Datasheet > SGM4890YMS/TR

SGM4890YMS/TR

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
圣邦微 - SGMICRO		放大器功率放大器
页数	文件大小	规格书
9页	325K
描述
1.1 Watt Audio Power Amplifier

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SGM4890YMS/TR 数据手册

1.1 Watt Audio Power Amplifier

SGM4890

GENERAL DESCRIPTION

FEATURES

• Ideal for Notebook Computers, PDAs, and

Other Small Portable Audio Devices

• 1.1W to 8-Ω BTL Load from 5V Supply at

THD =1% (Typical)

• Excellent PSRR: Direct Connection to the Battery

• Fast Turn On Time

• Unity Gain Stable

• 2.5V to 5.5V Operation

• Shutdown Current: 0.01µA Typical

• Shutdown Pin is Compatible with 1.8V Logic

• –40℃ to +85℃ Operating Temperature Range

• Small Packaging

The SGM4890 is a 1.1-W, fully integrated, audio power

amplifier. It is designed to maximize audio performance

in portable applications such as mobile phone. The

portable application requires audio power amplifier has

minimum of external components and can operate from

a single 2.5V to 5.5V power supply. SGM4890 is capable

of delivering 1.1W of continuous output power with less

than 1% distortion（THD + N）when it drives an 8Ω

speaker from a 5.0V power supply.

The SGM4890 features

a low-power consumption

shutdown mode, which is achieved by driving the

shutdown pin with a logic low. Additionally, the

SGM4890 features an internal thermal shutdown

protection mechanism.

The SGM4890 does not require output coupling

capacitors or bootstrap capacitors, and therefore is

ideally suited for mobile phone and other low voltage

applications where minimal power consumption is a

primary requirement.

PIN CONFIGURATIONS (Top View)

-IN

V_O1

GND

V_O2

+IN

V₊

For maximum flexibility, the SGM4890 provides an

externally controlled gain (with resistors), as well as an

externally controlled turn-on time (with the bypass

capacitor). When using a 1µF bypass capacitor, it offers

110ms wake up time when V+ is equal to 5.0V.

GND

Bypass

SHDN

The SGM4890 is available in CSP-9 and MSOP-8

packages. It operates over an ambient temperature range

of –40℃ to +85℃.

CSP-9

APPLICATIONS

Portable Systems

MP3 Players

Mobile Phone

PDAs

V_O2

SHDN

Bypass

+IN

GND

V₊

GPS

V_O1

-IN

MSOP-8

SG Microelectronics Co, Ltd

Tel: 86/10/51798160/80

www.sg-micro.com

REV. A

12 3 4 5 6 7...9

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