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...
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
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.
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.
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.
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.
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!!!!!
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 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 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)
USB Charging is incredibly frustrating, it's practically a matter of trial and error hoping you can get a combination of device, cable and charging port that delivers optimal charging speed. I've lost count of how many times I have gone to charge a device and had it slowly discharge instead because something in the chain isn't correct. Thank you for this video though, it really helps demystify what's going on behind the scenes!
Know the problem... The market is flooded with cables made with a standard USB connector (the type you find on a mouse) at one side, and USB-C at the other side. This cable will not deliver anything above 5 Volt, 2 Amp charging in PD mode. It can deliver Qualcomm QC 2.0 and 3.0 modes, tough. So it is very important to know if the phone uses QC or PD quick charges mode. PD modes require usually a USB-C to USB-C cable. Some brands (like Huawei) use a proprietary charge mode, which basically are like the Qualcomm QC with a modified signalling, so they don't have to pay royalties to anybody. PD mode is not proprietary, it is a standard endorsed by USB Forum, but it is expensive; so we don't see PD in low range phones, and some partial implementation in midrange phones. This may change in the future if all phones will have a 5000+ mAh battery. Personally, I prefer QC over PD because it keeps the current low into the connectors. With a 5 Amp PD, the connectors must be very clean and tight. The problems increase with the square of the current. Thanks for the video...
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.
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!
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.
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.
I say there's a lot to take in it would have been better if the circuits were coupled up with actual phones not just schematics. All in all its the greatest video on mobile charging.
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.
Wow. I had no idea the charger was so involved for modern battery charging. I thought it just switched to 9V and the phone did the rest. Times have changed.
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 ?
I... dont expect this kind of explanation. My brain just overloaded... Anyway.... thanks. It really changes my point of view about mobilephone charger.
Worked at a certification lab a few yrs. Every thing amd any thing, using ocyliscops for safety regulations. Intelegent people to be around such as yourself!
Super informative , nicely explained and great stuff, dis video deserves a thumbs up 👍
3 года назад
I never charged my phone with a quick charge. Instead of the original fast charger I use a regular slow charger, so instead of 4A, I charge with 1.4A. After more than three years, the battery works for me as it did on the first day. P.S I stop charging to about 70%. (at 4.1V) Li ion batteries do not withstand the charge to the end. Proper charging of li ion batteries is up to a maximum of 4.2V and this guarantees 500 cycles. Anything above that drastically reduces the number of battery cycles and therefore the batteries have a short lifespan. Charging the battery with 4.4V (battery voltage) and at almost 40 Celsius cause drastically battery wear.
Thank you for doing your part to part to protect the environment. I flash my phone with Rom that allow me to limit the battery to 80 percent capacity and the last much longer.
3 года назад
@@anuarbin There is also great application for android. It's called "AccuBattery" but this app doesn't turn off the battery. Just reminder-alarm and a lot of different information about the battery in the phone.
Actually saturation mode is mandatory, it starts after 4.2 is reached. 500 Cycles is very little and it only destroys like 30% of capacity. There is no such thing as 4 amps on the usb, 5 amps is only available on PC.
3 года назад
@@lolerie What are you talking? How do you think there is no 4 and 5A charging via USB? These are specific chargers for fast charging and all new phones in the higher class have them. My 3.5 year old oneplus 5T has such a charger.
09:25 USB-C PD with 20 V and 5 A maximum capacity that delivers 100 Watts energy. How do we have even 240 Watts fast charging nowadays with USB-C cable? Crazy
Thanks this is what I was looking for , a real explanation. Good stuff The first RU-vid video I searched on “ how does fast charging works the guy said , it works because you have to buy a fast charger “no dah Sherlock” 🤣🤣🤣🤣🤣🤣
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.
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
