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Results tagged with switch-mode-power-supply
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user 339043
A switch-mode power supply (SMPS) switches been fully-on and fully-off states quickly to maintain voltage regulation. They offer lower power dissipation and run cooler than linear regulators that continually dissipate power through a transistor.
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buck/boost converters currents
I have seen that the buck and the boost converters have capacitors in them and a switching circuit that switches the circuit on/off. I want to ask whether the buck and boost converters increase the cu …
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2
answers
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Switching supply component selection
I am making a charger using a switching power supply.
Output is 5A at 5VDC.
Input is 220V AC which is converted into DC voltage using diodes and then converted to 5V by the transformer and switching c …
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0
votes
1
answer
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STM32 based boost converter noise on Rfb
I had designed a boost converter and control its duty cycle using the stm32f446ZE. My boost conveter is designed for 50-312V, 10A. I need feedback voltage but on reading that on oscilloscope I am gett …
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Accepted
STM32 based boost converter noise on Rfb
As stated by @John D in this comment,
Using a veroboard to breadboard power electronics circuits is not going to give you the best results. A good PCB layout is the best way to go. Other than that, w …
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1
answer
74
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Duty Cycle and Filtering in Switching Power Supplies
I have a few confusions to clear up. The first one is about the switching power supply.
Does the power supply simply work on the bases of the duty cycle? Like If I have a pulsating signal of 50% duty …
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0
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Accepted
Suggestion on core calculation with air gaps
The flyback converter basically works on pulsating DC voltage therefore there is a risk of core saturation. For this purpose there is an air gap introduced so that the core is not saturated.
This will …
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1
answer
132
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Suggestion on core calculation with air gaps
I was working with the SMPS transformers and found a transformer that had a small air gap already there and was used in charging system of a battery. I wanted the ferrite core for my own transformer b …
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0
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1
answer
422
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UC3842 optocoupler feedback confusion
I am having a slight confusion regarding the selection compensation pin of the UC3842 IC and the current mode control system given in the datasheet.
Why is there an RC combination at the feedback of …
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0
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1
answer
62
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Boost converter ground to ground noise issue
I’ve been working on a boost converter with all the control circuitries being controlled by a microcontroller. I am facing a huge problem of noise on the ground. I have all the grounds common and when …
- 693
0
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2
answers
143
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Variable switch mode power supply design problem
I have an issue understanding the working of a variable switch mode power supply. The power supply uses the reference voltage at the potentiometer and transfers into the VFB or feedback. Suppose I adj …
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Accepted
UCC3895 based power supply Confusion
No, the UCC3895 doesn't have an internal reference voltage set. The UCC3895 uses the TL431 for the generation of the reference as it has an internal comparator that tries to maintain the voltage at th …
- 693
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1
answer
342
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Continuous and discontinuous mode flyback Confusion
I was looking at the construction of flyback transformers and found that there are two modes - continuous and discontinuous. I have related questions:
Is the circuit design for continuous mode and d …
- 693
0
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1
answer
64
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SMPS design formulas confusion
I was working on the SMPS but I have having trouble in getting a propper method to follow before designing an SMPS. I followed a video series but I didn't know where all those formulas came from as I …
- 693
3
votes
1
answer
775
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Voltage regulation feedback loops
I have a few questions in my mind. I've searched alot but couldn't find a satisfactory answer. Kindly help me if anyone has knowledge about it. I am concerned regarding the feedback loops of the varia …
- 693
1
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1
answer
180
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UCC3895 based power supply Confusion
I was working on the UCC 3895 IC in order to work on an SMPS design. I've seen the schematics of the IC and I could find any internal reference as done in some other PWM ICs like the UC3842 having tha …
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