SAMHOP Microelectronics Corp.
3W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL
FUNCTIONAL BLOCK DIAGRAM
RHPIN
R
MUX
_
+
RLINEIN
_
+
ROUT+
HP/LINE
RIN
BYP
BYP
BYP
+
_
+
_
ROUT-
PVDD
EN
SE/BTL
SE/BTL
MUX
Control
HP/LINE
PGND
VDD
Power
Management
VOLUME
BYPASS
32-Step
Volume
Control
SEDIFF
SEMAX
FADE
SHUTDOWN
AGND
LHPIN
L
MUX
_
LLINEIN
_
+
+
LOUT+
LOUT-
HP/LINE
LIN
BYP
BYP
+
_
_
+
EN
SE/BTL
BYP
NOTE: All resistor wipers are adjusted with 32 step volume control.
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V.1.3 Revised April 02,2007