Questions tagged [heatsink]

A heatsink dissipates heat into the surrounding air and thus provides cooling.

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56 views

Fixing hot plate and the heat sink, which thermoelectric module would produce more power?

Thermoelectric coolers (TECs) are typically used to generate temperature difference. Thermoelectric generators (TEGs), however, are used for power generation. While TECs are much cheaper than TEGs, ...
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1answer
75 views

Modify PCB Mains Voltage input to 12VDC

One of my amplifiers has died so I need to find out if I can hookup a spare I have lying around as per "Section B" of the below block diagram. I have done the same modification before on ...
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2answers
133 views

Innovation in heat-sink design? [closed]

20 years ago, if you opened up a consumer-level desktop computer its heatsink would be a "metal grill" type device place on top of the CPU. 20 years later, if you open up a consumer-level ...
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1answer
68 views

Choosing a non specific heatsink

I am designing a PCB board, and it has lots of components on it. It has like 8 MOSFETs, diodes, fuses, current sensors, a STM32 and other components, and with an exception to a few (like mosfets and ...
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483 views

How should I design a heat sink for an SMD power mosfet?

I really like the specs for the Infineon OptiMOSPower-Transistor IPT007N06N, but how would I keep this beast cool? Usually I use regular aluminium heat sinks (with water cooling or a fan) for MOSFETs ...
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3answers
771 views

Effect of length on a thermocouple's accuracy

I'm a mechanical engineer working on acquiring some temperature data using thermocouples. Q. I wanted to know the effect of wire length on a thermocouple's accuracy. I don't have much of electrical ...
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1answer
112 views

Does anybody know a better way to cool a heatsink that is not a fan? [closed]

I am designing a portable distiller powered by the sun. I will be heating the water with a heating coil and then when the water evaporates I will be collecting the stem in a metal tube(not sure what ...
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2answers
92 views

heat sink solution for light source around 1000°C

I'm going to use a infrared light source IR12k which can reach 975°C for my design. However, I'm not sure whether I can solder this light source with cable whose other end is soldered with power board....
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1answer
64 views

Heatsink to dissipate 170W

I am planning to build a light from 12 LEDs (CREE XML RGBW). These are 4 diodes on one star - a red, a blue, a green, and a white - with a total forward voltage of 13.9V at 350mA. Is there any kind ...
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1answer
42 views

Is it okay to leave regulators heating at higher end of range of operating range?

IC operating range -20 to 80 degrees Celsius Regulator IC application spec 12V in, 5V 1.5A output Is it okay to keep IC running at 70-75 degree Celsius (with heat sink) all the time, circuit will be ...
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3answers
63 views

Calculating PCB temperature increase

so I have created a PCB with a lot of components on it, its a rather large PCB, roughly 18cm x 19 cm. A lot of the components' datasheets (things like Resistors, Switches, capacitors, relays, CAN ...
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27 views

Heat sink for the L298 stepper driver IC

I am coming today to seek help from you for sizing a heat sink for the L298N IC. This Ic will be used to drive a 2A/phase stepper driver, supplied with a 12Vdc signal, and 5Vdc for the logical part. ...
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1answer
49 views

how to use TO-254 Power MOSFET and DIODE's full current capacity?

I want to know how I can utilise full current capacity of a TO-254 power MOSFET or diode while using it on a PCB. Presently I'm not able to utilise it completely, due to the limitation of the number ...
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1answer
37 views

Heatsink selection and datasheet specifications for Thermoelectric Generator

I have bought this TEG. I am planning to use it as a generator, for energy harvesting applications. I am having trouble though understanding both the diagrams and the meaning of the TEG's ...
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3answers
125 views

Does cooling the NAND chips on an SSD negatively affect its reliability?

The problem of heat dissipation in high-performance, small form-factor SSDs is well-known, for example, the paper Transient Thermal Analysis for M.2 SSD Thermal Throttling published in 2018 17th IEEE ...
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2answers
94 views

How do I distribute heat from a heating pad to my electronics?

I'm building an outdoor sensor system (a bunch of sensors and a Raspberry Pi inside a plastic enclosure). A few weeks ago, one of my prototypes got too cold (ambient temperature went below 0deg ...
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27 views

Practical Issues with Surface Mount Heatsinks?

I'm considering using surface mount heat sinks for D2PAK devices on a PCB. These heat sinks are bent sheet metal frames with tin/lead plating in tape/reel packaging which are suitable for soldering ...
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1answer
53 views

Heatsink land pattern interpretation (DPAK heatsink)

I'm looking at using a D Series heatsink from Ohmite. The land patterns on the last page of the product PDF are very lightly labeled and I'm not entirely sure how to interpret them https://www.ohmite....
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58 views

Thermal Resistance, PCB Operating Temperature and PCB Self Heating

I want to understand a few terms. My Questions : What does Maximum PCB operating Temperature for a PCB in general depend upon? Maximum PCB Operating temperature depends on Tg (Glass Transition ...
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2answers
62 views

How fast will a resistor heat up under high power?

I am building a circuit for some induction coils on a coilgun, and it will draw about 1.75A from a 12V power source (I know it probably won't be very powerful, but it is difficult to find resistors ...
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0answers
36 views

Heatsink Crossing Primary and Secondary Sides in Switched-Mode Power Supply

I've taken apart a non-oem laptop power supply. There is clearance on the board between primary and secondary. However, they've placed a single heatsink across the board for the primary and secondary ...
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57 views

How close can I put my LEDs together in a given Heatsink?

I'm making a led panel and I'm facing the following issue: I want to know how close I can put the LEDs together in a given Active Heatsink. So, I've the LEDs, the Heatsink and the thermal paste ...
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1answer
44 views

Does LED thermal need to be isolated from GND in this case?

I'm designing a small LED device which is powered by a battery. The case of the device is acting as the GND line between the battery and the LED driver, but it is also acting as the heatsink for the ...
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2answers
178 views

How to mount TO-92 package on a heatsink?

I want to measure heatsink temperature using LM35 TO-92 package. heatsink is a flat surface of aluminum. What is the proper way of mounting a TO-92 temperature sensor on a heatsink so that can ...
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3answers
48 views

Thermal Resistance of PSU's heat sinks

I have a non functional PC power supply unit, and I would like to keep its heat sinks, but they have no model or part number in them. Is there a way to estimate, calculate or measure their thermal ...
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3answers
302 views

Using a small heatsink with a high power LED (50W)

Description I want to use a 50 Watt LED like this one (42mm*40mm) The space to integrate this component is limited. I have only 55mm*55mm*30mm in total. So the LED + Heatsink size must not be higher ...
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1answer
93 views

What temperature should I expect by lighting 3W-LEDs?

I have a PCB with 10 LEDs (reference : SPHWH2L3D30ED4TPK3) which will each dissipate 3 W (forward voltage of 3 V and 1 A passing through). The PCB is a circle with a diameter of 20 cm and LEDs are ...
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2answers
79 views

Linear Voltage regulator becomes very Hot when connected to Nichrome wire heater

I'm trying to build a heating element using nichrome wire 24 gauge. I'm using a 12v linear voltage regulator (L7812CV) as a power adopter which is connected to a rectifier bridge providing 19v. When ...
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2answers
63 views

Heatsink design, factors to consider?

I'm trying to design an small but effective heatsink (DIY type), the design that I came up with so far is a 4x4x9cm aluminum square tube with a 12V fan under it blowing up: poor designing skill... ...
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1answer
78 views

What does these heatsinks do?

I think sharing the video will be the easiest way of describing the situation. The transistors are electrically isolated from the heatsinks, I have checked with multimeter. Few days ago, I have ...
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4answers
2k views

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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4answers
383 views

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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1answer
65 views

Should I apply soldermask over SMT thermal pads?

On page 8 and 9 of the following datasheet, there's a description of thermal pads for this MOSFET: https://www.vishay.com/docs/63302/si2342ds.pdf What I am wondering is: I will design the footprint ...
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2answers
155 views

Can I use those TO-220 heatsinks with a TO-126 package?

The TO-126 component is this : https://pdf.direnc.net/upload/bd679-datasheet.pdf Dimensions for heatsink : 19.7 mm - 14.8mm - 9.7mm I wonder can I mount this TO-220 heatsinks to BD679 or not. The ...
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2answers
85 views

3.3kV isolated heatsink for TO247 packages

I want to use some TO247 devices with an enclosure. In fact, I have to and there is no choice. The enclosure has to withstand a dielectric strength test of 3.3kV for 10sec plus 6.6kV for 20ms. All ...
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1answer
77 views

Will 5W power on TIP41C/TIP42C require a heat sink?

I do guess it will require but I have never used a heat sink before, so I am not sure.
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1answer
103 views

Trying to get 2 Amps out of 3 Amp Regulator (MIC29302WU)

I am trying to get 5V,2A out of the MIC29302WU (TO-263 package) with an input voltage of 12V. The voltage drops to around 2.2V when trying to supply even 1.3A. Blowing canned air over the regulator ...
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1answer
64 views

Arduino RGBW 24v LED strip driver

This might not even be the right place for me to ask, but I hope somebody can help; I have an arduino mega with 4 PWM outputs (5v, fitted with 220 ohm resistor) that I would like to use to control ...
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0answers
32 views

Bottom solder on the UPS PCB [duplicate]

Today i was looking at PCB of an old ups system. I noticed that there is a bottom solder pattern on the back side of the PCB, right under the IGBTs I believe that soldering the high power line on the ...
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30 views

Thermal resistance of Thermal Interface Material

Can anyone please give information how to calculate the thermal resistance of SIL PAD "TSP A2000" from make Berguist. from The data sheet its specified thinness is 0.254mm, Thermal conductivity (W/m-...
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1answer
189 views

LF33CV voltage regulator overheating

I'm trying to turn on a laser (3.3v - 4.5v, 100mw) using a 9v battery and LF33CV as voltage regulator(TO220 package, 3.3v output). After 20 seconds the voltage regulator is getting so much hot. I was ...
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2answers
74 views

DIY Power supply kit suggestion (Fan & pull-up resistor, cap)

I bought this 0-30v power supply DIY kit... There is three suggestion I need... 1. I want to use a 12V fan, so I'm changing the 7824 to 7812. So, I'm thinking to change the pull-up resistor (2.2K) to ...
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3answers
275 views

Heatsink on top of SMD plastic IC or bottom of PCB?

I often do designing power modules and always wonder if there is some kind of rule how to properly cool SMD devices. I always look at final products from other companies and some are placing heatsink ...
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3answers
234 views

Why does a Peltier cooler heat up when cooled by ice?

On this post, the question presents a problem of a Peltier cooler heating up after operating for a while. The explanation was that the Peltier cooler is only able to maintain a fixed temperature ...
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3answers
139 views

Can I increase the power rating of a film resistor if I increase the cooling?

I am trying to apply 1 kW of heat to an area of 10x10 mm and I am considering using a panel mounted film resistor. One that meets my power requirements doesn't exist so I am wondering if I can go ...
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4answers
668 views

How do thermal tapes transfer heat despite their low thermal conductivity?

I found myself needing to attach small heatsinks to Mosfets and CC power regulators. Also some high-power diodes. Today I have learnt that thermal compounds, even best in the market, are dozens of ...
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1answer
195 views

500V generation, MOSFET Heating Problem

Referring to my previous post. I have successfully generated 500V. The problem I am facing an issue. MOSFET I am using for switching is FQB34N20LTM. The MOSFET is burning badly. The snap of drain ...
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1answer
49 views

Application based Heat sink design for Power diode

Instead of having a heatsink directly connected to the diode, I want to have a 2 mm layer of cold rolled steel in between case and heat sink(aluminium){for waterproofing as needed in the application}. ...
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0answers
72 views

BQ2057WSN Circuit Heating issue

We are using BQ2057WSN charging IC to charge a 7.4V, 6600mAh Li-Ion Battery by providing 12VDC,2A power supply. According to my calculation the charging current is set at 625mA. But while charging, ...
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3answers
2k views

Heatsink on underside of PCB

I have prototyped some DC-DC converter modules, and they work well. However due to size, I don't have a huge amount of copper pour for them to dissipate their heat. I have used 2oz copper but the ...

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