MAX9757ETJ+T Maxim Integrated Products, MAX9757ETJ+T Datasheet - Page 26

• Manufacturer Part Number: MAX9757ETJ+T
• Description: IC AMP AUDIO PWR 2.3W AB 32TQFN
• Manufacturer: Maxim Integrated Products
• Series: DirectDrive™r
• Type: Class ABr

Specifications of MAX9757ETJ+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

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