1、一组5V电源固定电源输出(未画出来,用SG6841跟P3NK60).为独立变压器,有一辅助电源同时提供给6841和3843.
2、一组电源为输出12V到36V之间.可以调节..用单片机给一个1.2V到3.6V的控制电压到LM358,然后经光耦PC123去控制3843和20N60的输出.详细请看图..
不知道是元件买的太烂还是电路图有问题.3843一跟20N60接通,20N60就击穿,导致3843也报销了!限流取样电阻也烧了.限流电阻是0.15欧姆的.
大家帮忙看看这是什么问题?
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