How does mobile phone fast charging work?

Рет қаралды 353,941

Күн бұрын

This video explains the technology behind fast charging in mobile phones, from early phones with linear chargers to the most advanced high power Direct-Charge-Divide/2 systems. We discuss different battery types, special charging systems like Qualcomm’s Quick-Charge QC2.0/3.0 and the new USB-C Power Delivery charging systems, covering Direct Charge and Direct Charge-Divide/2 systems that can deliver charging powers up to 45W without overheating.
We hook up oscilloscope and USB-PD analysers to different smartphones like Galaxy Note 10+ to examine their charging behaviour in detail. We will also tell you about next generation smartphone charging technology like Direct Charge-Divide/4 and dual cell battery systems.
Read more about Richtek’s ‘’Fast charging and USB PD’’ :
www.richtek.com/technology/fa...
Related Richtek products:
RT9467: 5A Switching charger (high current switching charger application)
www.richtek.com/RedirectToPro...
RT1716: USB-PD 3.0 Power delivery controller (sink side)
www.richtek.com/RedirectToPro...
RT9471: 3A Switching charger (medium current switching charger application)
www.richtek.com/RedirectToPro...
Some handy measurement tools that were used in this video: RIDEN TC66 and XYZ studio ZY1271 USB power monitors; Total Phase USB-PD protocol analyser.
music "The Stratosphere" by Adam Vitovsky

Пікірлер: 328

@ewicky 3 жыл бұрын

I don't normally comment on videos, but this one deserves more than a thumbs up. Well done sir!

@ChristopheVerdonck 3 жыл бұрын

For a Richtek advertorial it's ok i guess...

@johnnyleonidas6639 2 жыл бұрын

I dont mean to be offtopic but does someone know a way to get back into an Instagram account? I somehow forgot the password. I love any tips you can give me!

@janiesablan9743 2 жыл бұрын

I don't normally comment on comments, but here's my comment. Well done to you yourself sir!

@janiesablan9743 2 жыл бұрын

@@johnnyleonidas6639 try commenting on an Instagram post perhaps. I've tried asking an off topic question on a church vigil video about beastiality...let's say it wasn't my best idea...

@itsaustraliadayeveryday7234 Жыл бұрын

@@janiesablan9743 Hahahah :)

@two_number_nines 3 жыл бұрын

This is the gold standard of the "how does X work".

@Infection3d 3 жыл бұрын

Way more than I bargained for. This is extremely good information. Keep it up!

@Maximus-tq8ny 3 жыл бұрын

This was absolutely fantastic! I've seen so many "tip-of-the-iceberg" videos on things like USB-C PD but this goes into much more detail. Everything is explained in a way that makes sense. Nonetheless, I'll probably have to watch this one a few more times to catch all of the information that was packed in. You have earned yourself a sub, Sir!

@DSCKottawa 3 жыл бұрын

@Jyothi Sithara No problem, the phone will select the correct voltage and current

@Boz1211111 3 жыл бұрын

just what i needed to know. everything about charging. impressive video

@Imrooot Ай бұрын

I never thought that charging could be so complex. Thank you for the great video.

@IncroyablesExperiences 3 жыл бұрын

All is said and done, great video!

@bharatshetty9560 3 жыл бұрын

Amazing!!! Many thanks for sharing all the different types of chargers, their specs and the internal design. Being an electronics engineer myself I found it more than enlightening, can't thank you more for painstakingly putting up the graphics in such a lovely way and make it look as simple as it did. Best wishes for your future presentations.

@engineerkohat 3 жыл бұрын

Wonderful explanation with great equipment use. Awesome.

@peterruppert7856 2 жыл бұрын

Way more info than I bargained for but I'm thankful for it! Awesome video! I had no idea these phone charging systems were so intuitive!

@jasonmiller5956 3 жыл бұрын

Incredibly well done video. Great organization, instrument use, and pacing. Amazing!

@zaki4t 2 жыл бұрын

If I spend months searching for such quality content for free I’ll simply get to nowhere. Thank you very much for the brilliant & clean effort you have kindly shared with us, respect.

@varunadesilva2930 3 жыл бұрын

What can I say, absolutely brilliant video with in depth information. Thanks for your massive contribution to KZfaq.

@Jobobaboss Жыл бұрын

Wow. This was such a pleasure to watch. Great learning course! I think I might need to watch this one twice to really remember all of the different circuits. Very clear and very understandable. Thank you so much Roland!

@EdwinSteiner 2 ай бұрын

This video is excellent. It is the first video I've seen on this confusing topic that actually explained things. Showing the circuits in action is an additional plus.

@tabaghdissar 3 жыл бұрын

That's the best video I have watched on power delivery. Everything is detailed and even non engineers can understand the concept

@andrewlindh5047 3 жыл бұрын

Thanks! Great explanation and examples of how the modern USB charging systems works.

@MalayalamTechOfficial 3 жыл бұрын

So informative 😍 Thanks a lot.

@arjunb5941 3 жыл бұрын

Wonderful explanation with ckt concept and port role negotiation, scope signals, this video deserves more than a thumbs up!!

@CCAPACCO 3 жыл бұрын

this is gold! thanks. looking to read more from your resources :)

@tj9382 3 жыл бұрын

This is a brilliant video I never knew there was so much that went into charging a device. Fascinating stuff.

@sensiblewheels 3 жыл бұрын

Right? Insane.

@alice_in_wonderland42 2 жыл бұрын

All thanks to the engineers who designed it

@iggysixx 3 жыл бұрын

This is the most in-depth, easy to understand, high quality video on charging that I've ever come across. I love that you are able to explain so comprehensively, while not diving into technical terms (even with the circuit diagrams, and the oscilloscope). That is the sign of true understanding and expertise. Also, thank you for explaining the differences between 'old' charging methods and the new ones, without skipping explenation of the old. I like to repair things, but that could be anything from power tools,.to a variety of smartphones, to old cellular phones. So the gap in my understanding of the differences in charging vs battery chemistry is only becoming more and more apparent as technology develops.. I found an oscilloscope a while back (in the trash - it works fine. From the late 70s I think). I have been meaning to use it to dig into electronics a bit more. Your video really shows the value of it, and I am freshly motivated to start digging in

@iggysixx 3 жыл бұрын

On an unrelated note; Are you originally Dutch? (I think I hear the faint remnants of an accent at some points when you speak - your English is impeccable*, though :) * I suspect most Dutch people will not even notice what I am talking about)

@diavalus 3 жыл бұрын

@@iggysixx I think he's Dutch as well. I am not Dutch myself and I quickly notice a Dutch accent. :)

@supercurioTube Жыл бұрын

This is exactly the info I was looking for, and the presentation was fantastic! Thanks a lot.

@sadamratrout2251 24 күн бұрын

This is one of the best videos I have ever watched in this field.

@akankshaupadhayay2352 3 жыл бұрын

Super informative , nicely explained and great stuff, dis video deserves a thumbs up 👍

@birdwatcher899 3 жыл бұрын

Great video! I am glad that it appeared in my recomendations! Thank you sir!

@pavanah9823 3 жыл бұрын

It was a superb explanation sir. Thank you.

@Delali 3 жыл бұрын

You have no idea how much value i've gotten from this video. Keep up the great work I'm working on a QC charger for my channel so yh, this video has been really helpful.

@orkin.itadmina2072 3 жыл бұрын

indeed a great knowledge to share with details and complete comprehensive visuals ... kudos!

@Saschabrix 3 жыл бұрын

Thank you for all the explanations, it was super interesting I learned a lot!!!

@rfpixel 3 жыл бұрын

This is gold! thank you very much for all the information and analysis!

@aquual1462 3 жыл бұрын

REally indepth video, really good

@Patrick-nv3xd 4 жыл бұрын

Excellent, informative video. Thanks.

@khamsingphengsimsavath9785 3 жыл бұрын

ภุ

@AlvinAlsace 2 жыл бұрын

This is pure gold. Timeless video, thank you

@JSuparman 3 жыл бұрын

Thank you Sir for a deep detailed explanation about the complicated FAST CHARGING protocols.

@zetasyanthis 3 жыл бұрын

This is extremely well explained! Thank you! :D

@HimanshuDewruwanHapuarachchi 2 жыл бұрын

This video is an eye-opener. so clean and clear. thank you so much!

@Lam-s-Workshop 3 жыл бұрын

Clear and concise. Thank you very much

@Mark1Mach2 3 жыл бұрын

Wonderful. I will rewatch this video to get better understanding. Thank you!

@ruben34 3 ай бұрын

Finally I can implement usb-c PD on my projects. Great video explanation.

@packratswhatif.3990 Жыл бұрын

Thank you, excellent description and well needed !

@wirdy1 3 жыл бұрын

Thank you. Very clearly explained. Very few users know how their phones charge, but for the techies this kind of info is useful to know which chargers / cables combinations work best.

@chideraakpa1424 Жыл бұрын

This is so informative and in depth. Thanks for sharing!

@phonerepairteam4289 3 жыл бұрын

We service mobile phones professionally and your video has helped us a lot to detect problems and malfunctions associated with charging on modern smartphones. Thank you very much for such a detailed explanation and we look forward to new content.

@vimicito 3 жыл бұрын

This was incredibly interesting to watch. On an iPhone I noticed very odd charging behavior that I hadn't seen on Android phones before. This video taught me everything about it that I needed to know and more, thank you!

@esmailalkassir1565 Жыл бұрын

What is it ?

@AshuariaLee 2 жыл бұрын

This video is EPIC. Easy to understand! Thanks!

@Iam2lazy2register 3 жыл бұрын

insanely educational! Thanks!

3 жыл бұрын

More info about charging the phone to 80 or 90% on affecting battery life... So much knowledge in this video! Thanks!

@archer9056 Жыл бұрын

Single detailed video on KZfaq about phone charging..❤

@tannisthadutta9284 Жыл бұрын

Thank you for the beautiful explanation and demonstration!

@mikeunivers 3 жыл бұрын

best explanation until now

@bvesunsun2324 3 жыл бұрын

Best video to explain about mobile phone battery charging. I hope that I could watch this video earlier.

@MatthewWalker0 3 жыл бұрын

That RT9759 is insane... "capacitive divider" is not exactly what I'd expect it to be called (no AC signals here). Found the spec sheet, got some clues, and it's more of a double charge-pump that actually uses the battery as a voltage source! Just considering the top half, it first configures the mosfets to use the battery plus the VBUS (which, recall, is externally maintained at twice the battery voltage) to charge the capacitor to VBUS/2==V_battery, then the mosfets are reconfigured to discharge the capacitor into the battery, and repeat. The bottom half is just a duplicate used presumably to ensure smooth operation.

@CKSChurch 3 жыл бұрын

This is great man. Serious quality info here.

@meshackkorir801 3 жыл бұрын

I didn't know the communication thing btwn charger and phone...so I now know the problem with using two way cable...thanks sir.

@soumitratewari483 3 жыл бұрын

Sir your engineering knowledge is awesome !!! 👍👍👍👍

@sensiblewheels 3 жыл бұрын

Omg 23:21 I've been trying to understand how my One Plus 8T charges, with it having 2 batteries and the charger max output being 65W! I'm so happy I found a solution here. Wonderful deep dive!

@mynamemylastname2533 3 жыл бұрын

Thank you...Very impormative

@alexwang007 3 жыл бұрын

The direct charge topology is so smart. By using the bettery current as feedback and directly controlling the flyback duty cycle, completing the feedback loop (probably a PI controller). Such high effciency.

@bwigmytch 27 күн бұрын

well explained. thamk you sir

@quantang6331 5 ай бұрын

Best video for battery charging ever!

@km0999 3 жыл бұрын

Same same. I normally don't comment much at all. But this video is brilliant! I appreciate that ! Well done!

@iblesbosuok 3 жыл бұрын

Richtek, you produce damn good products. Unfortunately your products unavailable on retailers around me.

@affinitystablepeanuts 3 жыл бұрын

Interesting and easy to follow along. Thank you.

@shiv1499 Жыл бұрын

This video was done really well. Thanks :)

@Orion_Prime 3 жыл бұрын

Very very detailed video 🔥

@basilmathew9762 3 жыл бұрын

Well described:) looking forward to work with your solutions .

@SogaFuchiki 3 жыл бұрын

Video is easy to understand Thanks you

@najithn 3 жыл бұрын

Great Info , and superb explanation

@onlyhuman5 3 жыл бұрын

Very informative. Thank you.

@mr.reapir 2 жыл бұрын

Your explanation was very well understood Thank you so much for solving many of my confusing issues in this lecture May you have the strength and courage to continue this successful video Thank you again

@whitbyretreat145 2 жыл бұрын

The details in this video is mindblowing

@Automonium 3 жыл бұрын

Well done and very informative. 👍

@johnkg702 3 жыл бұрын

Very informative thank you sir

@1234456devcdeve 2 жыл бұрын

Haven't watched but wanted to comment first after reviewing the intro and reading the comments. This will indeed be the video on battery.

@jjarven 3 жыл бұрын

Enlightening video. Seems the charging is a world of it's own.

@LitBanks Күн бұрын

A very detailed explanation!

@oefzdegoeggl Жыл бұрын

Extremely good video about the topic. If I was a circuit designer for power adapters, I'd use the Richtek chips now 😄

@pinkputotoy 3 жыл бұрын

Very informative👍👍👍👍👍

@wirtdonners4212 3 жыл бұрын

Great video! Thank you very much!

@leonsinitram 3 жыл бұрын

Thank you so much!!!

@iranmxmelo4776 3 жыл бұрын

A realy great job! Thank you!

@ArifKamaruzaman 3 жыл бұрын

Whoaa this is fascinating to watch. I never know how my phone charge so fast. Now I know how complex the charging system is.

@gorursuresh4246 3 жыл бұрын

Informative,thanks for sharing

@RuviaPawz 3 жыл бұрын

This is the gold standard on KZfaq

@pathumprabath8450 2 жыл бұрын

Great video. Thanks 😊

@emilsbstn 3 жыл бұрын

Thanks for sharing this valuable information ❤️

@stevenbliss989 6 ай бұрын

Great overview, thank you! :)

@iotsolutionslk 2 жыл бұрын

I don't normally comment on videos. But this deserves a like comment and subscribe. Wow Wow Wow. This is how you create a how is works video. Simple + Complex + Techie + Theory + Practical. The presentation at it's best. Other youtubers please learn from this guy.