SG Micro SGM4703 - Recommended Operating Conditions

High-Power Stereo Class-D Audio Power Amplifier
SGM4703 with Adjustable Power Limit and Automatic Level Control
3
DECEMBER 2022
SG Micro Corp
www.sg-micro.com
RECOMMENDED OPERATING CONDITIONS
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage Range
(1, 2)
V
DD
PVDD, AVDD 5 26 V
Operating Ambient Temperature T
A
-40 +85
℃
Minimum Load Impedance
(3)
R
L
BTL Configuration (Stereo) 4
Ω
PBTL Configuration (Mono) 3
Audio Input Capacitor C
IN
At INPL/R, INNL/R 1 µF
Maximum Audio Input Voltage Level V
IN, MAX
At INNL/R, INPL/R 2.0 V
RMS
PLIMIT Voltage Range V
PLIMIT
PLIMIT 0 V
GVDD
V
Maximum Load Current at GVDD I
LOAD
5 mA
Supply Decoupling Capacitor
C
PVDD
Ceramic 1
µF
Electrolytic or Tantalum
(4)
220
C
AVDD
Ceramic 1
C
GVDD
Ceramic 1
C
PLIMIT
Ceramic 0.1
Bootstrap Holding Capacitor C
B
At BSTPL/R, BSTNL/R 0.1 µF
Mono Mode Select
INNR
INPR
PBTL Configuration Both Pins Shorted to GND
Modulation Scheme Select MODS
Single-Side-Modulation (SSM) High or Open
Double-Side-Modulation (DSM) Low
Voltage Gain Select GAIN
26dB Open
30dB Shorted to GND
34dB 68kΩ to GND
20dB 300kΩ to GND
ALC Mode Select ALC
Non-ALC Open
ALC-1 Shorted to GND
ALC-2 68kΩ to GND
ALC-3 300kΩ to GND
PWM Frequency Select FREQ
Constant Frequency at 360kHz Open
360kHz with Spread-Spectrum Shorted to GND
Constant Frequency at 500kHz 68kΩ to GND
500kHz with Spread-Spectrum 300kΩ to GND
NOTES:
1. The peak supply voltage including its tolerance over various operating conditions must not exceed its absolute-maximum-rated value (26V).
Exposure to absolute-maximum-rated supply voltage may damage the device or affect device reliability permantly.
2. For high power applications, the maximum power supply V
DD
that can be applied to the SGM4703 is largely limited by the thermal dissipation
capability of the package and the system board layout.
3. The SGM4703 is specfied with an 8Ω resistive load in series with 33µH inductive load or with a 4Ω resistive load in series with 33µH inductive
load or with a 2Ω or 3Ω resistive load in series with 15µH inductive load (in PBTL configuration). Without inductive loads, the maximum continous
output power will severely suffer from efficiency and thermal degradation.
4. If the input supply is located more than a few centimeters from SGM4703, additional bulk capacitor may be required in addition to the ceramic
capacitors.