In the past few weeks, ChargerLAB has torn down several MagSafe products.
But we forget the Apple standard MagSafe charger.
So, after a year since the release, let's see what looks like inside of this charger.
The packaging, ok, obvious apple's style.
Compatible info and system requirements are printed on the side.
Product model, A2140, is on the other side.
It supports input of 5V3A and 9V2.2A.
It is recommended to use a 20W charger, which is the same as the MagSafe Duo Charger.
Open the box.
Only MagSafe charger and some documents.
It comes with USB-C cable, and the junction of the cable and the charging pad has been protected.
The bottom and edges of the charging pad adopt aluminum alloy shell.
The top surface is rubber, feels like skin.
The length of the cable is about 1 m (3.3 ft)
The diameter is about 56mm (2.2 inches)
and the thickness is about 5mm (0.2 inches).
Then, let's take a look at its compatibility.
For iPhone 12 series, it can basically maintain 15W.
But as for Android phones. Most of them can only support 5W.
AirPods Pro will be 2W.
After the appearance and performance, let's tear it down.
Firstly, it's the USB-C port.
The inside PCB is reinforced and protected by steel sheets.
There are multiple chips on the front and back of the PCB.
A MOSFET is in the middle.
There's Type-C controller, which comes from Cypress CYPD2104.
This big chip comes from Texas Instruments.
Remove it with heat gun.
We found it's the boost converter, used to boost the input voltage and power the charger.
Model is TPS61178.
So, we can speculate that Apple's 15W wireless charging is step-up from the basis of 7.5W.
And use the charge pump to step-down.
The Schottky diode next to it comes from ON Semiconductor
and is used to improve conversion efficiency.
This alloy inductor is used for boosting.
It can be seen that this product is very high-qualified,
cause the input design is so complicated.
Next, Let's teardown the charging pad.
Remove the upper cover. We can see the charging coil is in the middle,
which is fixed and reinforced by glue.
The plastic ring can isolate the magnets and coil.
The PCB is at the bottom of the charging pad and fixed by glue.
The magnet ring on the edge is composed of multiple small magnets, and is also fixed by glue.
Back to the PCB.
The front is covered with shield.
And there are two holes on the shield.
Then, remove it by heating with a heat gun.
So, this small PCB has two parts.
The control part and the wireless charging part.
Here is the MPS step-down chip, which is used to power the microcontroller.
This is temperature detection chip, which comes from Texas Instruments TMP302.
It can be used for temperature detection and overheating protection.
The master control chip comes from STMicroelectronics.
It has high-performance basic series MCU with DSP and FPU.
And it also has 512 KB Flash, 180 MHz CPU,
ART accelerator and dual QSPI.
This is wireless charging controller, customized by STMicroelectronics and packaged by CSP.
It has built-in MOSFET driver.
There are two MOSFETs, used to drive the wireless charging coil.
Those are four white NPO resonant capacitors, and they are connected in parallel.
Well, that would be all components of this charger.
This charger adopts a very complicated boost circuit and puts it into the USB-C cable.
As the standard wireless charger for iPhone12, Its suppliers will be benefited,
such as STMicroelectronics and Texas Instruments.
But for customers, its charging speed is still a little bit slow,
and the heating problem still exists.
OK, that's all for today's video. Hope you like it and can subscribe to us.
You can also click the left side to see other teardown videos about Apple products.
See you next time. Bye.