lJW5805A/B是(shi)(shi)(shi)(shi)(shi)一(yi)款集成（PD）和(he)DCDC變換器的(de)(de)(de)(de)(de)電(dian)(dian)(dian)源解決方(fang)案。它包含(han)了(le)一(yi)個PD接口和(he)一(yi)個隔離(li)式/非隔離(li)式反激變換器,完美PIN對(dui)美國芯源的(de)(de)(de)(de)(de)MP8004,MP8004是(shi)(shi)(shi)(shi)(shi)一(yi)款。PD接口包含(han)檢(jian)測、分類功能(neng)(neng),以(yi)(yi)(yi)及(ji)一(yi)個100V耐壓(ya)(ya)的(de)(de)(de)(de)(de)開(kai)關管。開(kai)關的(de)(de)(de)(de)(de)浪涌電(dian)(dian)(dian)流限制(zhi)功能(neng)(neng),可(ke)以(yi)(yi)(yi)緩慢地(di)給DCDC輸入(ru)電(dian)(dian)(dian)容充(chong)電(dian)(dian)(dian),是(shi)(shi)(shi)(shi)(shi)其(qi)不會因為芯片發(fa)(fa)(fa)熱而中(zhong)(zhong)(zhong)斷。DC/DC變換器包含(han)了(le)一(yi)個150V功率(lv)開(kai)關管,可(ke)高效轉換13W輸出(chu)(chu)功率(lv)。它具有內部(bu)軟(ruan)啟動和(he)自動重試功能(neng)(neng)。此外,具有過(guo)流保護(hu)、短路保護(hu)和(he)過(guo)壓(ya)(ya)保護(hu)功能(neng)(neng)。它還具有跳頻(pin)功能(neng)(neng),使其(qi)在(zai)輕載時(shi)也有很(hen)好的(de)(de)(de)(de)(de)負載調整率(lv)。在(zai)PoE系(xi)統(tong)(tong)中(zhong)(zhong)(zhong),提供(gong)(gong)電(dian)(dian)(dian)力(li)的(de)(de)(de)(de)(de)叫(jiao)做“供(gong)(gong)電(dian)(dian)(dian)設備”。隨著網(wang)(wang)絡的(de)(de)(de)(de)(de)發(fa)(fa)(fa)展(zhan),網(wang)(wang)絡設備越(yue)來(lai)越(yue)多。無論是(shi)(shi)(shi)(shi)(shi)買(mai)一(yi)臺(tai)*簡單的(de)(de)(de)(de)(de)五口Hub還是(shi)(shi)(shi)(shi)(shi)一(yi)套無線(xian)AP路由器,附件中(zhong)(zhong)(zhong)都(dou)會包括一(yi)個方(fang)頭方(fang)腦、傻大黑粗的(de)(de)(de)(de)(de)AC變電(dian)(dian)(dian)器。但是(shi)(shi)(shi)(shi)(shi)我(wo)們日常使用的(de)(de)(de)(de)(de)固定電(dian)(dian)(dian)話(hua)機(ji)(ji)卻不用,因為電(dian)(dian)(dian)話(hua)線(xian)本身是(shi)(shi)(shi)(shi)(shi)帶電(dian)(dian)(dian)的(de)(de)(de)(de)(de),足以(yi)(yi)(yi)支持(chi)話(hua)機(ji)(ji)的(de)(de)(de)(de)(de)功率(lv)需要。既(ji)然電(dian)(dian)(dian)話(hua)機(ji)(ji)的(de)(de)(de)(de)(de)例(li)子表明(ming)通(tong)過(guo)一(yi)條通(tong)訊線(xian)路同時(shi)供(gong)(gong)電(dian)(dian)(dian)是(shi)(shi)(shi)(shi)(shi)切(qie)實(shi)可(ke)行的(de)(de)(de)(de)(de)。由此PoE（以(yi)(yi)(yi)太(tai)網(wang)(wang)供(gong)(gong)電(dian)(dian)(dian)）技(ji)術應運而生。以(yi)(yi)(yi)太(tai)網(wang)(wang)供(gong)(gong)電(dian)(dian)(dian)技(ji)術的(de)(de)(de)(de)(de)出(chu)(chu)發(fa)(fa)(fa)點非常簡單,就(jiu)是(shi)(shi)(shi)(shi)(shi)讓IP電(dian)(dian)(dian)話(hua)、WLAN接入(ru)點、網(wang)(wang)絡攝像頭等(deng)小型網(wang)(wang)絡設備,可(ke)以(yi)(yi)(yi)直(zhi)接從以(yi)(yi)(yi)太(tai)網(wang)(wang)線(xian)（4對(dui)雙(shuang)絞線(xian)中(zhong)(zhong)(zhong)空(kong)閑的(de)(de)(de)(de)(de)2對(dui)來(lai)傳輸）獲得電(dian)(dian)(dian)力(li),無需單獨鋪設電(dian)(dian)(dian)力(li)線(xian),以(yi)(yi)(yi)簡化系(xi)統(tong)(tong)布線(xian)。在(zai)PoE系(xi)統(tong)(tong)中(zhong)(zhong)(zhong)。MAX5980是(shi)(shi)(shi)(shi)(shi)一(yi)款四(si)通(tong)路的(de)(de)(de)(de)(de)電(dian)(dian)(dian)源送電(dian)(dian)(dian)設備（PSE）的(de)(de)(de)(de)(de)電(dian)(dian)(dian)源控(kong)制(zhi)器。珠海以(yi)(yi)(yi)太(tai)網(wang)(wang)供(gong)(gong)電(dian)(dian)(dian)芯片批發(fa)(fa)(fa)廠家

Classification）0～30～4很大電(dian)(dian)(dian)(dian)(dian)流350mA600mAPSE輸(shu)出電(dian)(dian)(dian)(dian)(dian)壓44～57VDC50～57VDCPSE輸(shu)出功(gong)率(lv)(lv)<=<=30WPD輸(shu)入(ru)電(dian)(dian)(dian)(dian)(dian)壓36～57VDC～57VDCPD很大功(gong)率(lv)(lv)線纜要求(qiu)UnstructuredCAT-5eorbetter供(gong)(gong)(gong)(gong)(gong)電(dian)(dian)(dian)(dian)(dian)線纜對22POE供(gong)(gong)(gong)(gong)(gong)電(dian)(dian)(dian)(dian)(dian)供(gong)(gong)(gong)(gong)(gong)電(dian)(dian)(dian)(dian)(dian)工作過(guo)程當在(zai)一個(ge)網(wang)(wang)(wang)絡中(zhong)布置(zhi)POE供(gong)(gong)(gong)(gong)(gong)電(dian)(dian)(dian)(dian)(dian)端設(she)(she)備(bei)(bei)時(shi),POE以(yi)太網(wang)(wang)(wang)供(gong)(gong)(gong)(gong)(gong)電(dian)(dian)(dian)(dian)(dian)工作過(guo)程如下所(suo)(suo)示。1.檢(jian)(jian)測：一開(kai)始，POE設(she)(she)備(bei)(bei)在(zai)端口(kou)輸(shu)出很小的(de)(de)電(dian)(dian)(dian)(dian)(dian)壓，直到(dao)其(qi)檢(jian)(jian)測到(dao)線纜終端的(de)(de)連接為(wei)(wei)一個(ge)支持。：當檢(jian)(jian)測到(dao)受電(dian)(dian)(dian)(dian)(dian)端設(she)(she)備(bei)(bei)PD之(zhi)后，POE設(she)(she)備(bei)(bei)可(ke)能(neng)會為(wei)(wei)PD設(she)(she)備(bei)(bei)進行(xing)分(fen)類，并且評估(gu)此PD設(she)(she)備(bei)(bei)所(suo)(suo)需(xu)的(de)(de)功(gong)率(lv)(lv)損耗(hao)。3.開(kai)始供(gong)(gong)(gong)(gong)(gong)電(dian)(dian)(dian)(dian)(dian)：在(zai)一個(ge)可(ke)配置(zhi)時(shi)間(一般小于(yu)15μs)的(de)(de)啟動期內，PSE設(she)(she)備(bei)(bei)開(kai)始從(cong)低電(dian)(dian)(dian)(dian)(dian)壓向PD設(she)(she)備(bei)(bei)供(gong)(gong)(gong)(gong)(gong)電(dian)(dian)(dian)(dian)(dian)，直至提(ti)供(gong)(gong)(gong)(gong)(gong)48V的(de)(de)直流電(dian)(dian)(dian)(dian)(dian)源。4.供(gong)(gong)(gong)(gong)(gong)電(dian)(dian)(dian)(dian)(dian)：為(wei)(wei)PD設(she)(she)備(bei)(bei)提(ti)供(gong)(gong)(gong)(gong)(gong)穩(wen)定可(ke)靠48V的(de)(de)直流電(dian)(dian)(dian)(dian)(dian)，滿足PD設(she)(she)備(bei)(bei)不(bu)越(yue)過(guo)。5.斷電(dian)(dian)(dian)(dian)(dian)：若(ruo)PD設(she)(she)備(bei)(bei)從(cong)網(wang)(wang)(wang)絡上斷開(kai)時(shi)，PSE就會快速地(一般在(zai)300～400ms之(zhi)內)停止(zhi)為(wei)(wei)PD設(she)(she)備(bei)(bei)供(gong)(gong)(gong)(gong)(gong)電(dian)(dian)(dian)(dian)(dian),并重復(fu)檢(jian)(jian)測過(guo)程以(yi)檢(jian)(jian)測線纜的(de)(de)終端是否連接PD設(she)(she)備(bei)(bei)。POE供(gong)(gong)(gong)(gong)(gong)電(dian)(dian)(dian)(dian)(dian)供(gong)(gong)(gong)(gong)(gong)電(dian)(dian)(dian)(dian)(dian)的(de)(de)原理標準的(de)(de)五類網(wang)(wang)(wang)線有四對雙(shuang)絞(jiao)線，但是在(zai)10MBASE-T和100MBASE-T中(zhong)只用到(dao)其(qi)中(zhong)的(de)(de)兩(liang)對。IEEE80，應用空閑腳供(gong)(gong)(gong)(gong)(gong)電(dian)(dian)(dian)(dian)(dian)時(shi)，4、5腳連接為(wei)(wei)正極，7、8腳連接為(wei)(wei)負極。應用數據腳供(gong)(gong)(gong)(gong)(gong)電(dian)(dian)(dian)(dian)(dian)時(shi)，將DC電(dian)(dian)(dian)(dian)(dian)源加在(zai)傳輸(shu)變壓器的(de)(de)中(zhong)點，不(bu)影響數據的(de)(de)傳輸(shu)。珠海(hai)以(yi)太網(wang)(wang)(wang)供(gong)(gong)(gong)(gong)(gong)電(dian)(dian)(dian)(dian)(dian)芯片批(pi)發廠家13W以(yi)太網(wang)(wang)(wang)供(gong)(gong)(gong)(gong)(gong)電(dian)(dian)(dian)(dian)(dian)（PoE）受電(dian)(dian)(dian)(dian)(dian)設(she)(she)備(bei)(bei)（PD）接口(kou)和PWM控制器。

POE芯片(pian)的(de)(de)設(she)(she)(she)計(ji)和制(zhi)造需要(yao)(yao)考慮多個因素。首先(xian)，POE芯片(pian)需要(yao)(yao)具(ju)備(bei)高效的(de)(de)電力傳輸能(neng)力，以滿(man)足(zu)各種(zhong)網絡設(she)(she)(she)備(bei)的(de)(de)需求。其次，POE芯片(pian)需要(yao)(yao)具(ju)備(bei)良好的(de)(de)數據傳輸性能(neng)，以保證網絡設(she)(she)(she)備(bei)的(de)(de)正(zheng)常運行。此(ci)(ci)外，POE芯片(pian)還需要(yao)(yao)具(ju)備(bei)穩(wen)定(ding)可靠(kao)的(de)(de)工作性能(neng)，以確保設(she)(she)(she)備(bei)的(de)(de)長期(qi)穩(wen)定(ding)運行。隨(sui)著網絡設(she)(she)(she)備(bei)的(de)(de)普及和應用范(fan)圍(wei)的(de)(de)擴大，POE技(ji)術(shu)也得到了(le)普遍的(de)(de)應用和推廣(guang)。它不僅簡化了(le)設(she)(she)(she)備(bei)的(de)(de)安裝和布線(xian)，提高了(le)設(she)(she)(she)備(bei)的(de)(de)靈活性和可靠(kao)性，還降低了(le)設(she)(she)(she)備(bei)的(de)(de)成本和維(wei)護成本。因此(ci)(ci)，POE芯片(pian)在(zai)各種(zhong)網絡設(she)(she)(she)備(bei)中的(de)(de)應用前景(jing)非(fei)常廣(guang)闊，將(jiang)會在(zai)未來的(de)(de)發展中發揮越(yue)(yue)來越(yue)(yue)重(zhong)要(yao)(yao)的(de)(de)作用。復(fu)制(zhi)

沒有高純度的(de)(de)單(dan)晶(jing)硅(gui)，就不(bu)要(yao)提芯(xin)片(pian)，更不(bu)用(yong)說(shuo)構(gou)建(jian)一個元(yuan)宇(yu)宙的(de)(de)虛(xu)擬世界了(le)。作(zuo)(zuo)為(wei)地球(qiu)上(shang)第二豐(feng)度的(de)(de)元(yuan)素，硅(gui)普遍地存(cun)在(zai)于自然(ran)界當中(zhong)。它成本低廉(lian)，溫度穩定(ding)性好，穿透(tou)電流低，如(ru)此(ci)優異(yi)的(de)(de)性能(neng)使它代替鍺，成為(wei)了(le)半導體的(de)(de)主流材料(liao)。單(dan)質(zhi)硅(gui)主要(yao)有單(dan)晶(jing)、多晶(jing)以(yi)(yi)及(ji)非晶(jing)硅(gui)三(san)類形態(tai)，后兩種(zhong)形態(tai)缺陷太多，若(ruo)用(yong)于芯(xin)片(pian)制造，在(zai)加工過(guo)程中(zhong)會引起基(ji)材的(de)(de)電學(xue)以(yi)(yi)及(ji)力學(xue)性能(neng)變(bian)差，因(yin)此(ci)只能(neng)用(yong)高純的(de)(de)單(dan)晶(jing)硅(gui)作(zuo)(zuo)為(wei)芯(xin)片(pian)的(de)(de)基(ji)元(yuan)材料(liao)。然(ran)而自然(ran)界中(zhong)別說(shuo)單(dan)晶(jing)硅(gui)，就連硅(gui)單(dan)質(zhi)也(ye)是不(bu)存(cun)在(zai)的(de)(de)，硅(gui)元(yuan)素主要(yao)以(yi)(yi)硅(gui)酸鹽以(yi)(yi)及(ji)硅(gui)的(de)(de)氧化物形式存(cun)在(zai)，想從原(yuan)料(liao)中(zhong)獲取單(dan)晶(jing)硅(gui)并不(bu)是一個簡單(dan)的(de)(de)過(guo)程，要(yao)經過(guo)西門(men)子法提純以(yi)(yi)及(ji)CZ法制備單(dan)晶(jing)硅(gui)兩大步(bu)驟，這兩大步(bu)驟具體包括：二氧化硅(gui)原(yuan)料(liao)→金屬硅(gui)→HCl提純→氫(qing)氣還原(yuan)→多晶(jing)硅(gui)→熔(rong)融→拉制單(dan)晶(jing)硅(gui)→切片(pian)。南京國(guo)博接口串(chuan)口芯(xin)片(pian)/通信芯(xin)片(pian)WS3085N描述：半雙工協議RS485/422、VCC=5V、500Kbps、無極性。

POE電(dian)(dian)(dian)源芯(xin)片(pian)(pian)通(tong)常采用遠(yuan)程供(gong)(gong)(gong)(gong)電(dian)(dian)(dian)方(fang)式(shi)，即通(tong)過(guo)線(xian)纜(lan)從電(dian)(dian)(dian)源供(gong)(gong)(gong)(gong)電(dian)(dian)(dian)設備(bei)(bei)(bei)（PSE）向(xiang)受電(dian)(dian)(dian)設備(bei)(bei)(bei)（PD）供(gong)(gong)(gong)(gong)電(dian)(dian)(dian)。這種(zhong)技術(shu)(shu)可以在(zai)(zai)不中(zhong)斷網(wang)絡連接(jie)(jie)的(de)(de)情(qing)況(kuang)下為設備(bei)(bei)(bei)提供(gong)(gong)(gong)(gong)電(dian)(dian)(dian)力，因此(ci)被廣(guang)泛應用于網(wang)絡攝像頭、無線(xian)接(jie)(jie)入(ru)點、智能插(cha)座(zuo)等(deng)需要(yao)(yao)通(tong)過(guo)網(wang)絡線(xian)纜(lan)供(gong)(gong)(gong)(gong)電(dian)(dian)(dian)的(de)(de)設備(bei)(bei)(bei)中(zhong)。POE電(dian)(dian)(dian)源芯(xin)片(pian)(pian)的(de)(de)主要(yao)(yao)功(gong)能是(shi)通(tong)過(guo)以太(tai)網(wang)線(xian)纜(lan)向(xiang)連接(jie)(jie)的(de)(de)設備(bei)(bei)(bei)提供(gong)(gong)(gong)(gong)電(dian)(dian)(dian)力。但是(shi)，隨著技術(shu)(shu)的(de)(de)不斷發展，現(xian)在(zai)(zai)的(de)(de)POE電(dian)(dian)(dian)源芯(xin)片(pian)(pian)還具(ju)有更多(duo)(duo)的(de)(de)功(gong)能，例(li)如(ru)檢測連接(jie)(jie)的(de)(de)設備(bei)(bei)(bei)、自動(dong)功(gong)率管(guan)理(li)、過(guo)壓和(he)過(guo)流保護等(deng)。這些功(gong)能使(shi)得(de)POE電(dian)(dian)(dian)源芯(xin)片(pian)(pian)更加安(an)全、可靠(kao)、方(fang)便(bian)(bian)實(shi)(shi)用。總之，POE電(dian)(dian)(dian)源芯(xin)片(pian)(pian)是(shi)一種(zhong)實(shi)(shi)現(xian)POE技術(shu)(shu)的(de)(de)重要(yao)(yao)組件，它(ta)們可以通(tong)過(guo)以太(tai)網(wang)線(xian)纜(lan)向(xiang)連接(jie)(jie)的(de)(de)設備(bei)(bei)(bei)提供(gong)(gong)(gong)(gong)電(dian)(dian)(dian)力，并具(ju)有多(duo)(duo)種(zhong)功(gong)能，使(shi)得(de)它(ta)們更加安(an)全、可靠(kao)、方(fang)便(bian)(bian)實(shi)(shi)用。視頻(pin)(pin)會議終(zhong)端，主流的(de)(de)視頻(pin)(pin)會議終(zhong)端，高清會議終(zhong)端，通(tong)用多(duo)(duo)媒(mei)體設備(bei)(bei)(bei)。江門以太(tai)網(wang)供(gong)(gong)(gong)(gong)電(dian)(dian)(dian)芯(xin)片(pian)(pian)新技術(shu)(shu)推薦

MP8001 / MP8001A是IEEE 802.3af 標準(zhun)POE受電設備（PD）控制(zhi)器。珠海以(yi)太網(wang)供(gong)電芯(xin)片批(pi)發廠家

以太(tai)(tai)(tai)網(wang)(wang)(wang)實現了網(wang)(wang)(wang)絡(luo)上(shang)無線(xian)電(dian)(dian)(dian)(dian)(dian)系(xi)(xi)統(tong)多個節(jie)(jie)(jie)點(dian)發送(song)信(xin)息(xi)的(de)(de)(de)想法,每個節(jie)(jie)(jie)點(dian)必須獲(huo)取電(dian)(dian)(dian)(dian)(dian)纜或者信(xin)道的(de)(de)(de)才能(neng)傳(chuan)送(song)信(xin)息(xi),有(you)時(shi)(shi)也(ye)叫作(zuo)以太(tai)(tai)(tai)（Ether）。（這個名字來(lai)源(yuan)于(yu)(yu)19世紀的(de)(de)(de)物理學家假設(she)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)磁輻射媒體-光以太(tai)(tai)(tai)。后來(lai)的(de)(de)(de)研究(jiu)證明光以太(tai)(tai)(tai)不存在(zai)。）每一(yi)個節(jie)(jie)(jie)點(dian)有(you)全球(qiu)只一(yi)的(de)(de)(de)48位地址(zhi)也(ye)就(jiu)是制造(zao)商(shang)分配給網(wang)(wang)(wang)卡(ka)的(de)(de)(de)MAC地址(zhi),以保證以太(tai)(tai)(tai)網(wang)(wang)(wang)上(shang)所有(you)節(jie)(jie)(jie)點(dian)能(neng)互相鑒別(bie)。由(you)于(yu)(yu)以太(tai)(tai)(tai)網(wang)(wang)(wang)十(shi)分普(pu)(pu)遍(bian),許多制造(zao)商(shang)把(ba)以太(tai)(tai)(tai)網(wang)(wang)(wang)卡(ka)直接集成進計算機主板。以太(tai)(tai)(tai)網(wang)(wang)(wang)供(gong)(gong)電(dian)(dian)(dian)(dian)(dian)是在(zai)以太(tai)(tai)(tai)網(wang)(wang)(wang)中透過(guo)雙絞線(xian)來(lai)傳(chuan)輸電(dian)(dian)(dian)(dian)(dian)力與(yu)數據到設(she)備(bei)(bei)上(shang)的(de)(de)(de)技(ji)術(shu)(shu)。透過(guo)這項技(ji)術(shu)(shu)可(ke)使(shi)包括網(wang)(wang)(wang)絡(luo)電(dian)(dian)(dian)(dian)(dian)話、無線(xian)基(ji)站、攝(she)像頭(tou)、集線(xian)器、電(dian)(dian)(dian)(dian)(dian)腦(nao)等設(she)備(bei)(bei)都能(neng)采用(yong)PoE技(ji)術(shu)(shu)供(gong)(gong)電(dian)(dian)(dian)(dian)(dian),由(you)于(yu)(yu)能(neng)借(jie)由(you)以太(tai)(tai)(tai)網(wang)(wang)(wang)獲(huo)得供(gong)(gong)電(dian)(dian)(dian)(dian)(dian)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)子(zi)設(she)備(bei)(bei)無需(xu)額(e)外(wai)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)源(yuan)插座就(jiu)可(ke)使(shi)用(yong),所以同(tong)(tong)(tong)時(shi)(shi)能(neng)省(sheng)去配置電(dian)(dian)(dian)(dian)(dian)源(yuan)線(xian)的(de)(de)(de)時(shi)(shi)間(jian)與(yu)金錢,使(shi)整(zheng)個設(she)備(bei)(bei)系(xi)(xi)統(tong)的(de)(de)(de)成本相對降低。而目前全球(qiu)均(jun)普(pu)(pu)遍(bian)采用(yong)RJ-45網(wang)(wang)(wang)絡(luo)插座,因此各種PoE設(she)備(bei)(bei)都具(ju)備(bei)(bei)兼容性。這項技(ji)術(shu)(shu)常(chang)常(chang)被跟同(tong)(tong)(tong)樣也(ye)是在(zai)同(tong)(tong)(tong)一(yi)條(tiao)電(dian)(dian)(dian)(dian)(dian)纜上(shang)接收電(dian)(dian)(dian)(dian)(dian)源(yuan)與(yu)數據。雖然是類比數據）的(de)(de)(de)傳(chuan)統(tong)電(dian)(dian)(dian)(dian)(dian)話網(wang)(wang)(wang)絡(luo)。POTS）來(lai)對照。PoE不需(xu)要更改以太(tai)(tai)(tai)網(wang)(wang)(wang)的(de)(de)(de)纜線(xian)架(jia)構即可(ke)運(yun)作(zuo),所以采用(yong)PoE系(xi)(xi)統(tong)不但(dan)節(jie)(jie)(jie)省(sheng)成本易于(yu)(yu)布(bu)線(xian)安裝還(huan)具(ju)備(bei)(bei)了遠程通電(dian)(dian)(dian)(dian)(dian)、斷電(dian)(dian)(dian)(dian)(dian)的(de)(de)(de)能(neng)力。PoE又分為供(gong)(gong)電(dian)(dian)(dian)(dian)(dian)端（簡(jian)稱(cheng)PSE）和受電(dian)(dian)(dian)(dian)(dian)端（PoweredDevice,簡(jian)稱(cheng)PD）。還(huan)有(you)AT和AF的(de)(de)(de)差別(bie)。珠海以太(tai)(tai)(tai)網(wang)(wang)(wang)供(gong)(gong)電(dian)(dian)(dian)(dian)(dian)芯片批發廠家

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