LM4857中文资料具有 3D 增强功能和 16 种输出模式的 1.2W 立体声模拟输入 AB 类音频放大器数据手册TI规格书

描述 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 an external powered handsfree speaker. It integrates the audio amplifiers, volume control, mixer, power management control, and TI 3D enhancement all into a single package. In addition, the LM4857 routes and mixes the stereo and mono inputs into 16 distinct output modes. The LM4857 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 LM4857 is available in a 30-bump DSBGA package and a 28–lead UQFN package.

特性 Features

• Stereo Speaker Amplifier
• Mono Earpiece Amplifier
• Independent Left, Right, and Mono Volume Controls
• I2C Compatible Interface
• Click and Pop Suppression Circuit
• Thermal Shutdown Protection
• POUT, Stereo Loudspeakers, 4Ω, 5V, 1% THD+N (LM4857SP) 1.6W (typ)
• POUT, Stereo Headphones, 32Ω, 5V, 1% THD+N 75mW (typ)
• POUT, Stereo Loudspeakers, 8Ω, 3.3V, 1% THD+N 495mW (typ)
• POUT, Mono Earpiece, 32Ω, 3.3V, 1% THD+N 43mW (typ)
• Shutdown Current 0.06μA (typ)