LM48310

LM48310 www.ti.com SNAS430D – NOVEMBER 2007 – REVISED MAY 2013 LM48310 Ultra-Low EMI, Filterless, 2.6W, Mono, Class D Audio Power Amplifier with E2S Check for Samples: LM48310 FEATURES 1 2 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 Stereo Class D Operation No Output Filter Required Internally Configured Gain (12dB) Synchronizable Oscillator for Multi-Channel Operation Low Power Shutdown Mode Minimum External Components "Click and Pop" Suppression Micro-Power Shutdown Available in Space-Saving WSON Package APPLICATIONS Mobile Phones PDAs Laptops KEY SPECIFICATIONS Efficiency at 3.6V, 400mW into 8Ω 85% (typ) Efficiency at 5V, 1W into 8Ω 88% (typ) Quiescent Power Supply Current at 5V 3.2mA Power Output at VDD = 5V, RL = 4Ω, THD+N ≤ 10% 2.6W (typ) Power Output at VDD = 5V, RL = 8Ω, THD+N ≤ 10% 1.6W (typ) Shutdown current0.01μA (typ) DESCRIPTION The LM48310 is a single supply, high efficiency, mono, 2.6W, filterless switching audio amplifier. The LM48310 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 consumption, system cost, and simp...