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300w 開關(guān)電源, 接負(fù)載, 但沒有輸出, 有響聲, 什么原因?
winsome_wong
最新回復(fù)：2004-07-14 00:52
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winsome_wong：
canyoushowyourschematic?Itcanbeoneofthefollowingreasons:1.ThePWMdrivingcircuitisnotabletodrivethetransformerwhenonload.2.outputwasconnectedwithchipswhichwassomewhereshort.3.Feedbackcontrol,theresistancevaluemustbecorrect.
2004-08-26 10:57 回復(fù)
原帖：我的電源為何不能帶負(fù)載?
winsome_wong：
Ifthecontrolloopisnotworkingwell,the'gi-gi'willbecreatedalso.checktheinductorortransfomeranditscontrolmetholdandcontrolloop.
2004-08-19 12:03 回復(fù)
原帖：從DC-DC的PCB板上為什么發(fā)出強(qiáng)烈的“絲絲”聲
winsome_wong：
outputcapacitorselectionusually,theoutputcapacitorselectionwillbasedontheholduptimeatabout20-40ms.useQ=1/2*CV^2*t(Qistheoutputpower,andtheVistheallowedoperationvolatage)
2004-03-22 07:40 回復(fù)
原帖：開關(guān)電源輸入輸出濾波
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