{"code":200,"return":true,"data":{"live":[{"id":310,"categoryid":12,"live_data":{"name":"PCB封装设计的重要性及设计注意事项","desc":"\n直播简介：PCB封装是在进行PCB设计","templatetype":2,"authtype":2,"publisherpass":193275,"assistantpass":193275,"foreignpublish":"0","openhostmode":0,"hostloginmode":0,"barrage":"","livestarttime":"2026-10-14 20:00","publishurls":[]},"roomid":"B268C8B50ED550A39C33DC5901307461","title":"PCB封装设计的重要性及设计注意事项","price":"0.00","thumb":"https:\/\/api.fanyedu.com\/uploads\/image\/e4\/f57a429ad942d6885a0f3e7bbc7c86.jpg","orderby":0,"audit":0,"createtime":"2026-10-12 15:01:35","updatetime":"2026-11-11 23:01:32","desc":"直播简介：PCB封装是在进行PCB设计的第一道关卡，没有它无法导入到我们PCB中去进行布局布线，PCB封装要是做得不对，无法和我们的实物进行对应的，可能导致的后果就是板子直接用了，可见这块的重要性。本次直播将详细讲解国创基础资源库的使用方法","content":"

直播简介：<\/span><\/p>

PCB封装是在进行PCB设计的第一道关卡，没有它无法导入到我们PCB中去进行布局布线，PCB封装要是做得不对，无法和我们的实物进行对应的，可能导致的后果就是板子直接用了，可见这块的重要性。本次直播将详细讲解国创基础资源库的使用方法，主要带大家了解封装的各个设计规范及标准.<\/span><\/p>


<\/span><\/p>

直播内容:
1、PCB封装如何定义
2、焊盘的设计及补偿值
3、封装丝印的设计规范
4、PCB封装的快速获取<\/span>
<\/span><\/p>

注册领取免费使用资格，获取官网链接\/直播回放。<\/p>

扫码添加国创客服领取<\/strong><\/p>

\"7aa869c5fdc0bc6de812a4a4b76473.png\"<\/p>","views":1956,"uid":53688,"tags":["PCB封装","PCB设计","布局布线"],"status":2,"reject":null,"playstatus":3,"playtime":"2026-10-14 20:00:00","count":1,"comments":0,"likes":1,"collects":1,"hasreplay":1,"deletetime":null,"isnotify":0,"isgiveintegral":1},{"id":309,"categoryid":10,"live_data":{"name":"别困在PCB！先进封装才是半导体黄金赛道","desc":"直播结束后扫码添加助教领取课件直播介绍：","templatetype":2,"authtype":2,"publisherpass":960650,"assistantpass":960650,"foreignpublish":"0","openhostmode":0,"hostloginmode":0,"barrage":"","livestarttime":"2026-07-31 20:00","publishurls":[]},"roomid":"046C3AAB6E4A23B99C33DC5901307461","title":"别困在PCB！先进封装才是半导体黄金赛道","price":"0.00","thumb":"https:\/\/api.fanyedu.com\/uploads\/image\/7c\/a31123faee9b4e1cdba81f06b8c14f.jpg","orderby":0,"audit":0,"createtime":"2026-07-27 18:02:13","updatetime":"2026-11-11 23:09:16","desc":"直播结束后扫码添加助教领取课件直播介绍：本次直播由弘快科技EDA技术支持部梁老师主讲，围绕PCB工程师向先进封装方向转型展开系统讲解。内容涵盖封装技术演进路径（2.5D、3D、Fan-out、Chiplet）、行业市场数据、岗位需求与薪资水","content":"

直播结束后<\/p>

扫码添加助教领取课件<\/b><\/p>

\"1c41841f13c31cd5c1230e8428a7dc.png\"<\/p>


<\/p>

直播介绍：<\/font><\/b><\/p>

本次直播由弘快科技EDA技术支持部梁老师主讲，围绕PCB工程师向先进封装方向转型展开系统讲解。<\/font><\/p>

内容涵盖封装技术演进路径（2.5D、3D、Fan-out、Chiplet）、行业市场数据、岗位需求与薪资水平，以及国产封装设计工具RedPKG的实际应用能力。<\/font><\/p>

PCB设计工程师具备电路基础、布线经验、信号完整性分析等核心能力，这些技能与封装设计高度相关，转型具有天然优势。直播将说明转型路径、需要补充的知识体系，以及实际落地周期。<\/font><\/p>

适合1-5年经验的PCB设计工程师、考虑转型的电子行业从业者，以及对半导体封装方向感兴趣的在校生和应届毕业生。<\/font><\/p>


<\/font><\/p>工具赋能：RedPKG助力高效封装设计<\/b><\/b><\/font>

• 全流程工艺覆盖：WB\/FC\/2.5D\/Chiplet\/SiP全面支持<\/font><\/p>

• 自动化设计校验：Excel导入、3D预览、DRC\/DFM合规检查<\/font><\/p>

• 仿真分析一体化：SI\/PI\/热仿真无缝集成<\/font><\/p>

• 自主可控信创：兼容国产操作系统与硬件生态<\/font><\/p>

• 实战案例：FCBGA与WBBGA封装项目设计展示<\/font><\/p>


<\/p>

\"184ba88cbda4f56d8a98d827c161fa.png\"<\/p>

\"dd5a9308e611c8b123a6c32f6d96bb.png\"<\/p>

\"6aa6f64c58d0893a4106ded41277a4.png\"<\/p>


<\/p>

\"48aa079da4d11f970e7ac90db85831.png\"<\/p>","views":6244,"uid":198799,"tags":["PCB封装","电子工程师","半导体","3D封装"],"status":2,"reject":null,"playstatus":3,"playtime":"2026-07-31 20:00:00","count":1,"comments":0,"likes":2,"collects":5,"hasreplay":1,"deletetime":null,"isnotify":0,"isgiveintegral":1},{"id":308,"categoryid":12,"live_data":{"name":"PCB设计如何降低开关电源干扰","desc":"直播介绍很多开关电源项目，原理图看起来没","templatetype":2,"authtype":2,"publisherpass":921366,"assistantpass":921366,"foreignpublish":"0","openhostmode":0,"hostloginmode":0,"barrage":"","livestarttime":"2026-07-03 20:00","publishurls":[]},"roomid":"5E6D122E06872DF79C33DC5901307461","title":"PCB设计如何降低开关电源干扰","price":"0.00","thumb":"https:\/\/api.fanyedu.com\/uploads\/image\/1b\/d1d2f5becbe60db0438bdcde70ea55.png","orderby":0,"audit":0,"createtime":"2026-07-02 16:03:43","updatetime":"2026-11-11 23:08:57","desc":"直播介绍很多开关电源项目，原理图看起来没问题，但一到测试就出现纹波偏大、干扰严重、系统不稳定等问题。真正的原因，往往不是芯片选错，而是PCB设计没有控制好电流回路、地回流路径和关键器件布局。本场直播将以BUCK拓扑开关电源为例，从电路工作过","content":"

直播介绍<\/p>

很多开关电源项目，原理图看起来没问题，但一到测试就出现纹波偏大、干扰严重、系统不稳定等问题。真正的原因，往往不是芯片选错，而是PCB设计没有控制好电流回路、地回流路径和关键器件布局。<\/span><\/p>

本场直播将以BUCK拓扑开关电源为例，从电路工作过程讲到地弹产生机理，再结合PCB设计案例，帮助硬件工程师和PCB Layout工程师理解：开关电源干扰到底从哪里来，PCB设计阶段应该怎么提前规避。<\/span><\/p>


<\/span><\/p>直播内容

本场直播会先拆解BUCK降压电路的基本工作过程，包括开关闭合、续流、储能和滤波几个关键状态；然后重点讲解地弹产生原因，说明为什么瞬态电流、磁通量变化和环路面积会直接影响电源干扰；<\/span>如何借助国创基础资源库提升效率与作品规范性；<\/span>最后结合BUCK开关电源PCB案例，分析输入电容、功率器件、电感、二极管、输出电容和地回路的布局布线要点，并在直播末尾进行互动答疑。<\/span><\/p>
主题大纲

  1. BUCK拓扑结构电路介绍<\/strong>
    \n讲清开关闭合、续流阶段的电流路径，以及降压变换器的工作逻辑。\n<\/li>\n
  2. 开关电源干扰的关键来源<\/strong>
    \n从瞬态电流、磁通变化、环路面积理解地弹与噪声产生原因。\n<\/li>\n
  3. PCB设计如何减小地弹影响<\/strong>
    \n围绕高di\/dt回路、接地方式、输入输出电容布局、回流路径进行分析。\n<\/li>\n
  4. BUCK拓扑开关电源PCB案例分析<\/strong>
    \n结合实际Layout案例，拆解器件摆放、功率环路、地回路和关键走线问题。\n<\/li>\n
  5. 交流互动，问题解答<\/strong>
    \n解答开关电源纹波、地弹、干扰、布局布线等常见问题。<\/li>\n<\/ol>

    \"57ee72991f94fbb71defe1008b45e8.png\"<\/p>

    注册领取免费使用资格，获取官网链接\/直播回放。
    扫码添加国创客服领取<\/span>
    <\/p>

    \"7aa869c5fdc0bc6de812a4a4b76473.png\"<\/p>
    ","views":5560,"uid":24529,"tags":["PCB设计","开挂电源","BUCK拓扑","降压变换器","电源设计"],"status":2,"reject":null,"playstatus":3,"playtime":"2026-07-03 20:00:00","count":1,"comments":0,"likes":1,"collects":6,"hasreplay":1,"deletetime":null,"isnotify":0,"isgiveintegral":1},{"id":307,"categoryid":9,"live_data":{"name":"2026年第十九届成图大赛备赛直播讲解","desc":"直播介绍：本次直播将详细讲解国创基础资源","templatetype":2,"authtype":2,"publisherpass":488176,"assistantpass":488176,"foreignpublish":"0","openhostmode":0,"hostloginmode":0,"barrage":"","livestarttime":"2026-05-22 20:00","publishurls":[]},"roomid":"07D42D51AA0146359C33DC5901307461","title":"2026年第十九届成图大赛备赛直播讲解","price":"0.00","thumb":"https:\/\/api.fanyedu.com\/uploads\/image\/b4\/48ad9aad1fce56cd71dcef2f732252.jpg","orderby":0,"audit":0,"createtime":"2026-05-20 11:34:05","updatetime":"2026-11-12 00:06:54","desc":"直播介绍：本次直播将详细讲解国创基础资源库的使用方法，并通过模拟题实操演示，帮助参赛同学高效备赛，提升作品质量，冲刺好成绩！直播大纲：01、直播背景介绍围绕第十九届成图大赛备赛需求，先介绍本次直播的背景与目的，说明赛前库文件准备的重要性;并","content":"

    直播介绍：<\/b><\/p>

    本次直播将详细讲解国创基础资源库的使用方法，并通过模拟题实操演示，帮助参赛同学高效备赛，提升作品质量，冲刺好成绩！<\/p>


    <\/p>

    直播大纲：<\/b>
    01、直播背景介绍
    围绕第十九届成图大赛备赛需求，先介绍本次直播的背景与目的，说明赛前库文件准备的重要性;并结合AI辅助设计趋势，引出如何借助国创基础资源库提升备赛效率与作品规范性。<\/p>


    02、资源库引入
    介绍国创基础资源库，一站式配齐所需数据，大赛期间免费开放，助力高效备赛库的<\/p>


    03、资源库基本功能讲解
    演示元器件库等功能，讲解目录、筛选、预览、多格式下载等操作<\/p>


    <\/p>

    04、模拟题操作演示<\/p>

    结合模拟题进行实操演示，展示资源库在成图大赛备赛中的实际应用<\/p>


    <\/p>

    05直播结尾与福利
    注册领取免费使用资格，获取官网链接\/直播回放。<\/p>

    扫码添加国创客服领取<\/b><\/p>

    \"7aa869c5fdc0bc6de812a4a4b76473.png\"<\/p>","views":8065,"uid":53688,"tags":["电子竞赛","国创资源库","成图大赛","pcb设计","大学生电赛"],"status":2,"reject":null,"playstatus":3,"playtime":"2026-05-22 20:00:00","count":1,"comments":0,"likes":3,"collects":4,"hasreplay":1,"deletetime":null,"isnotify":0,"isgiveintegral":1}],"newCourse":[{"id":22185,"uid":24529,"title":"西安培华学院专场｜PCB 专业认证 + 成图大赛备赛宣讲","desc":"扫码添加助教微信进群答疑+素材领取","price":"0.00","content":"


    <\/font><\/p>

    扫码添加助教微信<\/font><\/p>

    进群答疑+素材领取<\/font><\/p>

    \"69a5b642a3a32ea5bd49b6b9c156cc.png\"<\/p>","orderby":0,"categoryid":12,"status":2,"keywords":null,"thumb":"https:\/\/api.fanyedu.com\/uploads\/image\/fc\/546441cb639ed4d4d32821112d07d7.png","buycount":1,"count":1,"likes":0,"views":165,"comments":0,"collects":0,"reject":null,"invite":0,"createtime":"2026-11-04 10:52:58","updatetime":"2026-11-11 23:57:26","deletetime":null,"tags":["中国电子学会","pcb","成图大赛"],"annex":{"type":"0","url":"","pwd":""},"hot":0,"isgiveintegral":1,"ipaid":null,"ipaprice":"0.00"},{"id":22184,"uid":24529,"title":"电源基础入门教程｜从AC\/DC、线性电源到开关电源，零基础系统学电源","desc":"进阶内容扫码联系助教获取","price":"0.00","content":"

    进阶内容<\/p>

    扫码联系助教获取<\/p>

    \"73f11a69938cff46d6103d9a725cfd.png\"<\/p>","orderby":0,"categoryid":16,"status":2,"keywords":null,"thumb":"https:\/\/api.fanyedu.com\/uploads\/image\/09\/b53eef416d6355ac900e1d9521013f.png","buycount":77,"count":35,"likes":0,"views":825,"comments":0,"collects":7,"reject":null,"invite":0,"createtime":"2026-10-19 11:24:18","updatetime":"2026-11-11 23:18:00","deletetime":null,"tags":["开关电源","线性电源","AC\/DC","变压器","电阻"],"annex":{"type":"0","url":"","pwd":""},"hot":0,"isgiveintegral":1,"ipaid":null,"ipaprice":"0.00"},{"id":22183,"uid":24529,"title":"GPT6真的会PCB自动布线了吗？","desc":"直播课件，扫码添加领取","price":"0.00","content":"

    直播课件，扫码添加领取<\/font><\/b><\/p>

    \"dd45a63b4261f9442395e6a1a6f07d.png\"<\/p>","orderby":0,"categoryid":12,"status":2,"keywords":null,"thumb":"https:\/\/api.fanyedu.com\/uploads\/image\/a5\/cb8a4102488394f953b5166004ab97.png","buycount":72,"count":1,"likes":0,"views":791,"comments":0,"collects":0,"reject":null,"invite":0,"createtime":"2026-09-17 15:59:04","updatetime":"2026-11-11 13:43:41","deletetime":null,"tags":["PCB","AI","AI画板"],"annex":{"type":"0","url":"","pwd":""},"hot":0,"isgiveintegral":1,"ipaid":null,"ipaprice":"0.00"},{"id":22182,"uid":44,"title":"电子设计软件入门到精通实战视频教程集合","desc":"全程手把手教学完整实操案例精选配套案例凡亿实战视频教程试听—大集合，大家可以根据自身情况来选择适合自己的课程，本套课程集合了凡亿教育的所有PCB实战视频的试听。Altium实战视频教程点击购买全套课程：『FY002』Altium 2层显示板","price":"0.00","content":"

    全程手把手教学<\/p>

    完整实操案例<\/p>

    精选配套案例<\/p>

    凡亿实战视频教程试听—大集合，大家可以根据自身情况来选择适合自己的课程，本套课程集合了凡亿教育的所有PCB实战视频的试听。<\/p>


    <\/p>

    Altium实战视频教程<\/strong><\/p>

    点击购买全套课程：<\/strong>『FY002』Altium 2层显示板PCB设计全程实战视频<\/a><\/p>

    点击购买全套课程<\/strong>：<\/strong>『FY003』Altium 4层核心板(菊花链拓扑)PCB设计全程实战视频<\/a><\/p>

    点击购买全套课程<\/strong>：<\/strong>『FY004』Altium 6层核心板全程实战高速PCB设计视频<\/a><\/p>

    点击购买全套课程<\/strong>：<\/strong>『FY005』Altium 8层DDR3高速PCB设计全程实战视频<\/a><\/p>

    点击购买全套课程<\/strong>：<\/strong>『FY006』Altium 6层(全志H8)VR(虚拟现实)PCB设计全程实战视频<\/a><\/p>

    点击购买全套课程<\/strong>：<\/strong>『FY007』Altium 6层PCB视频RK3288平板电脑凡亿PCB实战视频<\/a><\/p>

    点击购买全套课程<\/strong>：<\/strong>『FY017』Altium 两层51单片机电子竞赛PCB实战视频教程<\/a> <\/strong><\/p>

    点击购买全套课程<\/strong>：<\/strong>『FY023』Altium 8层HDI盲埋孔PCB实战视频教程<\/a><\/p>

    点击购买全套课程：<\/strong>『FY027』Altium 18入门速成零基础124讲实战视频教程<\/a><\/p>

    点击购买全套课程：<\/strong>『FY029』Altium Designer 1918 4层stm32主板电子设计<\/a><\/p>

    点击购买全套课程：<\/strong>『FY032』Altium19 2层MAX32660评估板实战视频教程<\/a><\/p>

    点击购买全套课程：<\/strong>『ADMK01』高速PCB模块化课程实战视频教程<\/a><\/p>

    点击购买全套课程：『FY037』AD23 2层4层FPC软硬结合板<\/a><\/strong>
    <\/p>

    点击购买全套课程：<\/strong>『FY039』AD20 6层2片DDR3  T点全志H3机顶盒高速PCB设计实战进阶视频<\/a><\/p>

    点击购买全套课程：<\/strong>『FY043』Altium Designer 20基于DM642的四层达芬奇开发板PCB设计实战视频<\/a><\/p>

    点击购买全套课程：<\/strong>『3DLIB』3D PCB封装库lib集成库实战视频教程常用电子元器件视频<\/a><\/p>

    点击购买全套课程：『FY062』AD22 16层-XILINX-FPGA高端芯片核心板高阶PCB设计<\/a><\/strong><\/p>

    点击购买全套课程：『FY073』AD23高速PCB电路设计8层工控板RK3588项目教程<\/a><\/strong>
    <\/p>

    点击购买全套课程：『FY081』Altium Designer24软件入门150讲基础操作实战<\/a><\/strong>
    <\/p>

    点击购买全套课程：『FY083』16层-XILINX-FPGA高端芯片核心板PCB设计实战教程案例<\/a><\/strong>
    <\/p>

    点击购买全套课程：『FY096』AD26 6层瑞芯微RK3576-AIOT主板PCB设计实训<\/a><\/strong><\/p>


    <\/p>

    Allegro实战视频教程<\/strong>
    <\/p>

    点击购买全套课程<\/strong>：<\/strong>『FY009』Allegro 软件操作130讲实战操作视频<\/a><\/p>

    点击购买全套课程<\/strong>：<\/strong>『FY010』Allegro 4层核心板PCB设计全程实战视频<\/a><\/p>

    点击购买全套课程<\/strong>：<\/strong>『FY011』Allegro 2层IPTV网络电视主板PCB设计全程实战视频<\/a><\/p>

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    <\/p>

    常见网口的实物介绍：<\/strong><\/p>

    \"a1.png\"\/<\/strong><\/p>

    常见网口的信号介绍：<\/strong><\/p>

    \"a2.png\"\/<\/strong><\/p>

    网口模块布局要点分析：<\/strong><\/p>

    \"a3.png\"\/<\/strong><\/p>

    <\/strong><\/p>

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    <\/b>
    <\/p>

    \"f2130ace15c97ff52ff1ece286b971.png\"\"O1CN01oOLccm1lWoPEPqjX1_!!3973574827.jpg\"\"O1CN01PLsqsJ1lWoPG39Qzg_!!3973574827.jpg\"\"O1CN01efvNqg1lWoP64eAoy_!!3973574827.jpg\"\"O1CN01lmprgP1lWoPG3AJ0z_!!3973574827.jpg\"\"O1CN017TkxUl1lWoPBimolJ_!!3973574827.jpg\"\"O1CN01OmjK7N1lWoPIShNNh_!!3973574827.jpg\"\"O1CN01h8n2qd1lWoPEPskIN_!!3973574827.jpg\"\"O1CN01iIiDCj1lWoPGJqa4Z_!!3973574827.jpg\"\"O1CN016BP6PG1lWoPHibnfT_!!3973574827.jpg\"\"O1CN01e9Ooyg1lWoPG3BB4x_!!3973574827.jpg\"<\/p>


    <\/p>                                 Cadence Allegro16.6 两层stm32系统主板

    \"9f83155eb6e59f6fb3ff3af39cccda.png\"\"64ff0e1b864d39d9534214920c9763.png\"\"c004f537efe2c8aaad4a399f902eac.png\"\"O1CN01ZtiqEY1lWoOC05Yzb_!!3973574827.png\"\"O1CN01J6UgH51lWoODSSCbT_!!3973574827.png\"\"O1CN01Mm7KwJ1lWoOBfO4Xr_!!3973574827.png\"\"O1CN01ipj6FZ1lWoOBy8mbO_!!3973574827.png\"\"O1CN01t2J5BZ1lWoOFzgCfA_!!3973574827.png\"\"O1CN01uYGYZL1lWoOBfOTTc_!!3973574827.png\"\"O1CN01AbIuaS1lWoPK1r1XI_!!3973574827.png\"\"O1CN01Opllik1lWoOX0c50Q_!!3973574827.gif\"<\/p>


    <\/p>                                            PADS VX2.4两层板STM32实战

    \"195f7c47727d15db99b83f71d463bb.png\"\"85ae998e19205aaf2964effe90ae0d.png\"\"e53ad18f855f2e1957eb2687694934.png\"<\/p>

    \"O1CN01gWGUZ71lWoNy1R77W_!!3973574827.jpg\"<\/p>

    \"O1CN013KDLcU1lWoOLUzVkW_!!3973574827.jpg\"<\/p>

    \"O1CN01GC0Im01lWoNsgGMIi_!!3973574827.jpg\"\"O1CN01M7geT41lWoNy1PZVo_!!3973574827.jpg\"\"O1CN0162aOPk1lWoOPtG6Px_!!3973574827.jpg\"\"O1CN01ix71HA1lWoOUKr2e3_!!3973574827.jpg\"\"O1CN01UIiiwK1lWoPJ5oYHV_!!3973574827.png\"\"O1CN01a83mXw1lWoOPtGq9C_!!3973574827.jpg\"<\/p>","orderby":0,"categoryid":12,"status":2,"keywords":null,"thumb":"https:\/\/api.fanyedu.com\/uploads\/image\/98\/61fa8465763f36540c2479da82b203.jpg","buycount":34,"count":117,"likes":0,"views":6710,"comments":0,"collects":14,"reject":null,"invite":0,"createtime":"2022-01-10 17:42:21","updatetime":"2026-11-11 23:03:25","deletetime":null,"tags":["PCB设计","硬件设计","AD21","PCB画板","电路设计"],"annex":null,"hot":0,"isgiveintegral":0,"ipaid":"course_99","ipaprice":"9.90"},{"id":21627,"uid":30525,"title":"【第12期】射频电路实战特训班","desc":"","price":"6999.00","content":"

    \"O1CN012Ii9OJ1J7ngUQqrtG_!!2207926780982.jpg\"
    <\/p>","orderby":0,"categoryid":17,"status":2,"keywords":null,"thumb":"https:\/\/api.fanyedu.com\/uploads\/image\/5c\/501dee9714174ab423b26d50e830c7.png","buycount":25,"count":27,"likes":0,"views":6297,"comments":0,"collects":4,"reject":"","invite":0,"createtime":"2024-06-03 17:41:03","updatetime":"2026-11-11 22:47:20","deletetime":null,"tags":["射频电路","版图","ADS","滤波器"],"annex":{"type":"0","url":"","pwd":""},"hot":0,"isgiveintegral":1,"ipaid":"course_9999","ipaprice":"6999.00"},{"id":418,"uid":58261,"title":"Cadence Allegro16.6两层stm32最小主板pcb视频教程","desc":"Cadence Allegro16.6 两层stm32最小系统主板pcb视频教程，PCB设计全功能模块，进阶实战案例。STM32F103C8T6最小系统方案，原理图库+SCH+PCB库+Layout设计，双面板电源+地分割解析。","price":"78.80","content":"

    <\/p>

    <\/p>

    <\/p>

    <\/p>","orderby":0,"categoryid":6,"status":2,"keywords":"Cadence Allegro16.6,stm32","thumb":"https:\/\/api.fanyedu.com\/public\/uploads\/image\/course\/20191014\/06525d3f57ba79d8cafd21b817daf7d4.png","buycount":5,"count":44,"likes":0,"views":12817,"comments":0,"collects":11,"reject":"","invite":0,"createtime":"2019-10-14 09:29:03","updatetime":"2026-11-11 21:47:44","deletetime":null,"tags":["allegro","cadence","差分线"],"annex":null,"hot":0,"isgiveintegral":0,"ipaid":"course_999","ipaprice":"99.90"},{"id":125,"uid":58261,"title":"2019凡亿Allegro3个月全能实战特训班PCB培训集训","desc":"学Cadence allegro还是找不到方法？半途想放弃？\n2019 凡亿Allegro3个月全能实战特训班来帮你！3个月集中特训、跟班指导、定向学习步骤、0基础~6层板、定期开班等，颁发结业证书。魔鬼式训练，让自己完美蜕变！","price":"3499.00","content":"

    \"详情页1_01.png\"\/\"详情页1_02.png\"\/<\/p>

    \"详情页1_03.png\"\/\"详情页1_04.png\"\/\"详情页1_05.png\"\/\"详情页1_06.png\"\/<\/p>

    \"详情页1_07.png\"\/\"详情页1_08.png\"\/\"详情页1_09.png\"\/\"详情页1_10.png\"\/\"详情页1_11.png\"\/\"详情页1_12.png\"\/\"详情页1_13.png\"\/\"详情页1_14.png\"\/\"详情页1_15.png\"\/<\/p>

    \"详情页1_16.png\"\/<\/p>","orderby":0,"categoryid":6,"status":2,"keywords":"Allegro特训班，Allegro培训，Allegro","thumb":"https:\/\/api.fanyedu.com\/public\/uploads\/image\/course\/20190306\/674d4799275da468bd509e31af4a33f2.png","buycount":0,"count":0,"likes":0,"views":7651,"comments":0,"collects":2,"reject":"","invite":0,"createtime":"2019-03-06 16:46:55","updatetime":"2026-11-11 22:00:16","deletetime":null,"tags":["allegro","模拟电源","电流"],"annex":null,"hot":0,"isgiveintegral":0,"ipaid":"course_9999","ipaprice":"3499.00"},{"id":22178,"uid":198799,"title":"WB BGA基板设计全流程规范教程 — 从设计界面设置到Gerber输出","desc":"本课程系统讲解 WBBGA（Wire Bonding BGA）基板设计全流程规范，涵盖从基板设计流程到最终第三方文件输出的完整工作流。适合 PCB 设计工程师、基板设计人员及对 Wire Bonding 封装设计感兴趣的技术人员学习。","price":"10000.00","content":"

    本课程系统讲解 WBBGA（Wire Bonding BGA）基板设计全流程规范，涵盖从基板设计流程到最终第三方文件输出的完整工作流。适合 PCB 设计工程师、基板设计人员及对 Wire Bonding 封装设计感兴趣的技术人员学习。<\/p>","orderby":0,"categoryid":57,"status":2,"keywords":null,"thumb":"https:\/\/api.fanyedu.com\/uploads\/image\/e8\/03cfef93429f2faa600dc5373c1a18.png","buycount":1,"count":14,"likes":0,"views":711,"comments":0,"collects":0,"reject":null,"invite":0,"createtime":"2026-07-25 23:07:57","updatetime":"2026-11-11 20:12:31","deletetime":null,"tags":["PCB设计","WireBonding","基板设计","封装设计","WBBGA"],"annex":{"type":"1","url":"","pwd":""},"hot":0,"isgiveintegral":1,"ipaid":null,"ipaprice":"0.00"},{"id":663,"uid":7433,"title":"Altium Designer17\/18 8层HDI盲埋孔视频教程","desc":"说明：1、平台上只放了试听部分的课程，可以在本平台下单，之后联系下方助教进行授权全套课程播放2、可以淘宝平台购买之后进行全套视频授权（点击右侧链接打开淘宝店铺→）：https:\/\/item.taobao.com\/item.htm?spm=a","price":"888.00","content":"

    说明：<\/strong><\/span><\/p>

    1、平台上只放了试听部分的课程，可以在本平台下单，之后联系下方助教进行授权全套课程播放<\/strong><\/span><\/p>

    2、可以淘宝平台购买之后进行全套视频授权（点击右侧链接打开淘宝店铺→）：https:\/\/item.taobao.com\/item.htm?spm=a1z10.5-c-s.w4002-21870440440.14.216e6f5006NwKe&id=598594081307<\/a><\/strong><\/span><\/p>

    3、助教联系方式（微信扫一扫添加）：<\/strong><\/span><\/p>

    \"1596080417690812.png\"<\/p>

    \"1596523680988327.jpg\"\"1596523684911583.jpg\"\"1596523698809763.jpg\"\"1596523698358361.jpg\"\"1596523698582653.jpg\"\"1596523699100063.jpg\"\"1596523699499655.jpg\"\"1596523699371910.jpg\"\"1596523700341575.jpg\"\"1596523700839143.jpg\"\"1596523700916933.jpg\"\"1596523700900975.jpg\"\"1596080749754284.jpg\"\"1596523701612510.jpg\"\"1596523701231110.jpg\"\"1596523701938946.jpg\"\"1596523701713163.jpg\"\"1596523702431807.jpg\"<\/p>","orderby":0,"categoryid":5,"status":2,"keywords":"8层Altium Designer教程","thumb":"https:\/\/api.fanyedu.com\/public\/uploads\/image\/course\/20200804\/ced0853873f85a9b11e8d4989781fed7.jpg","buycount":1,"count":1,"likes":0,"views":7722,"comments":0,"collects":0,"reject":"","invite":0,"createtime":"2020-08-04 14:49:24","updatetime":"2026-11-11 23:41:20","deletetime":null,"tags":["8层Altium Designer教程","Altium Designer17\/18","HDI盲埋孔教程"],"annex":{"type":"0"},"hot":0,"isgiveintegral":0,"ipaid":"course_9999","ipaprice":"888.00"},{"id":617,"uid":24869,"title":"Cadence17.4 GD32 ARM高速电路PCB硬件设计实战[第一部]","desc":"Cadence17.4软件的界面变化后，软件的功能也进行了很大的调整，更加能够适应高速电路和高密度，柔性和刚柔结合设计，背钻异形槽孔的设计等。","price":"288.00","content":"

    【课程亮点】：<\/strong><\/span><\/p>

    1、Cadence17.4软件的界面变化后，软件的功能也进行了很大的调整，更加能够适应高速电路和高密度，柔性和刚柔结合设计，背钻异形槽孔的设计等。<\/p>

    2、GD32E230是业界领先的半导体供应商兆易创新提出的基于Arm®Cortex®-M23内核MCU的最新产品，GD32E230系列超值型微控制器。<\/p>

    3、秉承GD32MCU家族的优秀基因并持续引领Cortex®-M23全新内核的应用领域向纵深拓展，这系列器件集成了片上存储器、定时器、数据转换器和众多接口外设，并提供了全新的可编程性能和紧凑的封装尺寸。<\/p>

    4、GD32E230特别适用于需要精密MCU和空间受限的应用，如光学模块、光电转换、光纤网络、基站系统、精密仪器、工业控制和自动化系统等。<\/p>

    <\/p>

    【课程优势】：<\/strong><\/span><\/p>

    1、采用GD32E230芯片为核心的硬件设计基础，外扩了FLASH，EPROM，步进电机驱动电路，IR红外传感器，蜂鸣器电路，距离传感器，串口电路，后背电池电路，RTC时钟电路，电源电路，红外遥控器接口电路，BOOT电路，指示灯电路，晶振电路，LDO电路，软开关电路等。<\/p>

    2、采用实例的方式讲解了GD32GE230元件手册精读，元件特征分析，电路设计和原理构思，电路功能分析等。在Cadence17.4平台下进行的原理图设计和PCB设计的实现方法和系列经典操作内容。<\/p>

    3、穿插讲述了Cadence17.4原理图工具的使用方法和GD32E230硬件设计外围电路配置方法，各种常用芯片的使用等内容。力增用一个从无到有的设计方式，从原理图的设计构思开始，通过视频的方式带领大家从原理图设计到错误检查，网络表生产，封装库制作，同步进入PCB，3D模型制作，布局，规则，布线，文件输出的操作全流程和设计方法等经典操作。<\/p>

    <\/p>

    【课程案例图】：<\/span><\/strong><\/p>

    \"1589612343363534.png\"<\/p>

    <\/p>

    \"1589612359227113.png\"<\/p>

    <\/p>

    \"1589612375295591.png\"<\/p>

    <\/p>

    【讲师介绍】：<\/strong><\/span><\/p>

    李老师，资深Cadence系列培训课程讲师，有深厚信号仿真功底，熟悉模拟电路和数字电路及程序设计，一直从事电子类的产品设计开发工作，曾经任职Layout工程师、电子工程师、嵌入式工程师、高级硬件工程师，信号分析工程师，高级工程师，经理等职务。<\/span><\/p>

    从2016年开始，已经多次推出Cadence系列培训课程，每次课程课程安排详实，内容丰富，受到参训工程师的好评，影响上万工程师。<\/span><\/p>","orderby":0,"categoryid":20,"status":2,"keywords":"Cadence17.4 GD32 ARM高速电路PCB设计硬件实战","thumb":"https:\/\/api.fanyedu.com\/public\/uploads\/image\/course\/20200516\/146c7f84154ccbf93c281a00756c6906.jpg","buycount":7,"count":50,"likes":0,"views":9172,"comments":0,"collects":1,"reject":"","invite":0,"createtime":"2020-05-15 10:50:50","updatetime":"2026-11-11 23:12:46","deletetime":null,"tags":["Cadence Sigrity","硬件设计","高速电路"],"annex":null,"hot":0,"isgiveintegral":0,"ipaid":"course_9999","ipaprice":"288.00"},{"id":20530,"uid":30525,"title":"射频电路开发设计基础ADS射频前端开发技术实战视频教程 凡亿教育","desc":"课程具有较高的实践性，确保学员活学活用，可以及时应用到工程项目中；","price":"2399.00","content":"

    <\/p>","orderby":0,"categoryid":17,"status":2,"keywords":"射频电路开发设计基础ADS射频前端开发技术实战视频教程 凡亿教育","thumb":"https:\/\/api.fanyedu.com\/public\/uploads\/image\/course\/20210616\/148615abdd5c59443dfefc9db6b4f286.jpg","buycount":3,"count":1,"likes":0,"views":6937,"comments":0,"collects":6,"reject":"","invite":0,"createtime":"2021-06-16 17:17:30","updatetime":"2026-11-11 22:37:53","deletetime":null,"tags":["ADS","射频","射频电路"],"annex":null,"hot":0,"isgiveintegral":0,"ipaid":"course_9999","ipaprice":"2399.00"},{"id":21577,"uid":24529,"title":"Mentor PADS VX2.14软件速成120讲视频教程","desc":"","price":"28.80","content":"

    \"12af93325107d3b8a7d1c83a29c5c5.jpg\"
    <\/p>","orderby":0,"categoryid":7,"status":2,"keywords":null,"thumb":"https:\/\/api.fanyedu.com\/uploads\/image\/75\/54d3c9c8bf08fc5e02de44d41af83b.jpg","buycount":9,"count":119,"likes":0,"views":4124,"comments":0,"collects":7,"reject":null,"invite":0,"createtime":"2024-04-24 09:40:24","updatetime":"2026-11-11 19:23:22","deletetime":null,"tags":["pads","VX2.14","Mentor","PCB设计"],"annex":{"type":"0","url":"","pwd":""},"hot":0,"isgiveintegral":1,"ipaid":"course_299","ipaprice":"29.90"}],"article":[{"id":126159,"uid":146355,"title":"笔段液晶屏驱动点阵液晶显示芯片VK1056C","status":1,"categoryid":28,"thumb":"https:\/\/api.fanyedu.com\/uploads\/image\/6f\/d50abb267e08744b5bd2a59f481011.png","multiple_thumb":["https:\/\/api.fanyedu.com\/uploads\/image\/6f\/d50abb267e08744b5bd2a59f481011.png","https:\/\/api.fanyedu.com\/uploads\/image\/7f\/6bad183c41287debd4c8f625316b1c.png","https:\/\/api.fanyedu.com\/uploads\/image\/b6\/87b0aafb4a51be45e3ef580165fb44.png"],"content":"

    概述：<\/p>

    VK1056C是一个点阵式存储映射的LCD驱动器，可支持最大56点（14SEG×4COM）的LCD屏,也支持2COM和3COM的LCD屏。单片机可通过三条通信线配置显示参数和发送显示数据，也可通过指令进入省电模式。S102+172<\/p>


    <\/p>

    正文：<\/p>

    VK1056C是一个最多支持56点（14SEG×4COM）的LCD驱动器，它可以由软件配置成1\/2、1\/3偏置电压（bias），也可以配置成1\/2DUTY（2COM）、1\/3DUTY（3COM）或者1\/4DUTY（4COM）。有3个通信脚。\/CS 脚信号用来使能\/禁止和主控制器之间的通信，\/CS 高电平禁止并初始化内部时序，\/CS低电平使能。DATA脚是串行数据输入\/输出脚，写数据或写入命令必需通过数据脚。\/WR脚是写时钟输入脚，DATA 脚上的数据、地址或者命令在 \/WR 信号上升沿被读到 VK1056C。<\/p>


    <\/p>

    应用领域：<\/p>

    • 电表\/瓦斯表<\/p>

    • 按摩仪\/美容仪<\/p>

    • 医用仪器<\/p>

    • 车载设备<\/p>

    • 冷气机\/暖风机<\/p>


    <\/p>

    特点：<\/p>

    • 工作电压 2.4-5.2V<\/p>

    • 内置256 kHz RC振荡器（上电默认）<\/p>

    • 偏置电压（BIAS）可配置为1\/2、1\/3<\/p>

    • COM周期（DUTY）可配置为1\/2、1\/3、1\/4<\/p>

    • 内置显示RAM为14×4位<\/p>

    • 省电模式（通过关显示和关振荡器进入）<\/p>

    • 3线串行接口<\/p>

    • VLCD脚调节LCD电压<\/p>

    • 软件配置LCD显示参数<\/p>

    • 写命令和写数据2种命令格式<\/p>

    • 写显示数据地址自动加1<\/p>

    • VLCD脚提供LCD驱动电压（≤VDD）<\/p>

    • 封装<\/p>

    SSOP24(208mil)(8.2mm × 5.3mm PP=0.65mm) <\/p>

    \"d8ad744f-1e39-4509-8211-ffa9e662ea7b.png\"\"0762f10b32c0479dda1d21de29eb39d2.png\"\"7acc1835-a12d-492e-989e-7fcd2f267fae.png\"<\/p>

    永嘉微电\/VINKA原厂直销，工程服务技术支持，主营LCD\/LED驱动IC\/触摸IC<\/p>


    <\/p>","keyword":null,"desc":"概述：VK1056C是一个点阵式存储映射的LCD驱动器，可支持最大56点（14SEG×4COM）的LCD屏,也支持2COM和3COM的LCD屏。单片机可通过三条通信线配置显示参数和发送显示数据，也可通过指令进入省电模式。S102+172正文","tags":[],"views":1,"likes":0,"comments":0,"collects":0,"isreprint":0,"reprinturl":"","reject":null,"invite":null,"createtime":"2026-11-11 17:09:10","updatetime":"2026-11-11 17:09:16","deletetime":null,"orderby":0,"isgiveintegral":0,"istop":0,"day":"11","month":"11"},{"id":126158,"uid":24529,"title":"启云方EDA-多拓扑的等长处理","status":2,"categoryid":12,"thumb":"https:\/\/api.fanyedu.com\/uploads\/ueditor\/image\/20261111\/1794385229110782.png","multiple_thumb":["https:\/\/api.fanyedu.com\/uploads\/ueditor\/image\/20261111\/1794385229110782.png","https:\/\/api.fanyedu.com\/uploads\/ueditor\/image\/20261111\/1794385229836450.png","https:\/\/api.fanyedu.com\/uploads\/ueditor\/image\/20261111\/1794385229543956.png"],"content":"

    启云方EDA-多拓扑的等长处理<\/h2>

    1 点到点绕线<\/h3>

    点到点绕线简单来说就是从一个器件到另一个器件进行等长，然后创建Match Group，将需要等长的网络一条一条地绕到目标长度，如图8-1所示。<\/p>

    \"图8-1<\/p>

    图8-1  点到点绕线<\/p>

    若主干道上串联有电阻，则可以创建Enet模型，让串联电阻两端的网络一样，再通过创建Pin Pair的方法进行点到点绕线。<\/p>

    2 菊花链结构<\/h3>

    在PCB设计中，信号布线从U1出发途经U2，再由U2到达U3的信号结构称为菊花链结构，如图8-2所示。在这种连接方法中，不会形成网状的拓扑结构，只有相邻的元件之间才能直接通信。<\/p>

    \"图8-2<\/p>

    图8-2  菊花链结构<\/p>

    两片DDR菊花链结构示意图如图8-3所示，这是两片DDR采用菊花链结构的布线方式，先由CPU连接至第一片DDR，再由第一片DDR连接至第二片DDR。对于菊花链等长网络，应先分别创建两个Pin Pair，再创建两个Match Group，分别进行等长；先从CPU到第一片DDR进行一次点到点绕线等长，再从第一片DDR到第二片DDR进行一次点到点绕线等长。菊花链等长规则设置如图8-4所示。<\/p>

    \"图8-3<\/p>

    图8-3  两片DDR菊花链结构示意图<\/p>

    \"图8-4<\/p>

    图8-4  菊花链等长规则设置<\/p>

    3 T形结构<\/h3>

    T形结构如图8-5所示，星型网络结构常被称为T形结构。DDR2相比之前的DDR规范没有延时补偿功能，因此时钟线与数据选通信号的时序裕量相对比较紧张。为了不使每片DDR的时钟线与数据选通信号的长度误差太大，一般采用T形结构，T形结构的分支应尽量短，长度也应相等。<\/p>

    \"图8-5<\/p>

    图8-5  T形结构<\/p>

    4 T形结构分支等长法<\/h3>

    T形结构分支等长法类似菊花链结构，主要是利用节点和多版本的操作，把等长转换为点对点等长，实现L+L'=L+L"  =L1+L1'=L2+L2'，即CPU焊盘到每片DDR焊盘的布线长度等长，如图8-6所示。<\/p>

    \"图8-6<\/p>

    图8-6  T形结构分支等长法<\/p>

    5 快速创建Match Group<\/h3>

    （1）对有串组的网络进行Enet模型的创建，具体方法可以参考9.1.5节。<\/p>

    （2）执行“Tools”→“Constraints Editor”命令，打开规则模型管理器，选择“Electrical”→“Relative Propagation Delay”选项；对DDR低八位数据线添加Match Group，可以滑动鼠标多选或单击创建的“NGRP”组选择网络，如图8-7所示。<\/p>

    （3）在弹出的“Create MatchGroup”对话框中设置Match Group的名称，单击“OK”按钮，如图8-8所示。<\/p>

    \"图8-7<\/p>

    图8-7  创建Match Group<\/p>

    \"图8-8<\/p>

    图8-8  Match Group命名<\/p>

    （4）如图8-9所示，对等长规则进行设置，单击“OK”按钮进行添加。<\/p>

    Scope：有Global（全局的）和Local（局部的）两种，一般选择Global。<\/p>

    Delta Type和Tol Type：有Time(ps)（皮秒）和Length(mil)（长度）两种，一般选择Length(mil)。<\/p>

    Delta：在目标线的基础上是否增加，一般选择不增加，建议设置为0。<\/p>

    Tolerance：误差范围。<\/p>

    Target：选择其中一根为目标线，后期可以更改。<\/p>

    \"图8-9<\/p>

    图8-9  等长规则设置<\/p>

    （5）利用蛇形布线的命令进行等长，将该网络组的长度调至等长误差内，显示绿色即可，如图8-10所示。<\/p>

    \"图8-10<\/p>

    图8-10  网络等长示意图<\/p>

    在通过多选网络创建Match Group并弹出图8-11所示的警告对话框时，单击“OK”按钮继续。如图8-12所示，在弹出的匹配组设置对话框中，单击“Member”栏下的按钮，在“Add_Match_Group”对话框中依次输入需要匹配的两个元件的位号，完成手动匹配。<\/p>

    \"图8-11<\/p>

    图8-11  警告对话框<\/p>

    \"图8-12<\/p>

    图8-12  手动匹配<\/p>

    <\/p>","keyword":null,"desc":"启云方EDA-多拓扑的等长处理1 点到点绕线点到点绕线简单来说就是从一个器件到另一个器件进行等长，然后创建Match Group，将需要等长的网络一条一条地绕到目标长度，如图8-1所示。图8-1 点到点绕线若主干道上串联有电阻，则可以创建","tags":["启云方EDA","PCB设计"],"views":41,"likes":0,"comments":0,"collects":0,"isreprint":0,"reprinturl":null,"reject":null,"invite":0,"createtime":"2026-11-11 16:20:57","updatetime":"2026-11-11 23:16:27","deletetime":null,"orderby":0,"isgiveintegral":0,"istop":0,"day":"11","month":"11"},{"id":126157,"uid":24529,"title":"启云方EDA-蛇形布线","status":2,"categoryid":12,"thumb":"https:\/\/api.fanyedu.com\/uploads\/ueditor\/image\/20261111\/1794385174745326.png","multiple_thumb":["https:\/\/api.fanyedu.com\/uploads\/ueditor\/image\/20261111\/1794385174745326.png","https:\/\/api.fanyedu.com\/uploads\/ueditor\/image\/20261111\/1794385174630475.png","https:\/\/api.fanyedu.com\/uploads\/ueditor\/image\/20261111\/1794385174377129.png"],"content":"

    启云方EDA-蛇形布线<\/h2>

    1 单端蛇形布线<\/h3>

    在PCB设计中，蛇形布线主要是针对一些高速的并行总线来讲的。由于这类并行总线往往有多条数据信号基于同一个时钟采样，每个时钟周期可能要采样2次（DDR SDRAM），甚至4次，而随着芯片运行频率的提高，信号传输延迟对时序影响的比重越来越大。为了保证在数据采样点（时钟的上升沿或下降沿）能正确采集所有信号的值，必须对信号传输延迟进行控制。蛇形布线的目的就是尽可能地减小所有相关信号在PCB上传输延迟的差异，保证时序的匹配。<\/p>

    \"图7-1<\/p>

    图7-1  等长参数设置<\/p>

    （1）在启云方PCB设计软件中，等长布线之前建议完成PCB的连通性检查，并且建立对应的总线网络组，因为等长布线是在既有的布线上进行的，并不是一开始就走成蛇形布线，等长时也是基于一组中的最长线进行的。<\/p>

    （2）执行“Route”→“Tune”命令，激活等长命令，在“Options”面板中设置等长参数，如图7-1所示。<\/p>

    Style：提供3种蛇形布线的样式。<\/p>

    Accordion：折叠线。<\/p>

    Trombone：环绕折叠线。<\/p>

    Sawtooth：锯齿线。<\/p>

    Centered：选择线段中心。<\/p>

    Gap：两条蛇形圆弧线之间的间距，一般需要满足3W（3倍线宽）原则。<\/p>

    Corners：拐角的角度，一般选择45°。<\/p>

    Miter：最小的拐角宽度，一般设置为1倍线宽。<\/p>

    Allow DRCs：等长时允许产生DRC，不建议勾选。<\/p>

    Differentical Pair Phase Tune：勾选可用于差分对之间的对内等长。<\/p>

    Bump Style：有两种模式选择，Line（线）和Arc（圆弧），一般选择Line。<\/p>

    Bump Length（L）：弯折凸线长度，建议大于3倍线宽。<\/p>

    Bump Height（H）：弯折凸线高度，建议大于1倍线距，小于2倍线距。<\/p>

    Length added per bump：增加长度，默认配置，系统会自动计算长度大小。<\/p>

    2 差分蛇形布线<\/h3>

    USB、SATA、PCIe等串行信号并没有上述并行总线的时钟概念，其时钟是隐含在串行数据中的。数据发送方将时钟包含在数据中发出，数据接收方通过收到的数据恢复出时钟信号。这类串行总线没有上述并行总线等长布线的概念，但因为这些串行信号都采用差分信号，为了保证差分信号的质量，一般会要求等长布线且按总线规范的要求进行阻抗匹配的控制。<\/p>

    （1）差分蛇形布线类似单端蛇形布线，也是先进行差分布线，再执行“Route”→“Tune”命令，激活等长命令，在“Options”面板中设置等长参数，设置方法与单端蛇形布线相同，如图7-2（a）所示。<\/p>

    （2）单击需要等长的差分布线，并滑动鼠标，即开始差分蛇形布线，如图7-2（b）所示。<\/p>

    \"图7-2<\/p>

    \"图7-2<\/p>

    图7-2  差分蛇形布线<\/p>

    （a）（b）<\/p>

    （3）为了满足差分对内的时序匹配，一般差分对内也需要进行等长，误差一般要求在5mil以内。在激活等长命令后勾选“Differentical Pair Phase Tune”复选框并对下方参数进行设置，如图7-3（a）所示；或者激活等长命令后，选中需要进行等长的差分布线并右击，选择“Single trace mode”选项，如图7-3（b）所示，对差分布线的其中一根进行绕线。常见差分对内等长方式如图7-4所示。<\/p>

    \"图7-3<\/p>

    \"图7-3<\/p>

    图7-3  差分布线单根等长命令<\/p>

    （a）（b）<\/p>

    \"图7-4<\/p>

    图7-4  常见差分对内等长方式<\/p>

    <\/p>","keyword":null,"desc":"启云方EDA-蛇形布线1 单端蛇形布线在PCB设计中，蛇形布线主要是针对一些高速的并行总线来讲的。由于这类并行总线往往有多条数据信号基于同一个时钟采样，每个时钟周期可能要采样2次（DDR SDRAM），甚至4次，而随着芯片运行频率的提高，信","tags":["启云方EDA","PCB设计"],"views":34,"likes":0,"comments":0,"collects":0,"isreprint":0,"reprinturl":null,"reject":null,"invite":0,"createtime":"2026-11-11 16:19:56","updatetime":"2026-11-11 23:45:00","deletetime":null,"orderby":0,"isgiveintegral":0,"istop":0,"day":"11","month":"11"}],"notes":[{"id":126143,"uid":19578,"title":"PoE硬件开发外包公司推荐：PSE\/PD供电、隔离电源与端口保护如何验收？","status":2,"categoryid":35,"thumb":"https:\/\/static5.arrow.com\/pdfs2\/2019\/2\/26\/16\/49\/54\/347115\/mcs_\/manual\/pd70101_typicalapplication_4.jpg","multiple_thumb":"","content":"

    PoE硬件开发外包公司推荐：PSE\/PD供电、隔离电源与端口保护如何验收？<\/h1>

    PoE项目找硬件开发外包团队，不能只问“能不能把PoE芯片接起来”。真正影响产品能否稳定工作的，是供电角色、功率等级、检测与分类、端口保护、隔离方案、热设计，以及样机阶段能否按标准场景完成验证。<\/p><\/div>

    企业常见的PoE项目包括网络摄像机、无线接入点、工业以太网终端、PoE交换机和各类受电设备。看起来都是网线同时传输数据与电力，但设备处在供电端PSE还是受电端PD，决定了设计重点完全不同。若在需求阶段没有把角色和功率预算说清楚，后续很容易出现电源架构选错、端口保护不足、满载温升过高，或者与交换机协商不稳定等问题。<\/p>

    一、先区分PSE与PD：项目架构不能混为一谈<\/h2>

    PSE（Power Sourcing Equipment）负责向网线提供电力，PD（Powered Device）则从网线取电。PSE设计要关注端口检测、分类、供电开关、端口电流监测和故障切断；PD设计则要关注受电接口、极性适配、浪涌保护、PD控制器、DC\/DC变换和后级负载供电。若是多端口交换机，还需要评估端口总功率预算、同时启动策略和散热条件。<\/p>

    功率等级也不能只写一个“PoE 30W”。Microchip对IEEE标准的说明列出了Type 1至Type 4的PSE功率等级：常见的802.3af、802.3at以及802.3bt Type 3\/Type 4对应不同端口功率范围；PD端可获得的保证功率会受到线缆损耗影响。因此，需求书中应明确标准类型、端口数量、单端口功率、总功率预算，以及是否采用两对线或四对线供电。<\/p>

    \"0.png\"<\/figure>

    二、外包评估时，重点核对这五个工程环节<\/h2>

    1. 检测、分类与上电时序<\/h3>

    PoE不是把48V直接加到网线上。PSE需要先识别符合要求的PD，再完成分类和供电管理。评估团队时，应要求其说明检测电阻、分类电流、维持供电特征以及异常拔插时的处理方式。对于PD端，则要核对输入范围、启动浪涌、欠压锁定和重新上电行为。<\/p>

    2. 网口前端与浪涌保护<\/h3>

    RJ45、网络变压器、共模器件、整流桥、TVS和接地策略需要一起评审。不能只看单个TVS的电压参数，还要考虑保护器件的寄生电容是否影响数据通道、回流路径是否合理，以及接口外壳、机壳地和数字地的关系。不同端口结构、线缆环境和设备安装位置，可能带来不同的ESD\/EFT\/浪涌验证要求。<\/p>

    3. 隔离电源与功率器件选型<\/h3>

    PD端后级常需要把网线输入转换为系统所需的多路电压。选型时要把输入范围、输出功率、效率、开关频率、变压器结构、MOSFET耐压、整流器件损耗和环路稳定性放在一起评估。若采用隔离方案，还要核对变压器绝缘结构、爬电距离、电气间隙和安规要求，不能等到PCB完成后才补充。<\/p>

    4. PCB布局与热设计<\/h3>

    高电流路径要短而清晰，开关节点面积要受控，输入旁路电容应靠近功率器件，功率地与信号地按实际拓扑规划。多端口PSE还要考虑端口之间的热耦合、MOSFET散热、铜箔载流能力和机壳散热条件。外包团队如果只交原理图、不提供关键布局审查意见，后续调试风险会留给客户。<\/p>

    5. 样机测试与问题闭环<\/h3>

    至少要规划空载、额定负载、最大功率、启动、热稳态、插拔、短路\/过载保护以及不同供电端兼容性测试。对多端口设备，还应测试多个端口同时带载时的功率分配和温升。每个问题要记录复现条件、测量点、波形、根因判断、整改版本和复测结果。<\/p>\"工程决策对照表\"

    三、不同PoE标准的功率预算怎么写进需求书？<\/h2>

    下面的数值用于前期识别标准等级，不应代替具体器件数据手册和标准条文。尤其要区分PSE端口可提供功率与PD端可保证获得的功率，报价时应明确按哪一侧作为设计边界。<\/p>

    四、企业询价前，建议准备哪些资料？<\/h2>