Finally I can understand what an SMPS is about. A clear explanation of the theory behind the design. A very useful video. I incorrectly thought that a transformer was eliminated in the design. In fact, it is made smaller due to the higher frequencies involved.
Im someone with very very basic understanding of electronics, and this was incredibly helpful. Theres a lack of information in this area on the internet, and the stuff out there is chock full of misinformation, so Im glad that I could find this easy to understand video.
It can switch from 5 v to 9 v, 10,8v, or 12 v usb, supported by Huawei chargers. The device such as power bank needs a thermal sensor. The switching happens when a transistor and variable resistor component applies an extra load in phones, rcing the charger to switch to stronger output. When the battery is full, the phone instructs the charger to stop and cool down, while tranformers remain hot.
I'm confused. Isn't the voltage alternating current after the transformer? In the graph looks like pulsing direct current, but I've the notion that it should be a square alternating voltage. That's exactly why a DC rectifier is needed after the transformer. The graphs used are confusing and misleading.
Woud wish an explanation about transformer magnetic saturation. 😊 Your schéma présent continu voltage between vcc and 0 V for input of the transformer. So in that case it will saturate quickly
But why laptop power supply have no transformer component? isn't it a Switching Mode Power Supply? how does it lower down the voltage? or the transformer is there but just small one?
There is a transformer in AC/DC laptop power supplies - it's typically not exactly "small" compared to the size of the entire supply, but it is much smaller than one that would be needed in a linear power supply (I'm not aware of any modern laptop chargers that are not SMPS). If you search UA-cam you can find some teardown videos that show the transformer in a laptop power supply. Hope that helps!
Kindly note for shock hazard,no power supply is safe in case of SMPS too ,if not stepped down to a lower voltage level and raise the level again as in case of oscilloscope and television and video recording and replay systems,,,so be on safe side and have the multiple voltage and signal sources by well isolated transformers to work around television and oscilloscope and Radar displays,not talking about transmission systems CAUTION ⚠️
You seem to know what you're talking about. I wonder if you could help me I need to run a 24vdc power tool from 240 ac would a switching mode power supply do the job thanks in advance Adrian
smps is not include pwm switching circuit it just for simple application didnt need high amp in diffrent mode of operating it used in crt tv by tow transistor and photocupler and in charger used tow transitor one drive base and mangment in the same time and other is main transistor conected with transformer
It's inefficient (conversion wise), and produces an awful power factor. It also requires larger capacitors to keep the output stable, which naturally cost more. I'm sure there's other reasons- maybe it causes more coil whine?
This „understanding“ series is really well made. Good explanation and a pro narrator.
Thank you! There are many, many more videos coming!
Finally I can understand what an SMPS is about. A clear explanation of the theory behind the design. A very useful video. I incorrectly thought that a transformer was eliminated in the design. In fact, it is made smaller due to the higher frequencies involved.
Im someone with very very basic understanding of electronics, and this was incredibly helpful. Theres a lack of information in this area on the internet, and the stuff out there is chock full of misinformation, so Im glad that I could find this easy to understand video.
I really like the logical and simple way you explain complex topics.
Thank you! I like to tell people that I'm making the videos I wish I had when I started out working as an engineer :)
Very basic video but awesome easy to digest
Thanks this really helped understanding how modern welders and inverters/vids work.
Very well explained!
Thank you! Really appreciate it!
A LOT INFORMATION HERE TO THINK ABOUT
Thanks Sir:
Ldo vs Switching regulator circuit on Advantages and Disadvantages Comparative Differences
It can switch from 5 v to 9 v, 10,8v, or 12 v usb, supported by Huawei chargers. The device such as power bank needs a thermal sensor. The switching happens when a transistor and variable resistor component applies an extra load in phones, rcing the charger to switch to stronger output. When the battery is full, the phone instructs the charger to stop and cool down, while tranformers remain hot.
Great explanation! Could you explain how the input filter and power factor correction work too?
I'm confused. Isn't the voltage alternating current after the transformer? In the graph looks like pulsing direct current, but I've the notion that it should be a square alternating voltage. That's exactly why a DC rectifier is needed after the transformer. The graphs used are confusing and misleading.
Why do we often see a pair of dual diode packages for secondary rectification?
In the thumbnail, the feedback is shown as positive square wave. Is it not just a voltage to change the bias of the mosfet?
thank you very much, it is useful and informative video
Nice
Nothing said about the PWM driver, which drives the MOSFET by sending pulses to the gate.
Woud wish an explanation about transformer magnetic saturation. 😊 Your schéma présent continu voltage between vcc and 0 V for input of the transformer. So in that case it will saturate quickly
Very clear
Thank you for watching!
Good explanation keep it up 👍
Thank you!
What factor influences how efficient smps is? Why does some PSU have a gold rating while other bronze?
well done..
But why laptop power supply have no transformer component? isn't it a Switching Mode Power Supply? how does it lower down the voltage? or the transformer is there but just small one?
There is a transformer in AC/DC laptop power supplies - it's typically not exactly "small" compared to the size of the entire supply, but it is much smaller than one that would be needed in a linear power supply (I'm not aware of any modern laptop chargers that are not SMPS). If you search UA-cam you can find some teardown videos that show the transformer in a laptop power supply. Hope that helps!
@@pauldenisowskiI see, thanks for the confirmation, I thought it had no transformer since the size is very small compared to the PC PSU.
Thanks
Thanks!
Kindly note for shock hazard,no power supply is safe in case of SMPS too ,if not stepped down to a lower voltage level and raise the level again as in case of oscilloscope and television and video recording and replay systems,,,so be on safe side and have the multiple voltage and signal sources by well isolated transformers to work around television and oscilloscope and Radar displays,not talking about transmission systems CAUTION ⚠️
You seem to know what you're talking about. I wonder if you could help me I need to run a 24vdc power tool from 240 ac would a switching mode power supply do the job thanks in advance Adrian
In short (hehehe) it is an oscillator that controls a rectified voltage.
Can transformer work on pulsating DC??
Pulsating DC is not actually DC. For instance, the “chopped” DC square wave is actually a sum of infinitely many sinusoidal (ie AC) waves.
A transformer can work on pulsating DC.
smps is not include pwm switching circuit it just for simple application didnt need high amp in diffrent mode of operating it used in crt tv by tow transistor and photocupler and in charger used tow transitor one drive base and mangment in the same time and other is main transistor conected with transformer
if your ultimate goal is to reduce the voltage, why use a FBR? Why not just grab the half of the cycle?
It's inefficient (conversion wise), and produces an awful power factor. It also requires larger capacitors to keep the output stable, which naturally cost more. I'm sure there's other reasons- maybe it causes more coil whine?
@@Originalsunrunner20 Thanks. I figured it might be inefficient, but I didn't know it would require larger capacitors.
@@Originalsunrunner20 Thanks - you beat me to it :)
He missed one disadvantage. Power switching devices can go "boom" quite spectacularly .
Indeed :)
Isn't an smps cheaper than bulky copper monstrosity.
In many cases, yes. :)