All Questions
34
questions
0
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111
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I need to make a separate buck and boost converter with 200W power rating
I have to make two converters. One buck going from 240VDC to 12VDC 30 amperes and one boost from 12VDC to 24VDC, possibly with the ability to change from 6 to 30 amperes.
A few more details: The buck ...
1
vote
1
answer
196
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Using a capacitor to handle the inrush surge power of a fridge
I have a household mini fridge connected to my off grid electrical system, and recently I bought a smaller inverter just for the fridge so that I can turn my larger inverter off to reduce power ...
- 11
1
vote
3
answers
112
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Unable to start and run 12 V DC pump, only jolts
I have a 12V 19 watt DC water pump (800LPH), A 12 V DC step down converter, and two Dewalt batteries.
One at 18 V 5 Ah, other 18-54 V 9 Ah.
I've connected pump to step down to battery correctly, but ...
- 23
0
votes
1
answer
84
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How to convert a {200 VDC, 3A} power supply into a {12 VDC, 50A} source?
As title states, want to convert a high-voltage, low-current DC bus to a low-voltage, high-current DC bus that's more compatible with electronics circuits. This seems to be a pretty large input for a ...
- 31
2
votes
3
answers
75
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How to use a 49Voc solar panel for USB charging after a calamity (without using proper solar charge controllers)?
Some background first, actual question at the bottom:
Last year December my area in the Philippines was directly hit by a super typhoon, international name: Typhoon Rai.
For three weeks after that ...
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1
vote
1
answer
215
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BLDC Motor ESC/Controller Analog Receiver PWM/Wiring - Won't detect with potentiometer
I have an RC/drone ESC that takes a PWM input signal at 3.3 V/5 V for throttle control, but has no onboard buck/BEC. I have the illustration below for my current setup.
This motor works excellent with ...
- 59
0
votes
2
answers
174
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I would like to drop a variable DC voltage from input 30Vdc to 200Vdc to output 5Vdc with a max 200mA
I am new to electronics and would like some help if possible.
The incoming voltage will be variable from 30Vdc to 200Vdc coming from a bank of solar panels. The output is 5vdc at a max of 200mA. I ...
- 11
0
votes
1
answer
172
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How can I achieve a 25V - 5V @10A buck circuit, and a 25V - 8V @6.5A buck circuit? [closed]
I'm a computer engineer major in my senior year.
My team and I are making a SmartKart, and I'm responsible for power management and power designing.
Right now, based on several components we will be ...
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-1
votes
2
answers
321
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Synchronous DC-DC buck converter I saw online
I constructed this synchronous buck converter circuit I found online and I wanted to know how reliable it actually is: ( I used a battery source for the VCC+ pin on the op-amp because the 12 V line ...
- 633
-1
votes
1
answer
253
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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
0
votes
0
answers
111
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Buck converter design review - updated
Last week I asked this question attempting to find a solution to efficiently converting higher voltage to lower voltage.
From the answers, I arrived at TI Power Designer and I ended up with this ...
- 360
2
votes
3
answers
6k
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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 ...
3
votes
3
answers
1k
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What will happen if you supply a higher voltage to a buck converter? [duplicate]
The title says enough, but let’s give a real life example too. Take one of those LM2596 35V boards. What will happen to it if it gets 50V on the input?
Most likely it will burn, but will this voltage ...
- 930
0
votes
1
answer
489
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MPPT buck converter vs Ordinary buck converter?
I’m building a small arduino project which is going to be powered using a small solar panel setup with a battery as it’s UPS for power backup during the dark.
The setup is going to be like
Solar ...
- 690
0
votes
2
answers
1k
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Limit charging current to a smartphone
I'm using an LM2596 buck converter set to 5.0V to power a bunch of stuff among which is a smart phone.
My total consumption is around 1A excluding the phone. I'm not really sure what will happen if ...
- 930