LM4857

LM4857 www.ti.com SNAS229I – OCTOBER 2003 – REVISED APRIL 2013 LM4857 Stereo 1.2W Audio Sub-system with 3D Enhancement Check for Samples: LM4857 FEATURES 1 2 Stereo Speaker Amplifier Stereo Headphone Amplifier Mono Earpiece Amplifier Mono Line Output for External Handsfree Carkit Independent Left, Right, and Mono Volume Controls TI 3D Enhancement I2C Compatible Interface Ultra low Shutdown Current Click and Pop Suppression Circuit 16 distinct Output Modes Thermal Shutdown Protection Available in DSBGA and UQFN packages KEY SPECIFICATIONS POUT, Stereo Loudspeakers, 4Ω, 5V, 1% THD+N (LM4857SP) 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, Mono Earpiece, 32Ω, 5V, 1% THD+N 100mW (typ) POUT, Stereo Loudspeakers, 8Ω, 3.3V, 1% THD+N 495mW (typ) POUT, Stereo Headphones, 32Ω, 3.3V, 1% THD+N 33mW (typ) POUT, Mono Earpiece, 32Ω, 3.3V, 1% THD+N 43mW (typ) Shutdown Current 0.06μA (typ) APPLICATIONS Cell Phones PDAs Portable Gaming Devices Internet Appliances Portable DVD/CD/AAC/MP3 players DESCRIPTION The LM4857 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, a stereo headphone amplifier delivering 33mW per channel into a 32Ω load, a mono earpiece amplifier delivering 43mW into a 32Ω load, and a line output for a...