Datasheet > LM4890

LM4890

更新时间： 2024-03-03 10:11:34

品牌	Logo	应用领域
华冠 - HGSEMI		放大器音频放大器
页数	文件大小	规格书
13页	904K
描述
1.2W 音频放大器

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LM4890 数据手册

LM4890

1.2-Walts Mono Filter-free Audio Power Amplifier

Features



2.5-5.5V Operation Voltage

63dB PSRR at 217Hz, VDD=5V

0.1µA ultra low current shutdown mode

Improved pop & click circuitry

DIP-8

SOP-8

Unique Modulation Scheme Reduces EMI Emissions

0.1-µA Shutdown Current

No output coupling capacitors, snubber networks or bootstrap

capacitors required



External gain configuration capability

Shutdown Pin has 0.4V Compatible Thresholds

BTL output can drive capacitive loads

RoHS compliant and 100% lead(Pb)-free

MSOP-8

Applications



PMP,PSP, Game, Data-Bank

Cellular and Smart mobile phone

Ordering Information

DEVICE

LM4890N

Package Type

DIP-8

MARKING

LM4890

4890

Packing

TUBE

Packing Qty

2000/box

2500/reel

3000/reel

LM4890M/TR

LM4890MM/TR

SOP-8

REEL

MSOP-8

REEL

General Description

The LM4890 is an audio power amplifier designed for portable communication device applications such as

mobile phone applications. The LM4890 is capable of delivering 1.2W of continuous average power to an 8Ω

load and with less than 1% distortion (THD+N) from a 5.2V power supply, and 350mW to a 8Ω load from a 3V

power supply.

The LM4890 provides high quality audio while requiring few external components and minimal power

consumption. It features a low-power shutdown mode, which is achieved by driving the SHUTDOWN pin with

logic low.

The LM4890 contains circuitry to prevent from “pop and click” noise that would otherwise occur during

turn-on and turn-off transitions. For maximum flexibility, the LM4890 provides an externally controlled gain (with

resistors), as well as an externally controlled turn-on and turn-off times (with the bypass capacitor).

http://www.hgsemi.com.cn

2014 JUN

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