LM4839 Datasheet | National Semiconductor

Description The LM4839 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 LM4839 incorporates a DC volume control, stereo bridged audio power amplifiers, selectable gain or bass boost, and an input mux making it optimally suited for multimedia monitors, portable radios, desktop, and portable puter applications. The LM4839 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 LM4839LQ and LM4839MTE will deliver 2W into 4Ω. The LM4839MT will deliver 1.1W into 8Ω. See the Application Information section for LM4839LQ and LM4839MTE usage information. Note 2: An LM4839LQ and LM4839MTE that have been properly mounted to the circuit board and forced-air cooled will deliver 2.2W into 3Ω. Key Specifications n PO at 1% THD+N n into 3Ω (LQ & MTE) n into 4Ω (LQ & MTE) n into 8Ω (LM4839) (MT, MTE, & LQ) n Single-ended mode - THD+N at 85m W into 32Ω n Shutdown current 2.2W(typ) 2.0W(typ) 1.1W(typ) 1.0%(typ) 0.2µA(typ) Features n n n n n n n DC Volume Control Interface Input mux System Beep Detect Stereo switchable bridged/single-ended power amplifiers Selectable internal/external gain and bass boost “Click and pop” suppression circuitry Thermal shutdown protection circuitry Applications n Portable and Desktop puters n Multimedia Monitors n Portable Radios, PDAs, and Portable TVs Connection Diagrams LLP Package DS200134-83 Top View Order Number LM4839LQ See NS Package Number LQA028AA for Exposed-DAP LLP Boomer ® is a registered trademark of National Semiconductor Corporation. © 2002...