GENERAL DESCRIPTION The ft2011 is a high efficiency, low EMI, filterless, Class-D audio amplifier with auto-recovering short-circuit protection. It operates from 3V to 5.5V supply. When powered with 5V supply voltage, the ft2011 is capable of delivering 3W into a 4Ω load or 1.8W into an 8Ω load, with 10% THD + N. As a Class-D audio amplifier, the ft2011 features 90% efficiency and 75dB PSRR at 217Hz which make the device ideal for battery-powered high- quality audio applications. One of the key benefits of the ft2011 over typical Class-D audio power amplifiers is it generates much less EMI emissions, thus greatly simplifying the system design for portable applications. Also included is the over-current and short-circuit protection with auto-recovery, which ensures the device be operated safely and reliably without the need for system interaction. APPLICATIONS? Mobile Phones? Portable Navigation Devices? Multimedia Internet Devices? Portable Speakers FEATURES? Filterless Class-D operation? High efficiency up to 90% ? Maximum output power at 5V supply 3.0W (4Ω load, 10% THD + N) 1.8W (8Ω load, 10% THD + N)? Maximum output power at 3.6V supply 1.5W (4Ω load, 10% THD + N ) 0.9W (8Ω load, 10% THD + N) Low THD + N:? 0.05% (VDD = 3.6V, f = 1kHz, RL = 8Ω, PO = 0.5W) Low quiescent current:? 2mA @ VDD = 3.6 ? V Low shutdown current <0.1μA High PSRR:? 75dB @ 217Hz No bypass capacitor required for the common-mode bias Under-voltage lockout Auto-recovering over-current and short-circuit protection Thermal overload protection Low EMI????? design? Available in COL1.5x1.5-9L, SOP-8L, MSOP-8L, and DFN2x2-8L packages