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铭牌标识,额定功率230W,单电压输入,无电压切换开关.
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8CM含油轴承风扇,寿命一般,使用初期声音比较轻.
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打开盖子是一块被动式PFC电感,很厚重,EE4321
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取下PFC电感和支架后的样子
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电路板底下青壳纸,绝缘用,绕工频变压器的时候也有用到,高温特性比塑料片要好.
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输入电源插座,做了一级EMI滤波电路在上面.
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TL494+LM339主电路拓扑结构,RCC的辅助电源电路.
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输入第二级的EMI滤波电路,PFC模块接口,以及310V整流滤波,4颗IN5408组成了1000V 3A的全桥整流.
左边两颗蓝色的是Y电容,一级EMI滤波的小电路板上面也有两颗,电脑没有接地的情况下有轻微触电的感觉(麻麻的)就是因为这四个电容对地泻放电流造成的,可以把这四个电容去掉就OK了.(不过国际上各个安全认证机构对这个电容是有要求的,比如3C认证、原来的长城认证、欧共体认证、RL认证等等.)
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HEC的330UF 200V 电解电容,两个串联,工作在310V电压下,足够了.
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高压侧3个三极管型号依次是2SC3866(800V 3A NPN TO-220F)、J13009、J13009(400V 12A NPN TO-220)PDF文件如下
2SC3866.pdf
J13009.pdf
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三个变压器分别为EEL19(5V辅助电源)EEL16(两个J13009的驱动变压器),ERL35(主变压器)
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EEL19(5V辅助电源)
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EEL16(两个J13009的驱动变压器),TL494输出信号经三极管放大后推动EEL16的初级,次级分别推动两个J13009
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ERL35,变压器外面还包了一圈18MM宽的铜铂.
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图片正中间这个包这热缩膜的电感就是磁放大电感,非晶磁环,如下
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本来是用1股1MM的线绕6匝的,我改成2股0.8的了,做点小动作.
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非晶磁环,打开盖子就看到了.里面用胶水粘牢了,取不出来.
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低压侧的散热片上有三个整流管.左边大的那个是D83-004,也有几个批次是用S30SC4M的,30A 40V的肖特基二极管,5V输出整流用.
中间的是STPR1620CT,200V 16A的快恢复二极管,12V整流用.
右边的是MBR2045,20A 45V的肖特基二极管,3.3V整流用.
S30SC4M.pdf
STPR1620CT.pdf
MBR2045.pdf
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滤波输出,
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最大的电感,分四组线圈,黄白色磁环外径27MM 内径15MM,厚10MM
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3.3V的大电感,黄白色磁环外径24MM 内径14MM,厚8MM
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电容电感大集合
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