LM4927 Datasheet | Texas Instruments

FEATURES - 23 Fully Differential Amplification - Available in Space-Saving Micro-Array WSON Package - Ultra Low Current Shutdown Mode - Can Drive Capacitive Loads up to 100p F - Improved Pop & 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 APPLICATIONS - Mobile Phones - PDAs - Portable Electronic Devices KEY SPECIFICATIONS - Improved PSRR at 217Hz, 85d B (Typ) - Power Output at 5.0V @ 10% THD (4Ω), 2.5W (Typ) - Power Output at 3.3V @ 1% THD, 550m W (Typ) - Shutdown Current, 0.1µA (Typ) DESCRIPTION The LM4927 is a fully differential audio power amplifier primarily designed for demanding applications in mobile phones and other portable munication device applications. It is capable of delivering 2.5 watts of continuous average power to a 4Ω load with less than 10% 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 ponents. The LM4927 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 consumption is a primary requirement. The LM4927 features a low-power consumption shutdown mode. To facilitate this, Shutdown may be enabled by logic low. Additionally, the LM4927 features an internal thermal shutdown protection mechanism. The LM4927 contains advanced pop & click circuitry which eliminates noises which would otherwise occur during turn-on and turn-off transitions. Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. Boomer is a trademark of Texas Instruments. All other trademarks are the property of their respective...