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MS_19060803
Level 5
Level 5
Distributor - TED (Japan)
25 likes received 25 solutions authored 10 likes given

いつもお世話になっております。

・IGB50N65S5のTc測定箇所は裏面パッド中央との認識で問題ございませんでしょうか?

MS_19060803_0-1685496072593.png

・裏面パッドの場合、Tc測定が困難なのでデバイス表面中央のTc値はございませんでしょうか?

 または、表面Tcを算出する方法があればご教示願います。

・Rth(j-a)のCu 6cm2は部品面のみと考えていますが、この認識で正しいでしょうか?

MS_19060803_1-1685496393744.png

以上、よろしくお願いいたします。

 

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1 Solution

Hi MS:

Thanks for your comments.

Right, this is on the top layer.

You can set pad on bottom layer and via for better cooling. This is link for reference:

https://www.infineon.com/cms/jp/product/evaluation-boards/eval-m3-ts6-665pn/

View solution in original post

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5 Replies
喜马拉雅之雪
Employee

Hi  MS:

For steady state Tj , you can use Tc with it by infrared thermometry or thermocouple in calm room.

Usually, Tj - Tc is lower than 7℃,@ if Tc is lower than 110℃ and Ta is about 20 ℃。

Thanks

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MS_19060803
Level 5
Level 5
Distributor - TED (Japan)
25 likes received 25 solutions authored 10 likes given

Hi,

Thank you for your support.

・Is it OK that Tc measurement point of the IGB50N65S5 is the center of the back pad?

 

MS_19060803_0-1685512864382.png

・I think that Cu 6cm2 of Rth(j-a) is only on the part side.

 Is it correct?

MS_19060803_1-1685512919605.png

Best regards,
MS

 

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Great! This is best test point.

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MS_19060803
Level 5
Level 5
Distributor - TED (Japan)
25 likes received 25 solutions authored 10 likes given

Hi,

Thank you for your prompt response.
Could you give me some advice too?

・I think that Cu 6cm2 of Rth(j-a) is only on the part side.

 Is it correct?

Best regards,
MS

0 Likes

Hi MS:

Thanks for your comments.

Right, this is on the top layer.

You can set pad on bottom layer and via for better cooling. This is link for reference:

https://www.infineon.com/cms/jp/product/evaluation-boards/eval-m3-ts6-665pn/

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