SAMHOP Microelectronics Corp.
3W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL
APPLICATION INFORMATION
The figure is schematic diagrams of typical notebook computer application circuits.
Right
Speaker
1
Cs
V
DD
Ci
V
DD
Cs
4
13
VDD
VOLUME
12
LLINEIN
GND
11
C
(BYP)
Cc
1kΩ
In From DAC
or
Potentiometer
(DC Voltage)
16
ROUT-
RPGND
15
PVDD
ROUT+
14
RLINEIN
SE/BTL
100kΩ
Cc
2
V
DD
100kΩ
1kΩ
Right Line
Audio Source
3
Headphones
Left Line
Audio Source
Ci
5
V
DD
6
LPVDD
BYPASS
7
LOUT-
SHUTDOWN
10
System
Control
8
LPGND
LOUT+
9
Left
Speaker
Figure 1. SM7512 Application Circuit Using Single-Ended Inputs and Input MUX
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V.1.4 Revised May 28,2007