shenchen 发表于 2023-3-4 11:47

DC/DC电源常见的电路拓扑方式

#申请原创# #每日话题# #技术资源# 1、DCDC的基础知识    
    DC-DC是英语直流变直流的缩写。所以DC-DC电路是某直流电源转变为不同电压值的电路。DC-DC是开关电源技术的一个分支。这里说的DC-DC是指开关电源芯片。开关电源,指利用电容、电感的储能的特性,通过可控开关(MOSFET等)进行高频开关的动作,将输入的电能储存在电容(感)里,当开关断开时,电能再释放给负载,提供能量。其输出的功率或电压的能力与占空比(由开关导通时间与整个开关的周期的比值)有关。开关电源可以用于升压和降压。我们常用的DC-DC产品有两种。一种为电容储能DC-DC,一种为电感储能DC-DC。

2、DC/DC电源常见的电路拓扑方式有三种:Buck、Boost、Buck-Boost
1)降压DC-DC:BUCK       BUCK型DC-DC主要用于降压,其原理如下图,开关管Q1打开时,Vin通过L1给负载供电,L1中储藏电能,当Q1闭合时,当在L1内上会感应出反向的电动势,极性是左负右正,此时电感通过二极管D1给负载供电。输出的电压跟占空比D有关:Vout=Vin*D。该电路中由于频繁开关作用,所以要求二极管D1具有极高的回复速度,考虑到效率,该二极管还要具有低的正向导通电压,一般选用肖特基二极管。
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
2)升压DC-DC:BOOST
      BOOST型DC-DC主要用于升压电路,其原理如下图,当开关管Q1闭合时,二极管D1截止,电流流经电感L1和开关管Q1,此时电容Cout给负载供电,当开关管Q1断开时,L1上产生反向的电动势,极性是左负右正,此时Vin和L1上的电动势叠加通过二极管给负载供电,同时给Cout充电。输出的电压同样跟占空比D有关:Vout=Vin/(1-D)。
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
3)升降压DC-DC:BUCK-BOOST
      BUCK/BOOST型DC-DC既可用于降压,也可用于升压,其原理如下图所示,该类型电压输出:Vout=Vin*D/(1-D)
data:image/png;base64,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***xy84R7rN+vKk2aDbXm1CZ4PDw8yz1QfCRuxjhffNkof6V0+S/p5mqxohCGDX0uhClpdMKwBu06y3TeuM9FpfxJId9t+NkXGO9CrsaBwMdjA2olqaHx62tW34QKm2CQ6EjmbYuBx7jjxJ8eWq2yzvFL+cSLYrb+GkML36XNZPjkYbTTRWR6fewzJ3PFe2Jrpp+N26DQ4PHT2zJd1MaCVAbgSIejMrv0OFYUeKrxauGmd91t1rpcM/KBhL9qlzf0ExH+PgxT7BofaoM0w0ODwcyHkmabz6QJgPdHl33zaahIq/3fJMZe34fYX2RIE7vyXvQP7t7DY9L5HsY72ah4SFkfmP77hAHRVUZ4wmGu9g76qmweFB8sJj2Ur0xdLBK/MmyMUxDWiKIoMDIaRNDuTfLswoaUWyrHMF89pgfCV3NiI+jRONNR8l/2hCoZ3MB4BdM6ozDjuyNdHL+OGyafKDpI6erRz6cqf0ptj9LkOzn23hHOlVmMgNztXVYn/knaLu+WwmOSaFappdVPY8kKleti6vXk9ZtvyqIu5fKE0lz3+uzN9iGy2xr/BdyPfTpM5wjvSld6V+MFDkzWYknbVGyZsPopy1ZsSpYh1O76SYdX/V/aa9ZocHSY7/XJl3ra57LitY+IN9rCQjOABNs+ug5w2e7+7NGyjvE2/LCusmdYY38JVEF3LdSPNF7fBM2cL4F29wprB7rr41e9Ca11cS/iD35XyJ6VgbNziXFbga1OR2TSvLuJ4yZVmWdvWxWVaUe90sx2XQNttbtc1dfj7r7Poqp4h/lmVFucoKyyuVxdfW/R31QJlVX+NbHupo3yEgb0W2bfAo2j6aRzmpVRdlA+xPowdMoj32OaiRAZQA2o7wAKD2aHUA9otui1zCsneg0vY93qGMlgAqq2pZVxbrjhHKsmosSRRKlREeUHvbnPgJAc2wrhyf+hvdUIA5ui0A1F6WEQKAfSI8AAAAI4QHAI1A6wOwP4QHAI1BgAD2g/AAoFEIEMDuER4ANA4BAtgtwgMAADBCeADQSLQ+ALtDeADQWEwABuwG4QFAoxEggOIRHgAAgBHCAwAAMEJ4AAAARggPAADACI/k3gHLilqz3TzbzDJ/B3uCNuOWTGC/CA87UEbl2JZtAstsc0cFwQMwR7cFAAAwQngAAABG6LYASlDWuBhTWebL2mu7vnn/w/aTQFm5totdCsveAaxBeEDL7b/iqNtYkYwpGgE8QrcFAAAwQngAAABGCA8AAMAI4QEAABghPAAAACOEBwAAYITwAAAAjBAeAACAEcIDAAAwQngAAABGCA8AAMAI4QEAABghPAAAACOEBwAAYITwAAAAjBAeAACAEcIDAAAwQngAAABGCA8AAMAI4QEAABghPAAAACOEBwAAYITwAAAAjBAeAACAEcIDAAAwQngAAABGCA8AAMAI4QEAABipfXiILKvsXQAAtFRb66DahwcAALBfhAcAAGCE8AAAAIxsER5SXXctRVZfo3XL9IeSpFHfUtSNdJd/owAAVJB5nViUu6iriygt9D3X2SI8ODr6ypMUK1n1OaSxkrHknPQkSYeDTP6tr4P8GwUAoILM68RiDHUVjAt8v81s123RO5EjKb1c/kmNgkATeXKL/JxKFlmWQgVl7wYKMC1LtFlbR8pXWa3PsS2qE7cc89DTcWhL8eWSZpqhkljqhKEOZ6887LaYNt9cROn0dWv2U+FujcUTDSedeqMswTFQPfUvE7M6UZp2OdzXf5b1qPtheTfHfV2aRrqwPKWSJoG7psukWFsPmDzwTtVZ1kwzvFQqW67nPLn+JHCVnGTys0x+FssZBzovuD+oCMsO5Hoe3KAswTFQPU0pE5M6cdS3dB5Ix8msDkxCKXA3H7/g+HqexXIkdcJEfjZ4EEx2afu7LRxPrv1+M83oMpbsUzlPZwfJDnV834TTk+tJukkq2/oAAMBKm9aJaaSrWOqEr3Q0f83x1Q9tTYJPdb3f8Y/GfrH9WzhyTm1dBZcaqTdLPdPmGSfeYHDkM3frAZR502lg0OO9aknLinJtG+WhLBGu+N30GMgyn+OmIFX4XhYz1mLDOnF0o4lsHT9qnT/wTtUJAv0wkrTu4rtEBYQH6cD/Sk7gKRlKhz3pLnqhVJ76Ww4KuYu6On80irQTJnruP/xE/SzL9f6+wbKRtfygyjKTd0EVUJYo8hjguClGNb6X5ttadvG6qzpxE5vWm9sqJDzMuxsGLyLd9TylL8eS99XWfS8H/q38inwv/Sx77yDJG1pQLsoSVTsG/va3v+mDDz64/28bVa1MtrNFnTi60URSJ+eW91VvFnaUHp540vil0mGsZGzrOGzAvSiPLB7I9T2oIVGWKP8YeP369f3v88DQ1uAwV3aZFGltnXj4TB2NlcQPBzfcJTeSbH28MmmkmtzsYo/NFHek9kId22NdeYEmmwyUrKnpXSH1PqgxRVmirGPgxx9/1K9//eu1y719+3YPe1MtdftefviLFQ346+pEx9exJ90Fnv7vz7PX/vy1fv/fb/TR2X/NBlE6+tU//0of/e//aL6IhoGu9j8n1HsKjLnTQSKS1Dn1mEUSAJZ4/fq1Pvzww42W/eUvf6msoIr0t7/9rb799tuVf3/79q3evHlz//9ff/21vvvuu5XL//zzz/r888/19u1bZVmmn3/+WVmWbbW/b9680V/+8pf7///pp5/0/fff609/+lPu91zc31X7lqap4uFmUwT89NNPD97n33/88f79//rXvy4s6egf/zNU/9WrB3Xi4md0OMh09h8f6Z9+M/vjbz7Tv71+rc9+9y/37/IPv3utz17/Tn/3xz/qiw8+UHR5orPQXtjOdG6Jfc/z8P8fEL9M56lMqgAAAABJRU5ErkJggg==

3、影响DCDC效率的因素
      开关损耗和导通损耗,主要是功率器件,DCDC 结构主要由输入电容、功率MOS管、PWM模块、肖特基二极管、功率电感、输出电容和输出调节电阻构成。其中的功率器件为MOS管和电感,还有二极管的导通损耗,如果要提高电源的轻载效率,主要有几点需要注意的:降低导通损耗、降低DCR和ESR、减低铁损、铜损和降低工作频率,以及降低PCB走线损耗。

4、 总结
  基本电源拓扑结构中Buck降压型应用最多,但是各个基础拓扑组合使用,可以解决很多类似于正负电源供电以及双向电源应用方面的问题。总之电源基础拓扑结构虽老,但是实际应用却可以千变万化。



王栋春 发表于 2023-3-4 22:23

楼主归纳总结的非常不错,只是有图看不到。

dw772 发表于 2023-3-5 09:35

能总结一下传递函数和环路补偿吗

zzele 发表于 2023-3-6 08:48

boost电路中的cin可以去掉吗?
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