LM4811 Datasheet | National Semiconductor

Description The LM4811 is a dual audio power amplifier capable of delivering 105m W per channel of continuous average power into a 16Ω load with 0.1% (THD+N) from a 5V power supply. Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external ponents. Since the LM4811 does not require bootstrap capacitors or snubber networks, it is optimally suited for low-power portable systems. The LM4811 features a digital volume control that sets the amplifier’s gain from +12d B to - 33d B in 16 discrete steps using a two- wire interface. The unity-gain stable LM4811 also features an externally controlled, active-high, micropower consumption shutdown mode. It also has an internal thermal shutdown protection mechanism. Key Specifications n THD+N at 1k Hz, 105m W continuous average output power into 16Ω 0.1% (typ) n THD+N at 1k Hz, 70m W continuous average power into 32Ω 0.1% (typ) n Shutdown Current 0.3µA (typ) Features n n n n n Digital volume control range from +12d B to - 33d B LD and MSOP surface mount packaging "Click and Pop" suppression circuitry No bootstrap capacitors required Low shutdown current Applications n n n n Cellular Phones MP3, CD, DVD players PDA’s Portable electronics Connection Diagrams MSOP Package LD Package Top View Order Number LM4811MM See NS Package Number MUB10A Top View Order Number LM4811LD See NS Package Number LDA10A Boomer ® is a registered trademark of National Semiconductor Corporation. © 2002 National Semiconductor Corporation DS200061 .national. Typical Application - Refer to the Application Information Section for information concerning proper selection of the input and output coupling capacitors. FIGURE 1. Typical Audio Amplifier Application Circuit .national. Absolute Maximum Ratings (Note 1) Infrared (15 sec.) Thermal Resistance θJA MUB10A θJC MUB10A θJA LDA10A (Note 7) θJC LDA10A (Note 7) 220˚C 194˚C/W 52˚C/W 63˚C/W...