LM4819, LM4819MBD

www.ti.com

SNAS133C – MAY 2004 – REVISED OCTOBER 2004

LM4819

350mW Audio Power Amplifier with Shutdown

Mode

Check for Samples: LM4819, LM4819MBD

1

FEATURES

APPLICATIONS

2

•

LLP, SOP, and MSOP surface mount

•

General purpose audio

packaging.

•

Portable electronic devices

•

Switch on/off click suppression.

•

Information Appliances (IA)

•

Unity-gain stable.

•

Minimum external components.

DESCRIPTION

The LM4819 Boomer audio power amplifier is designed specifically to provide high quality output power and

minimize PCB area with surface mount packaging and a minimal amount of external components. Since the

LM4819 does not require output coupling capacitors, bootstrap capacitors or snubber networks, it is optimally

suited for low-power portable applications.

The closed loop response of the unity-gain stable LM4819 can be configured using external gain-setting

resistors. The device is available in LLP, MSOP, and SO package types to suit various applications.

Table 1. Key Specifications

VALUE

UNIT

THD+N at 1kHz, 350mW continuous average output power into 16

Ω

10% (max)

THD+N at 1kHz, 300mW continuous average output power into 8

Ω

10% (max)

Shutdown Current

0.7

µA (typ)

Typical Application

Figure 1. Typical Audio Amplifier Application Circuit

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Copyright © 2004, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.