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src="https://tyunfile.71360.com/WaterMark/UploadFile/leihuo/637330122735830078/1774710.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="zo2tvhy" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)格要求：</span>面議</p><p><span>所在地：</span>四川省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>舟山X8000光源主機(jī)芯片級(jí)維修,X8000</p><p><span>***更新：</span>2021-01-27 03:08:11</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="hbyqne8" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">成都鐳伙科技有限公司</a></p><p><span>聯(lián)系人：</span>邱鋒</p><p><span>郵箱: </span>cdleihuokeji@163.com</p><p><span>電話(huà): </span>13982269628</p><p><span>傳真: </span>028_</p><p><span>網(wǎng)址: </span></p><p><span>手機(jī): </span>028-8444323</p><p><span>地址: </span>新都區(qū)踏水路創(chuàng)想大廈2單元2606</p><p>[當(dāng)前離線(xiàn)] <a 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提高開(kāi)關(guān)電源效率的一些小技巧1、在開(kāi)關(guān)電源次級(jí)輸出端的肖特基上并一個(gè)小功率快速二極管來(lái)代替RC吸收。2、在體積和面積的允許下，盡量選用PQRM型的變壓器，在安規(guī)允許的情況下，變壓器不加擋墻效率可以得到提升。3、輸入和輸出的電解容量值。AC輸入整流電解容量低時(shí)效率會(huì)低，何為低？用示波器看AC輸入整流后紋波，小于10W功率，紋波10~30V為佳，大于10W紋波在5~20V為佳。4，舟山X8000光源主機(jī)芯片級(jí)維修、主電流回路PCB盡量短。5、優(yōu)化變壓器參數(shù)設(shè)計(jì)，舟山X8000光源主機(jī)芯片級(jí)維修，減少振鈴帶來(lái)的渦流損耗。6、合理選用開(kāi)關(guān)器件。7、輸入EMI部分優(yōu)化設(shè)計(jì)8、選擇高效率的拓補(bǔ)結(jié)構(gòu)9、選擇好的電解電容10、啟動(dòng)部分功耗設(shè)計(jì)11、芯片輔助供電優(yōu)化視頻教程團(tuán)購(gòu)優(yōu)惠活動(dòng)后面8天，活動(dòng)結(jié)束后將恢復(fù)原價(jià)長(zhǎng)按二維碼進(jìn)入眾籌團(tuán)購(gòu)視頻教程的相關(guān)情況主講人簡(jiǎn)介張飛IC咖啡2015年度很受歡迎講師2005年起從事電子研發(fā)，2008年至2015年在大型外資企業(yè)擔(dān)任首席工程師、**，研發(fā)企業(yè)未來(lái)3至5年的產(chǎn)品。提出學(xué)習(xí)研究和設(shè)計(jì)電路的三大定律，顛覆大家原有學(xué)習(xí)電路固有思維，消除電路學(xué)習(xí)恐懼給大家?guī)?lái)快樂(lè)學(xué)習(xí)的全新思路。憑著過(guò)硬的技術(shù)，舟山X8000光源主機(jī)芯片級(jí)維修，如今已成功創(chuàng)立并經(jīng)營(yíng)一家年產(chǎn)值幾千萬(wàn)元的科技企業(yè)。目錄上部1、反激開(kāi)關(guān)電源的設(shè)計(jì)思路。大型醫(yī)院設(shè)備的維修已從元件級(jí)向板卡級(jí)過(guò)渡。舟山X8000光源主機(jī)芯片級(jí)維修</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="舟山X8000光源主機(jī)芯片級(jí)維修,X8000" src="https://tyunfile.71360.com/WaterMark/UploadFile/leihuo/637330122735830078/1774710.png"></div><p> 也就是給高頻的開(kāi)關(guān)噪聲提高一條低阻抗泄防途徑。高頻旁路電容一般比較小，根據(jù)諧振頻率一般取μF、μF等；而去耦合電容的容量一般較大，可能是10μF或者更大，依據(jù)電路中分布參數(shù)、以及驅(qū)動(dòng)電流的變化大小來(lái)確定。旁路是把輸入信號(hào)中的干擾作為濾除對(duì)象，而去耦是把輸出信號(hào)的干擾作為濾除對(duì)象，防止干擾信號(hào)返回電源。這應(yīng)該是他們的本質(zhì)區(qū)別。3）濾波從理論上（即假設(shè)電容為純電容）說(shuō)，電容越大，阻抗越小，通過(guò)的頻率也越高。但實(shí)際上超過(guò)1μF的電容大多為電解電容，有很大的電感成份，所以頻率高后反而阻抗會(huì)增大。有時(shí)會(huì)看到有一個(gè)電容量較大電解電容并聯(lián)了一個(gè)小電容，這時(shí)大電容通低頻，小電容通高頻。電容的作用就是通高阻低，通高頻阻低頻。電容越大低頻越容易通過(guò)，電容越大高頻越容易通過(guò)。具體用在濾波中,大電容（1000μF）濾低頻，小電容（20pF）濾高頻。曾有網(wǎng)友形象地將濾波電容比作“水塘”。由于電容的兩端電壓不會(huì)突變，由此可知，信號(hào)頻率越高則衰減越大，可很形象的說(shuō)電容像個(gè)水塘，不會(huì)因幾滴水的加入或蒸發(fā)而引起水量的變化。它把電壓的變動(dòng)轉(zhuǎn)化為電流的變化，頻率越高，峰值電流就越大，從而緩沖了電壓。濾波就是充電，放電的過(guò)程。舟山X8000光源主機(jī)芯片級(jí)維修與儀器設(shè)備供應(yīng)商建立良好關(guān)系，經(jīng)常取得聯(lián)系，及時(shí)反饋儀器使用信息。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="舟山X8000光源主機(jī)芯片級(jí)維修,X8000" src="https://tyunfile.71360.com/WaterMark/UploadFile/leihuo/637330123654023437/3344689.png"></div><p> 如果系統(tǒng)有很多電源或很多輸出，哪個(gè)電壓需要先進(jìn)行，哪個(gè)電壓需要后進(jìn)行，這是一個(gè)順序的問(wèn)題，這些問(wèn)題都可以通過(guò)數(shù)字技術(shù)實(shí)現(xiàn)。這些就是數(shù)字電源的優(yōu)勢(shì)。從劣勢(shì)來(lái)講，因現(xiàn)在市場(chǎng)上數(shù)字電源還不是很廣大，從元器件的角度來(lái)講，像模擬的控制芯片，比如3842、3843很多廠(chǎng)商都在生產(chǎn)，但是生產(chǎn)出來(lái)的產(chǎn)品并不是一樣的，所以在通用性問(wèn)題或者成本問(wèn)題上，很多設(shè)計(jì)人員都有一些顧慮。從設(shè)計(jì)的本身來(lái)講，并不是那么廣大和完善。有些設(shè)計(jì)人員擔(dān)心，我們?cè)O(shè)計(jì)的數(shù)字芯片是不是把以前的模擬的概念都忘記了，是不是我要學(xué)很多編程，從目前來(lái)看這也是一個(gè)比較劣勢(shì)的地方。從我們公司的角度出發(fā)，另外從iwatt的產(chǎn)品來(lái)看，我們希望提供一個(gè)低成本，并且非常容易設(shè)計(jì)，也就是說(shuō)并不需要大家去編程，并不需要大家了解到底內(nèi)部數(shù)字是怎么樣去實(shí)現(xiàn)，設(shè)計(jì)的時(shí)候只需要像傳統(tǒng)的芯片一樣，以傳統(tǒng)芯片的眼光，從模擬的角度去看這個(gè)芯片怎么設(shè)計(jì)。在這個(gè)過(guò)程就能體會(huì)數(shù)字設(shè)計(jì)的優(yōu)點(diǎn)在哪里。Q15：什么是實(shí)時(shí)波形分析？A15：談到實(shí)施波形分析，不可避免的要談到原邊控制。原邊控制跟副邊控制本質(zhì)上的區(qū)別是如果采用傳統(tǒng)的副邊控制來(lái)檢測(cè)副邊的輸出電壓和輸出電流。</p><p> 拓?fù)浣Y(jié)構(gòu)及原理框圖講解2、驅(qū)動(dòng)電路設(shè)計(jì)3、經(jīng)典驅(qū)動(dòng)芯片UC3842內(nèi)部結(jié)構(gòu)講解4、頻率設(shè)計(jì)講解5、吸收電路設(shè)計(jì)及作用講解6、功率開(kāi)關(guān)管MOSFET的開(kāi)關(guān)速度，發(fā)熱因素及選型講解7、輸出電路設(shè)計(jì)8、MOSFET選型，吸收電路器件選型，輸出二極管選型，輸入輸出電容等重要器件參數(shù)計(jì)算。9、電流環(huán)設(shè)計(jì)10、電壓環(huán)設(shè)計(jì)11、經(jīng)典基準(zhǔn)電壓源TL431內(nèi)部結(jié)構(gòu)講解12、光耦的應(yīng)用講解13、TL431、光耦組合電路參數(shù)計(jì)算。14、EMI設(shè)計(jì)簡(jiǎn)單介紹下部一、變壓器設(shè)計(jì)計(jì)算與制作1、反激電源高頻變壓器設(shè)計(jì)a、占空比的設(shè)定，頻率f的設(shè)定b、匝數(shù)比設(shè)定c、初級(jí)電流計(jì)算d、初級(jí)感量計(jì)算e、初級(jí)匝數(shù)計(jì)算f、次級(jí)匝數(shù)計(jì)算g、磁芯選型2、變壓器繞制方式講解3、變壓器感量測(cè)試和漏感測(cè)試講解二、反激開(kāi)關(guān)電源硬件調(diào)試與測(cè)試1、使用示波器，輸入電壓測(cè)試，輸入紋波測(cè)試，輸出電壓測(cè)試，輸出紋波測(cè)試及改善。2、啟動(dòng)延時(shí)調(diào)試。3、初級(jí)和次級(jí)波形測(cè)試。4、MOS管開(kāi)通和關(guān)斷時(shí)間測(cè)試。5、MOS管發(fā)熱因素調(diào)試，高頻噪音EMC調(diào)試。6、輸出電壓改變調(diào)試。7、輕載和重載測(cè)試。傳統(tǒng)的維修，一般必須要找到故障元器件，耗時(shí)較多，用比較低的成本修好。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="舟山X8000光源主機(jī)芯片級(jí)維修,X8000" src="https://tyunfile.71360.com/WaterMark/UploadFile/leihuo/637330123387548828/4928103.png"></div><p> 這能夠很好地防止輸入值過(guò)大而導(dǎo)致的地電位抬高和噪聲。地彈是地連接處在通過(guò)大電流毛刺時(shí)的電壓降。應(yīng)該明白，大容量和小容量的旁路電容都可能是必需的，有的甚至是多個(gè)陶瓷電容和鉭電容。這樣的組合能夠解決上述負(fù)載電流或許為階梯變化所帶來(lái)的問(wèn)題，而且還能提供足夠的去耦以控制電壓和電流毛刺。在負(fù)載變化非常劇烈的情況下，則需要三個(gè)或更多不同容量的電容，以保證在穩(wěn)壓器穩(wěn)壓前提供足夠的電流?？焖俚乃矐B(tài)過(guò)程由高頻小容量電容來(lái)控制，中速的瞬態(tài)過(guò)程由低頻大容量來(lái)控制，剩下則交給穩(wěn)壓器完成了。還應(yīng)記住一點(diǎn)，穩(wěn)壓器也要求電容盡量靠近電壓輸出端。話(huà)說(shuō)電容之七：電容的等效串聯(lián)電阻ESR普遍的觀點(diǎn)是：一個(gè)等效串聯(lián)電阻（ESR）很小的相對(duì)較大容量的外部電容能很好地吸收快速轉(zhuǎn)換時(shí)的峰值（紋波）電流。但是，有時(shí)這樣的選擇容易引起穩(wěn)壓器（特別是線(xiàn)性穩(wěn)壓器LDO）的不穩(wěn)定，所以必須合理選擇小容量和大容量電容的容值。永遠(yuǎn)記住，穩(wěn)壓器就是一個(gè)放大器，放大器可能出現(xiàn)的各種情況它都會(huì)出現(xiàn)。由于DC/DC轉(zhuǎn)換器的響應(yīng)速度相對(duì)較慢，輸出去耦電容在負(fù)載階躍的初始階段起主導(dǎo)的作用，因此需要額外大容量的電容來(lái)減緩相對(duì)于DC/DC轉(zhuǎn)換器的快速轉(zhuǎn)換。新的技術(shù)，由于保密、**的原因，我們只能知道其名稱(chēng)、功能，而對(duì)具體的電路實(shí)現(xiàn)，無(wú)法得知。舟山X8000光源主機(jī)芯片級(jí)維修</p><p style="text-indent:25px">大型跨國(guó)公司，專(zhuān)業(yè)公司，逐步在全國(guó)各地設(shè)置分支機(jī)構(gòu)。舟山X8000光源主機(jī)芯片級(jí)維修</p><p> 其實(shí)在維修中和大多數(shù)設(shè)計(jì)過(guò)程中，把實(shí)際放大器當(dāng)做理想放大器來(lái)分析也不會(huì)有問(wèn)題）。虛短用來(lái)的出電壓相等，虛短用來(lái)得出無(wú)電流流經(jīng)。1）反向放大器：圖1圖一運(yùn)放的同向端接地=0V，反向端和同向端虛短，所以也是0V，反向輸入端輸入電阻很高，虛斷，幾乎沒(méi)有電流注入和流出，那么R1和R2相當(dāng)于是串聯(lián)的，流過(guò)一個(gè)串聯(lián)電路中的每一只組件的電流是相同的，即流過(guò)R1的電流和流過(guò)R2的電流是相同的。流過(guò)R1的電流：I1=(Vi-V-)/R1………a流過(guò)R2的電流：I2=(V--Vout)/R2……bV-=V+=0………………cI1=I2……………………d求解上面的初中代數(shù)方程得Vout=(-R2/R1)*Vi這就是傳說(shuō)中的反向放大器的輸入輸出關(guān)系式了。2）同向放大器：圖2圖二中Vi與V-虛短，則Vi=V-……a因?yàn)樘摂?，反向輸入端沒(méi)有電流輸入輸出，通過(guò)R1和R2的電流相等，設(shè)此電流為I，由歐姆定律得：I=Vout/(R1+R2)……bVi等于R2上的分壓，即：Vi=I*R2……c由abc式得Vout=Vi*(R1+R2)/R2這就是傳說(shuō)中的同向放大器的公式了。3）加法器1：圖3圖三中，由虛短知：V-=V+=0……a由虛斷及基爾霍夫定律知，通過(guò)R2與R1的電流之和等于通過(guò)R3的電流，故(V1–V-)/R1+(V2–V-)/R2=(Vout–V-)/R3……b代入a式。舟山X8000光源主機(jī)芯片級(jí)維修</p><p style="text-indent:25px">成都鐳伙科技有限公司是一家電子技術(shù)研究開(kāi)發(fā)及轉(zhuǎn)讓、電氣設(shè)備、醫(yī)療設(shè)備維護(hù)服務(wù)、機(jī)械設(shè)備的設(shè)計(jì)、銷(xiāo)售；電器用品、醫(yī)療器械；貨物及技術(shù)進(jìn)出口。專(zhuān)業(yè)維修直管硬鏡、攝像系統(tǒng)、冷光源、氣腹機(jī)、動(dòng)力系統(tǒng)、灌注泵、動(dòng)力系統(tǒng)手柄、超聲刀手柄。軟質(zhì)器械激光焊接。的公司，致力于發(fā)展為創(chuàng)新務(wù)實(shí)、誠(chéng)實(shí)可信的企業(yè)。公司自創(chuàng)立以來(lái)，投身于內(nèi)窺鏡以及維修周邊，動(dòng)力系統(tǒng)及手柄附件維修，攝像系統(tǒng)主機(jī)及攝像頭維修，手術(shù)器械類(lèi)維修，是儀器儀表的主力軍。成都鐳伙科技不斷開(kāi)拓創(chuàng)新，追求出色，以技術(shù)為先導(dǎo)，以產(chǎn)品為平臺(tái)，以應(yīng)用為重點(diǎn)，以服務(wù)為保證，不斷為客戶(hù)創(chuàng)造更高價(jià)值，提供更優(yōu)服務(wù)。成都鐳伙科技始終關(guān)注儀器儀表行業(yè)。滿(mǎn)足市場(chǎng)需求，提高產(chǎn)品價(jià)值，是我們前行的力量。</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/3027028.html</p></div></div></div></div></div><div id="ti2jbj8" class="page-right twoColRt"><div id="ba8wdfm" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="c7xugc2" class="recomPic likePro"><a 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