Datasheet
MAX9791/MAX9792
Windows Vista-Compliant Class D Speaker
Amplifiers with DirectDrive Headphone Amplifiers
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MAX9792C
LDO_EN
8
HP_INL
3
HP_INR
2
LDO_OUT
6
HP_EN 22
BEEP 21
SPKR_EN
27
MONO
CLASS D
AMPLIFIER
CONTROL
CHARGE
PUMP
LDO BLOCK
TO HPVDD
TO CPVSS
28
19, 24 OUT+
OUT-
HPL
HPR
HPVDD
C1P
C1N
CPGND
18, 25
10
9
16
15
14
13
12
CPVSS
C2
1.0µF
20, 23
PGNDGND
1, 5
SPKR_IN
2.0µF
2.0µF
2.7V TO 5.5V
2.7V TO 5.5V
TO CODEC
NOTE: LOGIC PINS CONFIGURED FOR:
LDO_EN = 1, LDO ENABLED
SPKR_EN = 0, SPEAKER AMPLIFIER ENABLED
HP_EN = 1, HEADPHONE AMPLIFIER ENABLED
C1
1.0µF
C3
10µF
RIN1
C
IN1
R
IN2
C
IN2
R
IN2
C
IN2
11
SENSE
TO HPVDD
4
C
COM
R
COM
µC BEEP INPUT
R
IN3
C
IN3
20kΩ
40.2kΩ
40.2kΩ
40.2kΩ
COM
0.1µF
PVDD
17, 26
2.7V TO 5.5V
AVDD
7
0.1µF
1.0µF1.0µF
10µF
MAX9792C Block Diagram