LM48411

LM48411 www.ti.com SNAS399G – SEPTEMBER 2007 – REVISED MAY 2013 LM48411 Ultra-Low EMI, Filterless, 2.5W, Stereo, Class D Audio Power Amplifier with E2S Check for Samples: LM48411 FEATURES 1 2 E2S System Reduces EMI Preserving Audio Quality and Efficiency Output Short Circuit Protection Stereo Class D Operation No Output Filter Required for Inductive Loads Logic Selectable Gain Independent Shutdown Control Minimum External Components "Click and Pop" Suppression Circuitry Micro-Power Shutdown Mode Available in Space-Saving 0.5mm Pitch DSBGA Package APPLICATIONS Mobile Phones PDAs Portable Electronic Devices KEY SPECIFICATIONS Efficiency at 3.6V, 500mW into 8Ω Speaker: 87% (typ) Efficiency at 3.6V, 100mW into 8Ω Speaker: 80% (typ) Efficiency at 5V, 1W into 8Ω Speaker: 88% (typ) Quiescent Current, 3.6V Supply: 4.2mA (typ) Power Output at VDD = 5V RL = 4Ω, THD ≤ 10%: 2.5W (typ) Power Output at VDD = 5V RL = 8Ω, THD ≤ 10%: 1.5W (typ) Total Shutdown Power Supply Current: 0.01µA (typ) Single Supply Range: 2.4V to 5.5V DESCRIPTION The LM48411 is a single supply, high efficiency, 2.5W/channel Class D audio amplifier. The LM48411 features TI's Enhanced Emissions Suppression (E2S) system, that features a unique patent-pending ultra low EMI, spread spectrum, PWM architecture, that significantly reduces RF emissions while preserving audio quality and efficiency. The E2S system improves battery life, reduces external component count, board area...