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LM4849 Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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LM4849 Datasheet(HTML) 1 Page - National Semiconductor (TI) |
1 / 19 page LM4849 Stereo 2W Audio Power Amplifiers with DC Volume Control and Input Mux General Description The LM4849 is a monolithic integrated circuit that provides DC volume control, and stereo bridged audio power amplifi- ers capable of producing 2W into 4 Ω (Note 1) with less than 1.0% THD+N, or 2.2W into 3 Ω (Note 2) with less than 1.0% THD+N. Boomer® audio integrated circuits were designed specifically to provide high quality audio while requiring a minimum amount of external components. The LM4849 incorporates a DC volume control, stereo bridged audio power amplifiers, and an input mux making it optimally suited for multimedia monitors, portable radios, desktop, and portable computer applications. The LM4849 features an externally controlled, low-power consumption shutdown mode, and both a power amplifier and headphone mute for maximum system flexibility and performance. Note 1: When properly mounted to the circuit board, the LM4849MH will deliver 2W into 4 Ω. See the Application Information section for LM4849MH usage information. Note 2: An LM4849MH that has been properly mounted to the circuit board and forced-air cooled will deliver 2.2W into 3 Ω. Key Specifications j PO at 1% THD+N into 3 Ω (Note2) 2.2W (typ) into 4 Ω (Note1) 2.0W (typ) into 8 Ω 1.1W (typ) j Single-ended mode - THD+N at 85mW into 32 Ω 1.0% (typ) j Shutdown Current 0.2µA (typ) Features n DC Volume Control Interface n Input mux n Stereo switchable bridged/single-ended power amplifiers n “Click and pop” suppression circuitry n Thermal shutdown protection circuitry Applications n Portable and Desktop Computers n Multimedia, LCD Monitors/TV n Portable Radios, PDAs, and Portable TVs Connection Diagram TSSOP Package 20076702 Top View Order Number LM4849MH See NS Package Number MXA28A for Exposed-DAP TSSOP Boomer® is a registered trademark of NationalSemiconductor Corporation. August 2003 © 2003 National Semiconductor Corporation DS200767 www.national.com |
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