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LM4852 Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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LM4852 Datasheet(HTML) 1 Page - National Semiconductor (TI) |
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1 / 21 page  LM4852 Integrated Audio Amplifier System General Description The LM4852 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 LM4852 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 LM4852 has 3 channels: one pair for a two-channel stereo signal and the third for a single-channel mono input. The LM4852 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 seven external components. The industry leading micro SMD package only utilizes 2mm x 2.3mm of PCB space, making the LM4852 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 (-40.5dB to +6dB) 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. 20060632 FIGURE 1. Typical Audio Amplifier Application Circuit May 2004 © 2004 National Semiconductor Corporation DS200606 www.national.com |
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