Part # LM4681 datasheet

Part Manufacturer: National Semiconductor

National Semiconductor

Part Description: LM4681 Boomer ® Audio Power Amplifier Series 10 Watt Stereo CLASS D Audio Power Amplifier with Stereo Headphone Amplifier a


Part Details:

I2C/SPI LM4681 March 2006 V 10 olume LM4681 W 10 Watt Stereo CLASS D Audio Power Amplifier with att Stereo Headphone Amplifier and I2C/SPI Volume Control Control Stereo General Description Key Specifications The LM4681 is a fully integrated single supply, CLASS D n P at THD+N =10%, A = 30dB, V = 14V 10W (typ) O V DD audio power amplifier solution. The LM4681 utilizes a pro- n THD+N at 1kHz at 1W into 8 (Power Amp) 0.43% (typ) prietary balanced pulse-width modulation technique that low- CLASS n Efficiency at 7W into 8 85% (min) ers output noise and THD and improves PSRR when com- n Total quiescent power supply current 50mA (typ) pared to conventional pulse width modulators. n THD+N 1kHz, 20mW, 32 (Headphone) 0.02% (typ) The LM4681 also features a stereo headphone amplifier that n Single supply range 9.0V to 15.5V delivers 80mW into a 32 headset with less than 0.5% THD.The LM4681 s I2C/SPI (selectable) volume control has a Features D +30dB to ­48dB range when speakers are driven and a n Pulse-width modulator. Audio range of +13dB to ­65dB when headphones are connected.All amplifiers are protected by thermal shutdown. Addition- n I2C/SPI (selectable) volume control ally, the high efficiency power amplifiers have output current n Stereo headphone amplifier. limit. n "Click and pop" suppression circuitry. With a 8 load, the IC s efficiency for a 6W power level is n Micropower shutdown mode. Power 85%. The IC features click and pop reduction circuitry that n 48 lead LLP package (No heatsink required).


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LM4681.pdf Datasheet