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LM4844

National Semiconductor
Part Number LM4844
Manufacturer National Semiconductor
Description Stereo 1.2W Audio Sub-System
Published Apr 25, 2010
Detailed Description LM4844 Stereo 1.2W Audio Sub-System with 3D Enhancement www.DataSheet4U.com August 2007 LM4844 Stereo 1.2W Audio Sub-...
Datasheet PDF File LM4844 PDF File

LM4844
LM4844

Overview
LM4844 Stereo 1.
2W Audio Sub-System with 3D Enhancement www.
DataSheet4U.
com August 2007 LM4844 Stereo 1.
2W Audio Sub-System with 3D Enhancement General Description The LM4844 is an integrated audio sub-system designed for stereo cell phone applications.
Operating on a 3.
3V supply, it combines a stereo speaker amplifier delivering 495mW per channel into an 8Ω load and a stereo OCL headphone amplifier delivering 33mW per channel into a 32Ω load.
It integrates the audio amplifiers, volume control, mixer, power management control, and National 3D enhancement all into a single package.
In addition, the LM4844 routes and mixes the stereo and mono inputs into 10 distinct output modes.
The LM4844 is controlled through an I2C compatible interface.
Boomer audio power amplifiers are designed specifically to provide high quality output power with a minimal amount of external components.
The LM4844 is available in a very small 2.
5mm x 2.
9mm 30bump micro SMD (TL) package.
Features ■ ■ ■ ■ ■ ■ ■ ■ Stereo speaker amplifier Stereo OCL headphone amplifier Independent Left, Right, and Mono volume controls National 3D enhancement I2C compatible interface Ultra low shutdown current Click and Pop Suppression circuit 10 distinct output modes Applications ■ ■ ■ ■ ■ Cell Phones PDAs Portable Gaming Devices Internet Appliances Portable DVD, CD, AAC, and MP3 Players Key Specifications ■ POUT, Stereo BTL, 8Ω, 3.
3V, 1% THD+N 495mW (typ) 33mW (typ) 0.
1μA (typ) ■ POUT HP, 32Ω, 3.
3V, 1% THD+N ■ Shutdown Current, 3.
3V Boomer® is a registered trademark of National Semiconductor Corporation.
© 2007 National Semiconductor Corporation 201535 www.
national.
com LM4844 Block Diagram www.
DataSheet4U.
com 20153531 FIGURE 1.
Audio Sub-System Block Diagram www.
national.
com 2 LM4844 Connection Diagrams 30 Bump Micro SMD (TL) Package www.
DataSheet4U.
com 20153508 Top View (Bump-side down) Order Number LM4844TL See NS Package Number TLA30CZA Micro SMD (TL) Marking 20153592 Top View XY = 2 ...


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