At the recent autumn product launch conference, Apple brought brand new MacBook Pro products, not only equipped with the new M1 Pro and M1 Max processors, but also the 16-inch MacBook Pro also used 140W USB PD3.1 fast Charge. All new products this time ushered in the return of MagSafe magnetic charging port, HDMI port, and SD card slot, which greatly improved the user experience.
According to Apple’s official standard,MacBookAll Pro 2021 products are charged based on the MagSafe3 magnetic interface. The actual charging power of the 16-inch MacBook Pro measured by the charging head network can reach 140W, and it is also compatible with USB-C lightning interface charging.
Regarding Apple’s original 140W charger, the charging head net has shared the disassembly with you for the first time. As previously reported, this product applies a new LLC architecture and gallium nitride technology, becoming a sign of Apple’s entry into the gallium nitride fast charging market.
And as another indispensable 16-inch MacBook Pro to achieve 140W fast chargingAccessories, The USB-C to MagSafe3 cable included in the package is also worth mentioning. This is also the industry’s first cable (decoy cable) that supports USB PD3.1 fast charging. It has been put on the Apple Store separately at a retail price of 340RMB. Based on the MagSafe 3 cable, the 16-inch MacBook Pro can achieve a maximum charging power of 140W. Today I will continue to bring you the disassembly of this original charging cable.
Previously, the charging head network has also disassembled a lot of Apple’s original charging cables, such as Apple’s Thunderbolt 3 100W cable, Apple’s original 2m Thunderbolt 3 Pro data cable, and new models.iMacStandard configuration: USB-C to Lightning braided cable, Apple’s new USB-C to Lightning data charging cable, Apple’s original USB-C to Lightning fast charging cable, etc. If you are interested, you can click on the blue font to learn more.
1. Appearance of the original MagSafe3 charging cable for MacBook Pro
As a standard accessory of MacBook Pro, this USB-C to MagSafe3 cable is fixed with an environmentally friendly paper reel.
One end of the charging cable is a USB-C interface, and the other end is Apple’s third-generation MagSafe magnetic charging interface. The USB-C interface adopts a bright plastic shell. Compared with the conventional C-port, the tail is slightly longer; the magnetic interface is flat, with an aluminum alloy shell, and an LED indicator is located in the center on both sides.
A close-up of the USB-C interface, the product model number: A2363 can be seen printed on the end face.
USB-C uses a 14Pin connector.
The shell of the main part of the MagSafe3 magnetic interface is made of one-piece aluminum alloy with frosted surface.
The periphery of the end face is made of magnetic metal material, and 5 pogo pins are set in the center. Like the USB-C interface, MagSafe3 also supports positive and negative connections.
In the wire part, the coat is woven from gray and white threads, which is very flexible and more resistant to dirt and durability than the traditional TPE material.
The measured length of the entire cable is about 2 meters.
The net weight of the entire cable is about 58g.
Generally, the common 100W USB-C to USB-C fast charging cable will incorporate an E-Marker chip inside to improve safety. The E-Marker chip can record basic information such as cable power, data transmission capacity, and cable length. The charging head network used ChargerLAB POWER-Z KM001C to test the Apple line, and no relevant E-Marker information was detected.
Also use the tester for PD monitoring, showing that the cable does not apply for high-voltage output from the charger when the cable is under no load, but stays in the 5V mode, so the design is more safe.
The charging cable can be precisely aligned with the MacBook Pro through the MagSafe3 interface, and it can be fitted immediately without deliberate alignment.
When the cable is plugged in to charge the MacBook Pro, the LED indicator will glow white.
Use the MagSafe3 charging cable with Apple’s original 140W gallium nitride charger to charge the MacBook Pro 16. The measured voltage is 27.73V, the current is 4.92A, and the charging power is 136.68W. It enters the full-speed charging state.
At the same time, this USB-C to MagSafe cable can also be used with other brands of USB PD chargers to charge MacBook Pro 16, such as using an Apple 96W charger, charging voltage 20.31V, current 4.68A, and charging power approximately 95.21W.
2. Disassembly of the original MagSafe3 charging cable for MacBook Pro
Cut the cable around the waist, and the wire is covered with a woven net, and there is a layer of TPE inside.
Cut the wire sheath, inside are two layers of shielding nets with different winding directions.
Close-up of double-layer shielding net.
Inside the shielding net is the power cord and control cord, spirally wound.
Separate the cores, which include 5 thick wires, four red and one white, and 5 thin wires, two yellow, two silver, and one blue.
List of internal cores.
A close-up of the four red positive wires.
There is also a close-up of a white negative lead.
The outer skin of the thin wire is made of transparent material, and the inside is wound with flat copper foil, and a tensile wire is added.
The other root has the same structure.
A close-up of the thin cyan skin core.
The other two thin silver wires are close-ups, without skin.
Next look at the USB-C interface. After removing the plastic shell, it can be seen that the inside is an all-metal shell, which is fixed by laser spot welding.
Cut the metal housing from the side.
There is a small PCB board at the end of the USB-C interface, which is covered with chips.
A look at the front of the PCB board. The cable and PCB are fixed by a metal band, and the core solder joints are all glued and insulated.
On the back is a larger MOS tube.
The switch tube used to control the output.
In the center is a silk-screened 26DH158ADCY chip.
Next to it is a silk-printed PE chip.
The other chip is 11P 1XA, which is customized by Apple.
Four red cores are soldered in pairs on the PCB board for power transmission. At the same time, a thinner signal line is also soldered next to it.
The white core is soldered to the back, and there is also a cyan signal line next to it.
Cut and disassemble the aluminum alloy shell at the end of MagSafe3.
Many chips on the PCB are covered with hard glue. The end of the cable at this end is also fixed with a metal band, and the metal block at the interface end is fixed by spot welding. The hollow hole in the center shows the LED indicator, and there are two lights inside.
The other side is the same fixing method, and the chips on the PCB board are also glued.
The hard glue on the PCB board is very difficult to clean. It can only be judged that there is a chip in the lower left corner, and there is a chip and an inductor on the right.
On the left side of the other side are some blocking containers, and a few chips can be vaguely seen on the right side.
A close-up of the chip on the right.
All cables have been disassembled.
Summary of charging head network
The USB-C to MagSafe3 charging cable provided by Apple is excellent in terms of feel, experience and workmanship. It seems to be a conventional “PD to DC” charging cable, but in fact, the USB PD3.1 fast charging protocol recognition and communication function has been added to the cable. When connected to a 140W USB-C charger and a 16-inch MacBook Pro, it can output 28V The voltage charges the computer, and the cable can also select the correct charging voltage according to different PD chargers connected to it.
The disassembly of the charging head net found that the internal structure of the cable is quite complicated. Whether it is the USB-C interface or the MagSafe3 interface, multiple custom chips are set on the PCB. In addition to the more durable woven coat, the cable part is also provided with a layer of TPE. In addition to the shielding layer, a total of 10 cores are used, of which 5 thick wires are used for power transmission with the shielding layer, and the other 5 thin wires are used for signal transmission. The connection between the cable and the PCB board is fixed with a metal band to prevent the solder joint from falling off due to the force of the cable during use.
