Part # LM4838 datasheet

Part Manufacturer: National Semiconductor

National Semiconductor

Part Description: LM4838 Boomer ® Audio Power Amplifier Series Stereo 2W Audio Power Amplifiers with DC Volume Control and Selectable Gain


Part Details:

LM4838 November 2004 Stereo LM4838Stereo 2W Audio Power Amplifierswith DC Volume Control and Selectable Gain 2W General Description Key Specifications Audio The LM4838 is a monolithic integrated circuit that provides n P at 1% THD+N O DC volume control, and stereo bridged audio power amplifi- n into 3 (LQ & MTE) 2.2W (typ) ers capable of producing 2W into 4 (Note 1) with less than n into 4 (LQ, MTE, GR) 2.0W (typ) 1.0% THD or 2.2W into 3 (Note 2) with less than 1.0% n into 8 (MT, MTE, ITL, LQ, & GR) 1.1W (typ) Power THD. n Single-ended mode - THD+N at 85mW into Boomer® audio integrated circuits were designed specifically 32 1.0%(typ) to provide high quality audio while requiring a minimum n Shutdown current 0.7µA (typ) amount of external components. The LM4838 incorporates aDC volume control, stereo bridged audio power amplifiers Features Amplifiers and a selectable gain or bass boost, making it optimallysuited for multimedia monitors, portable radios, desktop, and n DC Volume Control Interface portable computer applications. n System Beep Detect The LM4838 features an externally controlled, low-power n Stereo switchable bridged/single-ended power amplifiers consumption shutdown mode, and both a power amplifier n Selectable internal/external gain and bass boost and headphone mute for maximum system flexibility and n "Click and pop" suppression circuitry performance. n Thermal shutdown protection circuitry with Note 1: When properly mounted to the circuit board, the LM4838LQ,LM4838MTE, and LM4838GR will deliver 2W into 4. The LM4838MT and Applications LM4838ITL will deliver 1.1W into 8. See Application Information sectionExposed-DAP package PCB Mounting Considerations for more informa- n Portable and Desktop Computers DC tion.


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LM4838.pdf Datasheet