All Questions
90
questions
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2
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Buck converter waveform
It became very hard for me to understand the concepts associated with buck converter waveform. What is the role of capacitor in its output terminal? Is it used for smoothing the voltage ripple? Why ...
- 2,137
0
votes
1
answer
97
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Should I limit inrush current of this MOSFET buck regulator?
I am building a digitally controlled constant current switching power supply. This circuit will deliver no more than 105 Watts at around 20V from an AC-DC DIN rail SMPS of 250W.
You can see and ...
3
votes
6
answers
1k
views
What is an intuitive explanation on how a buck and boost converter transfer energy?
I can understand how a buck converter can step down the voltage but only with the formulas. I am struggling to understand intuitively how the inductor stores energy and releases it in a way so that ...
- 360
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votes
0
answers
29
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Using a coupled inductor in a multi phase buck converter - how to set the inductor dot notation and converter PWM for best ripple reduction
Based on these Charles Sullivan papers, we can use a coupled inductor in a multi phase converter to reduce inductor ripple current.
https://www.princeton.edu/~minjie/files/sullivan-CICC-2021.pdf
http:/...
3
votes
1
answer
204
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Inductor magnetic field collapses during switching?
SEE EDITS BELOW
I'm running into some problems with my Buck converter design. During the switching period the inductors magnetic field seems to collapse, which generates some large voltage peaks. That'...
- 33
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votes
1
answer
172
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Audible Noise in MC34063-Based Buck/Boost Converter Circuit
I am trying to make a hotplate with an ESP32 and I use MC34063 for buck/boost converters. The hotplate itself require 12-30V to operate and the ESP32 and LEDs need 3.3V.
Here is the circuit:
When the ...
- 25.3k
2
votes
3
answers
260
views
Inductor in buck converter
I have a couple of questions regarding the switching inductor in a buck converter.
Is it normal for the switching inductor in a buck converter to heat up?
In my circuit, it reaches around 65 Celsius. ...
CommunityBot
- 1
7
votes
2
answers
748
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How do buck regulator modules with integrated inductors manage to be so small?
This 20 A buck regulator module from TI is 6.5x7.5x4 mm and has an internal 330 nH inductor.
This 6.5x6.5x3.1 mm 330 nH inductor from Coilcraft has an RMS current rating of 18.8 A and is the smallest ...
- 20k
2
votes
1
answer
56
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Buck converter inductor waveform having high ripple and slow charging and fast discharging [closed]
The following shows the voltage (green) and current waveform (yellow) across an inductor in a buck converter designed to step down 30 V to 15 V with 0.2 A output current.
The inductor values according ...
- 780
2
votes
3
answers
135
views
High voltage buck converter inductor voltage rating
We‘re designing a buck converter that should convert 600VDC down to 20V. For that purpose we use the ST VIPer26k.
We’re currently looking for an inductor (L2). The inductance is 1mH, but we‘re not ...
- 35.2k
0
votes
1
answer
87
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Sign conventions of inductors in circuit analysis
Here's what I know about inductors:
As per Lenz's law, inductors sort of maintain the direction of current passing through an inductor. So whenever there is an interruption on the source from which ...
- 324
0
votes
1
answer
75
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Buck and boost converter inductor confusion
I have seen that a boost converter uses the spikes of an inductor to step up the capacitor voltage as this spike is stored on the capacitor.
Why don't we get a similar effect in the buck converter? A ...
- 175k
-1
votes
1
answer
500
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Synchronous Buck in possible DCM operation?
I'm currently testing a buck converter I designed but I was running into some issues with it.
Vin = Solar Panel (30W, 17V at Vmax, 1.76A,Imax)
Vout = 12V battery
Inductor = 150uH
(Switching frequency=...
- 25.3k
1
vote
1
answer
185
views
How to choose the right inductor current limit for buck converter?
While learning and trying to make my first two-phase buck converter to power some servos, I found 2 x 3.3 uH inductors are needed for an application that will draw 30A (15A each). The problem is that ...
- 15.7k
2
votes
1
answer
114
views
How to choose the right inductor for buck converter with LM5143A-Q1? (from TI)
While working on my first voltage regulator circuit I got stuck at calculating the inductor value... The IC is LM5143A-Q1 from Texas Instruments, and according to the datasheet, the formulas for ...
- 39.7k