ad6255a esmt音頻功放ic

特點(diǎn)：

·兼容usb1.1和usb2.0 full speed
·內(nèi)建高效率、高性能d類立體聲音頻放大器
·支持的i2s輸入和i2s輸出接口模式。取樣頻率（fs）：48khz 
·+6 db增強(qiáng)（劇院模式）
·同時(shí)支持總線供電和自供電操作
·支持win me / 2000/xp/vista/win 7和mac os操作系統(tǒng)
·真正的即插即用，無需驅(qū)動程序的usb音箱方案
·支持音量/靜音控制與外部按鈕
·內(nèi)建5v轉(zhuǎn)3.3v穩(wěn)壓模塊
·總效率：80％8ω負(fù)載下- 1db，1khz正弦波輸入
·音箱psnr值和重低音dr值分別達(dá)到80db(psnr)和78db(dr)，采用磁珠濾波可達(dá)82db(psnr)，采用時(shí)鐘濾波可達(dá)78db(dr)。

·反流行設(shè)計(jì)
·過熱保護(hù)
·低電壓關(guān)斷
·短路偵測
·12 mhz晶振輸入
·32引腳lqfp封裝（無鉛）

綜述：

ad62550a是擁有usb/i2s接口的d類單芯片音頻功率放大器。當(dāng)使用usb端口電源，ad62550a可以驅(qū)動高達(dá)1w的喇叭，是高效率，高性能的d類功率放大器。它還具有一對i2s輸入端口和i2s輸出端口，i2s輸入端口允許外部音源共享d類放大器和喇叭。i2s的輸出端口允許接其它高性能音頻ic（如ad8356a/ad8256a），并由ad62550a控制。

features

·compliant with usb specification v1.1, and usb2.0 full speed

·embedded high efficiency, high performance classd stereo amplifier

·support i2s input and i2s output interface of master mode

sampling frequencies(fs)：48khz

·+6db enhancement(theater function)

·support both bus-powered and self-powered operation

·supports win me//2000/xp/vista/win 7 and macos

·true plug-and-play application, no driver is required for basic usb speaker application

·support volume/mute control with external button

·built-in 5v to 3.3v regulator for internal device operation

·total efficiency

80% for 8? load @ -1db 1khz sine wave input

·loudspeaker psnr & dr (a-weighting) 80db (psnr), 78db (dr) with bead filter 82db (psnr), 78db (dr) with chock filter

·anti-pop design

·over-temperature protection

·under-voltage shutdown

·short-circuit detection

·12 mhz crystal input

·32-pin lqfp(pb free)

description

ad62550a is a single chip of class-d audio amplifier with usb/i2s interface. when using the power supplied from the usb port, ad62550a can drive a pair of up to 1w speakers due to the built-in,high efficiency and high performance class d amplifiers. the device also has an i2s input port and i2s output port. the i2s input port allows other external audio sources to use the class d amplifier to share the speakers. the i2s output port allows other high performance audio device (i.e.ad8356a/ad8256a) to be controlled by ad62550a.