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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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Extremely high current in super simple SMPS Flyback

Alright, I have found the mistake. As easy as it is... it was the lack of filtering at the input that was making indicators on lab benh powe supply going crazy. As soon as I add large 470uF capacitor …
Em Ka's user avatar
  • 167
0 votes
0 answers
1k views

Switching power supply simulation problem

I'm building a 5V power supply using MC34063 IC. Before I build a prototype, I want to simulate it in Proteus to see if everything works correctly. Here is the schematic: It is done according to the …
Em Ka's user avatar
  • 167
0 votes
2 answers
2k views

Extremely high current in super simple SMPS Flyback

I'm building an SMPS in flyback topology. In order to do it, I use UC3845CB IC. In first step, I wanted to see if it even works at all with pulse transformer that I bought, made especially for flyback …
Em Ka's user avatar
  • 167
0 votes
2 answers
3k views

Flyback converter - turn ratio

I'm building a smps using flyback topology with maximum aoutput voltage of 46V. I'm a novice, however I have read a lot about impulse power supply design. Right now I'm about to buy a transformer, and …
Em Ka's user avatar
  • 167
-2 votes
1 answer
4k views

Adjustable current limiting in flyback converter using TL431

I'm building a SMPS and I would like to have a current limiting feature on the output. I'm trying to make a feedback loop using TL431, shunt resistor, optocoupler and a potentiometer, but no luck this …
Em Ka's user avatar
  • 167