DESCRIPTION
The LX1721/1722 is a monolithic high performance Class-D stereo controller IC designed for high efficiency or space constrained audio requirements such as portable or battery operated products, automotive amplifiers, and multi-channel multimedia computer and video game applications. This high frequency, full audio bandwidth switching power amplifier controller offers dramatically improved performance over Linfinity’s previous generation amplifier products. Enhancements include higher output power, better SNR, lower noise floor, and reduced THD. Combined with output power MOSFET’s and an output filter, the LX1721/1722 is a complete Class-D audio solution.

KEY FEATURES
◾ Integrated Switching Class-D Stereo Controller IC
◾ Full 20Hz-20kHz Audio Bandwidth
◾ High Fidelity (LX1721) Or High Power (LX1722) Versions Available
◾ Single Supply Operation
◾ THD+N <0.06% Typical (1Wrms, 1kHz, 4Ω)
◾ Maximum Efficiency 80%- 85%
◾ Output Power >60Wrms per Channel (LX1722, 4Ω, 1% THD+N)
◾ PSRR –70dB Typical
◾ Differential Input To Minimize Noise Effects
◾ Supports Multi-Channel Systems
◾ Complete LXE1721or LXE1722 Amplifier Evaluation Module Available
◾ 44-Pin QSOP Package

APPLICATIONS
◾ Multimedia Speakers
◾ Surround Sound Game Systems
◾ Notebook Computers
◾ Desktop Computers
◾ Automotive Amplifiers And Head units
◾ Battery Operated Equipment (Megaphone, Public Address System)
◾ Portable Audio (Boom Box)
◾ Wireless Speakers
◾ High Power Subwoofer
◾ Automotive Audio Systems
◾ Home Theatre