Yes they are complex especially the fast chargers as they have to do extensive monitoring and 2 way communication with the phone through the coupled transformer. Lithium batteries are dangerous if not charged correctly. When you plug your phone in this is done by the phone. Wireless it is handled by the Qi charge circuits because wireless charging can produce more heat especially when phone cases are involved. So the monitoring is critical.
@@davey2k12 Qi charging monitors many parameters and does 2 way regulation and communication between device and temperature monitoring. Yes i am aware of it shutting down. There are times when i put my phone on the charge pad at night in the dark and not hit the right spot. This results in poor connectivity the system gets warm and turns off. I wake up to a phone with 20% charge.
You need a soldering iron and a razor blade to remove the cover. You warm up the lid and slide the blade into the soldering point. And so on the perimeter of the lid. This will allow it to be removed without damaging the components inside.
@@martinda7446 At some point i stop caring about fixing something and decide im going to rip it open at all costs. I was waiting for him to get the angle grinder
Nice video of a cat on the phone,,,,is that a Samsung galaxy s9 phone? Interesting to see the inside of a phone wireless charger,,,despite not having any luck in getting it working again as I guess u have destroyed it with the heat gun,,,,melting the solder and fan connection,,capacitors and usb,,,just to get that metal cap off it to reveal the ic circuit parts!
Nice teardown, thanks, the board seems way too complex to be just a wireless charger. It's probably sucking data off the phone and reporting back to it's evil masters or something ominous like that with all the effort they went into to hide the circuits.
Just remember what can happen if you charge a lithium battery wrong. You have a small bomb there and you are sawing logs while that thing is charging next to you. You want all the protection you can get. They don't need to suck the data off your phone. Your phone perfectly capable of doing that for you. It has a camera, and microphone too, so it can watch you and listen in without your knowledge and send all your life to it's maker. Remember where your phone was made. It wasn't always this way. The smartphone was invented in Canada, in Waterloo Ontario by a big company called Research In Motion. That phone was the BlackBerry and it was made in Canada and guarded your privacy like nothing else ever made. It just wasn't sexy like that phone made by a company that rhymes with crapple. Made where? You guess it, China. That's where they are all made today, including BlackBerry. (no they are not dead, a new one is coming next year, built right alongside with iPhone over at foxxcon as the TCL contract with blackberry is done, and now Foxconn is going to make the next model again)
@@12voltvids i liked the days when you kept your real identity private online. Now every bloody site wants your phone, email and real name. So they can track, sell your profile to make advertising revenue. Its disgusting but everyone became ok doing it.
@@ShowMeInHD Here is one for you. The Americans point fingers at China saying that they are spying. Can't allow hauwei into cell network because they spy for the Chinese government. The Americans (NSA FBI CIA) have been doing that for years as have the Canadians (CSIS). Do you really think your electronic communication is private. Oh let's not forget the Russians. They are listening too.
@@12voltvids Before I annoy you I must say that was a fascinating teardown. That was a very well made and sophisticated device! I doubt any viewer would have expected to see heatsinks and fans in that little case... Excellent stuff. I don't think Blackberry would receive even a third place in smartphone history. IBM released the first in 1992 followed by a whole plethora of models from others. I was using a Windows CE based phone at least a couple of years before Blackberry were even a thing. The early Windows phones had more power than any early Iphone too. The innovation was in the touch screen, software and packaging of course and I also had a Blackberry but never thought it was that smart... (I will await your fierce reply...). 🙈🙉🙊
@@martinda7446 the RIM 957 was the first device with full data capability that used the cellular network to communicate. It was not a phone at that time just a monochrome screen handheld that could do email, and send receive documents. That was before they came up with the blackberry name. Go do a bit of research. I am not talking palm pilots or any other offline organizer that may have been around prior to that. I am talking about the first connected device and the blackberry was the first of the true smart phones. Prior to 2000 phones could send text messages and that was about it.
Nice teardown, though I think I would have tried a pair of sharp cutters rather than a heat gun to get that shield off, but I doubt it would have been much easier - this thing is clearly designed to be unserviceable. There seems to be a hell of a lot more in there than would realistically be needed for such a device though. The main chip is a P9242 which is a dedicated wireles charger. This drives two pairs of push-pull MOSFETs which are connected directly to the coil. Just Google "P9242-R datasheet" for the full details on just how clever this chip is, along with a very cool application circuit which is most likely exactly the way it's been implemented here. My guess is that the rest of the gubbins under that shield are to do with the USB-C voltage selection. This seems to be confirmed by the presence of the PD3171 chip which is a USB Power Delivery Controller. Again the datasheet is easy enough to find online. - a straightforward Micro-USB would remove the need for quite a bit of that stuff. Interesting to see the 25X40C 4Mbit SPI flash memory chip in there - presumably that holds the actual system firmware. Definitely seems hugely over-complicated for the job it has to do though...
I knew Qi chargers needed special chips but it looks like this probably has a relatively powerful computer inside because the Winbond chip is a 512 kbyte flash memory chip. I'd guess the unpopulated 4 pin connector next to the fan connection is a 3.3 volt serial port for some sort of console access and maybe the 5 pin is a JTAG connector. It really seems overkill to me, I would've thought an itty-bitty 8 bit chip would be enough for all the power negotiation and user LEDs anyone would need.
Well remember what the unit is doing. Charging a cell phone.... And just why type of batteries are in a cell phone??? Lithium polymer in most cases. And you know what can happen to a lithium polymer battery if not charged correctly right? Where do most people charge their cell phones? On their bes side table while they are sleeping. Even more reason to monitor the shit out of the charging cycle.
nomenclature is important: 1) It's NOT a transformer, it's an inductive coil 2) The ferrite substrate is there to shape the magnetic fields being generated. 3) The temperature sensor is NOT a "sensing coil" it's an NTC thermistor 4) the shielding is there to keep the magnetic field from interfering with the micro-controller signals. it literally has nothing to do with keeping people from looking at the design of the board. at the end of the day, you don't really know what you're doing here do you? I mean, you used what can only be described as a comically oversized heat gun to take off shielding that literally any hot-air station could do quickly, and in the process, you scraped components off the board by not lifting the shielding properly, melted connectors by not protecting them before applying copious amounts of wide-area heat, blistered a capacitor... At the end of the day, lack of knowledge, and lack of skill have eliminated any reasonable chance of diagnosing, or repairing this device. Had you used the proper tools, taken your time, and lifted the shielding properly, it would have been trivial to track down the issue to a failed component. blaming a drop, or a component magically comming off the board, when you yourself scraped componants off means nothing. More than likely what happened to the unit (as is common with these types of units) is one two issues. 1) one of the MLCC's developed a flaw 2) One of the mosfets died (yes, what you called a transistor is actually going to be a mosfet)
She is gone. All grown up and out of the house having her own life. Hopefully not too many more years and there will be grandchildren coming over for a visit! Did i just say that? Starting to feel really old.
I don't know what hell they had you doing at work, but it must of been bad for you to mention it. That r.f charger looks really well made, shame they didn't make it daughter proof lol . I guess the parts were soldered first, then a special hot ring tool heated the outside only.
It was just a big job. I work for a big Telco and we get big jobs. I was working at a customer's home putting in fiber service with home phone, internet, 5 tvs and a full security system that includes home automation (door locks) sensors on windows and doors, motion detectirs, smoke detectors and 3 outdoor cameras. Did I mention it was raining all day too. This should have been a 2 man job but i got it all myself and these jobs take time. Started 8 am, left to go home 9 pm. Not impressed. Got my "lunch" break at 5pm. Was supposed to be done at 630. I actually had to go back the next day and move one of the cameras because the customer has a trailer to park in the driveway that blocked the shot. That would have been nice to know before putting it up and running the wire the first time.
NTC or PTC 🤔 NTC then lol I bet it was nuked with today's type c probably had 20v 4amp thru it lol not to mention the magnets am bit close for comfort design to fail 😃
I never realized there was so much to these chargers. Thanks for the teardown.
Yes they are complex especially the fast chargers as they have to do extensive monitoring and 2 way communication with the phone through the coupled transformer. Lithium batteries are dangerous if not charged correctly. When you plug your phone in this is done by the phone. Wireless it is handled by the Qi charge circuits because wireless charging can produce more heat especially when phone cases are involved. So the monitoring is critical.
Monitoring what the temperature of the coil you recon it communicating temp back to the fone nahhhhhh it just shut off when to hot 🔥😂
@@davey2k12
Qi charging monitors many parameters and does 2 way regulation and communication between device and temperature monitoring. Yes i am aware of it shutting down. There are times when i put my phone on the charge pad at night in the dark and not hit the right spot. This results in poor connectivity the system gets warm and turns off. I wake up to a phone with 20% charge.
You need a soldering iron and a razor blade to remove the cover. You warm up the lid and slide the blade into the soldering point. And so on the perimeter of the lid. This will allow it to be removed without damaging the components inside.
Or a hot air station
Epic battle of Man vs Chinese wireless charger. Man won 🏆
Ha ha...I'm not sure who won...Maybe it was a draw?
@@martinda7446 At some point i stop caring about fixing something and decide im going to rip it open at all costs. I was waiting for him to get the angle grinder
@@ShowMeInHD Hallelujah!
Nice video of a cat on the phone,,,,is that a Samsung galaxy s9 phone?
Interesting to see the inside of a phone wireless charger,,,despite not having any luck in getting it working again as I guess u have destroyed it with the heat gun,,,,melting the solder and fan connection,,capacitors and usb,,,just to get that metal cap off it to reveal the ic circuit parts!
Nice teardown, thanks, the board seems way too complex to be just a wireless charger. It's probably sucking data off the phone and reporting back to it's evil masters or something ominous like that with all the effort they went into to hide the circuits.
Just remember what can happen if you charge a lithium battery wrong. You have a small bomb there and you are sawing logs while that thing is charging next to you. You want all the protection you can get. They don't need to suck the data off your phone. Your phone perfectly capable of doing that for you. It has a camera, and microphone too, so it can watch you and listen in without your knowledge and send all your life to it's maker. Remember where your phone was made. It wasn't always this way. The smartphone was invented in Canada, in Waterloo Ontario by a big company called Research In Motion. That phone was the BlackBerry and it was made in Canada and guarded your privacy like nothing else ever made. It just wasn't sexy like that phone made by a company that rhymes with crapple. Made where? You guess it, China. That's where they are all made today, including BlackBerry. (no they are not dead, a new one is coming next year, built right alongside with iPhone over at foxxcon as the TCL contract with blackberry is done, and now Foxconn is going to make the next model again)
@@12voltvids i liked the days when you kept your real identity private online. Now every bloody site wants your phone, email and real name. So they can track, sell your profile to make advertising revenue. Its disgusting but everyone became ok doing it.
@@ShowMeInHD
Here is one for you. The Americans point fingers at China saying that they are spying. Can't allow hauwei into cell network because they spy for the Chinese government. The Americans (NSA FBI CIA) have been doing that for years as have the Canadians (CSIS). Do you really think your electronic communication is private. Oh let's not forget the Russians. They are listening too.
@@12voltvids Before I annoy you I must say that was a fascinating teardown. That was a very well made and sophisticated device! I doubt any viewer would have expected to see heatsinks and fans in that little case...
Excellent stuff.
I don't think Blackberry would receive even a third place in smartphone history. IBM released the first in 1992 followed by a whole plethora of models from others. I was using a Windows CE based phone at least a couple of years before Blackberry were even a thing. The early Windows phones had more power than any early Iphone too. The innovation was in the touch screen, software and packaging of course and I also had a Blackberry but never thought it was that smart...
(I will await your fierce reply...).
🙈🙉🙊
@@martinda7446 the RIM 957 was the first device with full data capability that used the cellular network to communicate. It was not a phone at that time just a monochrome screen handheld that could do email, and send receive documents. That was before they came up with the blackberry name. Go do a bit of research. I am not talking palm pilots or any other offline organizer that may have been around prior to that. I am talking about the first connected device and the blackberry was the first of the true smart phones. Prior to 2000 phones could send text messages and that was about it.
Nice teardown, though I think I would have tried a pair of sharp cutters rather than a heat gun to get that shield off, but I doubt it would have been much easier - this thing is clearly designed to be unserviceable. There seems to be a hell of a lot more in there than would realistically be needed for such a device though. The main chip is a P9242 which is a dedicated wireles charger. This drives two pairs of push-pull MOSFETs which are connected directly to the coil. Just Google "P9242-R datasheet" for the full details on just how clever this chip is, along with a very cool application circuit which is most likely exactly the way it's been implemented here. My guess is that the rest of the gubbins under that shield are to do with the USB-C voltage selection. This seems to be confirmed by the presence of the PD3171 chip which is a USB Power Delivery Controller. Again the datasheet is easy enough to find online. - a straightforward Micro-USB would remove the need for quite a bit of that stuff. Interesting to see the 25X40C 4Mbit SPI flash memory chip in there - presumably that holds the actual system firmware.
Definitely seems hugely over-complicated for the job it has to do though...
I knew Qi chargers needed special chips but it looks like this probably has a relatively powerful computer inside because the Winbond chip is a 512 kbyte flash memory chip. I'd guess the unpopulated 4 pin connector next to the fan connection is a 3.3 volt serial port for some sort of console access and maybe the 5 pin is a JTAG connector. It really seems overkill to me, I would've thought an itty-bitty 8 bit chip would be enough for all the power negotiation and user LEDs anyone would need.
Well remember what the unit is doing. Charging a cell phone.... And just why type of batteries are in a cell phone??? Lithium polymer in most cases. And you know what can happen to a lithium polymer battery if not charged correctly right? Where do most people charge their cell phones? On their bes side table while they are sleeping. Even more reason to monitor the shit out of the charging cycle.
@Joachim Shekelberg Miss your headphone jack?
Serviceable if reverse engineering possible (datasheets for ICs available)
Ok I send 2 you and u can fix.
@@12voltvids In terms of economy you are fully right. But I won't say it isn't fixable.
@@12voltvids hi sir . I am lavkush . I am live india . Please help me . Marantz av sr7002 no sounds. Set working good
It's brand is Mi ,so the manufacturer is Xiaomi . I don't understand why they brand themselves this way !
It's almost as if they are trying to sound less Chinese...
@@ExtremeBogom Yes , I'm sure this is the intended purpose ! :)
Thanks
Another great vid..... Q. whats the best solder to get now... Thanks....
Couldn't tell ya. Kester probably, but I have been using cheap Chinese 60/40 lead rosin for years no problems.
@@12voltvids Thats good.. I use the same Chinese Solder but it's called Jinhu....
I want to buy a screwdriver like the orange one. Tell me the make and model podase. Thank you.
Picquik is the brand. Made in Vancouver Canada.
nomenclature is important:
1) It's NOT a transformer, it's an inductive coil
2) The ferrite substrate is there to shape the magnetic fields being generated.
3) The temperature sensor is NOT a "sensing coil" it's an NTC thermistor
4) the shielding is there to keep the magnetic field from interfering with the micro-controller signals. it literally has nothing to do with keeping people from looking at the design of the board.
at the end of the day, you don't really know what you're doing here do you? I mean, you used what can only be described as a comically oversized heat gun to take off shielding that literally any hot-air station could do quickly, and in the process, you scraped components off the board by not lifting the shielding properly, melted connectors by not protecting them before applying copious amounts of wide-area heat, blistered a capacitor...
At the end of the day, lack of knowledge, and lack of skill have eliminated any reasonable chance of diagnosing, or repairing this device.
Had you used the proper tools, taken your time, and lifted the shielding properly, it would have been trivial to track down the issue to a failed component. blaming a drop, or a component magically comming off the board, when you yourself scraped componants off means nothing. More than likely what happened to the unit (as is common with these types of units) is one two issues.
1) one of the MLCC's developed a flaw
2) One of the mosfets died (yes, what you called a transistor is actually going to be a mosfet)
Hopefully you'll lend more items to your daughter so we can see more repair vids from you! :) Cheers!
She is gone. All grown up and out of the house having her own life. Hopefully not too many more years and there will be grandchildren coming over for a visit! Did i just say that? Starting to feel really old.
depending on the phone ,mine have to be just so on the pad to work
crazy amount of silicon just to get joules into a phone. did this xioami guys never see a braun toothbrush?
Use a dremel tool to take the cover off.
Great now full of metal shavings.
Good good
nice tear down.
I don't know what hell they had you doing at work, but it must of been bad for you to mention it.
That r.f charger looks really well made, shame they didn't make it daughter proof lol .
I guess the parts were soldered first, then a special hot ring tool heated the outside only.
It was just a big job. I work for a big Telco and we get big jobs. I was working at a customer's home putting in fiber service with home phone, internet, 5 tvs and a full security system that includes home automation (door locks) sensors on windows and doors, motion detectirs, smoke detectors and 3 outdoor cameras. Did I mention it was raining all day too. This should have been a 2 man job but i got it all myself and these jobs take time. Started 8 am, left to go home 9 pm. Not impressed. Got my "lunch" break at 5pm. Was supposed to be done at 630. I actually had to go back the next day and move one of the cameras because the customer has a trailer to park in the driveway that blocked the shot. That would have been nice to know before putting it up and running the wire the first time.
@@12voltvids If i was your boss, you would get double pay for that.
Telco sound like thay don't give a shit about there engineers :-(
Oh my god! Abç 👏
NTC or PTC 🤔
NTC then lol I bet it was nuked with today's type c probably had 20v 4amp thru it lol not to mention the magnets am bit close for comfort design to fail 😃
The USBC i have here 9v 1 amp. I only have 1 USBC device, my Samsung s9
@@12voltvids Huawei mate p20 pro got the fast charge 5v and 20v 4amp I think maybe just to reduce heat from the plug lol
Thanks