LM4946
Description
The LM4946 is an audio power amplifier capable of delivering 540mW of continuous average power into a mono 8Ω bridged-tied load (BTL) with 1% THD+N, 35mW per channel of continuous average power into stereo 32Ω single-ended (SE) loads with 1% THD+N, or an output capacitor-less (OCL) configuration with identical specifications as the SE configuration, from a 3.3V power supply. The LM4946 has three input channels: one pair for a twochannel stereo signal and the third for a differential singlechannel mono input.
Key Features
- I2C/SPI programmable National 3D Audio
- I2C/SPI controlled 32 step digital volume control (-54dB to +18dB)
- Three independent volume channels (Left, Right, Mono)
- Eight distinct output modes
- LLP surface mount packaging n “Click and Pop” suppression circuitry
- Thermal shutdown protection
- Low shutdown current (0.02uA, typ)
- RF immunity topology
