LM4992 - Texas Instruments

LM4992 420mW Stereo Cell Phone Audio Amplifier

The LM4992 is a stereo audio power amplifier primarily designed for demanding applications in mobile phones and other portable communication device applications. It is capable of delivering 1 watt, per channel, 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 desig.

Features

1
•2 Available in Space-Saving WSON Package
• Ultra Low Current Shutdown Mode
• BTL Output Can Drive Capacitive Loads
• Improved Click and Pop Circuitry Eliminates Noise During Turn-On and Turn-Off Transitions
• 2.2 - 5.5V Operation
• No Output Coupling Capacitors, Snubber Networks or Bootstrap Capacitors Required
• Unity-Gain Stable
• External Gain Configuration Capability APPLICATIONS
• Mobile Phones
• PDAs
• Portable Electronic Devices KEY SPECIFICATIONS
• Improved PSRR at 217Hz & 1KHz: 64 dB (1KHz)
• Stereo Output Power at 5.0V, 1% THD, 8Ω: 1.07 W (typ)
• Stereo Output Power at 3.3V, 1% TH.