Thermal management design for POWER MOSFET

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User18681
Level 1
Level 1
First question asked
I want to calculate the heat transfer and no.of Thermal vias for IPT020N10N3. How can i calculate? could anyone can help?
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1 Solution
Abhilash_P
Moderator
Moderator
Moderator
50 likes received 500 replies posted 250 solutions authored
Hi,

The maximum allowable power dissipation that will raise the die temperature to the maximum allowable when the case temperature is held at 25 C is important. It is given by Pd where:
Pd = Tjmax-25/(Rthjc)

Tjmax = Maximum allowable temperature of the p-n junction in the device (normally 150C or 175C)
RthJC= Junction-to-case thermal impedance of the device.

4854.attach

The attached image shows the equivalent circuit that has high effect during switching. With the help of the attached image the heat transfer can be calculated.

Regards,
Abhilash P

View solution in original post

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1 Reply
Abhilash_P
Moderator
Moderator
Moderator
50 likes received 500 replies posted 250 solutions authored
Hi,

The maximum allowable power dissipation that will raise the die temperature to the maximum allowable when the case temperature is held at 25 C is important. It is given by Pd where:
Pd = Tjmax-25/(Rthjc)

Tjmax = Maximum allowable temperature of the p-n junction in the device (normally 150C or 175C)
RthJC= Junction-to-case thermal impedance of the device.

4854.attach

The attached image shows the equivalent circuit that has high effect during switching. With the help of the attached image the heat transfer can be calculated.

Regards,
Abhilash P
0 Likes