Part # LM4927 datasheet

Part Manufacturer: National Semiconductor

National Semiconductor

Part Description: LM4927 Boomer ® Audio Power Amplifier Series 2.5 Watt Fully Differential Audio Power Amplifier With Shutdown


Part Details:

LM4927 April 2006 2.5 LM4927 W 2.5 Watt Fully Differential Audio Power Amplifier With att Shutdown Fully General Description Key Specifications The LM4927 is a fully differential audio power amplifier j Improved PSRR at 217Hz 85dB (typ) primarily designed for demanding applications in mobile Differential phones and other portable communication device applica- j Power Output at 5.0V @ 10% THD (4) 2.5W (typ) tions. It is capable of delivering 2.5 watts of continuous j Power Output at 3.3V @ 1% THD 550mW (typ) average power to a 4 load with less than 10% distortion j Shutdown Current 0.1µA (typ) (THD+N) from a 5V power supply. DC Boomer audio power amplifiers were designed specifically toprovide high quality output power with a minimal amount of Features external components. The LM4927 does not require output n Fully differential amplification coupling capacitors or bootstrap capacitors, and therefore is n Available in space-saving micro-array LLP package Audio ideally suited for mobile phone and other low voltage appli- n Ultra low current shutdown mode cations where minimal power consumption is a primary re- n Can drive capacitive loads up to 100pF quirement. n Improved pop & click circuitry eliminates noises during The LM4927 features a low-power consumption shutdown turn-on and turn-off transitions Power mode. To facilitate this, Shutdown may be enabled by logic n 2.4 - 5.5V operation low. Additionally, the LM4927 features an internal thermalshutdown protection mechanism. n No output coupling capacitors, snubber networks or bootstrap capacitors required The LM4927 contains advanced pop & click circuitry whicheliminates noises which would otherwise occur during Applications Amplifier turn-on and turn-off transitions. n Mobile phones n PDAs


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LM4927.pdf Datasheet