SAMHOP Microelectronics Corp.

3W STEREO AUDIO POWER AMPLIFIER WITH ADVANCED DC VOLUME CONTROL

1

2

3

3

2

1

D

C

B

A

0.1 uf

1.0 uf

1.0 uf

1.0 uf

0.1 uf

1 uf

1.0 uf

5K

9

10

SE / BTL

HP / LINE

MUTE

SHUTDOWN

4

5

17

18

12

13

ROUT +

ROUT +

ROUT -

ROUT -

LOUT -

LOUT -

LOUT +

LOUT +

25

26

2

3

6

BYPASS

15 , 21 , 28

19

20

22

23

RLINEIN

RHPIN

LLINEIN

LHPIN

VDD

1 , 7 , 14 , 16 , 27

VDD

8

VOLUME

Right Audio Input

Left Audio Input

SM7498HL

+

10 uf

Application circuit using the SM7498HL in an LCD monitor with 16Ω speaker outputs and volume control

APPLICATION INFORMATION

Figure 1. Typical Bridge-Tied-Load(BTL) audio amplifier application circuit for an LCD monitor

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V.0.2 April 03,2007