All Questions
Tagged with heatsink power-supply
27
questions
0
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answers
125
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Heat sink designing for an automotive grade motor controller
I am working on an electric vehicle development project. I am using a motor controller to drive a 3 phase induction motor. The motor controllers' input supply is 48 volts, and they sink a maximum of ...
- 31
0
votes
3
answers
468
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Long term issues with AC/DC converter in always ON application
We have designed an "always ON" electronic home automation device which goes behind the switchboard (inside the wall.) This is the first commercial product that I am designing, so bear with ...
- 109
4
votes
1
answer
460
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What is meant by the statement "Local bypass capacitors are needed to control EMC coupling with heat sink"?
During a talk, not sure what the speaker meant by the statement " We need to add local bypass caps to control EMC coupling with heat sink"
He was referring to the MOSFETs in synchronous ...
- 3,032
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votes
1
answer
56
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Possible fixes to a power supply thermals issue
The question applies to a buck converter design on my board:
Here is a 3D view of this section:
Layout of this section:
L1:
L2:
Layer 3 is power and layer 4 is again a full ground plane.
Here is ...
- 757
1
vote
2
answers
234
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What power supply do I need for this LED driver?
I'm putting together a project where I'll be driving 4 x 10W RGB LEDs (these ones) with one PicoBuck LED driver. I'll be using all three channels on the LEDs at the same time and controlling dimming ...
- 19
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votes
3
answers
188
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How to calculate heatsink for this power supply?
..to be updated
I will use a power supply inside an enclosure. But I saw some people are screwing these supplies to heatsinks where the bottom of the supply faces the heatsink.
But nothing is ...
- 1,885
0
votes
2
answers
1k
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LM338 gets very hot
I am trying make a variable voltage supply using part of this circuit:
Instead of a transformer and a rectifier, I am using a solar panel, which gives 37 V (open circuit) and about 30 V with a load. ...
- 1
0
votes
2
answers
697
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LM338 is getting hot and stop working when we try to flow current more then 1A
I try to make a 30 V, 5 A power supply using LM338 (without heatsink) voltage regulator IC.
In my case the value of R1 is 100 Ω and R2 is 2.2 kΩ. then it gives 29.6 V as output.
when we connect a 10 ...
1
vote
1
answer
88
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Regulator/heatsink heating up even though load is only 50% of regulator Imax
aI have made a small +/- 24VDC liner supply for the use of powering an audio preamp PCBA. LM317 for plus/ LM337 for the neg (both TO-220), 10uf output capacitance added. Even though this circuit doesn'...
0
votes
3
answers
114
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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 ...
- 577
0
votes
2
answers
167
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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 ...
- 7
0
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0
answers
207
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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, ...
- 105
1
vote
1
answer
531
views
Is it possible to use Ultrasonic sensor HC-SR04 in continuous power-on mode
I will be using Ultrasonic sensor HC-SR04 in water level measurement. I will be triggering the US sensor and getting back the time-pulse from it at very slow rate maybe once every minute. I want to ...
- 1,479
0
votes
3
answers
2k
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Transistor heating up problem
I have an LM317AHVT power supply with PNP pass transistor.
I noticed that the power transistor is heating up to about 64C after a few minutes. I am using an 130x80x30mm heatsink and an 92mm fan to ...
- 343
1
vote
2
answers
466
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Heat sink design
I'd like to implement some kind of heat sink to cool down the following step-down power converter: https://www.pololu.com/product/2851, but I have zero experience with heat sink techniques. The ...
- 175