Here is the problem:
Lets say we have a power mos fet (TO220) That runs saturated (hard on) most of the time with a 3 amp load so the DC temperature rise is only about 6C. But say evey 45 minutes it runs in linear mode for 2 seconds with a power disipation of 70 watts. How do you calculate the temperature of the junction at the end of that 2 seconds.
1- without a heatsink
2- with a heatsink if one is needed.
Lets say we have a power mos fet (TO220) That runs saturated (hard on) most of the time with a 3 amp load so the DC temperature rise is only about 6C. But say evey 45 minutes it runs in linear mode for 2 seconds with a power disipation of 70 watts. How do you calculate the temperature of the junction at the end of that 2 seconds.
1- without a heatsink
2- with a heatsink if one is needed.