LM4917

LM4917 www.ti.com SNAS238G – AUGUST 2004 – REVISED MAY 2013 LM4917 Boomer™ Audio Power Amplifier Series Ground-Referenced, 95mW Stereo Headphone Amplifier Check for Samples: LM4917 FEATURES 1 23 Ground Referenced Outputs High PSRR Available in Space-Saving TSSOP Package Ultra Low Current Shutdown Mode Improved Pop and Click Circuitry eliminates Noises During Turn-On and Turn-Off Transitions 1.4 – 3.6V Operation No Output Coupling Capacitors, Snubber Networks, Bootstrap Capacitors Shutdown Either Channel Independently APPLICATIONS Notebook PCs Desktop PCs Mobile Phone PDAs Portable Electronic Devices KEY SPECIFICATIONS Improved PSRR at 1kHz: 70dB (Typ) Power Output at VDD = 3V, RL = 16Ω, THD ≦ 1%: 95mW (Typ) Shutdown Current: 0.01µA (Typ) DESCRIPTION The LM4917 is a stereo, output capacitor-less headphone amplifier capable of delivering 95mW of continuous average power into a 16Ω load with less than 1% THD+N from a single 3V power supply. The LM4917 provides high quality audio reproduction with minimal external components. A ground referenced output eliminates the output coupling capacitors typically required by single-ended loads, reducing component count, cost and board space consumption. This makes the LM4917 ideal for mobile phones and other portable equipment where board space is at a premium. Eliminating the output coupling capacitors also improves low frequency response. The LM4917 operates from a single 1.4V to 3.6V power supply, fea...