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300w 开关电源, 接负载, 但没有输出, 有响声, 什么原因?
winsome_wong
最新回复：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 回复
原帖：我的电源为何不能带负载?
winsome_wong：
Ifthecontrolloopisnotworkingwell,the'gi-gi'willbecreatedalso.checktheinductorortransfomeranditscontrolmetholdandcontrolloop.
2004-08-19 12:03 回复
原帖：从DC-DC的PCB板上为什么发出强烈的“丝丝”声
winsome_wong：
outputcapacitorselectionusually,theoutputcapacitorselectionwillbasedontheholduptimeatabout20-40ms.useQ=1/2*CV^2*t(Qistheoutputpower,andtheVistheallowedoperationvolatage)
2004-03-22 07:40 回复
原帖：开关电源输入输出滤波
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