Part # LM4663 datasheet

Part Manufacturer: National Semiconductor

National Semiconductor

Part Description: LM4663 Boomer ® Audio Power Amplifier Series 2 Watt Stereo Class D Audio Power Amplifier with Stereo Headphone Amplifier


Part Details:

LM4663 April 2006 2 LM4663 Watt 2 Watt Stereo Class D Audio Power Amplifier with StereoHeadphone Amplifier Stereo General Description n Efficiency at 2 Watt into 4 83% (typ) n Efficiency at 250mW into 4 69% (typ) The LM4663 is a fully integrated single supply, high effi- n Total quiescent power supply current 22mA (typ) ciency Class D audio power amplifier solution. The LM4663 Class utilizes a continuous time delta-sigma modulation technique n Total shutdown power supply current 2µA (typ) that lowers output noise and THD when compared to con- n THD+N 1kHz, 20mW, 32 (Headphone) 0.15% (typ) ventional pulse width modulators. n Single supply range 4.5V to 5.5V The LM4663 also features a stereo headphone amplifier that D delivers 80mW into a 32 headset with less than 0.5% THD. Features The LM4663 has two stereo inputs that can be selected to Audio n Delta-sigma modulator. drive either the headphone amplifier or the Class D amplifier. n Two stereo input selector. All amplifiers are protected with thermal shutdown. n "Click and pop" suppression circuitry. In standby mode, the LM4663 draws an extremely low 2µA n Micropower shutdown mode. supply current. With a 4 load, the IC s efficiency for a Power n 24 lead TSSOP package (No heatsink required). 250mW power level is 69%, reaching 83% at a power level n Stereo headphone amplifier. of 2W. The IC features click and pop reduction circuitry thatminimizes audible popping during device turn-on and turn-off. The LM4663 is available in a 24-lead TSSOP package, Applications ideal for portable and desktop computer applications. n Portable computers Amplifier n Desktop computers Key Specifications n Multimedia Monitors n P at THD+N = 1% 2.1W (typ)


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LM4663.pdf Datasheet