SG Micro SGM4703 - Page 9

High-Power Stereo Class-D Audio Power Amplifier
SGM4703 with Adjustable Power Limit and Automatic Level Control
9
DECEMBER 2022
SG Micro Corp
www.sg-micro.com
ELECTRICAL CHARACTERISTICS (continued)
(Minimum and Maximum values are at T
A
= -40℃ to +85℃, V
DD
= 12V, f = 1kHz, Load = 4Ω + 33µH, C
IN
= 4 × 1µF, R
INE
= 4 × 0Ω,
GAIN = NC (A
V
= 26dB), FREQ = NC (f
PWM
= 360kHz), MODS = NC (SSM), ALC shorted to GND (ALC-1), V
PLIMIT
= V
GVDD
, C
PVDD
=
2 × (10nF + 1μF + 220μF), C
AVDD
= 1µF, C
GVDD
= 1µF, C
B
= 4 × 0.1µF, both channels driven, typical values are measured at T
A
=
+25℃, unless otherwise specified.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Class-D Amplifier (V
DD
= 12V, R
L
= 4Ω + 33µH, Both Channels Driven)
Maximum Output Power P
O,MAX
THD+N = 1% 15 W/CH
ALC Output Power P
O,ALC
V
IN
= 0.50V
RMS
13 W/CH
Total Harmonic Distortion + Noise THD+N
P
O
= 1W/CH, Non-ALC Mode
SSM 0.04
%
DSM 0.02
P
O
= 10W/CH, Non-ALC Mode
SSM 0.02
DSM 0.02
V
IN
= 0.50V
RMS
, ALC Mode
SSM 0.3
DSM 0.3
Power Efficiency η
P
O
= 10W/CH, Non-ALC Mode 86
%
V
IN
= 0.50V
RMS
, ALC Mode 87
Output Offset Voltage V
OS
No Load ±20 mV
Idle-Channel Noise V
N
Inputs AC-Grounded, A-weighted 145 µV
RMS
Signal-to-Noise Ratio SNR Maximum Output (7V
RMS
), A-weighted 94 dB
Power Supply Rejection Ratio PSRR
SSM f = 1kHz 80
dB
DSM f = 1kHz 60
Common Mode Rejection Ratio CMRR f = 1kHz, V
IN
= 0.2V
RMS
60 dB
Channel Separation Crosstalk P
O
= 10W, f = 1kHz 85 dB
Maximum ALC Attenuation A
MAX
V
DD
= 12V 12
dB
V
DD
= 15V 10
V
DD
= 18V 8.5
Startup Time t
STARTUP
Including Fade-In Time 45 ms
Shutdown Settling Time t
SD
Including Fade-Out Time, T
A
= +25℃
10 ms
DC Current Protection (DCP)
DC-Detect Threshold V
DCP
V
DD
= 12V, Load = 4Ω + 33µH 2.4
V
V
DD
= 15V, Load = 4Ω + 33µH 3.0
V
DD
= 18V, Load = 4Ω + 33µH 3.6
Fade-In and Fade-Out
Fade-In Time t
FADEIN
8 ms
Fade-Out Time t
FADEOUT
5 ms