Stereo 1.2W Audio Sub-system - Texas Instruments
Description
LM4859
www.
ti.
com
SNAS256E – MAY 2004 – REVISED MAY 2013
LM4859
Stereo 1.
2W Audio Sub-system with 3D Enhancement
Check for Samples: LM4859
FEATURES
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•2 Stereo Speaker Amplifier • Stereo Headphone Amplifier • Independent Left, Right, and Mono Volume
Controls • Texas Instruments 3D Enhancement • I2C Compatible Interface • Ultra Low Shutdown Current • Click and Pop Suppression Circuit • 10 Distinct Output Modes • Thermal Shutdown Protection • Available in DSBGA and UQFN packages
APPLICATIONS
• Cell Phones • PDAs • Portable Gaming Devices • Internet Appliances • Portable DVD/CD/AAC/MP3 Players
KEY SPECIFICATIONS
• POUT, Stereo Loudspeakers, 4Ω, 5V, 1% THD+N (LM4859SP), 1.
6W (Typ)
• POUT, Stereo Loudspeakers, 8Ω, 5V, 1% THD+N, 1.
2W (Typ)
• POUT, Stereo Headphones, 32Ω, 5V, 1% THD+N, 75mW (typ)
• POUT, Stereo Loudspeakers, 8Ω, 3.
3V, 1% THD+N, 495mW (typ)
• POUT, Stereo Headphones, 32Ω, 3.
3V, 1% THD+N, 33mW (typ)
• Shutdown Current, 0.
06μA (typ)
DESCRIPTION
The LM4859 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 headphone amplifier delivering 33mW per channel into a 32Ω load.
It integrates the audio amplifiers, volume control, mixer, power management control, and Texas Instruments 3D enhancement all into a single package.
In addition, the LM4859 routes and mixes the stereo and mono inputs into 10 distinct output modes.
The LM4859 is controlled through an I2C compatible interface.
Other features include an ultra-low current shutdown mode and thermal shutdown protection.
Boomer audio power amplifiers are designed specifically to provide high quality output power with a minimal amount of external components.
The LM4859 is available in a 30–bump TL package and a 28–lead UQFN package.
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas In...
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