MAX9758ETJ+T Maxim Integrated Products, MAX9758ETJ+T Datasheet - Page 25

• Manufacturer Part Number: MAX9758ETJ+T
• Description: IC AMP AUDIO PWR 2.3W AB 32TQFN
• Manufacturer: Maxim Integrated Products
• Series: DirectDrive™r
• Type: Class ABr

Specifications of MAX9758ETJ+T

• 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: 32-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