All Questions
63
questions
1
vote
2
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1k
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Is there a thumb rule for the input and output capacitor for DC-DC converters?
If we are using a buck converter of say 5V 1A output, we definitely require input and output capacitors.
Just without making any calculations, is there a thumb rule on what the values of the input and ...
user220456
2
votes
2
answers
1k
views
Power Supply Interview Questions
I recently attended a Electronics interview.
I was asked this question - What should I take care in a buck converter layout?
One of my response was like - To place all the associated capacitors, ...
user220456
0
votes
2
answers
143
views
Maximum Voltage at CBOOT resistor and capacitor
I am using this Buck Converter to generate 3.3V output at 0.45A with Switching frequency of 2.1MHz.
Input voltage range is 6V - 16V. LM63625 2.5A Part is selected.
My questions :
Question 1:
In the ...
user220456
2
votes
1
answer
734
views
Constant Current of an XL4016 Buck Power Module [duplicate]
Hi have this buck converter
: Step Down Buck 9A 300W Converter 5-40V To 1.2-35V Power Module XL4016
I've done my research, read some posts and articles but I'm still quite confused, some say a ...
0
votes
1
answer
88
views
How to set the boost output voltage in this IC?
I want to use this boost IC to drive an LED string.
I have 9 LEDs. 300mA forward current and 3V as typical Vf.
Can someone guide me on how to set the output voltage of the LED string using that IC?
user220456
2
votes
1
answer
272
views
Buck converter current
I have this synchronous buck converter.
Input voltage - 8.7V
Output voltage - 5V
Switching frequency - 350kHz to 450kHz
Output load current is 2A
Schematic:
I have an input capacitor of 68uF and an ...
user220456
0
votes
1
answer
423
views
When and how does a buck converter behave in a boost converter mode?
My question is with reference to this answer for this previous question.
The answer states that a buck converter will behave in a boost mode for some cycles during light load or no load condition.
Can ...
user220456
2
votes
1
answer
418
views
Buck converter problem
I have this buck converter - BD9G201EFJ-M
Buck converter specifications:
Input voltage - 18V to 32V
Switching frequency - 300kHz
Output voltage 9V
Load current - 0mA to 200mA maximum.
I am ...
user220456
4
votes
1
answer
902
views
DC/DC Switching Converters: Is it possible to run a current-mode converter in voltage-mode only?
DC/DC Switching Converters: Is it possible to run a current-mode converter in voltage-mode only?
If so, is there an example using a buck converter?
In particular, I'd like to use UC3843 (LT1243) in ...
- 45
2
votes
2
answers
1k
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Understanding Buck Converters and Solar Panels
I have a solar panel rated at 5V 80mA and want to increase the output current significantly higher to around 500mA and decrease the voltage to either 3V or minimum of 2.7V, how can I go about this?
I ...
- 81
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
0
votes
3
answers
1k
views
Buck converter source current draw
I'm doing some calculations for a system that is going to use a few buck converters. I need to make sure that the battery will be able to feed enough current but I'm not 100% certain how power on the ...
- 930
0
votes
3
answers
395
views
Which is more efficient: A much larger than needed step-down voltage converter, or one rated closer to the actual load?
I'm designing a custom audio system for my electric motorized pedicab. The motor of my cab runs on a 48 V 33 Ah battery, and I have planned to use a 48 V to 12 V step-down converter to simultaneously ...
2
votes
2
answers
6k
views
Torque and speed control of a DC motor
I'm new to electronics and this is my first post so please be patient with me.
Introduction
I am required to design a rehabilitative exoskeleton-like knee-brace to assist sit to stand, I have faced ...
- 21
0
votes
0
answers
45
views
TPS562208DDCT current problem
I have attached a PSU design which I have created. The input voltage is between 12 and 24V DC.
The first stage creates an isolated output voltage of 7V that is then fed into the two TPS562208DDCT (...
- 51