All Questions
103
questions
7
votes
6
answers
2k
views
Extract 5W low voltage power from 3000W high voltage source
I have a solarpanel array that generates 600V, 5A (3kW). I want to create a small electronic unit to measure the DC current and voltage and transmit this wireless. For this I have an electronic board ...
- 173
6
votes
7
answers
8k
views
How to reduce MOSFET heating in Buck Converter
I have designed this Buck Converter which convert 60VDC to 12VDC at 10A.
Switching Freq 100KHz.
Facing MOSFET too much heating issue.
MOSFET ON time and OFF time is decided by a UC3845B based circuit. ...
- 97
6
votes
2
answers
5k
views
Behavior of Boost and Buck Converters
I have a couple questions about boost and buck converters.
First, do they try to hold the output voltage constant, or do they alter the input voltage by a constant factor? For example, if I change ...
- 436
6
votes
1
answer
2k
views
Operation of a Buck Converter
I hate to be asking this, but I just don't understand the operation. I've been reading various resources, mostly this: http://services.eng.uts.edu.au/~venkat/pe_html/ch07s1/ch07s1p1.htm though. From ...
- 420
5
votes
2
answers
1k
views
Buck converter operation
I have been reading about the buck converter and have also referred to the various online resources like here.
In the above circuit, as I understand, when the switch closes, current starts to ...
- 2,366
4
votes
3
answers
3k
views
How synchronous buck converters continue to operate in light load conditions
simulate this circuit – Schematic created using CircuitLab
For all intents and purposes lets assume this basic power stage of a synchronous buck design above. Let's also assume a steady state ...
- 41
4
votes
1
answer
407
views
What's an efficient way to get below the standard 1.25V on buck converters?
So, I purchased a buck converter which was advertised to be able to range down to 0.8V but, as you can probably guess, it only goes down to 1.25V which I understand is the reference voltage for the ...
- 793
4
votes
3
answers
13k
views
What would happen if you connect a solar panel to a buck-boost converter?
What would happen if you connect a solar panel with the following characteristics:
Max Power:3.5W
Voltage: 6V
Open Voltage: 7.2V
To a buck-boost converter that convert an input voltage in the ...
- 341
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
3
votes
4
answers
726
views
Is it possible for buck boost converter to output -48V with +12V input?
I have a school task for creating a Buck Boost converter that takes 12V and outputs -48V. I have done some digging and couldn't ...
3
votes
2
answers
233
views
Advice and critical remarks regarding the manufacturing of a DC-DC step-down converter
I'm in the third year of my electrical engineering major and I want to take things a bit further than the usual analogue electronic circuits I've studied thus far by making a DC-DC step down converter ...
- 225
3
votes
3
answers
9k
views
Not getting stable voltage output with DC-DC Buck Converter
Coming from a computer science background, I'm new to electronics and my first post here. I'm working on a hobby project with the intention of designing a PCB eventually and the first step is to ...
- 31
2
votes
2
answers
3k
views
Inverting (Buck-boost) converter polarity problem
I have trouble understanding something in the circuit below. It is inverting converter, seems quite easy, but the part I don't get is when the switch is OFF we have forward-biased diode, i.e. plus on ...
- 1,216
2
votes
3
answers
6k
views
Is it better to have a higher Vgs than Vds on a MOSFET (n-channel)?
I've been studying MOSFET switching applications recently, and have been playing with the Circuit Simulator Applet here. In my diagram below, I have Vds usually set to either 12 or 14, as I am trying ...
2
votes
1
answer
238
views
Critical inductance for buck converter
I have this problem: -
The critical current must be \$P_{out} = V_{out}I_{crit} \Rightarrow I_{crit}=\dfrac{45\text{W}}{16\text{V}} = 2.8125 \text{A} \$
Using eq. 3.43 from Ned Mohan's book we have
$$...
- 4,145