Questions tagged [heatsink]
A heatsink dissipates heat into the surrounding air and thus provides cooling.
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Heat Dissipation Calculation for MOSFET
My challenge at the moment is dissipating 60A of load current through an array of MOSFETs.
Here are my specs:
No cooling fans
Heatsinks allowed, if needed
FET and/or heatsink cannot attach to the ...
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Dissipating 1W on a TO-220 without heatsink?
Can a TO-220 without a heatsink dissipate 1W in still air?
Or, a different way of asking the question is: Assuming an ambient temperature of 25C, how can I go about calculating the maximum power I ...
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Optimize heat sink design - connect cooling pad on PCB backside by vias
In one of my current projects I'm using an MC7805 in a D2PAK package to generate my logic supply of 5 V from an available 24 VDC supply. The current required by the circuit is 250 mA. ...
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A question about heating of a slowly turning off MOSFET
I have an N-Channel MOSFET IRF530 with its datasheet used in the following circuit:
When turned on it passes 2.5A current.
So I first wanted to make some calculations to check whether I would need a ...
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Peltier Unit Not Working
Recently I ordered a Peltier unit online and received it yesterday. Naturally, I was very excited to play with it. When I first turned it on, One side got hot, an another very cold. I had read that I ...
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Can you connect two LM317s either in series or parallel to help spread out heat?
I am designing an adjustable voltage regulator.
The regulator will have be able to switch between maximum Vout of 9V, 12V, 15V and 18V and will have a variable resistor that can adjust the voltage ...
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Fan and heatsink - suck or blow?
This question covered it for enclosures. However, from the point of view of the fan attached to a heatsink does it matter whether air is blown through the fins, or sucked through the fins. In other ...
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How do I determine the area of copper needed on a PCB to provide adequate heatsinking for a power SMD MOSFET?
I am planning to use the IRFR5305PBF Power MOSFET (http://www.irf.com/product-info/datasheets/data/irfr5305pbf.pdf) to switch on a load. I have determined that I need an external heatsink with Rthsa &...
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Should I ground the heatsink?
I am using an npn transistor in TO-220 package, and its collector is electrically connected to the metal part on it. I have checked it via a multimeter. I use a heatsink for that transistor, with ...
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LM317 Heat sink, how big?
Thanks to the help of a few of the other guys I have my AC to DC rectifier working, and the rest of the power supply working.
Now while testing the power supply, my 18V AC transformer gets rectified ...
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Heatsink pad connected to ground pins
Is it safe to use the exposed heatsink pad of a QFN to also connect the ground pins of the IC? (Like this question, but in my case the pad has many vias connecting it to ground plane.)
Additionally, ...
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Is it safe to connect metal body capacitors with a metal heatsink?
I have multiple metal case capacitors that I need to cool. The thermal tape I use is conductive (carbon based). Also larger heatsink on the left might touch capacitors on the left side. The question ...
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How to to Use a Nylon Shoulder Washer?
I'm somewhat curious as to how to use a nylon shoulder washer with a bolt. There is an example of this here (https://electronics.stackexchange.com/a/45579/95654), but I can't figure out how it would ...
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Does the paint colour matter on a heat sink?
Heat leaves a heat sink via conduction, convection and radiation. I was taught that black surfaces are best at radiating heat and correspondingly a lot of heat sinks are black. But they also have ...
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Copper or Aluminum Heatsink?
What would be a better heatsink to buy, copper or aluminum? What does copper do that aluminum doesn't? I know it is more expensive and is heavier, so what is the advantage of copper?
EDIT: more ...
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