LM48312

LM48312 www.ti.com SNAS494D – JANUARY 2010 – REVISED MAY 2013 LM48312 Boomer™ Audio Power Amplifier Series 2.6W, Ultra-Low EMI, Filterless, Mono Class D Audio Power Amplifier with E2S Check for Samples: LM48312 FEATURES 1 23 Passes FCC Class B Radiated Emissions with 20 Inches of Cable E2S System Reduces EMI While Preserving Audio Quality and Efficiency Output Short Circuit Protection with AutoRecovery No Output Filter Required Improved Audio Quality Minimum External Components Five Logic Selectable Gain Settings (0, 3, 6, 9, 12dB) Low Power Shutdown Mode Click and Pop Suppression Available in Space-Saving DSBGA Package APPLICATIONS Mobile Phones PDAs Laptops KEY SPECIFICATIONS Efficiency at 3.6V, 400mW into 8Ω, 84% (Typ) Efficiency at 5V, 1W into 8Ω, 88% (Typ) Quiescent Power Supply Current at 5V, 3.1mA Power Output at VDD = 5V, RL = 4Ω – THD+N ≤ 10%, 2.6W (Typ) – THD+N ≤ 1%, 2.1W (Typ) Power Output at VDD = 5V, RL = 8Ω – THD+N ≤ 10%, 1.6W (Typ) – THD+N ≤ 1%, 1.3W (Typ) Shutdown Current, 0.01μA (Typ) DESCRIPTION The LM48312 is a single supply, high efficiency, mono, 2.6W, filterless switching audio amplifier. The LM48312 features TI’s Enhanced Emissions Suppression (E2S) system, that features a unique patented 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 consump...