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  • On Semi NCP2830 1W无滤波器D类音频放大方案
    http://www.ic72.com 发布时间:2009/10/15 15:35:08
        On Semi 公司的NCP2830是1W无滤波器D类音频放大器, 为8.0欧姆(?)桥接负载(BTL)提供连续的高质量音频输出,即使输入电压变化,总谐波失真(THD)都低于1%. NCP2830的工作电源电压介于2.7伏(V)与5.5 V,提供200微秒的(μS)的快速启动时间以及-88分贝(dB)的优异电源纹波抑制比(PSRR)。总能效高达89%,并提供100 dB信噪比(SNR)的低噪声性能,主要应用在手机和数码相机,PDA和PMP以及音频配件与GPS.本文介绍了NCP2830的主要特性,典型应用电路以及差分与单端配置.

        NCP2830 is a cost effective mono audio power amplifier designed for portable communication device applications such as mobile phones. Due to its integrated charge pump structure, this part is capable of delivering 1 W of continuous average power to an 8.0ohm Bridge Tied Load no matter the voltage provided by a lithium/Ion battery.

        NCP2830 is a preferred solution for long playback audio with minimum space required.Added to a fast start?up time of 200 us and a ?88dB PSRR, the NCP2830 audio power amplifier is specifically designed to provide high quality and level output power from low supply voltage, requiring very few external components.

        NCP2830主要特性:

        1 W to 8 _ load for VDD from 2.7 V up to 5.5 V

        High quality audio (THD+N = 0.04%)

        Low noise: SNR up to 100 dB

        Very Fast Turn On Time: 200 us

        Overall system efficiency optimization: up to 89%

        Superior PSRR (?88 dB): Direct Connection to Battery

        Very Low Quiescent Current 7 mA

        Optimized PWM Output Stage: Filterless Capability

        Selectable gain of 2 V/V or 4 V/V

        Fully Differential Capability:

        Thin QFN 3x3 mm, 20 pins

        This Device uses Halogen?Free Molding Compound

        This is a Pb?Free Device

        NCP2830应用:

        Cellular Phones and Digital Cameras

        Personal Digital Assistant and Portable Media Player

        Audio Accessories

        GPS


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