LM4889中文资料1W 音频功率放大器数据手册TI规格书

描述 Description

The LM4889 is an audio power amplifier primarily designed for demanding applications in mobile phones and other portable communication device applications. It is capable of delivering 1 watt of continuous average power to an 8Ω BTL load with less than 2% distortion (THD+N) from a 5VDC power supply.Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. The LM4889 does not require output coupling capacitors or bootstrap capacitors, and therefore is ideally suited for mobile phone and other low voltage applications where minimal power consumption is a primary requirement.The LM4889 features a low-power consumption shutdown mode, which is achieved by driving the shutdown pin with a logic low. Additionally, the LM4889 features an internal thermal shutdown protection mechanism.The LM4889 contains advanced pop & click circuitry to eliminate noise which would otherwise occur during turn-on and turn-off transitions. The LM4889 is unity-gain stable and can be configured by external gain-setting resistors.

特性 Features

• Available in Space-Saving VSSOP, SOIC, WSON, and DSBGA Packages
• Can Drive Capacitive Loads up to 500 pF
• 2.2 - 5.5V Operation
• Unity-Gain Stable
• Improved PSRR at 217Hz, 5 - 3.3V 75dB
• Power Output at 3.3V & 1% THD 400mW(typ.)
• Shutdown Current at 3.3 & 2.6V 0.01µA(typ.)