All Questions
99
questions
-1
votes
1
answer
256
views
Bootstrap cap value and how it relates to fsw and duty cycle?
I am designing a synchronous buck converter with mppt. I have a question about the bootstrap capacitor value. Knowing that the duty cycle and fsw are dependent on this value. What is the best approach ...
0
votes
2
answers
412
views
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 ...
4
votes
2
answers
167
views
Buck, Boost..etc Is there always an IC for that?
First of all I am still in school so perhaps I have not been exposed to material that may answer this question for me.
I have recently become interested in power electronics. I have purchased a book ...
- 891
2
votes
1
answer
2k
views
How does soft start work in TI buck regulators?
I am planning to use "TPS54341" in my design.
I am curious about how the soft start circuit internally works in TI regulators.
The datasheet explains to how to use it, however, does not go in much ...
0
votes
1
answer
247
views
Trying to power 100 Arduinos from single power line
I'm trying to power up to 100 Arduinos that will be spread across a 25m wall using a single power line.
The idea is each Arduino will have a few a few buttons, leds & an oled screen and will all ...
- 9
1
vote
1
answer
142
views
LTC1775 Buck converter component question
I am trying to design a 12v,10A buck converter using a with LTC1775 and have gone through the calculations assuming a 40% inductor ripple current and a switching frequency of 150kHz. This gave an ...
- 15
0
votes
2
answers
328
views
Current relationships across a voltage step down convertor
This question arose from a conversation over the weekend and we tied ourselves in knots trying to get to the bottom of it. I didn’t have time to put a simple circuit together so it would be great to ...
- 105
0
votes
2
answers
846
views
Altering switching power supply schematic to generate 5v instead of 3.3v at 5A
Im fairly new to this level of more complex circuit design so forgive me if I sound like a newb.
I'm creating a DC/DC Step down buck regulator using the LM22678 switcher from texas instruments: http:...
- 83
0
votes
1
answer
26
views
Why is WLED_SW connected to supply [closed]
I am usin this http://www.ti.com/lit/ds/symlink/tps68470.pdf and in the schematic they tell us to connect the WLED_SW through an inductor to an input supply. I though the WLED_SW(switching node) is ...
- 3
0
votes
0
answers
86
views
Power source with buck converter, load and supercap
I have the following circuit created in MATLAB Simulink:
I have a power source (Vfc,Rfc) on the left. Its operating point is set by using a buck converter (mosfet,diode,L,C1), which controls the ...
- 391
0
votes
0
answers
231
views
Gate Driver Not Working as Expected. Why?
I am using the ADuM5230 gate driver to drive an N-channel MOSFET in a basic buck converter circuit that will convert a 12V DC input to a 5V DC output. The buck converter will operate at a 10kHz ...
- 1,191
1
vote
1
answer
278
views
Single input dual output simulation help
Ive been using PSIM and there is a problem with the circle mosfet wont turn on. Ive the correct duty cycle and input voltage is higher than the threshold. Can someone simulate it on another simulator ...
- 11
0
votes
1
answer
2k
views
Do I need to protect buck converter when switching to alternate power source?
Noob question here; please pardon my ignorance. I am trying to power some 12v devices, (e.g. Peltier cooling device and fan ~4A), optionally from one of two power sources:
12v DC In
DROK Waterproof ...
- 3
0
votes
2
answers
2k
views
Buck converters in parallel
The above problem was asked in GATE 2018 Electrical paper. I got the answer as 50. But I am confused if my answer is correct. The funny part is all top 3 coaching institutes has given 3 different ...
- 545
5
votes
1
answer
12k
views
How to power STM32F103C8T6 in a 'real' project?
I'm sorry for this probably very generic question, but I cannot find a good answer.
I have several STM32(F103C8T6, a.k.a. Blue Pill), which I now power via a ST Link (giving 5V via USB).
The STM32 ...
- 14k