LM4675

www.DataSheet4U.com LM4675 Ultra-Low EMI, Filterless, 2.65W, Mono, Class D Audio Power Amplifier with Spread Spectrum August 2006 LM4675 Ultra-Low EMI, Filterless, 2.65W, Mono, Class D Audio Power Amplifier with Spread Spectrum General Description Key Specifications The LM4675 is a single supply, high efficiency, 2.65W, mono, j Efficiency at 3.6V, 400mW into 8Ω speaker 89% (typ) Class D audio amplifier. A spread spectrum, filterless PWM j Efficiency at 3.6V, 100mW into 8Ω speaker 80% (typ) architecture reduces EMI and eliminates the output filter, j Efficiency at 5V, 1W into 8Ω speaker 89% (typ) reducing external component count, board area consumption, system cost, and simplifying design. j Quiescent current, 3.6V supply 2.2mA (typ) The LM4675 is designed to meet the demands of mobile j Total shutdown power supply current 0.01µA (typ) phones and other portable communication devices. Operatj Single supply range 2.4V to 5.5V ing on a single 5V supply, it is capable of driving a 4Ω j PSRR, f = 217Hz 82dB speaker load at a continuous average output of 2.2W with less than 1% THD+N. Its flexible power supply requirements allow operation from 2.4V to 5.5V. The wide band spread Features spectrum architecture of the LM4675 reduces EMI-radiated n Spread spectrum architecture reduces EMI emissions due to the modulator frequency. n Mono Class D Operation The LM4675 has high efficiency with speaker loads comn No output filter required for inductive loads pared to a typical Class AB am...