grizedale
Advanced Member level 3
Hello,
Do you agree with me that for a surface mount device such as DPAK FET, the lowest the RthJ-A can be when mounted on around 0.5 inch square of copper, with vias to the bottom copper, is around 40 degreesC/Watt.
It simply cannot get much lower than this, no matter how much extra PCB copper is added
is this true?
....And for a surface mounted DPAK, with no fan in the enclosure containing its PCB, theres no way you can get RthJ-A less than 20 degreeC/Watt
Is this also true?
Do you agree with me that for a surface mount device such as DPAK FET, the lowest the RthJ-A can be when mounted on around 0.5 inch square of copper, with vias to the bottom copper, is around 40 degreesC/Watt.
It simply cannot get much lower than this, no matter how much extra PCB copper is added
is this true?
....And for a surface mounted DPAK, with no fan in the enclosure containing its PCB, theres no way you can get RthJ-A less than 20 degreeC/Watt
Is this also true?