General Description
●The LM48901 is a quad Class D amplifier that utilizes Texas Instruments’ proprietary spatial sound processor to create an enhanced sound stage for portable multimedia devices. The Class D output stages feature Texas Instruments’ edge rate control (ERC) PWM architecture that significantly reduces RF emissions while preserving audio quality and efficiency. The LM48901’s flexible I2S interface is compatible with stan dard serial audio interfaces. A stereo differential-input ADC
●gives the device the ability to process analog stereo audio signals.
●Key Specifications
●■ SNR (A-Weighted) 87dBA (typ)
●■ Output Power/channel, PVDD = 5V
●RL = 8Ω, THD+N ≤10% 1.7W (typ)
●RL = 4Ω, THD+N ≤10% 2.8W (typ)
●■ THD+N 0.06% (typ)
●■ Efficiency/Channel 89% (typ)
●■ PSRR at 217Hz 71dB (typ)
●■ Shutdown current 1μA (typ)
●Features
●■ Spatial Sound Processing
●■ I2S Compatible Input
●■ Differential-Input Stereo ADC
●■ Edge Rate Control Reduces EMI while Preserving Audio Quality and Efficiency
●■ Paralleled Output Mode
●■ Short Circuit and Thermal Overload Protection
●■ Minimum external components
●■ Click and Pop suppression
●■ Micro-power shutdown
●■ Available in space-saving micro SMD and LLP packages
●Applications
●■ Laptops
●■ Tablets
●■ Desktop Computers
●■ Sound Bars
●■ Multimedia Devices
●■ MP3 Player Accessories
●■ Docking Stations
