max9758etjt Maxim Integrated Products, Inc., max9758etjt Datasheet - Page 25

• Manufacturer Part Number: max9758etjt
• Description: 2.3w Stereo Speaker Amplifiers And Directdrive Headphone Amplifiers With Automatic Level Control
• Manufacturer: Maxim Integrated Products, Inc.

Headphone Amplifiers with Automatic Level Control
2.3W Stereo Speaker Amplifiers and DirectDrive
100µF
3V TO 5.5V
FIGURE SHOWN WITH AN ATTACK TIME = 495µs, RELEASE TIME = 990ms AND AN OUTPUT POWER LIMIT SET TO 1.2W, SPKR GAIN = 25.5dB, HP GAIN = 3dB.
______________________________________________________________________________________
C
LEFT-CHANNEL
BIAS
1µF
1µF
AUDIO INPUT
0.47µF
AUDIO INPUT
V
DD
CHANNEL
180kΩ
RIGHT-
1µF
1µF
C1
47kΩ
C2
HPV
R
0V TO
B
DD
1µF
C
1µF
C
IN
CPGND
CPV
CPV
IN
GAIN1
GAIN2
GAIN3
SHDN
PREF 27
BEEP
BIAS
C1N
VOL
C1P
V
INL
INR
DR 23
CT 30
DD
SS
SS
26
28
1
2
3
25
4
9
10
12
11
13
14
32
31
MAX9757
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
29
V
28
DD
GND
100µF
5, 21
PGND
4.5V TO 5.5V
8, 18
AMPLIFIER
AMPLIFIER
PV
BTL
BTL
DD
0.1µF
MAX9757 Block Diagram
20
19
22
15
16
17
6
7
OUTL+
OUTL-
OUTR+
OUTR-
HPR
HPV
HPS
HPL
DD
1µF
3V TO 5.5V
25