Questions tagged [power-dissipation]

Anything related to power dissipation in electrical and electronic circuits and components, i.e. the process in which electrical energy is converted to heat when current flows through them.

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How the problem of dark silicon is/will be solved?

I read in this article that within a couple of years about 21% of transistors will have to be switched off some time, else the chip will cross its limit of heat dissipation. What general techniques (...
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3answers
3k views

Can a soapbox-sized device dissipate 10-15W of heat? If yes, how?

Some time ago, I built a soapbox-sized battery testing device. One of its functions was to discharge batteries at a specified current, and it handled most of the common battery sizes well, but its ...
6
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3answers
8k views

MOSFET heat calculation question

I am using the FQP30N06L MOSFET: http://www.fairchildsemi.com/ds/FQ/FQP30N06L.pdf. As far as I understand the data sheet, if I connect 5V to the gate and run 2A through drain to source then with a \$...
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2answers
986 views

Using a voltage divider on LED IC driver output

Would using a voltage divider on the outputs affect the drivers operation? The Driver is a 24 channel current sink IC that will be used for automotive interior lighting. LED will have a Vf of 3.3v @ ...
2
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2answers
2k views

Would replacing a resistor by another one of identical value but higher power rating affect the working of a circuit?

The schematic recommends using 20 Ω 1W as collector resistance. What I have at hand are two 10 Ω rated for 10W. I'm guessing the change should be acceptable ... What difference would it ...
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2answers
189 views

How many watts will the resistor in this naîve PSU dissipate?

One would be inclined to think the average current on resistor R would be exactly the same as in the load L, but I'm not so sure of that fact, due to the effect of the (big, 1000uF+) capacitors. ...
11
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1answer
12k views

How to choose correct resistor with proper wattage and ohms for 6 leds connected in a serial circuit?

Let's suppose I've six LED lights with each 3.2 Volt and 20mA and all six of them are connected in one serial circuit. I know there is better setup but for this I'm using this circuit setup. I'm ...
4
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2answers
314 views

Overheating Problem?

I have almost no electrical experience, so I apologize about the simplicity of the question in advance. I have 4 resistors a diode and a transistor in a 22mm x 14mm x 8mm enclosure. My concern is that ...
7
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1answer
19k views

Wattage calculation for resistors in series

I need the formula for calculating resistor wattage when the resistors are in series. For example, say I have 3 1/4 watt 10 ohm resistors in series. What is the potential power dissipation for the ...

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