All Questions
90
questions
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 ...
- 31
0
votes
0
answers
28
views
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
200
views
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
0
votes
1
answer
95
views
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 ...
0
votes
1
answer
165
views
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 ...
- 355
7
votes
2
answers
745
views
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 ...
- 95
2
votes
1
answer
56
views
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 ...
2
votes
3
answers
129
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 ...
- 378
0
votes
1
answer
83
views
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 ...
2
votes
3
answers
253
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. ...
- 345
0
votes
1
answer
75
views
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 ...
- 669
1
vote
1
answer
181
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 ...
- 411
2
votes
1
answer
113
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 ...
- 411
0
votes
2
answers
347
views
Buck Converter Inductor Ripple Current and EMI
When attempting to reduce EMI at the schematic design stage of a buck converter it's often recommended that one minimize the output ripple voltage. It's clear why this would be useful.
Rarely is it ...
- 187
1
vote
2
answers
1k
views
Minimum Inductance for Buck converter to maintain CCM
In a buck converter, consider all components to be ideal; the
output voltage is kept constant at 5 V by controlling the duty
cycle. The input voltage varies between 10 V to 40 V, the
output power is ...
