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LM4846TL bảng dữ liệu(PDF) 1 Page - National Semiconductor (TI) |
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LM4846TL bảng dữ liệu(HTML) 1 Page - National Semiconductor (TI) |
1 / 19 page LM4846 Output Capacitor-less Audio Subsystem with Programmable National 3D General Description The LM4846 is an audio power amplifier capable of deliver- ing 500mW of continuous average power into a mono 8 Ω bridged-tied load (BTL) with 1% THD+N, 25mW per channel of continuous average power into stereo 32 Ω single-ended (SE) loads with 1% THD+N, or an output capacitor-less (OCL) configuration with identical specification as the SE configuration, from a 3.3V power supply. The LM4846 features a 32-step digital volume control and eight distinct output modes. The digital volume control, 3D enhancement, and output modes (mono/SE/OCL) are pro- grammed through a two-wire I 2C or a three-wire SPI com- patible interface that allows flexibility in routing and mixing audio channels. The LM4846 has three input channels: one pair for a two-channel stereo signal and the third for a single-channel mono input. The LM4846 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 in the OCL mode (two additional components in SE mode). Key Specifications j THD+N at 1kHz, 500mW into 8 Ω BTL (3.3V) 1.0% (typ) j THD+N at 1kHz, 30mW into 32 Ω SE (3.3V) 1.0% (typ) j Single Supply Operation (VDD) 2.7 to 5.5V j I 2C/SPI Single Supply Operation 2.2 to 5.5V Features n I 2C/SPI Control Interface n I 2C/SPI programmable National 3D Audio n I 2C/SPI controlled 32 step digital volume control (-54dB to +18dB) n Three independent volume channels (Left, Right, Mono) n Eight distinct output modes n microSMD 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 Boomer® is a registered trademark of National Semiconductor Corporation. December 2005 © 2005 National Semiconductor Corporation DS201668 www.national.com |
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