Never heard of this channel, but saw a middle-aged man with a mustache in front of some oscilloscopes and power supplies and immediately knew, i will get exactly the detailed information I was looking for :D
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!
@@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...
This is a deep down technical level in deep detail. He certainly knows his subject and this is what i am looking for. All the other one are general consumer grade scratches the surface. 99.99% of consumers do not care or know about something they use every day use and charge their cell phone. That means wrong purchase for the wrong purpose and wasteful. No wonder Walmart shelves have ton of these confusing cables, usb adapters. Knowledge is power!!!!!
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!
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.
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.
I m a mobile fixing technician and i know about it but u gave me a practical explanation that’s sp great i immediately subscribed ur channel i appreciate ur detailed explanation
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.
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
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)
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.
So RichTek is the producer of MediaTek's Power Express (PE) charging technology ? Can we use a standard USB-PD 3.0 charger for phones requiring the PE protocol ? Where can we purchase RichTek USB-C chargers ?
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!
Now Charging speeds have reached 240W so please update this video with latest stats & future tech. PPS type charging tech should be the Common standard in all Smartphones.
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.
this is a really good video for how something works. I had no idea that cables, adapters and charging devices talk to each other! I always bought good adapters, but never cables! I think i need to see which cables to throw away now!
A question about direct charge/2 with capacitors: If the capa is charged with a constant voltage the charge efficiency should be only 50% (RC model with R internal PCB path + MOS resistance → even when the steps are slight it's the same as long as there are voltage steps), same when the capa energy is released to the battery at a slightly lower voltage than Vcc/2. The overall charge/discharge efficiency should be 25% but I know it's close to 100% → how it works? Capacitors are charged at constant current from the supply until the selected voltage is reached? (well why not), but how to discharge capacitors' energy at CC to the battery without any regulated buck converter?
Here's my layman speculation. "If the capa is charged with a constant voltage the charge efficiency should be only 50%". I fail to fully comrehend this diagram (15:21), but my understanding is that it works in two modes: Mode1: capasitors are connected to charger in series. Thus, they get each half the voltage. Mode2: capacitors are connected to the battery in parallel. This time they in totall output double current. So, we have two modes that are switched really fast. We are talking about kiloherz, maybe even hundreds. Essentialy we get alternating current (or swithching is the right word?). And what you do to limit alternating inrush current? Add some inductance! A tiny inductor will provide needed reactance that will limit currents. Reactance, when dealt in the right way, does not produce power losses. The main point of heating in this divider are switches themselves. They are vulnerable in the moment of switching: when their resistance is neither infinity (closed), nor zero (open). In this moment you need that inductance the most.
I suppose when the voltages are very close together, the switching loss will be very small. Let's say you have a 10 volt source and 9 volt sink. You transfer charge from the 10 to 9 volt level. Only 1 volt is "lost in translation" and 9 volts are transferred. Currents are equal. So 90% efficient.
@@pizzablender What you are describing is true, but it is true only for direct, constant currents. And it has nothing to do with capacitors, as they do not pass constant current. They are used to smooth variations in constant voltage. They can not change input constant voltage, they make it even more constant. As for simple constant currents, your conclusions look right.
@@DimaZheludko Think about capacitors as rechargeable batteries. Charge them in parallel. Then connect in series and discharge. The efficiency can be quite good.
@@pizzablender You are right in that regard. Only it's vice versa. Here, capacitors are charged in series and discharged in parallel. That's what I described in my first answer. The problem is in differences between a battery and a capacitor (especially the size you would find in mobile phone). Battery has some substantial resistance, so if you give it, say 200 mV more than it's voltage, it will charge. Capacitor resistance is bacically zero, so any voltage difference will give you high currents. These currents would produce resistive heating in other parts of circuits, hence the original question by *Incroyables Expériences* That's where the inefficiency comes from: if you connect a source of constant voltage to a capacitor, it will produce a currents that are limited only by the circuit itself. But that makes the circuit a resistive element, thus decreasing efficiency.
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.
I am interrested in the different charging standards of Phones. How does VOOC/WarpCharge by Oppo and Oneplus differ from other solitions. What is with the different pins in the connectors? I would like to make my own Type-A to Type-C cable, that also supports VOOC charge.
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.
Never heard of this channel, but saw a middle-aged man with a mustache in front of some oscilloscopes and power supplies and immediately knew, i will get exactly the detailed information I was looking for :D
Same 😂
okay. where is the button to donate? It IS a crime to not support such quality videos!
I don't normally comment on videos, but this one deserves more than a thumbs up. Well done sir!
For a Richtek advertorial it's ok i guess...
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!
I don't normally comment on comments, but here's my comment. Well done to you yourself sir!
@@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...
@@janiesablan9743 Hahahah :)
This is a deep down technical level in deep detail. He certainly knows his subject and this is what i am looking for. All the other one are general consumer grade scratches the surface. 99.99% of consumers do not care or know about something they use every day use and charge their cell phone. That means wrong purchase for the wrong purpose and wasteful. No wonder Walmart shelves have ton of these confusing cables, usb adapters. Knowledge is power!!!!!
I never thought that charging could be so complex. Thank you for the great video.
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!
@Jyothi Sithara No problem, the phone will select the correct voltage and current
Wonderful explanation with great equipment use. Awesome.
Way more than I bargained for.
This is extremely good information. Keep it up!
All is said and done, great video!
just what i needed to know. everything about charging. impressive video
Best video for battery charging ever!
This is the gold standard of the "how does X work".
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.
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.
So informative 😍 Thanks a lot.
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!
I m a mobile fixing technician and i know about it but u gave me a practical explanation that’s sp great i immediately subscribed ur channel i appreciate ur detailed explanation
This is a brilliant video I never knew there was so much that went into charging a device. Fascinating stuff.
Right? Insane.
All thanks to the engineers who designed it
Excellent, informative video. Thanks.
ภุ
Incredibly well done video. Great organization, instrument use, and pacing. Amazing!
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.
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
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)
@@iggysixx I think he's Dutch as well. I am not Dutch myself and I quickly notice a Dutch accent. :)
REally indepth video, really good
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.
Got my subscribe bro perfectly explained 👊🏾
Amazing! Now I knew at least a little bit about how complicated is battery charging in present day smartphones! Thank you sir!
That's the best video I have watched on power delivery. Everything is detailed and even non engineers can understand the concept
Thanks! Great explanation and examples of how the modern USB charging systems works.
So RichTek is the producer of MediaTek's Power Express (PE) charging technology ? Can we use a standard USB-PD 3.0 charger for phones requiring the PE protocol ? Where can we purchase RichTek USB-C chargers ?
Thank you for this well done tutorial!
I appreciate the level of detail you covered.
Excellent video, really eye opening, thanks
It was a superb explanation sir. Thank you.
Thank you for the information. Excellent lecture, congratulations on the content. 🎉
Amazing video. Well explained. Gained a subscriber.
Sir your engineering knowledge is awesome !!! 👍👍👍👍
Incredible demonstration. It's not so easy to find good explanations (and even documentation) on this topic
What can I say, absolutely brilliant video with in depth information. Thanks for your massive contribution to TH-cam.
this is gold! thanks. looking to read more from your resources :)
Thank you for the great video.Well done .
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!
Thanks for this video! It gives a lot of understanding how it works!!!
Thank you, excellent description and well needed !
One of the best videos out there.
Now Charging speeds have reached 240W so please update this video with latest stats & future tech. PPS type charging tech should be the Common standard in all Smartphones.
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.
Wonderful explanation with ckt concept and port role negotiation, scope signals, this video deserves more than a thumbs up!!
please explain 120 watt Realme phone systems
this is a really good video for how something works. I had no idea that cables, adapters and charging devices talk to each other! I always bought good adapters, but never cables! I think i need to see which cables to throw away now!
Super informative , nicely explained and great stuff, dis video deserves a thumbs up 👍
Wonderful explanation.
Great explanation! Thank you. ❤
This is pure gold. Timeless video, thank you
This is one of the best videos I have ever watched in this field.
Outstanding explanation😮😮😮
This is exactly the info I was looking for, and the presentation was fantastic! Thanks a lot.
Thank you for the beautiful explanation and demonstration!
This is the gold standard on TH-cam
This is so informative and in depth. Thanks for sharing!
Very informative👍👍👍👍👍
This video is EPIC. Easy to understand! Thanks!
A question about direct charge/2 with capacitors:
If the capa is charged with a constant voltage the charge efficiency should be only 50% (RC model with R internal PCB path + MOS resistance → even when the steps are slight it's the same as long as there are voltage steps), same when the capa energy is released to the battery at a slightly lower voltage than Vcc/2. The overall charge/discharge efficiency should be 25% but I know it's close to 100% → how it works? Capacitors are charged at constant current from the supply until the selected voltage is reached? (well why not), but how to discharge capacitors' energy at CC to the battery without any regulated buck converter?
Here's my layman speculation.
"If the capa is charged with a constant voltage the charge efficiency should be only 50%". I fail to fully comrehend this diagram (15:21), but my understanding is that it works in two modes:
Mode1: capasitors are connected to charger in series. Thus, they get each half the voltage.
Mode2: capacitors are connected to the battery in parallel. This time they in totall output double current.
So, we have two modes that are switched really fast. We are talking about kiloherz, maybe even hundreds. Essentialy we get alternating current (or swithching is the right word?). And what you do to limit alternating inrush current? Add some inductance! A tiny inductor will provide needed reactance that will limit currents. Reactance, when dealt in the right way, does not produce power losses.
The main point of heating in this divider are switches themselves. They are vulnerable in the moment of switching: when their resistance is neither infinity (closed), nor zero (open). In this moment you need that inductance the most.
I suppose when the voltages are very close together, the switching loss will be very small.
Let's say you have a 10 volt source and 9 volt sink. You transfer charge from the 10 to 9 volt level. Only 1 volt is "lost in translation" and 9 volts are transferred. Currents are equal. So 90% efficient.
@@pizzablender What you are describing is true, but it is true only for direct, constant currents. And it has nothing to do with capacitors, as they do not pass constant current. They are used to smooth variations in constant voltage. They can not change input constant voltage, they make it even more constant.
As for simple constant currents, your conclusions look right.
@@DimaZheludko Think about capacitors as rechargeable batteries. Charge them in parallel. Then connect in series and discharge. The efficiency can be quite good.
@@pizzablender You are right in that regard. Only it's vice versa. Here, capacitors are charged in series and discharged in parallel. That's what I described in my first answer.
The problem is in differences between a battery and a capacitor (especially the size you would find in mobile phone). Battery has some substantial resistance, so if you give it, say 200 mV more than it's voltage, it will charge. Capacitor resistance is bacically zero, so any voltage difference will give you high currents. These currents would produce resistive heating in other parts of circuits, hence the original question by *Incroyables Expériences*
That's where the inefficiency comes from: if you connect a source of constant voltage to a capacitor, it will produce a currents that are limited only by the circuit itself. But that makes the circuit a resistive element, thus decreasing efficiency.
That's what I am looking for, thanks a million for the great video.
Thank you Sir for a deep detailed explanation about the complicated FAST CHARGING protocols.
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.
This video was done really well. Thanks :)
This video is an eye-opener. so clean and clear. thank you so much!
indeed a great knowledge to share with details and complete comprehensive visuals ... kudos!
This is gold! thank you very much for all the information and analysis!
Great Info , and superb explanation
Great video! I am glad that it appeared in my recomendations!
Thank you sir!
I am interrested in the different charging standards of Phones. How does VOOC/WarpCharge by Oppo and Oneplus differ from other solitions. What is with the different pins in the connectors? I would like to make my own Type-A to Type-C cable, that also supports VOOC charge.
Clear and concise. Thank you very much
8:49 here you go
This is great man. Serious quality info here.
Thank you so much!!!
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.
insanely educational! Thanks!
Thank you for all the explanations, it was super interesting I learned a lot!!!
Wonderful. I will rewatch this video to get better understanding. Thank you!
Excellent explanation and demonstration
Finally I can implement usb-c PD on my projects. Great video explanation.
Same same. I normally don't comment much at all.
But this video is brilliant!
I appreciate that !
Well done!
A very detailed explanation!
Video is easy to understand
Thanks you
Very very detailed video 🔥
thanks for the awesome explaination
Amazing work ❤️
Richtek, you produce damn good products. Unfortunately your products unavailable on retailers around me.
This is extremely well explained! Thank you! :D
Very informative thank you sir
please update 240 watt phone charging systems
Saludos. Excelente video. Muchas gracias .
U r genius sir 🙏🙏🙏🙏
Thanks for the info 👍👍
Thank you sir for your excellent explaination with demonstration
this video is very valueable & informative.
well explained. thamk you sir
A realy great job! Thank you!
best explanation until now
it goes to really complicated started at 16:30 Mind blowing