10 Watt Stereo CLASS D Audio Power Amplifier With Stereo Headphone Amplifier And DC Volume Control

The LM4682 is a fully integrated single supply, high efficiency Audio Power Amplifier solution. The LM4682 utilizes a proprietary balanced pulse-width modulation technique that lowers output noise and THD and improves PSRR when compared to conventional pulse width Modulators
The LM4682 also features a stereo Headphone Amplifier that delivers 60mW into a 32 headset with less than 0.5% THD.
The LM4682 's DC Volume Control has a +30dB to -48dB range when speakers are driven and a range of +13dB to -65dB when Headphones are connected. All Amplifiers are protected by thermal shutdown. Additionally, all Amplifiers incorporate output current limiting function to protect their outputs from short circuit.
The LM4682 features a low-power consumption shutdown mode. And its efficiency reaches 85% for a 10W output power with an 8 load. External heatsink is not required when playing music. The IC features click and pop reduction circuitry that minimizes audible popping during device turn-on and turn-off. The LM4682 is available in a 48-lead LLP package, ideal for portable and desktop computer applications.
By National Semiconductor Corporation