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功率器件如何標(biāo)稱連續(xù)電流
Release date:2023-04-12
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Category:Technical Article
Views:463次
功率器件的標(biāo)稱連續(xù)電流通常使用上述公式來計(jì)算。然而計(jì)算所得的 Ids 僅為電流的上限。通常半導(dǎo)體器件提供商會(huì)設(shè)定一個(gè)安全裕量,標(biāo)稱的電流會(huì)小于計(jì)算出來的電流上限
舉例說明,CoolMOS IPB65R095C7 (TO263), Rdson@TJmax=0.202, RthJC=0.98, Idsmax from 計(jì)算所得電流為25.13A,這個(gè)器件實(shí)際標(biāo)稱值為24A。芯干線XG6508B8計(jì)算所得電流為22.1A,而實(shí)際標(biāo)稱值僅為15A。這是考慮到DFN表面貼器件實(shí)際散熱能力比直插封裝要差一些的原因
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