LM4859 Datasheet | National Semiconductor

Description The LM4859 is an integrated audio sub-system designed for stereo cell phone applications. Operating on a 3.3V supply, it bines a stereo speaker amplifier delivering 495m W per channel into an 8Ω load and a stereo headphone amplifier delivering 33m W 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 LM4859 routes and mixes the stereo and mono inputs into 10 distinct output modes. The LM4859 is controlled through an I2C patible 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 ponents. The LM4859 is available in a 28- lead LLP package. Key Specifications j POUT, Stereo Loudspeakers, 4Ω, 5V, 1% THD+N (LM4859SP) j POUT, Stereo Loudspeakers, 8Ω, 5V, 1.6W (typ) 1.2W (typ) 75m W (typ) 495m W (typ) 33m W (typ) 0.06µA (typ) 1% THD+N j POUT, Stereo Headphones, 32Ω, 5V, 1% THD+N j POUT, Stereo Loudspeakers, 8Ω, 3.3V, 1% THD+N j POUT, Stereo Headphones, 32Ω, 3.3V, 1% THD+N j Shutdown Current Features n n n n n n n n n n Stereo speaker amplifier Stereo headphone amplifier Independent Left, Right, and Mono volume controls National 3D enhancement I2C patible interface Ultra low shutdown current Click and Pop Suppression circuit 10 distinct output modes Thermal Shutdown Protection Available in an LLP package Applications n n n n n Cell Phones PDAs Portable Gaming Devices Internet Appliances Portable DVD/CD/AAC/MP3 players Boomer ® is a registered trademark of National Semiconductor Corporation. © 2004 National Semiconductor Corporation DS201061 .national. Typical Application FIGURE 1. Typical Audio Amplifier Application Circuit .national. Connection Diagrams 30 Bump ITL Package micro SMD Marking Top View X -...