MAX9756ETX+ Maxim Integrated Products, MAX9756ETX+ Datasheet - Page 25
![IC AMP AUDIO PWR 2.3W AB 36TQFN](/photos/6/65/66503/36-tqfn_21-0141i_sml.jpg)
MAX9756ETX+
Manufacturer Part Number
MAX9756ETX+
Description
IC AMP AUDIO PWR 2.3W AB 36TQFN
Manufacturer
Maxim Integrated Products
Series
DirectDrive™r
Type
Class ABr
Datasheet
1.MAX9756ETX.pdf
(31 pages)
Specifications of MAX9756ETX+
Output Type
2-Channel (Stereo) with Stereo Headphones
Max Output Power X Channels @ Load
2.3W x 2 @ 3 Ohm; 130mW x 2 @ 16 Ohm
Voltage - Supply
4.5 V ~ 5.5 V
Features
Depop, Short-Circuit and Thermal Protection, Shutdown, Volume Control
Mounting Type
Surface Mount
Package / Case
36-TQFN Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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