LM4849 Datasheet | National Semiconductor

Description The LM4849 is a monolithic integrated circuit that provides DC volume control, and stereo bridged audio power amplifiers capable of producing 2W into 4Ω (Note 1) with less than 1.0% THD+N, or 2.2W into 3Ω (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 ponents. 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 puter 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 4Ω. 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 3Ω. Key Specifications j PO at 1% THD+N into 3Ω (Note2) into 4Ω (Note1) into 8Ω j Single-ended mode - THD+N at 85m W 2.2W (typ) 2.0W (typ) 1.1W (typ) 1.0% (typ) 0.2µA (typ) into 32Ω j Shutdown Current Features n n n n n DC Volume Control Interface Input mux Stereo switchable bridged/single-ended power amplifiers “Click and pop” suppression circuitry Thermal shutdown protection circuitry Applications n Portable and Desktop puters n Multimedia, LCD Monitors/TV n Portable Radios, PDAs, and Portable TVs Connection Diagram TSSOP Package Top View Order Number LM4849MH See NS Package Number MXA28A for Exposed-DAP TSSOP Boomer ® is a registered trademark of National Semiconductor Corporation. © 2003 National Semiconductor Corporation DS200767 .national. Absolute Maximum Ratings (Note 10) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/...