Data Sheet
STEREO 2W AUDIO POWER AMPLIFIER
Functional Block Diagram
AA4002
GAIN SELECT
3
LEFT DOCK
13
LEFT GAIN 1
19
LEFT GAIN 2
18
Mute
Mode
HP Sense
5
4
Mode Control
10kΩ
_
17
21
10kΩ
LEFT OUT-
DC VOL
7
+
20kΩ
20kΩ
LEFT IN
12
_
_
+
15
BEEP IN
11
Beep Detect
+
Bias
Volume
Control
31 Steps
LEFT OUT+
Bias
+
10
RIGHT IN
2
_
+
_
28
RIGHT OUT+
SHUTDOWN
20kΩ
V
DD
6, 16, 27
20kΩ
Power
Management
10kΩ
+
_
26
RIGHT OUT-
GND
1, 8, 14, 20, 23
Bypass
22
Click and Pop
Suppression
Circuitry
10kΩ
9
24
25
RIGHT DOCK RIGHT GAIN 1
RIGHT GAIN 2
Figure 3. Functional Block Diagram of AA4002
Sep. 2006 Rev. 1. 1
4
BCD Semiconductor Manufacturing Limited