LM4898

LM4898, LM4898MMBD www.ti.com SNAS216E – MAY 2003 – REVISED APRIL 2013 LM4898 1 Watt Fully Differential Audio Power Amplifier With Shutdown Select Check for Samples: LM4898, LM4898MMBD FEATURES 1 2 Fully Differential Amplification Available in Space-Saving Packages DSBGA, VSSOP, and WSON Ultra Low Current Shutdown Mode Can Drive Capacitive Loads up to 500pF Improved Pop and Click Circuitry Eliminates Noises During Turn-On and Turn-Off Transitions 2.4 - 5.5V Operation No Output Coupling Capacitors, Snubber Networks or Bootstrap Capacitors Required Shutdown High or Low Selectivity APPLICATIONS Mobile Phones PDAs Portable Electronic Devices KEY SPECIFICATIONS Improved PSRR at 217Hz: 83 dB(typ) Power Output at 5.0V, 1% THD: 1.0 W(typ) Power Output at 3.3V, 1% THD: 400 mW(typ) Shutdown Current: 0.1µA(typ) DESCRIPTION The LM4898 is a fully differential audio power amplifier primarily designed for demanding applications in mobile phones and other portable communication device applications. It is capable of delivering 1 watt of continuous average power to an 8Ω BTL load with less than 1% distortion (THD+N) from a 5VDC power supply. Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. The LM4898 does not require output coupling capacitors or bootstrap capacitors, and therefore is ideally suited for mobile phone and other low voltage applications where minimal power...