LM4936 Datasheet | National Semiconductor

Description The LM4936 is a monolithic integrated circuit that provides volume control, and stereo bridged audio power amplifiers capable of producing 2W into 4Ω (Note 1) with less than 1% THD or 2.2W into 3Ω (Note 2) with less than 1% THD. Boomer ® audio integrated circuits were designed specifically to provide high quality audio while requiring a minimum amount of external ponents. The LM4936 incorporates a SPI or I2C Control Interface that runs the volume control, stereo bridged audio power amplifiers and a selectable gain or bass boost. All of the LM4936’s features (i.e. SD, Mode, Mute, Gain Sel) make it optimally suited for multimedia monitors, portable radios, desktop, and portable puter applications. The LM4936 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, LM4936MH will deliver 2W into 4Ω. See Application Information section Exposed-DAP package PCB Mounting Considerations for more information. Note 2: An LM4936MH that 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 n into 3Ω 2.2W (typ) n into 4Ω 2.0W (typ) n into 8Ω 1.25W (typ) n Single-ended mode - THD+N at 90m W into 32Ω 1%(typ) n Shutdown current 0.7µA (typ) Features n n n n n n n Selectable SPI or I2C Control Interface 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 Headphone Sense Applications n Portable and Desktop puters n Multimedia Monitors n Portable Radios, PDAs, and Portable TVs Connection Diagram TSSOP Package Top View Order Number LM4936MH See NS Package Number MXA28A for Exposed-DAP TSSOP Boomer ® is a registered trademark of National Semiconductor Corporation. © 2005 National...