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LM4936 Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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LM4936 Datasheet(HTML) 1 Page - National Semiconductor (TI) |
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1 / 28 page  LM4936 Stereo 2W Audio Power Amplifiers with Volume Control and Selectable Control Interface (SPI or I 2C) General Description The LM4936 is a monolithic integrated circuit that provides volume control, and stereo bridged audio power amplifiers capable of producing 2W into 4 Ω (Note 1) with less than 1% THD or 2.2W into 3 Ω (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 components. The LM4936 incorporates a SPI or I 2C 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 computer 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 4 Ω. 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 3 Ω. Key Specifications n P O at 1% THD+N n into 3 Ω 2.2W (typ) n into 4 Ω 2.0W (typ) n into 8 Ω 1.25W (typ) n Single-ended mode - THD+N at 90mW into 32 Ω 1%(typ) n Shutdown current 0.7µA (typ) Features n Selectable SPI or I 2C Control Interface n System Beep Detect n Stereo switchable bridged/single-ended power amplifiers n Selectable internal/external gain and bass boost n “Click and pop” suppression circuitry n Thermal shutdown protection circuitry n Headphone Sense Applications n Portable and Desktop Computers n Multimedia Monitors n Portable Radios, PDAs, and Portable TVs Connection Diagram TSSOP Package 20117802 Top View Order Number LM4936MH See NS Package Number MXA28A for Exposed-DAP TSSOP Boomer® is a registered trademark of NationalSemiconductor Corporation. April 2005 © 2005 National Semiconductor Corporation DS201178 www.national.com |
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