MBR30040CT進(jìn)口二極管
【簡(jiǎn)單介紹】
【詳細(xì)說明】
MBR30040CT我們只能參考廠家給我們提供的結(jié)--殼熱阻(Rjc),通過測(cè)量整流橋的殼溫從而推算出其結(jié)溫,
達(dá)到檢驗(yàn)?zāi)康?。在此,我們著重討論該?jì)算殼溫測(cè)量點(diǎn)的選取及其相關(guān)的計(jì)算方法,
并提出一種在實(shí)際應(yīng)用中可行、在計(jì)算中又可靠的測(cè)量方法。
從前面對(duì)整流橋帶散熱器來實(shí)現(xiàn)其散熱過程的分析中可以看出,
整流橋主要的損耗是通過其背面的散熱器來散發(fā)的,因此在此討論整流橋殼溫如何確定時(shí),
就忽約其通過引腳的傳熱量?,F(xiàn)結(jié)合RS2501M整流橋在110VAC電源模塊上應(yīng)用的損耗(zui大為22.0W)來分析。
假設(shè)整流橋殼體外表面上的溫度為結(jié)溫(即150.0C),表面換熱系數(shù)為50.0W/m2C(在一般情況下
,強(qiáng)迫風(fēng)冷的對(duì)流換熱系數(shù)為20~40W/m2C)。那么在環(huán)境溫度為55.0C時(shí),通過整流橋正表面散發(fā)到環(huán)境中的熱量為:
忽約整流橋引腳的傳熱量,則通過整流橋背面的傳熱量為:
由于在整流橋殼體表面上的兩個(gè)傳熱途徑上(殼體正面、殼體背面)的熱阻分別為:
根據(jù)熱阻的定義式有: 所以:
MUR30020CT MUR30010CT
MUR20060CT MUR20040CT
MUR20020CT MUR20010CT
MUR10060CT MUR10040CT
MUR10020CT MURT60060A
MURT60040A MURT60020A
MURF30060CT MURT50060A
MURT50040A MURT50020A
MURF30040CT MURF30020CT
MURF30010CT MURF20010CT
MURF20020CT MURF20040CT
MURF20060CT MURF10020CT
MURF10040CT MURF10060CT
MUR10020CT MUR10040CT
MUR10060CT MUR7040CT
MUR7060CT UFT14040
UFT14060 UFT10040
UFT10060 MBR200100R
MBR20080R MBR20060R
MBR20045R MBR20040R
MBR20035R MBR120100R
MBR12080R MBR12060
MBR12045R MBR12040R
MBR12035R FST20045
FST20040 FST160100
FST16080 MBR600100CT
MBR60080CT MBR60060CT
MBR60040CT MBR60020CT
MBR500100CT MBR50080CT
MBR50060CT MBR50040CT
MBR50020CT MBR400100CT
MBR40080CT MBR40060CT
MBR40045CT MBR40040CT
MBR300100CT MBR30080CT
MBR30060CT MBR30045CT
MBR30040CT
20TT100
21DQ04
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21TT100
220CNQ030PBF
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