promotion image of download ymail app
Anonymous asked in Science & MathematicsEngineering · 2 months ago

Electrical Engineering Help?

Attachment image

1 Answer

  • 2 months ago

    Per the fairchild datasheet I downloaded, the thermal resistance junction to ambient is 200°C/W.

    If the device is dissipating 625 mW, then the jusntion will be:

    0.625 W * 200°C/W = 125°C above ambient.

    If the ambient is 50°C, then the junction will be:

    125 + 50 = 175°C

    Absolute max safe operating temperature (junction) is -55 - 150 °C.  So no, it is not operating in a safe range. 

    • Commenter avatarLogin to reply the answers
Still have questions? Get your answers by asking now.