All Questions
99
questions
0
votes
1
answer
86
views
Buck converter: Additional circuitry working not clear
Saw the below schematic of a buck converter, but not able to figure out the working of the marked section. It is shown Node 1 is at 16 V.
Looks like sensing the differential voltage across inductor, ...
- 3,032
2
votes
0
answers
95
views
Is it true that power supply design is difficult when input voltage range is wider?
During power supply (buck converter) testing, I had seen the lowest efficiency values corresponding to highest input voltage. I thought if the design meets this worst case scenario, it should be ok no ...
- 3,032
4
votes
3
answers
118
views
Looking for help choosing a voltage converter / regulator for microcontroller [closed]
I am designing a board that will need 3.3 V, 2.8 V, 1.5 V, and ideally 1.2 V rails. The board will be powered by a 12 V power supply so for stepping from 12 V to 3.3 V I am planning on using a buck ...
2
votes
3
answers
164
views
Buck Converter Theory Confusion
For a buck converter, I'm having a hard time conceptually understanding what is happening.
Here's my thought process: When the switch is closed, their is a positive voltage across the inductor equal ...
- 393
1
vote
0
answers
80
views
Buck input decoupling capacitance and efficiency
I'm working on an high frequency buck (>10 MHz) and there's a problem with the input decoupling capacitance, the one used to filter battery harmonics and have a more stable voltage with less ripple....
- 61
-1
votes
1
answer
104
views
Understanding Buck Converters [closed]
I need a little help designing a buck converter. Basically I want to generate a 5V output that will stay the same regardless of load resistance and that will exist when the input varies between 12 and ...
- 1
2
votes
2
answers
1k
views
Power Supply Interview Questions
I recently attended a Electronics interview.
I was asked this question - What should I take care in a buck converter layout?
One of my response was like - To place all the associated capacitors, ...
user220456
-1
votes
1
answer
254
views
Changing the feedback branch in Buck converter
I am trying to implement output voltage remote sensing in Buck converter. I am taking the feedback from the load side. I have made a circuit which can act as a local or remote as per the active ...
- 1
2
votes
3
answers
2k
views
Buck Converter Inductor current at Steady State
I am trying to learn about Buck converters from the below page.
https://www.allaboutcircuits.com/technical-articles/analysis-of-four-dc-dc-converters-in-equilibrium/
Below line is confusing me ...
- 2,593
2
votes
1
answer
754
views
Practical vs. theoretical buck converter
I am currently looking at open loop buck converters. I am running it with the following:
Switching frequency (f) = 62500
Inductance (L) = 100e-6
Input voltage (Vi) = 5
Output current (Io) = 0.06
...
- 451
1
vote
2
answers
324
views
Do I need to include overhead when picking a power supply?
I need to power 40 Raspberry Pis, each requiring a 5V input and have a maximum current draw is 2.5A.
This would mean:
5 x 2.5 = 12.5W
12.5W x 40 = 500W
That I ...
- 408
1
vote
0
answers
76
views
Buck boost converter inductor rating
I am designing a buck boost converter with a 12v output, and 50A current output.
The input range is 8v-14v from a supercapacitor. However based on the Texas Instrument buck boost design sheet Basic ...
- 11
0
votes
2
answers
302
views
How to create a high power buck converter power supply? [closed]
I am building a device that requires a lot of energy at its peak, about 30W.
The kind of supply I want to build looks like this:
I understand that this is made of a controller which switches a ...
- 360
0
votes
0
answers
84
views
Absurd screeching from a buck convertor
I got a buck converter from Amazon. This- https://www.amazon.com/MCIGICM-step-down-Converter-3-0-40V-1-5-35V/dp/B06XZ1DKF2
Now it's soldered onto a custom PCB I designed. I'm supplying it with 12V and ...
- 11
2
votes
1
answer
343
views
How to step down the voltage efficiently
I need to power three devices/loads from a single DC source (a 48V at 200A battery). The buck converter used is this.
The three loads are:
RFID reader (24V DC @ 2.1A)
Rasberry Pi 4 (5V DC @ 3A)
DC ...
- 2,391