max9791 Maxim Integrated Products, Inc., max9791 Datasheet - Page 27

• Manufacturer Part Number: max9791
• Description: Windows Vista-compliant Class D Speaker Amplifiers With Directdrive Headphone Amplifiers
• Manufacturer: Maxim Integrated Products, Inc.

Amplifiers with DirectDrive Headphone Amplifiers
TO CODEC
1.0μF
4.5V TO 5.5V
NOTE: LOGIC PINS CONFIGURED FOR:
LDO_EN = 1, LDO ENABLED
SPKR_EN = 0, SPEAKER AMPLIFIERS ENABLED
HP_EN = 1, HEADPHONE AMPLIFIER ENABLED
1.0μF
1.0μF
μC BEEP INPUT
Windows Vista-Compliant Class D Speaker
CIN1
C
C
______________________________________________________________________________________
C
C
4.5V TO 5.5V
IN3
IN1
C
IN3
IN2
IN2
0.1μF
1.0μF
C
R
R
COM
RIN1
RIN1
IN2
R
IN2
R
IN3
IN3
R
COM
SPKR_INR
SPKR_INL
LDO_OUT 6
SPKR_EN 27
LDO_EN 8
HP_INL 3
HP_INR 2
HP_EN 22
AVDD 7
BEEP 21
COM
28
4
1
LDO BLOCK
CONTROL
20kΩ
20kΩ
5
GND
AMPLIFIER
20, 23
MAX9791A/MAX9791B Block Diagram
CLASS D
STEREO
PGND
PVDD
4.5V TO 5.5V
17, 26
40.2kΩ
0.1μF
MAX9791A
MAX9791B
TO HPVDD
40.2kΩ
40.2kΩ
CHARGE
TO HPVDD
PUMP
TO CPVSS
CPVSS
12
C2
1.0μF
16
19
18
24
25
10
15
14
13
11
9
OUTL+
OUTL-
OUTR+
OUTR-
HPL
HPR
SENSE
HPVDD
C1P
CPGND
C1N
C1
1.0μF
2.7V TO 5.5V
C3
10μF
27