All Questions
Tagged with buck power-electronics
13
questions
4
votes
2
answers
243
views
Equation 20.16 Proof
In studying the Fundamentals of power electronics by Robert Erickson I do not understand how they arrived at the equations for current and voltage
Link to Book, page 772 is where I am at
https://...
- 43
1
vote
4
answers
1k
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Capacitor voltage in buck converter and how it steps down voltage
I am having an issue understanding how the a buck converter circuit actually steps down the input voltage. Specifically, my issue is regarding the capacitor charging and discharging. Let's consider ...
- 123
0
votes
3
answers
5k
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Need a buck circuit to go from 48V down to 12V-9V less than 30mA (or half the supply input for a regulator)
I need a circuit to go from 48V down to 12V-9V less than 30mA, it doesn't need to be a buck converter. I don't want to use transformers as simplicity is good (and adding components to the library is ...
- 84.8k
6
votes
4
answers
509
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Is the zeta DC-DC converter topology scalable to 50kW / hundreds of amps?
Question
The task at hand is to build a 50kW (e.g. say 125VDC 400A out) DC-DC converter that charges a large lead-acid stack with said 400A and accepts a somewhat wide input voltage range. With that ...
- 5,469
6
votes
2
answers
967
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How to measure the stability of a buck converter using LTspice
Below is my buck converter circuit. How can I check its stability using LTspice?
I need to measure GM and PM.
Is this true that a 30–60 degrees phase margin and a gain margin of 2–10 dB are desirable ...
- 2,593
4
votes
2
answers
3k
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LTspice Frequency Response Analyzer (FRA)
This post is a continuation of this question.
LTspice recently introduced a new feature called frequency response analyzer, see the image below.
The green box shows the symbol for FRA. If you click ...
- 2,593
3
votes
3
answers
7k
views
Buck Converter vs Voltage Divider
Why would I prefer to use a buck converter over a voltage divider, and vice-versa?
I know that voltage dividers are less complex and cheaper than buck converters, given that voltage dividers are ...
- 449
2
votes
1
answer
2k
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Why overshoot happens in Inductor voltage in an open loop DC-DC buck converter?
I am extremely confused about why this overshoot occurs in the Inductor voltage waveform in buck converter and also why the time to achieve steady state reduces on increasing the load resistance.
...
- 23
2
votes
4
answers
4k
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Error in simulation of a DC/DC buck converter using LTspice
I am using LTspice to simulate a buck converter, but I am not getting the expected output voltage and I don't understand why.
The specification is simple: I need to get an output voltage which is ...
0
votes
2
answers
272
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Why dc component I must flow entirely through the load resistance R in buck converter?
The excerpt below is from Fundamentals of Power Electronics by by Dragan Maksimović and Robert Warren Erickson.
Can anyone explain the why question in the yellow part below? Why dc component I must ...
- 1,649
0
votes
2
answers
412
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Buck Converter won't switch properly
I'm trying to use TI's LMR16006 Simple Switcher Buck Converter to regulate 48V down to 5V on my circuit.
I used TI's WebBench tool to calculate component values for their reference design, and had a ...
0
votes
2
answers
5k
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Buck Converter with Gate Driver
I designed a simple buck converter to meet the following specs (I have attached the schematic):
Vin = 17.4V
Vout = 12V
D = 0.69
Switching Frequency = 50kHz
Inductor Ripple Current = 20% of ...
- 79
0
votes
1
answer
3k
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Buck converter using LC input filter
Can somebody explain me about the working and waveforms of Buck converter with LC input filter? I can't figure out the output voltage expression using Vg, R and D(duty cycle) and the dc voltage and ...
