The SGM2820 is a high efficiency, low EMI, filterless, Class-D audio amplifier with auto-recovering short-circuit protection. It operates from 2.5V to 5.5V supply voltage for 8Ω load. When powered with 5.0V supply voltage, the SGM2820 is capable of delivering 1.7W into an 8Ω load, with 10% THD+N.
As a Class-D audio amplifier, the SGM2820 features 88% efficiency and 70dB PSRR at 217Hz which make the device ideal for battery-powered high-quality audio applications.
A key benefit of the SGM2820 over typical Class-D audio power amplifiers is that it generates much less EMI emissions, thus greatly simplifying the system design for portable applications. The device includes the over-current and short-circuit protections with auto-recovery, which ensures the device can be operated safely and reliably without system interaction.
Supply Voltage Range:
2.5V to 5.5V for 8Ω Load
2.5V to 4.5V for 4Ω Load
Filterless Class-D Operation
High Efficiency up to 88%
Typical Output Powery：
2.4W (VDD = 4.5V, 4Ω Load, THD+N = 10%)
1.7W (VDD = 5V, 8Ω Load, THD+N = 10%)
1.5W (VDD = 3.6V, 4Ω Load, THD+N = 10%)
0.88W (VDD = 3.6V, 8Ω Load, THD+N = 10%)
Low THD+N: 0.03% (VDD = 3.6V, f = 1kHz, RL = 8Ω, PO = 0.5W)
Low Quiescent Current: 2.1mA at VDD = 3.6V
Maximum Gain: 24dB (15.9V/V)
Low Shutdown Current: 0.1μA
High PSRR: 70dB at 217Hz
No Bypass Capacitor Required for the Common-Mode Bias
Under-Voltage Lockout
Auto-Recovering Over-Current and Short-Circuit Protections
Thermal Overload Protection
Low EMI Design
Available in Green UTQFN-1.5×1.5-9L and MSOP-8 Packages
Mobile Phones
Portable Navigation Devices
Multimedia Internet Devices
Portable Speakers
