All Questions
99
questions
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
5
votes
1
answer
247
views
Art of Electronics - buck converter ripple current derivation
I'm struggling to understand how this buck converter equation in The Art of Electronics can be true.
Page 642 shows this Buck Converter:
and then these graphs of current and voltage are also provided
...
- 165
4
votes
4
answers
573
views
Inductor energy storing in buck converter
I am trying to understand inductor energy storing during ON time in buck converter.
Energy stored in inductor of buck converter is (Input Power -Output Power)*Ton
Lets say output power is 5 W and ...
- 119
4
votes
2
answers
360
views
Are Buck converters conceptually same in low/high power applications?
I am new to power supply circuits. I am studying datasheet of buck regulator LM22676 which generate 5V/3.3V dc for micro-controller supply in one of my system.The datasheet says it has a N-channel ...
- 333
4
votes
1
answer
880
views
Why 2 diodes in parallel buck converter design?
I have been looking up dc-dc buck converter designs and have question regarding the diodes.
It says "5A High current Schottky diode" is it common in buck converter design to parallel ...
- 127
4
votes
4
answers
2k
views
Combining LDOs in an effort to increase current
Is there any way to combine 2 (or more) similar LDOs with fixed output voltage so the total output current would be increased?
Buying another LDO is possible but I have a large stock of 1A LDOs and I ...
- 2,127
4
votes
2
answers
2k
views
Combining Buck converter and LDO
I've been wondering if its common and a good idea to combine a buck converter with a LDO to for example move 5V down to 1V for a microprocessor.
I'm unsure about the stability of the processor doing ...
- 219
4
votes
3
answers
118
views
Looking for help choosing a voltage converter / regulator for microcontroller [closed]
I am designing a board that will need 3.3 V, 2.8 V, 1.5 V, and ideally 1.2 V rails. The board will be powered by a 12 V power supply so for stepping from 12 V to 3.3 V I am planning on using a buck ...
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
4
votes
1
answer
364
views
Design considerations for low-current SMPS application
I've got a project I'm working on that is powered by a single Lithium-Ion battery (let's say design range is 2.5V to 4.2V), and a nRF52832-based MCU. I've decided to design a power topology that goes ...
- 6,376
2
votes
3
answers
2k
views
Buck Converter Inductor current at Steady State
I am trying to learn about Buck converters from the below page.
https://www.allaboutcircuits.com/technical-articles/analysis-of-four-dc-dc-converters-in-equilibrium/
Below line is confusing me ...
- 2,593
2
votes
3
answers
1k
views
Buck converter adjustable output-voltage using digital potentiometer [closed]
I am trying to design a buck converter using an LM2576HV (Vref: 1.23 V) and a digital potentiometer (input: 48 V, output: 0 to 48 V, Imax= 3 A).
The digital potentiometer with the highest supply ...
- 21
2
votes
2
answers
321
views
How can I replace a potentiometer with a fixed resistor on a buck converter?
I want to use a buck converter which steps down 12 V DC to 5 V constant DV output to power my custom PCB.
I came across a buck converter in market which can do it but there is potentiometer on it ...
- 99
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
2
votes
3
answers
301
views
Why do some switching regulator ICs have single VCC pin but multiple PGND pins?
This is a follow up question to Reason of multiple GND and VCC on an IC
I found a switching regulator IC (buck) that has multiple PGND pins and one analog ground (AGND). It has only one VCC pin.
(...
- 3,032