max9758etjt Maxim Integrated Products, Inc., max9758etjt Datasheet - Page 12

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

2.3W Stereo Speaker Amplifiers and DirectDrive
Headphone Amplifiers with Automatic Level Control
12
MAX9756 MAX9757
10
11
12
13
14
15
16
17
18
20
21
23
24
25
26
27
28
29
30
31
32
33
34
35
36
EP
—
______________________________________________________________________________________
PIN
EP
10
11
12
13
14
15
16
17
19
20
22
—
23
24
25
26
27
—
28
29
—
—
30
31
—
9
MAX9758
EP
10
11
12
13
14
15
16
17
19
20
22
23
—
24
25
26
—
27
28
—
—
30
—
31
29
9
CPGND Charge-Pump Ground
OUTR+ Right-Channel Positive Speaker Output
REGEN
CPV
HPV
CPV
OUTR-
NAME
SHDN
PREF
BIAS
GND
C1N
HPR
OUT
C1P
HPL
HPS
VOL
V
V
SET
V
INR
DR
CT
EP
IN
DD
DD
SS
DD
DD
SS
Charge-Pump Power Supply. Bypass with 1µF ceramic capacitor to CPGND.
Charge-Pump Flying-Capacitor Positive Terminal. Connect a 1µF capacitor from C1P
to C1N.
Charge-Pump Flying-Capacitor Negative Terminal. Connect a 1µF capacitor from
C1P to C1N.
Charge-Pump Negative Output. Connect to V
Headphone Amplifier Negative Power Supply. Bypass with 1µF ceramic capacitor to
GND.
Right Headphone Output
Left Headphone Output
Headphone Positive Power Supply. Bypass with 1µF ceramic capacitor to GND.
Right-Channel Negative Speaker Output
H ead p hone S ense Inp ut. Leave H P S unconnected i f autom ati c head p hone sensi ng
i s not used .
LD O E nab l e. C onnect RE GE N to V
d i sab l e LD O.
Automatic Level Control Attack to Release Time Ratio Select. Hardwired to V
GND, or BIAS to set the attack to release ratio; see the ALC section.
Common-Mode Bias Voltage. Bypass with a 1.0µF capacitor to GND.
Shutdown Input. Drive SHDN low to disable the audio amplifiers. Connect SHDN to
V
Analog Volume Control Input
P ow er - Li m i ti ng Inp ut. C onnect a r esi stor fr om P RE F to G N D to set the sp eaker outp ut
cl am p i ng l evel . Leave P RE F unconnected to d i sab l e ALC ; see the ALC secti on.
Regulator Feedback Input. Connect to GND for 4.65V fixed output. Connect to
resistor-divider for adjustable output; see the Low-Dropout Linear Regulator section.
Ground
Power Supply
LDO Input. Bypass with two 1µF ceramic capacitors to GND.
LDO Output. Bypass with two 1µF ceramic capacitors to GND.
Automatic Level Control Attack and Release Timing Capacitor. Connect CT to GND
to disable ALC; see the ALC section.
Right-Channel Audio Input
Power-Supply and LDO Input. Bypass with two 1µF ceramic capacitors to GND.
Exposed Pad. The external pad lowers the package’s thermal impedance by
providing a direct-heat conduction path from the die to the PC board. Connect the
exposed thermal pad to GND.
DD
for normal operation.
D D
Pin Description (continued)
FUNCTION
to enab l e the LD O. C onnect to G N D to
SS
.
DD
,