SG Micro SGM4703 - Typical Application Circuits

High-Power Stereo Class-D Audio Power Amplifier
SGM4703 with Adjustable Power Limit and Automatic Level Control
29
DECEMBER 2022
SG Micro Corp
www.sg-micro.com
TYPICAL APPLICATION CIRCUITS
SGM4703
EN
FAULTB
INPL
INNL
GAIN
FREQ
AV DD
AG ND
GV DD
PLIMIT
INNR
INPR
ALC
MODS
PV DD
PV DD
BS TPL
VO PL
PG ND
VO NL
BS T NL
BS T NR
VO NR
PG ND
VO PR
BS TPR
PV DD
PV DD
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
EN
INPL
INNL
V
DD
R
EN
10 kΩ
C
IN
1μF
C
IN
1μF
R
AV D D
10Ω
INNR
INPR
C
AV D D
1μF
C
G V DD
1μF
C
IN
1μF
C
IN
1μF
LS L
LS R
SP EAK ER
SP EAK ER
0. 1μF
0. 1μF
0. 1μF
C
PV D D
10 nF
C
PV D D
10 nF
0. 1μF
C
PV D D
1μ
F
C
B1
L
F1
Ferrit e B ead
1nF
C
F1
1nF
C
F2
L
F2
Ferrit e B ead
L
F3
Ferrit e B ead
L
F4
Ferrit e B ead
1nF
C
F3
1nF
C
F4
C
B2
C
B3
C
B4
C
PV D D
1μF
V
DD
C
PV D D
22 0μF
+
V
DD
C
PV D D
22 0μF
+
Figure 16. Differential Inputs in Non-ALC Mode with DSM
SGM4703
EN
FAULTB
INPL
INNL
GAIN
FREQ
AV DD
AG ND
GV DD
PLIMIT
INNR
INPR
ALC
MODS
PV DD
PV DD
BS TPL
VO PL
PG ND
VO NL
BS T NL
BS T NR
VO NR
PG ND
VO PR
BS TPR
PV DD
PV DD
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
EN
INL
V
DD
R
EN
10 kΩ
C
IN
1μF
C
IN
1μF
R
AV D D
10
Ω
INR
C
AV D D
1μF
C
G V DD
1μF
C
IN
1μF
C
IN
1μF
LS L
LS R
SP EAK ER
SP EAK ER
0. 1
μF
0. 1μF
0. 1μF
C
PV D D
10 nF
C
PV D D
10 nF
0. 1μF
C
PV D D
1μF
C
B1
L
F1
Ferrit e B ead
1nF
C
F1
1nF
C
F2
L
F2
Ferrit e B ead
L
F3
Ferrit e B ead
L
F4
Ferrit e B ead
1nF
C
F3
1nF
C
F4
C
B2
C
B3
C
B4
C
PV D D
1μF
V
DD
C
PV D D
22 0μF
+
V
DD
C
PV D D
22 0μF
+
Figure 17. Single-Ended Inputs in ALC-1 Mode with SSM