Max9758 block diagram – Rainbow Electronics MAX9758 User Manual
Page 26
MAX9756/MAX9757/MAX9758
2.3W Stereo Speaker Amplifiers and DirectDrive
Headphone Amplifiers with Automatic Level Control
26
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MAX9758 Block Diagram
HPV
DD
HPS
INR
BIAS
VOL
GAIN1
GAIN2
BEEP
3V TO 5.5V
CPV
DD
C1P
C1N
C1
1
μF
C
BIAS
1
μF
0V TO
HPV
DD
C
IN
1
μF
C
IN
1
μF
0.47
μF
1
μF
CPGND
INL
31
24
26
1
2
4
9
10
12
11
CPV
SS
13
V
SS
V
DD
V
DD
14
REGEN 23
28
5, 21
30 OUT
27 SET
32
1
μF
3V TO 5.5V
6
29
7
20
19
17
22
15
16
HPL
HPR
MAX9758
0.1
μF
0.1
μF
VOLUME
BTL
AMPLIFIER
RIGHT-CHANNEL
AUDIO INPUT
OUTR+
OUTR-
CHARGE
PUMP
VOLUME
AND GAIN
CONTROL
HEADPHONE
DETECTION
SHUTDOWN
CONTROL
BEEP
DETECTION
VOLUME
BTL
AMPLIFIER
LEFT-CHANNEL
AUDIO INPUT
OUTL+
4.5V TO 5.5V
V
DD
OUTL-
GAIN3
SHDN
3
25
8, 18
100
μF
4.5V TO 5.5V
PV
DD
R
B
FIGURE SHOWN WITH SPKR GAIN = 25.5dB, LDO SHOWN IN ADJUSTABLE OUTPUT MODE SET TO 3.3V, HP GAIN = 3dB.
C2
1
μF
GND
PGND
LDO
1
μF
82k
Ω
47k
Ω
1
μF
3.3V OUTPUT TO CODEC
10pF