How to measure Buck converter loop gain and phase

[@VovinAtreides]

Thank you for this very informative video! Do you think the 8 bit picoscopes will give usable results?

[@richtek]

Yes, we also used PicoScope 2208B: it gives usable results, but the noise level is higher, so with low stimulus settings the graph also shows more noise in the low frequency range. See the measurement results on www.picotech.com/support/topic14311-270.html#p122181

[@Parirash123]

This video must be categorised under "Hidden Gems of KZbin" 💎

[@luiscarlosmarques3946]

❤ Sure !

[@stal6317]

As a 30 year designer, this video demonstrstes the very good experience of the presenter.

[@adaminsanoff]

Great explanation and no need for multi thousand dollars equipment! Thank you sir!

[@krishnak2234]

Crystal clear explanation.. gives clarity to the viewers. Great job sir.

[@levinhphuduc]

This video is useful. Thank you very much!

[@naveenreddy1010]

Brilliant Lecture of FRA of Buck Converter. Seems this is the type 2 compensator.

[@labirue]

It is briliant tutorial like previous about fast prototyping! Thank you master :) for linking theory with practice. This video puths TI's simmilar one on the knees. Great job!

[@dattran0000]

Thank you so much for the useful video. Could you make another tutorial video to show how to measure non-opto Flyback converter loop gain and phase ?

[@bigrob4781]

Roland, that was a great video!

[@xyong8925]

Very helpful! Thanks! From China.

[@AdamParker915]

Great job! Thanks for sharing knowledge!

[@luiscarlosmarques3946]

Este video é uma joia perdida do youtube ! Gratidão

[@frankwalsh1379]

Incredible video. Thank you so much!

[@sc0or]

Drawn like this (on the preview) it looks like a typical D-class amplifier. And I think all the best technics of making a modulator (purifi, ncore, ice) will work perfectly in case of a buck converter as well

[@alibargh]

Great Video! Thank you for sharing!

[@tony97360346]

It’s a very fabulous video

[@Telectronics]

Very informative video ! I have a question could we place the injection resistor with the transformer also inside the voltage divider in case we want to measure very high voltages ? On TOP it´s very hard to protect the measurement equipment from high voltages. I would also place the oscilloscope probe within the voltage divider If that´s possible.

[@stephanc7192]

Amazing knowledge!

[@AdamParker915]

Instead of a magnetic transformer (balun) to inject the signal, caný a differential output amplifier (LMH5401IRMST) be used? Does it make sense to use a kind of calibration (modifying the software) to compensate transformer losses by modifying the generator amplitude?

[@mtrltoolman]

Hi, I have a buck converter based on IC# lm25116 how to connect an indicator led light or buzzer to the ic to know it is in the hiccup mode .

[@happyhippr]

Yo this video is the bee's knees... Reealy really so great

[@myil7514]

Hi Richtek, I would like to obtain an open-loop bode plot of a boost converter. But, I don't know where to place the injection transformer and measurement points for the scope. Can you please help me with that? Greetings & Thanks

[@wl9052]

can you explain why the insulating cap improves the noise problem?

[@deepakdavid8355]

Yes, please explain about it

[@johntryl8009]

Noob question, but at 1:41, the Vout is said to drop when a load is added, but I thought that didn't happen in parallel circuits? In series, there will be drops across components, but adding a load in parallel should not drop the voltage, it should only affect the current through the Vout node? No?

[@林進木]

Is this type III compensator?

[@02585975]

Why can’t we just break the loop and measure the loop gain and phase that way??

[@lytomely5596]

墙裂建议增加中文字幕

[@richtek]

我們有製作中文字幕，請您打開 youtube 字幕，或至優酷頻道觀看：v.youku.com/v_show/id_XMzQ5ODkxODY4NA==.html

[@binxu2674]

@@richtek 非常好的环路介绍视频。 希望可以分享到BILIBILI.

[@sadiquebasha4995]

Hello, Genius, I'm getting a big doubt about LCD/LED TV's COF IC. I'm not getting any idea about this, because, I don't have a Microscope or DSO. If you are interested to help, please take a small test about this COF with IC & without IC. Everybody knows all signals coming from the T-CON board to the LCD panel with the help of the COF bonding method and its signal testing points also given in this COF. But, why need this COF and what is the role of this IC? This IC's data is hidden or this is not an IC. Please clarify the truth about this COF.🤔