All Questions
59
questions
-1
votes
2
answers
455
views
build or buy buck converter
Hi I am looking to step down a 10 volt DC to 5 DC with low output current (less then 1 amp)
Is it the best to build a buck converter or to buy it ready ?
thank you
Actually I am using an arduino,
I ...
- 29
0
votes
2
answers
1k
views
Using parallel inductors on LM2596
In the datasheet of LM2596, 33uH or 47uH inductors are recommended for 5V output. I can't find any high amperage inductors of those values. So that if I use 100uH of 2 inductors in paralell(they will ...
- 71
3
votes
3
answers
2k
views
Step-Down/Buck-Converter: How to replace feedback voltage reistor divider to electronically control the regulator output voltage
Most today used switching regulator ICs that I've seen have some kind of feedback voltage pins. I think I've pretty understood the way it works:
A resistor divider from output to ground is created to ...
- 288
2
votes
2
answers
2k
views
Cooling buck converter mosfets by placing on bottom layer of PCB - a problem?
I have a design and layout for a buck converter which currently sits on one layer of a 2 layer PCB. I would like to force-cool the heat generating components of the board by placing them directly onto ...
- 133
1
vote
2
answers
429
views
What is the equivalent of a buck converter for AC voltage?
A have researched and found that a buck converter is used for stepping down voltage in DC applications.
However, my application uses AC current. I have christmas lights that plug into the wall and I ...
- 506
1
vote
1
answer
96
views
What is the most convenient way to make/buy step 66V DC down to 12V DC?
There is a big battery that I have which has 64-67 volts, and I need constant 12 DC volts from it.
I tried ebay, but the best buck converter that I found had limit of 55 volts. My local electronic ...
- 115
0
votes
1
answer
96
views
Heat Cable: directly powered with 230V AC vs. 12V DC with step-down efficiency
Is it any less efficient to drive a 12V version of a heat cable from a step-down buck than directly powering a 230V version of it directly from the wall?
- 15
1
vote
2
answers
864
views
MP1584 inductor calculation
I would like to calculate the inductor value for MP1584EN.The datasheet says:
$$L= \frac{V_{out}}{f_s \Delta I_L} (1- \frac{V_{out}}{V_{in}})$$
On the first page of the datasheet there is a typical ...
- 79
0
votes
1
answer
187
views
Do the wattage from connected devices need to add up with the given wattage from a step-down converter?
A step-down buck converter converts 36V to 12V 36W.
Does it mean that the sum of all the wattage from all connected devices need to be 36W? OR Does it mean that I can connect multiple devices not ...
- 75
-1
votes
1
answer
110
views
Synchronous Buck Converter loop function
I have been reading the data of this Buck converter model, but on the block diagram scheme. I don't understand what does the indicated feedback loop do.
The buck Convert model is LM5165-Q1 and this ...
3
votes
2
answers
300
views
Low cost 30A 24Vto12V stepdown converter [duplicate]
I'm trying to design a 24V to 12V step down converter. Power efficiency is not that important to me, but I want to come up with the cheapest solution possible. I don't need isolation neither. So I ...
- 355
0
votes
1
answer
2k
views
Need circuit for 12 volt 2 Amp step down power supply from 18 volt 1.5 Amp Input
I have a power supply which outputs 18v 1.5 amp. For the purpose of my project, I need a 12v 2 amp power supply. I was wondering, if I can make a simple buck converter to convert 18v 1.5amp DC to 12v ...
- 754
5
votes
2
answers
7k
views
Input voltage for feedback pin on LM2596 Voltage regulator
I am using LM2596 for a dc supply where I could alter the output voltage. Datasheet here.
I have setup according to page 9 "Adjustable Output Voltage Versions". Everything worked fine. The output ...
- 255
1
vote
1
answer
634
views
Ideal ripple current on a DC to DC step down switching regulator
I was studing a linear's datasheet, a step down DC to DC switching regulator.
More specific: the LTC3615.
I am a little bit confused with ripple curent which involved to inductor value calculation. ...
- 2,053