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LM4856 Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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LM4856 Datasheet(HTML) 1 Page - National Semiconductor (TI) |
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1 / 23 page  LM4856 Integrated Audio Amplifier System General Description The LM4856 is an audio power amplifier system capable of delivering 1.1W (typ) of continuous average power into a mono 8 Ω bridged-tied load (BTL) with 1% THD+N and 60mW (typ) per channel of continuous average power into stereo 32 Ω single-ended (SE) loads with 0.5% THD+N, us- ing a 5V power supply. The LM4856 features a 32 step digital volume control and eight distinct output modes. The digital volume control and output modes are programmed through a two-wire I 2C com- patible control interface, that allows flexibility in routing and mixing audio channels. The LM4856 is designed for cellular phone, PDA, and other portable handheld applications. It delivers high quality output power from a surface-mount package and requires only eight external components. The industry leading micro SMD package only utilizes 2mm x 2.3mm of PCB space, making the LM4856 the most space efficient audio sub system available today. Key Specifications n THD+N at 1kHz, 1.1W into 8 Ω BTL 1.0% (typ) n THD+N at 1kHz, 60mW into 32 Ω SE 0.5% (typ) n Single Supply Operation 2.6 to 5.0V Features n 1.1W (typ) output power with 8 Ω mono BTL load n 60mW (typ) output power with stereo 32 Ω SE loads n I 2C programmable 32 step digital volume control n Eight distinct output modes n micro-SMD and LLP surface mount packaging n "Click and Pop" suppression circuitry n Thermal shutdown protection n Low shutdown current (0.1uA, typ) Applications n Moblie Phones n PDAs Typical Application Boomer® is a registered trademark of National Semiconductor Corporation. 20060732 FIGURE 1. Typical Audio Amplifier Application Circuit May 2004 © 2004 National Semiconductor Corporation DS200607 www.national.com |
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