On Semi 公司的NCP2830是1W無濾波器D類音頻放大器, 為8.0歐姆(Ω)橋接負載(BTL)提供連續的高質量音頻輸出，即使輸入電壓變化，總諧波失真(THD)都低于1%. NCP2830的工作電源電壓介于2.7伏(V)與5.5 V，提供200微秒的(µS)的快速啟動時間以及-88分貝(dB)的優異電源紋波抑制比(PSRR)。總能效高達89%，并提供100 dB信噪比(SNR)的低噪聲性能,主要應用在手機和數碼相機,PDA和PMP以及音頻配件與GPS.本文介紹了NCP2830的主要特性,方框圖,典型應用電路以及差分與單端配置框圖.
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應用:
Cellular Phones and Digital Cameras
Personal Digital Assistant and Portable Media Player
Audio Accessories
GPS
圖1.NCP2830功能方框圖
圖2.NCP2830典型應用電路
圖3.NCP2830全差分配置圖
圖4.NCP2830單端配置圖
我司長期致力于D類音頻功放IC的推廣銷售，詳細的產品資料請查閱：http://www.wujiu5zhuce.cn/product_1012.htm |
