Search results

  1. D

    0-30V Stabilized Power Supply

    I usually use this way to calculate the heatsink, it is wrong that way: (130°C-30°C)/4.5W - (10C/W+0.3C/W) = 11,9°C/W
  2. D

    0-30V Stabilized Power Supply

    So, what heatsink do you suggest, how much should be a thermal resistance, i have one heatsink with 5°C/W at home, which I intend to fix on housing of BD139. I think that it is enought for condition in this stabilized power supply with max 5A current or not??
  3. D

    0-30V Stabilized Power Supply

    I calculated the heatsink wit aprox. 0.5°C/W thermal resistance for one transistor, how much must be that for three 2n3055. What fun you suggest?? what dimension and voltage?
  4. D

    0-30V Stabilized Power Supply

    So, this is my first post on this forum, first hi everybody!! ;D I will make this project in near future therfore i am interested how to calculate total dissipation on transistor 2n3055. I will use the 5A (REV3) version of this project, so i'll use three transistor and transformer 30VAC 210VA...
View older results
Top