朱建海-DCDC模块的PCB设计作业

pcb大头兵 · 发表于 2025-1-14 22:42:07

本次作业心得：

创建","marks":[]},{"text":"room","marks":[{"type":"backgroundColor","value":"#FFB729"}]},{"text":"，","marks":[]}]}],"state":{"index":5}},{"type":"block","id":"Z3LL-1736677565341","name":"paragraph","data":{},"nodes":[{"type":"text","id":"aviz-1736677565340","leaves":[{"text":"①全选要拷贝的器件,“D”-\"M\"-\"从选择的器件产生矩形的room（T）\"，源和目标都要创建room,也就是两个room","marks":[]}]}],"state":{}},{"type":"block","id":"VCN7-1736677556134","name":"paragraph","data":{},"nodes":[{"type":"text","id":"s7RL-1736677556133","leaves":[{"text":"②通道号不一致的情况下，需要将目标的通道号与源的通道号一致。全选源room,右下角“panels”-\"pcblist\",选择“edit”,'selet objects',include-仅显示-compo***。\"Designator\"进行排序，“chanel offset”全选，crtl+c复制；","marks":[]}]}],"state":{}},{"type":"block","id":"DOGs-1736677863431","name":"paragraph","data":{},"nodes":[{"type":"text","id":"pOSI-1736677863430","leaves":[{"text":"*全选目标room.\"Designator\"进行排序，“chanel offset”全选，crtl+v粘贴；","marks":[]}]}],"state":{}},{"type":"block","id":"65GV-1736677348635","name":"paragraph","data":{},"nodes":[{"type":"text","id":"r3jU-1736677348634","leaves":[{"text":"*通过chanel-offst匹配通道号，“D”-\"M\"-\"拷贝room格式（C）\"","marks":[]}]}],"state":{}},{"type":"block","id":"MzIZ-1734081675821","name":"paragraph","data":{"version":1},"nodes":[{"type":"text","id":"HqMr-1734081675820","leaves":[{"text":"tips：如果布线时room拷贝不行的话，筛选tracks,vias，regions，polygon 进行拷贝粘贴，然后再进行网络修改，重新灌铜等操作","marks":[]}]}],"state":{}},{"type":"block","id":"IbIs-1736841061479","name":"list-item","data":{"listId":"kp6I-1736671253270","listType":"ordered","listLevel":1},"nodes":[{"type":"text","id":"c0aB-1736841061476","leaves":[{"text":"过孔孔径设置公式：2*H±2mil,H孔洞径一般设置为12mil,孔盘=2*12-2=22mil，需要在\"customize\"-“PCB editor”中设置，一般需要设置“tented”，进行盖油处理","marks":[]}]}],"state":{"index":6}},{"type":"block","id":"OqmG-1736842879867","name":"list-item","data":{"listId":"kp6I-1736671253270","listType":"ordered","listLevel":1},"nodes":[{"type":"text","id":"WNrR-1736842879865","leaves":[{"text":"忽略器件内部规则，\"DR\"-clearance-\"忽略同一封装内的焊盘间距\"","marks":[]}]}],"state":{"index":7}},{"type":"block","id":"7kNm-1729772991812","name":"heading","data":{"level":"h2"},"nodes":[{"type":"text","id":"xh9k-1729772991813","leaves":[{"text":"5.1布局","marks":[]}]}],"state":{}},{"type":"block","id":"TQ4z-1736674622398","name":"list-item","data":{"listId":"VYtw-1736674731397","listType":"unordered","listLevel":1},"nodes":[{"type":"text","id":"NxYm-1736674622399","leaves":[{"text":"如果数据手册上有，直接按照数据手册进行绘制PCB","marks":[]}]}],"state":{"index":1}},{"type":"block","id":"38rF-1736669377308","name":"list-item","data":{"listId":"j1SI-1736669385883","listType":"ordered","listLevel":1},"nodes":[{"type":"text","id":"bLZT-1736669377309","leaves":[{"text":"拿到PCB元件先导入，阵列排布，shootkey:TOL","marks":[]}]}],"state":{"index":1}},{"type":"block","id":"JiA0-1736669788451","name":"list-item","data":{"listId":"j1SI-1736669385883","listType":"ordered","listLevel":1},"nodes":[{"type":"text","id":"BhqH-1736669788443","leaves":[{"text":"绘画板框时，机械层PL画线；EOS设置原点；DSD设置板子形状，需要先选中板框","marks":[]}]}],"state":{"index":2}},{"type":"block","id":"TSeZ-1736670136723","name":"list-item","data":{"listId":"j1SI-1736669385883","listType":"ordered","listLevel":1},"nodes":[{"type":"text","id":"It0u-1736670136714","leaves":[{"text":"4个片脚固定孔设计，一般按照片脚中心x,y各偏移5mm","marks":[]}]}],"state":{"index":3}},{"type":"block","id":"X6bD-1736670252160","name":"list-item","data":{"listId":"j1SI-1736669385883","listType":"ordered","listLevel":1},"nodes":[{"type":"text","id":"iSIL-1736670252151","leaves":[{"text":"层叠管理器（DK），进行层叠管理","marks":[]}]}],"state":{"index":4}},{"type":"block","id":"COLj-1729773237735","name":"list-item","data":{"baseIndex":2,"listId":"j1SI-1736669385883","listType":"ordered","listLevel":1},"nodes":[{"type":"text","id":&quot

f0C-1729773237736","leaves":[{"text":"布局之前先进行预布局，按功进行模块化分析","marks":[]}]}],"state":{"index":5}},{"type":"block","id":"ixdI-1736671693048","name":"list-item","data":{"baseIndex":2,"listId":"j1SI-1736669385883","listType":"ordered","listLevel":1},"nodes":[{"type":"text","id":"2dzZ-1736671693046","leaves":[{"text":"模块化布局遵循以下原则：","marks":[]}]}],"state":{"index":6}},{"type":"block","id":"ZlHw-1736671710409","name":"paragraph","data":{},"nodes":[{"type":"text","id":"4qZ1-1736671710408","leaves":[{"text":"①根据功能，进行","marks":[]},{"text":"先大后小","marks":[{"type":"backgroundColor","value":"#FFB729"}]},{"text":"的原则，先放置大的功能模块，再放置小的功能模块","marks":[]}]}],"state":{}},{"type":"block","id":"pCgs-1736671811496","name":"paragraph","data":{},"nodes":[{"type":"text","id":"uPiW-1736671811495","leaves":[{"text":"②根据","marks":[]},{"text":"信号流向","marks":[{"type":"backgroundColor","value":"#FFB729"}]},{"text":"原则，根据信号的输入输出端，初步确定各个元器件的摆放位置，信号走向尽量按照“一字型”和“L字型”","marks":[]}]}],"state":{}},{"type":"block","id":"iX5O-1736672308260","name":"paragraph","data":{},"nodes":[{"type":"text","id":"Q56g-1736672308258","leaves":[{"text":"*","marks":[]},{"text":"就近原则","marks":[{"type":"backgroundColor","value":"#FFB729"}]},{"text":"，主体与电阻容感等一个整体的部分相互靠近","marks":[]}]}],"state":{}},{"type":"block","id":"s8Kj-1729773453077","name":"list-item","data":{"listId":"j1SI-1736669385883","listType":"ordered","listLevel":1},"nodes":[{"type":"text","id":"9sK4-1729773453076","leaves":[{"text":"布局预留电源走线通道，理清电源走向","marks":[]}]}],"state":{"index":7}},{"type":"block","id":"A9NP-1729773531961","name":"list-item","data":{"listId":"j1SI-1736669385883","listType":"ordered","listLevel":1},"nodes":[{"type":"text","id":"ao4U-1729773531960","leaves":[{"text":"布局时方便布局，可隐藏所有飞线，“右键”-“隐藏连接”-“全部”","marks":[]}]}],"state":{"index":8}},{"type":"block","id":"2wJP-1736672329220","name":"list-item","data":{"listId":"j1SI-1736669385883","listType":"ordered","listLevel":1},"nodes":[{"type":"text","id":"bVOa-1736672329218","leaves":[{"text":"布局时，位号影响视觉，“右键”-“查找相似对象”-“object spefitic”-“Designator”改成same,再将“text height”与“stroke width”改到10mil与2mil，在选中文本状态下，全选“AP”定位器文本(居中)","marks":[]}]}],"state":{"index":9}},{"type":"block","id":"nrsF-1736673069573","name":"list-item","data":{"listId":"j1SI-1736669385883","listType":"ordered","listLevel":1},"nodes":[{"type":"text","id":"mslW-1736673069572","leaves":[{"text":"布局摆放电容时，遵循先大电容，后小电容的摆法","marks":[]}]}],"state":{"index":10}},{"type":"block","id":"qGsO-1736676479311","name":"list-item","data":{"listId":"j1SI-1736669385883","listType":"ordered","listLevel":1},"nodes":[{"type":"text","id":"yCtv-1736676479309","leaves":[{"text":"预布局完成后，根据走线情况再做调整","marks":[]}]}],"state":{"index":11}},{"type":"block","id":"3ebK-1729773496270","name":"paragraph","data":{"version":1},"nodes":[{"type":"text","id":"pQ66-1729773496268","leaves":[{"text":"","marks":[]}]}],"state":{}},{"type":"block","id":"W9xt-1729773080496","name":"heading","data":{"level":"h2"},"nodes":[{"type":"text","id":"I5xt-1729773080495","leaves":[{"text":"5.2布线","marks":[]}]}],"state":{}},{"type":"block","id":"lgfK-1736757803200","name":"list-item","data":{"listId":"JjYZ-1736757817509","listType":"unordered","listLevel":1},"nodes":[{"type":"text","id":"o8IE-1736757803201","leaves":[{"text":"输入打孔应在滤波电容之前，输出打孔应在滤波电容之后","marks":[]}]}],"state":{"index":1}},{"type":"block","id":"7r9R-1736757870422","name":"list-item","data":{"listId":"JjYZ-1736757817509","listType":"unordered","listLevel":1},"nodes":[{"type":"text","id":"F3aH-1736757870414","leaves":[{"text":"输入输出电路尽量少打孔，打孔会延长电路的流动路径","marks":[]}]}],"state":{"index":2}},{"type":"block","id":"Zs4j-1736758048753","name":"list-item","data":{"listId":"JjYZ-1736757817509","listType":"unordered","listLevel":1},"nodes":[{"type":"text","id":"mTFB-1736758048751","leaves":[{"text":"全连接散热快，不利于人工手动焊接(锡膏上去就凝固)；但是全连接载流能力更强，回流焊一般采用全连接","marks":[]}]}],"state":{"index":3}},{"type":"block","id":"hLj1-1736760049284","name":"list-item","data":{"listId":"JjYZ-1736757817509","listType":"unordered","listLevel":1},"nodes":[{"type":"text","id":"nmlZ-1736760049282","leaves":[{"text":"采用十字连接时，可以使用\"放置\"-“填充”进行面积扩充","marks":[]}]}],"state":{"index":4}},{"type":"block","id":"f6To-1736758254107","name":"list-item","data":{"listId":"JjYZ-1736757817509","listType":"unordered","listLevel":1},"nodes":[{"type":"text","id":"BoZy-1736758254098","leaves":[{"text":"反馈路径需要远离干扰源与大电流平面","marks":[]}]}],"state":{"index":5}},{"type":"block","id":"60m6-1736758585202","name":"list-item","data":{"listId":"JjYZ-1736757817509","listType":"unordered","listLevel":1},"nodes":[{"type":"text","id":"Lbma-1736758585200","leaves":[{"text":"信号线尽量短而粗(10mil-0.5A)，提高信号质量","marks":[]}]}],"state":{"index":6}},{"type":"block","id":"N8xf-1736758766398","name":"list-item","data":{"listId":"JjYZ-1736757817509","listType":"unordered","listLevel":1},"nodes":[{"type":"text","id":"2Kp7-1736758766396","leaves":[{"text":"开关电源中间的散热焊盘一般需要打散热过孔，并且做开窗处理(不覆盖防焊油墨)，散热过孔中间一般不走信号线","marks":[]}]}],"state":{"index":7}},{"type":"block","id":"mMdh-1736758943700","name":"list-item","data":{"listId":"JjYZ-1736757817509","listType":"unordered","listLevel":1},"nodes":[{"type":"text","id":"aV8Z-1736758943698","leaves":[{"text":"开关电源模块的电感下，需要尽量避免走线，如果走线，信号线必须要做包地处理。电感下的铜皮需要挖空至丝印处","marks":[]}]}],"state":{"index":8}},{"type":"block","id":"MMsB-1736862722954","name":"list-item","data":{"listId":"JjYZ-1736757817509","listType":"unordered","listLevel":1},"nodes":[{"type":"text","id":"IKTI-1736862722952","leaves":[{"text":"芯片pin脚铺铜时，铺铜宽度不要超过pin脚焊盘宽度","marks":[]}]}],"state":{}}]" style="color: rgb(0, 0, 0); font-size: medium;">总则快捷键：
F2:拉线
F3:打过孔
2：线选
3：框选
4：挖铜
F6

CB器件按照矩形框进行排列
num2,4,6,8:对齐按键
num5:定位器件文本

如何设置快捷键：找到需要设置快捷键的功能，crtl+左键-“可选的”，进行快捷键设置
关联PCB与原理图，快捷键“T”，选中"交叉选择模式"
在pcb中，快捷键“TC”,可在原理图中定位到元件
快捷键“DC”,打开对象类浏览器，可为网络添加类型
相似模块快速布局布线->创建room，

①全选要拷贝的器件,“D”-"M"-"从选择的器件产生矩形的room（T）"，源和目标都要创建room,也就是两个room
②通道号不一致的情况下，需要将目标的通道号与源的通道号一致。全选源room,右下角“panels”-"pcblist",选择“edit”,'selet objects',include-仅显示-compo***。"Designator"进行排序，“chanel offset”全选，crtl+c复制；
*全选目标room."Designator"进行排序，“chanel offset”全选，crtl+v粘贴；
*通过chanel-offst匹配通道号，“D”-"M"-"拷贝room格式（C）"
tips：如果布线时room拷贝不行的话，筛选tracks,vias，regions，polygon 进行拷贝粘贴，然后再进行网络修改，重新灌铜等操作

过孔孔径设置公式：2*H±2mil,H孔洞径一般设置为12mil,孔盘=2*12-2=22mil，需要在"customize"-“PCB editor”中设置，一般需要设置“tented”，进行盖油处理
忽略器件内部规则，"DR"-clearance-"忽略同一封装内的焊盘间距"

5.1布局

如果数据手册上有，直接按照数据手册进行绘制PCB

拿到PCB元件先导入，阵列排布，shootkey:TOL
绘画板框时，机械层PL画线；EOS设置原点；DSD设置板子形状，需要先选中板框
4个片脚固定孔设计，一般按照片脚中心x,y各偏移5mm
层叠管理器（DK），进行层叠管理
布局之前先进行预布局，按功进行模块化分析
模块化布局遵循以下原则：

①根据功能，进行先大后小的原则，先放置大的功能模块，再放置小的功能模块
②根据信号流向原则，根据信号的输入输出端，初步确定各个元器件的摆放位置，信号走向尽量按照“一字型”和“L字型”
*就近原则，主体与电阻容感等一个整体的部分相互靠近

布局预留电源走线通道，理清电源走向
布局时方便布局，可隐藏所有飞线，“右键”-“隐藏连接”-“全部”
布局时，位号影响视觉，“右键”-“查找相似对象”-“object spefitic”-“Designator”改成same,再将“text height”与“stroke width”改到10mil与2mil，在选中文本状态下，全选“AP”定位器文本(居中)
布局摆放电容时，遵循先大电容，后小电容的摆法
预布局完成后，根据走线情况再做调整

5.2布线