IRFP460的datasheet上说25度时导通电阻为0.27欧,为什么我刚开机时(温度顶多30度),电流5A测得导通压降有5V呢?
MUR860导通压降也是高的离谱,有6V.真是搞不懂,望指教,谢谢.
下面分别为截取的mosfet和二极管的波形1146317961.tif1146318033.tif
mosfet(IRFP460)和二极管(MUR860)为什么导通压降这么大?
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mosfet波形
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二极管波形
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二极管波形
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