OUTR+
OUTR-
10k
10k
10k
AUDIO
INPUT
AUDIO
INPUT
INR2
SCL
SDA
ADD
INT
LOGIC
HPS
HPS
GAIN
SET
MUX
SHDN
1k
10k
15k
15k
TO
µCONTROLLER
GND
18
9, 13, 23, 27
PGND
Functional Diagrams