LM4852

LM4852 Integrated Audio Amplifier System May 2004 LM4852 Integrated Audio Amplifier System General Description The LM4852 is an audio power amplifier system capable of delivering 1.1W (typ) of continuous average power into a mono 8Ω bridged-tied load (BTL) with 1% THD+N and 60mW (typ) per channel of continuous average power into stereo 32Ω single-ended (SE) loads with 0.5% THD+N, using a 5V power supply. The LM4852 features a 32 step digital volume control and eight distinct output modes. The digital volume control and output modes are programmed through a two-wire I2C compatible control interface, that allows flexibility in routing and mixing audio channels. The LM4852 has 3 channels: one pair for a two-channel stereo signal and the third for a single-channel mono input. The LM4852 is designed for cellular phone, PDA, and other portable handheld applications. It delivers high quality output power from a surface-mount package and requires only seven external components. The industry leading micro SMD package only utilizes 2mm x 2.3mm of PCB space, making the LM4852 the most space efficient audio sub system available today. Key Specifications n THD+N at 1kHz, 1.1W into 8Ω BTL n THD+N at 1kHz, 60mW into 32Ω SE n Single Supply Operation 1.0% (typ) 0.5% (typ) 2.6 to 5.0V Features n 1.1W (typ) output power with 8Ω mono BTL load n 60mW (typ) output power with stereo 32Ω SE loads n I2C programmable 32 step digital volume control (-40.5dB to +6dB) n Eight distinct output modes n ...