Connect with us

Heatsink

Discussion in 'General Electronics Discussion' started by dcac, Jan 12, 2017.

Scroll to continue with content
  1. dcac

    dcac

    56
    1
    Jul 10, 2013
    Hi there,

    Does anyone know about heatsinks?
    I found this equation temperature of junction is equal to ambient temperature plus power dissipation at the junction times total thermal resistance of the system. So if I add heatsink on I rise junction temperature. So how does the heatsink help to improve cooling?

    Thanks
     
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,401
    2,777
    Jan 21, 2010
    In most normal circumstances adding a heatsink reduces the junction temperature because the thermal resistance between the junction and the ambient environment is reduced.

    Have a look in the resource section. We have a partially completed resource on heatsinks that might help you.
     
  3. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,401
    2,777
    Jan 21, 2010
  4. dcac

    dcac

    56
    1
    Jul 10, 2013
    thanks, it looks like a very well written article.
     
  5. OBW0549

    OBW0549

    159
    118
    Jul 5, 2016
    Heatsinks reduce the junction-to-ambient thermal resistance, not increase it.
     
  6. Herschel Peeler

    Herschel Peeler

    401
    65
    Feb 21, 2016
    How much heat are you trying to dissipate? Fan or no fan?
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-