LM4819MBD Datasheet, PDF (1/27 Pages) Texas Instruments – 350mW Audio Power Amplifier with Shutdown Mode

LM4819, LM4819MBD
www.ti.com
SNAS133C – MAY 2004 – REVISED OCTOBER 2004
LM4819
350mW Audio Power Amplifier with Shutdown
Mode
Check for Samples: LM4819, LM4819MBD
FEATURES
1
•2 WSON, SOIC, and VSSOP Surface Mount
Packaging
• Switch On/Off Click Suppression
• Unity-Gain Stable
• Minimum External Components
APPLICATIONS
• General Purpose Audio
• Portable Electronic Devices
• Information Appliances (IA)
DESCRIPTION
The LM4819 is a mono bridged power amplifier that
is capable of delivering 350mW_RMS output power into
a 16Ω load or 300mW_RMS output power into an 8Ω
load with 10% THD+N from a 5V power supply.
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 WSON, VSSOP,
and SOIC package types to suit various applications.
Table 1. Key Specifications
THD+N at 1kHz, 350mW continuous average output power into 16Ω
THD+N at 1kHz, 300mW continuous average output power into 8Ω
Shutdown Current
VALUE
10
10
0.7
UNIT
% (max)
% (max)
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.
All trademarks are the property of their respective owners.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2004, Texas Instruments Incorporated