【经典】开关电源PCB-layout与电容电感设计

<strong>Part I PCB布局指南十个简单规则</strong>

<strong>电容模型</strong>

<center><img src="http://mouser.eetrend.com/files/2018-04/wen_zhang_/100011050-38908-d1.j…; alt=“” width="600"></center>

<strong>电容参数</strong>

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<strong>电容并联高频特性</strong>

<center><img src="http://mouser.eetrend.com/files/2018-04/wen_zhang_/100011050-38910-d3.j…; alt=“” width="600"></center>

<strong>电感模型</strong>

<center><img src="http://mouser.eetrend.com/files/2018-04/wen_zhang_/100011050-38911-d4.p…; alt=“” width="600"></center>

<strong>电感特性</strong>

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<center><img src="http://mouser.eetrend.com/files/2018-04/wen_zhang_/100011050-38913-d6.j…; alt=“” width="600"></center>

<strong>镜象面概念</strong>

<center><img src="http://mouser.eetrend.com/files/2018-04/wen_zhang_/100011050-38914-d7.j…; alt=“” width="600"></center>

<strong>高频交流电流环路</strong>

<center><img src="http://mouser.eetrend.com/files/2018-04/wen_zhang_/100011050-38915-d8.j…; alt=“” width="600"></center>

<strong>过孔 (VIA) 的例子</strong>

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<strong>PCB板层分割</strong>

<center><img src="http://mouser.eetrend.com/files/2018-04/wen_zhang_/100011050-38917-d10…; alt=“” width="600"></center>

<strong>降压式(BUCK)电源：功率部分电流和电压波形</strong>

<center><img src="http://mouser.eetrend.com/files/2018-04/wen_zhang_/100011050-38918-d11…; alt=“” width="600"></center>

<strong>降压式电源排版差的例子</strong>

<center><img src="http://mouser.eetrend.com/files/2018-04/wen_zhang_/100011050-38920-d12…; alt=“” width="600"></center>

<strong>电路等效图</strong>

<center><img src="http://mouser.eetrend.com/files/2018-04/wen_zhang_/100011050-38921-d13…; alt=“” width="600"></center>

<strong>PCB Trace - Via 电感估算</strong>

<center><img src="http://mouser.eetrend.com/files/2018-04/wen_zhang_/100011050-38922-d14…; alt=“” width="600"></center>
<center><img src="http://mouser.eetrend.com/files/2018-04/wen_zhang_/100011050-38923-d15…; alt=“” width="600"></center>

<strong>焊盘(PAD)和旁路电容的放置</strong>

<center><img src="http://mouser.eetrend.com/files/2018-04/wen_zhang_/100011050-38924-d16…; alt=“” width="600"></center>

<strong>降压式电源排版的例子</strong>

<center><img src="http://mouser.eetrend.com/files/2018-04/wen_zhang_/100011050-38925-d17…; alt=“” width="600"></center>

<center><img src="http://mouser.eetrend.com/files/2018-04/wen_zhang_/100011050-38926-d18…; alt=“” width="600"></center>

<strong>Part II　输出电容设计纹波电压分析</strong>

<strong>高频输出瓷片电容特性</strong>

<center><img src="http://mouser.eetrend.com/files/2018-04/wen_zhang_/100011050-38927-d19…; alt=“” width="800"></center>
<center><img src="http://mouser.eetrend.com/files/2018-04/wen_zhang_/100011050-38928-d20…; alt=“” width="800"></center>

<strong>输出滤波电容电路分析</strong>

<center><img src="http://mouser.eetrend.com/files/2018-04/wen_zhang_/100011050-38929-d21…; alt=“” width="600"></center>
<center><img src="http://mouser.eetrend.com/files/2018-04/wen_zhang_/100011050-38930-d22…; alt=“” width="600"></center>
<center><img src="http://mouser.eetrend.com/files/2018-04/wen_zhang_/100011050-38931-d23…; alt=“” width="600"></center>
<center><img src="http://mouser.eetrend.com/files/2018-04/wen_zhang_/100011050-38932-d24…; alt=“” width="600"></center>
<center><img src="http://mouser.eetrend.com/files/2018-04/wen_zhang_/100011050-38933-d25…; alt=“” width="600"></center>
<center><img src="http://mouser.eetrend.com/files/2018-04/wen_zhang_/100011050-38934-d26…; alt=“” width="600"></center>

<strong>Part III 电感电容对VDSL的影响</strong>

<strong>xDSL 传播速度图</strong>

<center><img src="http://mouser.eetrend.com/files/2018-04/wen_zhang_/100011050-38935-d27…; alt=“” width="600"></center>

<strong>电感寄生电容影响</strong>

<center><img src="http://mouser.eetrend.com/files/2018-04/wen_zhang_/100011050-38936-d28…; alt=“” width="600"></center>
<center><img src="http://mouser.eetrend.com/files/2018-04/wen_zhang_/100011050-38937-d29…; alt=“” width="600"></center>
<center><img src="http://mouser.eetrend.com/files/2018-04/wen_zhang_/100011050-38938-d30…; alt=“” width="600"></center>
<center><img src="http://mouser.eetrend.com/files/2018-04/wen_zhang_/100011050-38939-d31…; alt=“” width="600"></center>

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