This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

  • Resolved

CSD95375Q4M: Junction-to-ambient Thermal Resistance Theta-ja

Intellectual 1080 points

Replies: 1

Views: 63

Part Number: CSD95375Q4M

Hi Team,

may i have your help to know CSD95375Q4M Junction-to-ambient Thermal Resistance Theta-ja?

  • Henry,

    Thanks for posting. 

    RthJA of a device is a function of both packageand thermal environment which is why whenever you see it specified on a datasheet, it is specified for a given board thickness and size. 

    A 5x6 QFN will have a RthJA of ~40deg C / W typically on a 1x1" 2oz Cu board. A 3x3 QFN will be closer to 50deg C / W on the same board. So this 3.5 x 4.5 would be somewhere in between, around 45deg C / W on a 1x1" 2oz Cu board. 

    With thicker PCB, or other means of pulling heat out from the package, be it airflow or a heatsink, you might be able to get that down to 20deg C/W or less but again, that would depend on the design. 

    Best Regards!

    Brett Barr

    Product Marketing Engineer

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.