Datasheet > SGM2820

SGM2820

更新时间： 2024-03-03 10:11:39

品牌	Logo	应用领域
圣邦微 - SGMICRO		/
页数	文件大小	规格书
20页	850K
描述
3W Low EMI Class-D Audio Power Amplifier with Auto-Recovering Short-Circuit Protection

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SGM2820 数据手册

SGM2820

3W Low EMI Class-D Audio Power Amplifier

with Auto-Recovering Short-Circuit Protection

GENERAL DESCRIPTION

FEATURES

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.

When powered with 5V supply voltage, the SGM2820

is capable of delivering 3W into a 4Ω load or 1.7W into

an 8Ω load, with 10% THD+N.

• Filterless Class-D Operation

• High Efficiency up to 88%

• Maximum Output Power at 5V Supply

 3.0W (4Ω Load, THD+N = 10%)

 1.7W (8Ω Load, THD+N = 10%)

• Maximum Output Power at 3.6V Supply

 1.5W (4Ω Load, THD+N = 10%)

 0.88W (8Ω Load, THD+N = 10%)

• Low THD+N: 0.03% (V_DD= 3.6V, f = 1kHz, R_L= 8Ω,

P_O= 0.5W)

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.

• Low Quiescent Current: 2.1mA at V_DD= 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

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.

• Under-Voltage Lockout

• Auto-Recovering Over-Current and Short-Circuit

Protections

APPLICATIONS

• Thermal Overload Protection

• Low EMI Design

Mobile Phones

• Available in Green UTQFN-1.5×1.5-9L and

MSOP-8 Packages

Portable Navigation Devices

Multimedia Internet Devices

Portable Speakers

TYPICAL APPLICATION

To Battery

C_S

C_I

VDD/PVDD

C_I

VDD/PVDD

R_I

INN

INP

INN

INP

INN

INP

VON

Differential Input

Single-ended Input

SGM2820

R_I

VOP

C_I

SHDN

GND/PGND

SHDN

GND/PGND

OFF

Figure 1. Typical Application Circuits

SG Micro Corp

www.sg-micro.com

OCTOBER 2023 – REV. A. 1

12 3 4 5 6 7...20

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