SAMHOP Microelectronics Corp.
3W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL
APPLICATION INFORMATION
1
2
3
Application circuit using the SM7498HL in an LCD monitor with 16Ω speaker outputs and volume control
D
C
B
A
VDD
15 , 21 , 28
+
10 uf
0.1 uf
4
5
9
MUTE
SE / BTL
10
SHUTDOWN
HP / LINE
Right Audio Input
1.0 uf
17
18
12
13
ROUT +
ROUT +
ROUT -
ROUT -
20
19
RLINEIN
RHPIN
1.0 uf
SM7498HL
Left Audio Input
1.0 uf
1.0 uf
25
26
2
LOUT +
LOUT +
LOUT -
LOUT -
22
23
LLINEIN
LHPIN
3
6
BYPASS
8
VDD
VOLUME
1 uf
5K
1 , 7 , 14 , 16 , 27
0.1 uf
Figure 1. Typical Bridge-Tied-Load(BTL) audio amplifier application circuit for an LCD monitor
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2
3
Page 6
V.0.2 April 03,2007
SAMHOP [ SAMHOP MICROELECTRONICS CORP. ]
