Block diagrams (continued) – Rainbow Electronics MAX9755 User Manual
Page 25
MAX9750/MAX9751/MAX9755
2.6W Stereo Audio Power Amplifiers and
DirectDrive Headphone Amplifiers
______________________________________________________________________________________
25
HPV
DD
HPS
INR1
BIAS
GAIN
IN1/2
SHDN
3V TO 5.5V
CPV
DD
V
DD
V
DD
V
DD
C1P
C1N
CV
SS
V
SS
GND
PGND
C1
1µF
C
BIAS
1µF
C
IN
1µF
C
IN
1µF
C2
1µF
1µF
CPGND
INL1
27
(3)
21
(25)
28
(4)
24
(28)
23
(27)
2
(6)
22
(26)
7
(11)
8
(12)
10
(14)
9
(13)
11
(15)
12
(16)
26
(2)
3, 19
(7, 23)
1
(5)
10µF
3V TO 5.5V
6, 16 (10, 20)
4
(8)
25
(1)
5
(9)
18
(22)
17
(21)
15
(19)
20
(24)
14
(18)
13
(17)
HPOUTL
HPOUTR
MAX9751
0.1µF
0.1µF
4.5V TO 5.5V
BTL
AMPLIFIER
RIGHT CHANNEL
AUDIO INPUT
INR2
C
IN
1µF
RIGHT CHANNEL
AUDIO INPUT
OUTR+
OUTR-
CHARGE
PUMP
MUX AND
GAIN
CONTROL
HEADPHONE
DETECTION
SHUTDOWN
CONTROL
INPUT
MUX
INPUT
MUX
BTL
AMPLIFIER
LEFT CHANNEL
AUDIO INPUT C
IN
1µF
INL2
LEFT CHANNEL
AUDIO INPUT
OUTL+
PV
DD
4.5V TO 5.5V
V
DD
OUTL-
( ) TSSOP PIN.
LOGIC PINS CONFIGURED FOR:
GAIN = 1, 9dB SPEAKER GAIN/0dB HEADPHONE GAIN.
IN1/2 = 1, SELECTED INPUT LINE 1.
SHDN = 1, PART ACTIVE.
Block Diagrams (continued)