MAX9758 Maxim Integrated Products, MAX9758 Datasheet - Page 24

• Manufacturer Part Number: MAX9758
• Description: 2.3W Stereo Speaker Amplifiers and DirectDrive Headphone Amplifiers
• Manufacturer: Maxim Integrated Products

2.3W Stereo Speaker Amplifiers and DirectDrive
Headphone Amplifiers with Automatic Level Control
24
FIGURE SHOWN WITH AN ATTACK TIME = 495μs, RELEASE TIME = 990ms AND AN OUTPUT POWER LIMIT SET TO 1.2W, SPKR GAIN = 25.5dB, LDO SHOWN IN FIXED OUTPUT MODE, HPGAIN = 3dB.
______________________________________________________________________________________
0.033μF
3V TO 5.5V
C
LEFT-CHANNEL
BIAS
1μF
1μF
AUDIO INPUT
0.47μF
AUDIO INPUT
V
V
DD
DD
CHANNEL
C3, C4
180kΩ
RIGHT-
1μF
1μF
1μF
C1
47kΩ
C1
HPV
0V TO
R
B
DD
1μF
C
1μF
C
IN
CPGND
CPV
REGEN 24
IN
CPV
GAIN1
GAIN2
GAIN3
SHDN
BEEP
PREF 29
BIAS
VOL
C1P
C1N
V
INR
INL
DR 25
CT 35
DD
SS
SS
IN 33
36
26
28
2
3
4
27
5
10
11
13
12
14
15
1
MAX9756
HEADPHONE
SHUTDOWN
DETECTION
DETECTION
AND GAIN
CONTROL
CONTROL
VOLUME
0.1μF
CONTROL
VOLUME
VOLUME
BEEP
CHARGE
DETECT
PUMP
GAIN/
GAIN/
PEAK
4.5V TO 5.5V
32
V
31
DD
GND
100μF
LDO
6, 22
PGND
4.5V TO 5.5V
9, 19
AMPLIFIER
AMPLIFIER
PV
BTL
BTL
DD
0.1μF
21
20
23
17
16
34 OUT
30 SET
18
7
8
MAX9756 Block Diagram
OUTL+
OUTL-
OUTR+
OUTR-
HPV
HPS
HPL
HPR
DD
1μF
4.65V OUTPUT TO CODEC
1μF
3V TO 5.5V
1μF
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