proper way to heat sink an LM317T

Discussion in 'General Electronics Chat' started by huitlacoche, Apr 29, 2009.

  1. huitlacoche

    Thread Starter New Member

    Apr 29, 2009
    9
    0
    Is there a proper way to heat sink an adjustable voltage regulator?
    I used a screw and nut and a little bit of thermal paste to affix the sink but beyond that I don't know if there anything I can do better (or even if it needs anything better)

    thanks
    ~mark
     
  2. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    It sounds good.

    Do you have the right size of heatsink?
     
  3. StayatHomeElectronics

    Well-Known Member

    Sep 25, 2008
    864
    40
    If you are not having any thermal issues at this point, then you don't need to do anything else.

    If you need more heat sink capability, you can always use a larger heat sink or a fan to cool the part down.
     
  4. huitlacoche

    Thread Starter New Member

    Apr 29, 2009
    9
    0
    I'm using a to-220.
     
  5. StayatHomeElectronics

    Well-Known Member

    Sep 25, 2008
    864
    40
    That's fine. Unless you are having a problem then there is no problem. What you have already done sounds good.

    Check the temperature of the part in its final enclosure with a maximum load if you are worried.
     
  6. bertus

    Administrator

    Apr 5, 2008
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  7. wollybyte

    Member

    Apr 5, 2009
    15
    0
    just make sure the heat sink is not connected to GND or metal casing directly
    if that is the case use mica and isolation washers
     
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