Constant on time control of PWM converters: An intuitive explanation

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Constant on time control of PWM converters: An intuitive explanation

Рет қаралды 7,528

Sam Ben-Yaakov

Күн бұрын

Пікірлер: 29

@ivanperezs 4 жыл бұрын

Thank you, Professor Ben-Yaakov. I always learn something new in your videos.

@sambenyaakov 4 жыл бұрын

Thanks Iván

@souravrangnekar2347 4 ай бұрын

Thank you for lovely explanation!!!

@sambenyaakov 4 ай бұрын

Thanks

@abhishekdwivedi556 4 жыл бұрын

Indeed a good lecture.

@sambenyaakov 4 жыл бұрын

Thanks

@gutony3151 4 жыл бұрын

Awesome, thanks a lot.

@sambenyaakov 4 жыл бұрын

Thanks.

@jffighting Ай бұрын

Thank you, Prof. Ben-Yaakov, very intuitive explanation for this constant on time control for buck converter. Do you know who is the first person to propose this constant on time or constant off time control for buck converter?

@sambenyaakov Ай бұрын

No. Will be happy to find out.

@jffighting Ай бұрын

@@sambenyaakov Thank you for your reply, Prof. Ben-Yaakov. I tried to find the first reference but not be able to make it. It seems that everyone took it for granted before 1990. But I found one patent from Infineon (US7521913B2) that they use output voltage to adjust the pulse width and frequency during load transient. The technique in this patent is very similar as the COT control during load step up. Will this claim still be valid?

@sambenyaakov Ай бұрын

@@jffighting 🤔

@gnanaprasad9874 4 жыл бұрын

Great!!! Thank you. Prof. Yaakov, Can you please do a video on controller working of multi phase buck converters?

@sambenyaakov 4 жыл бұрын

Have you watched this? kzfaq.info/get/bejne/Z8-hYLxyl8_an6c.html

@vinayupadhyay9422 3 жыл бұрын

@@sambenyaakov Is there any video for Coupled Inductor Multiphase buck converter ?

@ezranoam 4 жыл бұрын

Hi professor Ben Yaakov and thanks for another great video. Can you please elaborate on the benefits of constant on time control compare to other controll schemes other than a simpler control system. When would this control system will be more attractive? What performance (efficiency, transient speed etc..) would this method have compare to other controll methods? Thanks for another great video, Noam

@sambenyaakov 4 жыл бұрын

Hi Noam, Thanks for comments from which I learned that I have met my objective of this video: arising interest and curiosity in subject😊. Considering the fact that retention time of videos is short (up to now for this video: Audience retention Since uploaded (lifetime) 5:44 (25.9%) Average view duration) long videos are not effective (for most viewers). I may have a follow up on this subject keeping in mind your wish list

@ezranoam 4 жыл бұрын

@@sambenyaakov yes I am intrigued! Thanks for the comment and for placing my request in the pile.

@sambenyaakov 4 жыл бұрын

Hi, Just posed your questions at www.linkedin.com/feed/update/urn:li:activity:6672198007666028545

@hasnainjahanzaibrajput9805 Жыл бұрын

Hello Professor, I would like to ask that how the min. Off time is set since we have COT so our frequency will not be fixed. Lets just say rhe converter reached the steady state and our frequency is 1 MHz. How do we set this min. Off time and in one of the picture that you have shown in the video there is a block of minimum off timer. How do we make it? Thanks

@sambenyaakov Жыл бұрын

A timer

@christonfredrick Ай бұрын

at 3:11, why is there a drop in the Vout when there is step increase in I?

@sambenyaakov Ай бұрын

Due to the feedback loop BW limit and iductor's limited current slew rate

@dimitarnikolov3527 4 жыл бұрын

Thanks, for the great video! I am wondering, is it's possible remove the output ripple with a capacitance multiplier after the feedback?

@sambenyaakov 4 жыл бұрын

Thanks for comment. Not sure I understand what you mean. If auxiliary ciruit is used, no need for ripple on output.

@SanjayPatil-ju7ch 3 жыл бұрын

Hello Prof Ben-Yaakov, Thanks for an excellent video !! Question - In Constant On-Time architecture, will high/low side switching frequency be a function (linear) of output current IX after transient settle?

@sambenyaakov 3 жыл бұрын

Not of current. Depending on type of controller, it might be a function of voltage transfer ratio.

@SanjayPatil-ju7ch 3 жыл бұрын

@@sambenyaakov Thanks Question - Then what really changes in a controller to supply a larger current after transients have subsided say from 5 amp DC to 20 amp DC? Since on-time pulse width is always constant, I thought the number of high pulses (switching freq or off time) must be the only way to supply increased current demand.

@sambenyaakov 3 жыл бұрын

@@SanjayPatil-ju7ch See kzfaq.info/get/bejne/j9eIaq14qJ3YioU.html