LM4835 Datasheet | National Semiconductor

Description The LM4835 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 or 2.2W into 3Ω (Note 2) with less than 1.0% THD. Boomer ® audio integrated circuits were designed specifically to provide high quality audio while requiring a minimum amount of external ponents. The LM4835 incorporates a DC volume control, stereo bridged audio power amplifiers and a selectable gain or bass boost, making it optimally suited for multimedia monitors, portable radios, desktop, and portable puter applications. The LM4835 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 LM4835MTE will deliver 2W into 4Ω. The LM4835MT will deliver 1.1W into 8Ω. See the Application Information section for LM4835MTE usage information. Note 2: An LM4835MTE which has 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 into 3Ω (LM4835MTE) into 4Ω (LM4835MTE) into 8Ω (LM4835) 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) 0.7µA(typ) Features PC98 pliant DC Volume Control Interface System Beep Detect Stereo switchable bridged/single-ended power amplifiers Selectable internal/external gain and bass boost configurable n “Click and pop” suppression circuitry n Thermal shutdown protection circuitry n n n n n Applications n Portable and Desktop puters n Multimedia Monitors n Portable Radios, PDAs, and Portable TVs Block Diagram Connection Diagram TSSOP Package DS100139-2 DS100139-1 FIGURE 1. LM4835 Block Diagram Top View Order Number LM4835MT See NS Package Number MTC28 for TSSOP Order Number LM4835MTE See NS Package Number MXA28A for Exposed DAP TSSOP Boomer ® is a registered...