Rainbow Electronics MAX9792 - Manual (Page 27)

MAX9791/MAX9792
Windows Vista-Compliant Class D Speaker
Amplifiers with DirectDrive Headphone Amplifiers
______________________________________________________________________________________ 27
MAX9791A
MAX9791B
LDO_EN 8
HP_INL 3
HP_INR 2
AVDD 7
LDO_OUT 6
HP_EN 22
BEEP 21
SPKR_EN 27
STEREO
CLASS D
AMPLIFIER
CONTROL
CHARGE
PUMP
LDO BLOCK
TO HPVDD
TO CPVSS
0.1 μF
0.1 μF
PVDD
17, 26
4.5V TO 5.5V
1
19 OUTL+
OUTL-
OUTR+
OUTR-
HPL
HPR
HPVDD
C1P
C1N
CPGND
18
24
25
10
9
16
15
14
13
12
CPVSS
C2
1.0
μF
20, 23
PGND GND
5
SPKR_INL
SPKR_INR 28
1.0 μF 1.0 μF
1.0 μF 1.0 μF
4.5V TO 5.5V
4.5V TO 5.5V
2.7V TO 5.5V
TO CODEC
NOTE: LOGIC PINS CONFIGURED FOR:
LDO_EN = 1, LDO ENABLED
SPKR_EN = 0, SPEAKER AMPLIFIERS ENABLED
HP_EN = 1, HEADPHONE AMPLIFIER ENABLED
C1
1.0
μF
C3
10
μF
R IN3
RIN1
C IN3
C IN1
RIN1 CIN1
R IN3
C IN3
R IN2
C IN2
R
IN2
C
IN2
11 SENSE
40.2k Ω
40.2k Ω
40.2k Ω
TO HPVDD
20k Ω
20k Ω
4
C COM R COM
μC BEEP INPUT
COM
MAX9791A/MAX9791B Block Diagram