SG Micro SGM4703 - Page 15

High-Power Stereo Class-D Audio Power Amplifier
SGM4703 with Adjustable Power Limit and Automatic Level Control
15
DECEMBER 2022
SG Micro Corp
www.sg-micro.com
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
T
A
= +25℃, f = 1kHz, C
IN
= 4 × 1µF, A
V
= 26dB, f
PWM
= 360kHz, SSM Mode, V
PLIMIT
= V
GVDD
, both channels driven (BTL Mode),
unless otherwise specified.
THD+N vs. Input Frequency
Efficiency vs. Output Power
Efficiency vs. Output Power
Efficiency vs. Output Power
PSRR vs. Input Frequency
PSRR vs. Input Frequency
0.001
0.01
0.1
1
10
10 100 1000 10000 100000
THD+N (%)
Input Frequency (Hz)
V
DD
= 12V, R
L
= 4Ω + 33μH, P
O
= 5W/CH
SSM Mode
DSM Mode
0
20
40
60
80
100
0 5 10 15 20 25 30 35 40
Efficiency (%)
Output Power (W/CH)
V
DD
= 6V, R
L
= 8Ω + 33μH
V
DD
= 12V, R
L
= 8Ω + 33μH
V
DD
= 18V, R
L
= 8Ω + 33μH
V
DD
= 24V, R
L
= 8Ω + 33μH
Non-ALC Mode
0
20
40
60
80
100
0 10 20 30 40
Efficiency (%)
Output Power (W/CH)
V
DD
= 6V, R
L
= 4Ω + 33μH
V
DD
= 12V, R
L
= 4Ω + 33μH
V
DD
= 18V, R
L
= 4Ω + 33μH
Non-ALC Mode
0
20
40
60
80
100
0 10 20 30 40 50 60
Efficiency (%)
Output Power (W)
V
DD
= 12V, R
L
= 3Ω + 15μH
V
DD
= 18V, R
L
= 3Ω + 15μH
Non-ALC Mode, PBTL Mode
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
10 100 1000 10000 100000
PSRR (dB)
Frequency (Hz)
SSM Mode
DSM Mode
V
DD
= 12V, R
L
= 4Ω + 33μH, Inputs AC-Grounded
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
10 100 1000 10000 100000
PSRR (dB)
Frequency (Hz)
SSM Mode, PBTL Mode
DSM Mode, PBTL Mode
V
DD
= 12V, R
L
= 3Ω + 15μH, Inputs AC-Grounded